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Commit acc05041 authored by Eric Duminil's avatar Eric Duminil
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Remove stuff

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experimental/example_for_iotwebconf
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ampel-firmware/co2_sensor.cpp deleted 100644 → 0
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View file @ 90f80906
#include "co2_sensor.h"
#include "web_config.h"
#include "ntp.h"
#include "led_effects.h"
#include "sensor_console.h"
#include <Wire.h>
// The SCD30 from Sensirion is a high quality Nondispersive Infrared (NDIR) based CO₂ sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%).
// https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library
#include "src/lib/SparkFun_SCD30_Arduino_Library/src/SparkFun_SCD30_Arduino_Library.h" // From: http://librarymanager/All#SparkFun_SCD30
namespace config {
const uint16_t measurement_timestep_bootup = 5; // [s] Measurement timestep during acclimatization.
const uint8_t max_deviation_during_bootup = 20; // [%]
const int8_t max_deviation_during_calibration = 30; // [ppm]
const int16_t timestep_during_calibration = 10; // [s] WARNING: Measurements can be unreliable for timesteps shorter than 10s.
const int8_t stable_measurements_before_calibration = 120 / timestep_during_calibration; // [-] Stable measurements during at least 2 minutes.
const uint16_t co2_alert_threshold = 2000; // [ppm] Display a flashing led ring, if concentration exceeds this value
const bool debug_sensor_states = false; // If true, log state transitions over serial console
}
namespace sensor {
SCD30 scd30;
uint16_t co2 = 0;
float temperature = 0;
float humidity = 0;
char timestamp[23];
int16_t stable_measurements = 0;
/**
* Define sensor states
* BOOTUP -> initial state, until first >0 ppm values are returned
* READY -> sensor does output valid information (> 0 ppm) and no other condition takes place
* NEEDS_CALIBRATION -> sensor measurements are too low (< 250 ppm)
* PREPARE_CALIBRATION_UNSTABLE -> forced calibration was initiated, last measurements were too far apart
* PREPARE_CALIBRATION_STABLE -> forced calibration was initiated, last measurements were close to each others
*/
enum state {
BOOTUP,
READY,
NEEDS_CALIBRATION,
PREPARE_CALIBRATION_UNSTABLE,
PREPARE_CALIBRATION_STABLE
};
const char *state_names[] = {
"BOOTUP",
"READY",
"NEEDS_CALIBRATION",
"PREPARE_CALIBRATION_UNSTABLE",
"PREPARE_CALIBRATION_STABLE" };
state current_state = BOOTUP;
void switchState(state);
void setCO2forDebugging(int32_t fakeCo2);
void calibrateSensorToSpecificPPM(int32_t calibrationLevel);
void calibrateSensorRightNow(int32_t calibrationLevel);
void setAutoCalibration(int32_t autoCalibration);
void initialize() {
#if defined(ESP8266)
Wire.begin(12, 14); // ESP8266 - D6, D5;
#endif
#if defined(ESP32)
Wire.begin(21, 22); // ESP32
/**
* SCD30 ESP32
* VCC --- 3V3
* GND --- GND
* SCL --- SCL (GPIO22) //NOTE: GPIO3 Would be more convenient (right next to GND)
* SDA --- SDA (GPIO21) //NOTE: GPIO1 would be more convenient (right next to GPO3)
*/
#endif
Serial.println();
scd30.enableDebugging(); // Prints firmware version in the console.
if (!scd30.begin(config::auto_calibrate_sensor)) {
Serial.println(F("ERROR - CO2 sensor not detected. Please check wiring!"));
led_effects::showKITTWheel(color::red, 30);
ESP.restart();
}
// Changes of the SCD30's measurement timestep do not come into effect
// before the next measurement takes place. That means that after a hard reset
// of the ESP the SCD30 sometimes needs a long time until switching back to 2 s
// for acclimatization. Resetting it after startup seems to fix this behaviour.
scd30.reset();
//NOTE: It seems that the sensor needs some time for getting/setting temperature offset.
delay(500);
Serial.print(F("Setting temperature offset to -"));
Serial.print(abs(config::temperature_offset));
Serial.println(F(" K."));
scd30.setTemperatureOffset(abs(config::temperature_offset)); // setTemperatureOffset only accepts positive numbers, but shifts the temperature down.
delay(500);
//NOTE: Even once the temperature offset is saved, the sensor still needs some time (~10 minutes?) to apply it.
Serial.print(F("Temperature offset is : "));
Serial.print(getTemperatureOffset());
Serial.println(F(" K"));
Serial.print(F("Auto-calibration is "));
Serial.println(config::auto_calibrate_sensor ? "ON." : "OFF.");
// SCD30 has its own timer.
//NOTE: The timer seems to be inaccurate, though, possibly depending on voltage. Should it be offset?
Serial.println();
Serial.print(F("Setting SCD30 timestep to "));
Serial.print(config::measurement_timestep_bootup);
Serial.println(F(" s during acclimatization."));
scd30.setMeasurementInterval(config::measurement_timestep_bootup); // [s]
sensor_console::defineIntCommand("co2", setCO2forDebugging, F("1500 (Sets co2 level, for debugging)"));
sensor_console::defineIntCommand("timer", setTimer, F("30 (Sets measurement interval, in s)"));
sensor_console::defineCommand("calibrate", startCalibrationProcess, F("(Starts calibration process)"));
sensor_console::defineIntCommand("calibrate", calibrateSensorToSpecificPPM,
F("600 (Starts calibration process, to given ppm)"));
sensor_console::defineIntCommand("calibrate!", calibrateSensorRightNow,
F("600 (Calibrates right now, to given ppm)"));
sensor_console::defineIntCommand("auto_calibrate", setAutoCalibration, F("0/1 (Disables/enables autocalibration)"));
sensor_console::defineCommand("reset_scd", resetSCD, F("(Resets SCD30)"));
}
bool hasSensorSettled() {
static uint16_t last_co2 = 0;
uint16_t delta;
delta = abs(co2 - last_co2);
last_co2 = co2;
// We assume the sensor has acclimated to the environment if measurements
// change less than a specified percentage of the current value.
return (co2 > 0 && delta < ((uint32_t) co2 * config::max_deviation_during_bootup / 100));
}
bool enoughStableMeasurements() {
static int16_t previous_co2 = 0;
if (co2 > (previous_co2 - config::max_deviation_during_calibration)
&& co2 < (previous_co2 + config::max_deviation_during_calibration)) {
stable_measurements++;
Serial.print(F("Number of stable measurements : "));
Serial.print(stable_measurements);
Serial.print(F(" / "));
Serial.println(config::stable_measurements_before_calibration);
switchState(PREPARE_CALIBRATION_STABLE);
} else {
stable_measurements = 0;
switchState(PREPARE_CALIBRATION_UNSTABLE);
}
previous_co2 = co2;
return (stable_measurements == config::stable_measurements_before_calibration);
}
void startCalibrationProcess() {
/** From the sensor documentation:
* Before applying FRC, SCD30 needs to be operated for 2 minutes with the desired measurement period in continuous mode.
*/
Serial.print(F("Setting SCD30 timestep to "));
Serial.print(config::timestep_during_calibration);
Serial.println(F("s, prior to calibration."));
scd30.setMeasurementInterval(config::timestep_during_calibration); // [s] The change will only take effect after next measurement.
Serial.println(F("Waiting until the measurements are stable for at least 2 minutes."));
Serial.println(F("It could take a very long time."));
switchState(PREPARE_CALIBRATION_UNSTABLE);
}
void calibrate() {
Serial.print(F("Calibrating SCD30 now..."));
scd30.setAltitudeCompensation(config::altitude_above_sea_level);
scd30.setForcedRecalibrationFactor(config::co2_calibration_level);
Serial.println(F(" Done!"));
Serial.println(F("Sensor calibrated."));
switchState(BOOTUP); // In order to stop the calibration and select the desired timestep.
//WARNING: Do not reset the ampel or the SCD30!
//At least one measurement needs to happen in order for the calibration to be correctly applied.
}
void logToSerial() {
Serial.print(timestamp);
Serial.print(F(" - co2(ppm): "));
Serial.print(co2);
Serial.print(F(" temp(C): "));
Serial.print(temperature, 1);
Serial.print(F(" humidity(%): "));
Serial.println(humidity, 1);
}
void switchState(state new_state) {
if (new_state == current_state) {
return;
}
if (config::debug_sensor_states) {
Serial.print(F("Changing sensor state: "));
Serial.print(state_names[current_state]);
Serial.print(F(" -> "));
Serial.println(state_names[new_state]);
}
current_state = new_state;
}
void switchStateForCurrentPPM() {
if (current_state == BOOTUP) {
if (!hasSensorSettled()) {
return;
}
switchState(READY);
Serial.println(F("Sensor acclimatization finished."));
Serial.print(F("Setting SCD30 timestep to "));
Serial.print(config::measurement_timestep);
Serial.println(F(" s."));
if (config::measurement_timestep < 10) {
Serial.println(F("WARNING: Timesteps shorter than 10s can lead to unreliable measurements!"));
}
scd30.setMeasurementInterval(config::measurement_timestep); // [s]
}
// Check for pre-calibration states first, because we do not want to
// leave them before calibration is done.
if ((current_state == PREPARE_CALIBRATION_UNSTABLE) || (current_state == PREPARE_CALIBRATION_STABLE)) {
if (enoughStableMeasurements()) {
calibrate();
}
} else if (co2 < 250) {
// Sensor should be calibrated.
switchState(NEEDS_CALIBRATION);
} else {
switchState(READY);
}
}
void displayCO2OnLedRing() {
/**
* Display data, even if it's "old" (with breathing).
* A short delay is required in order to let background tasks run on the ESP8266.
* see https://github.com/esp8266/Arduino/issues/3241#issuecomment-301290392
*/
if (co2 < config::co2_alert_threshold) {
led_effects::displayCO2color(co2);
delay(100);
} else {
// Display a flashing led ring, if concentration exceeds a specific value
led_effects::alert(color::red);
}
}
void showState() {
switch (current_state) {
case BOOTUP:
led_effects::showWaitingLED(color::blue);
break;
case READY:
displayCO2OnLedRing();
break;
case NEEDS_CALIBRATION:
led_effects::showWaitingLED(color::magenta);
break;
case PREPARE_CALIBRATION_UNSTABLE:
led_effects::showWaitingLED(color::red);
break;
case PREPARE_CALIBRATION_STABLE:
led_effects::showWaitingLED(color::green);
break;
default:
Serial.println(F("Encountered unknown sensor state")); // This should not happen.
}
}
/** Gets fresh data if available, checks calibration status, displays CO2 levels.
* Returns true if fresh data is available, for further processing (e.g. MQTT, CSV or LoRa)
*/
bool processData() {
bool freshData = scd30.dataAvailable();
if (freshData) {
ntp::getLocalTime(timestamp);
co2 = scd30.getCO2();
temperature = scd30.getTemperature();
humidity = scd30.getHumidity();
switchStateForCurrentPPM();
// Log every time fresh data is available.
logToSerial();
}
showState();
// Report data for further processing only if the data is reliable
// (state 'READY') or manual calibration is necessary (state 'NEEDS_CALIBRATION').
return freshData && (current_state == READY || current_state == NEEDS_CALIBRATION);
}
float getTemperatureOffset() {
return -abs(scd30.getTemperatureOffset());
}
/*****************************************************************
* Callbacks for sensor commands *
*****************************************************************/
void setCO2forDebugging(int32_t fakeCo2) {
Serial.print(F("DEBUG. Setting CO2 to "));
co2 = fakeCo2;
Serial.println(co2);
switchStateForCurrentPPM();
}
void setAutoCalibration(int32_t autoCalibration) {
config::auto_calibrate_sensor = autoCalibration;
scd30.setAutoSelfCalibration(autoCalibration);
Serial.print(F("Setting auto-calibration to : "));
Serial.println(autoCalibration ? F("On.") : F("Off."));
}
void setTimer(int32_t timestep) {
if (timestep >= 2 && timestep <= 1800) {
Serial.print(F("Setting Measurement Interval to : "));
Serial.print(timestep);
Serial.println(F("s (change will only be applied after next measurement)."));
scd30.setMeasurementInterval(timestep);
config::measurement_timestep = timestep;
led_effects::showKITTWheel(color::green, 1);
}
}
void calibrateSensorToSpecificPPM(int32_t calibrationLevel) {
if (calibrationLevel >= 400 && calibrationLevel <= 2000) {
Serial.print(F("Force calibration, at "));
config::co2_calibration_level = calibrationLevel;
Serial.print(config::co2_calibration_level);
Serial.println(F(" ppm."));
startCalibrationProcess();
}
}
void calibrateSensorRightNow(int32_t calibrationLevel) {
if (calibrationLevel >= 400 && calibrationLevel <= 2000) {
Serial.print(F("Force calibration, right now, at "));
config::co2_calibration_level = calibrationLevel;
Serial.print(config::co2_calibration_level);
Serial.println(F(" ppm."));
calibrate();
}
}
void resetSCD() {
Serial.print(F("Resetting SCD30..."));
scd30.reset();
Serial.println(F("done."));
}
}
ampel-firmware/co2_sensor.h deleted 100644 → 0
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#ifndef CO2_SENSOR_H_
#define CO2_SENSOR_H_
#include <stdint.h> // For uint16_t
namespace sensor {
extern uint16_t co2;
extern float temperature;
extern float humidity;
extern char timestamp[];
void initialize();
bool processData();
void startCalibrationProcess();
void setTimer(int32_t timestep);
void resetSCD();
float getTemperatureOffset();
}
#endif
ampel-firmware/config.public.h deleted 100644 → 0
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#ifndef CONFIG_H_INCLUDED
# define CONFIG_H_INCLUDED
/*** _ _
* / \ _ __ ___ _ __ ___| |
* / _ \ | '_ ` _ \| '_ \ / _ \ |
* / ___ \| | | | | | |_) | __/ |
* /_/ __\_\_| |_| |_| .__/_\___|_|
* / ___|___ _ __|_/ _(_) __ _
* | | / _ \| '_ \| |_| |/ _` |
* | |__| (_) | | | | _| | (_| |
* \____\___/|_| |_|_| |_|\__, |
* |___/
***/
// This file is a config template, and can be copied to config.h.
// Please don't save any important password in this template.
// IMPORTANT: Parameters defined in config.h are only default values, and are applied if:
// * the ampel is flashed for the first time
// * or 'reset_config' command is called
// * or AMPEL_CONFIG_VERSION has been changed.
// Once those default values have been applied, uploading the firmware with a modified config.h will not update the ampel configuration!
// Every parameter can be modified and saved later via the web-config.
// Some of those parameters can also be modified via commands in the Serial monitor :
// e.g. 'wifi 0' to turn WiFi off, or 'csv 60' to log data in csv every minute.
/***
* AMPEL
*/
// You can rename the Ampel if you want.
// This name will be used for CSV files and the mDNS address.
// You'll get a new CSV file after renaming, which can be convenient, e.g. after moving
// the ampel to another room.
// If left empty, the name will be ESPxxxxxx, where xxxxxx represent the last half of the MAC address.
# define AMPEL_NAME ""
// This password will be used for Access Point (without username), and for web-server available at http://local_ip with user 'admin', without quotes.
// If left empty, the password will have to be set during the first configuration, via access point.
// In order to be set successfully, it should have at least 8 characters.
# define AMPEL_PASSWORD ""
// AMPEL_CONFIG_VERSION should be defined, and have exactly 3 characters.
// If you modify this string, every parameter saved on the Ampel will be replaced by the ones in config.h.
// AMPEL_CONFIG_VERSION should also be updated if the configuration structure is modified.
// The structure of the Ampel configuration has been modified 11 times, so it's called "a11" for now.
# define AMPEL_CONFIG_VERSION "a11"
/**
* SERVICES
*/
// Define the default for corresponding services. They can be enabled/disabled later in the web-config.
# define AMPEL_WIFI true // Should ESP connect to WiFi? Web configuration will not be available when set to false. Use "wifi 1" command to set to true.
# define AMPEL_MQTT true // Should data be sent over MQTT? (AMPEL_WIFI should be enabled too)
# define AMPEL_CSV true // Should data be logged as CSV, on the ESP flash memory?
# define AMPEL_LORAWAN false // Should data be sent over LoRaWAN? (Requires ESP32 + LoRa modem, and "MCCI LoRaWAN LMIC library")
/**
* WIFI
*/
// SSID and PASSWORD need to be defined, but can be empty.
# define WIFI_SSID ""
# define WIFI_PASSWORD ""
// How long should the Ampel try to connect to WIFI_SSID?
# define WIFI_TIMEOUT 30 // [s]
// If the Ampel cannot connect to WIFI_SSID, it will start an Access Point for ACCESS_POINT_TIMEOUT seconds.
// If someone connects to this Access Point, the Ampel will stay in this mode until everybody logs out.
// If nobody connects to the Access Point before ACCESS_POINT_TIMEOUT seconds, the Ampel will try to connect WIFI_SSID again.
# define ACCESS_POINT_TIMEOUT 60 // [s]
/**
* Sensor
*/
// How often should measurement be performed, and displayed?
//WARNING: On some sensors, measurements become very unreliable when timestep is set to 2s.
//NOTE: 10s or longer should be fine in order to get reliable results.
//NOTE: SCD30 timer does not seem to be very precise. Time variations may occur.
# define MEASUREMENT_TIMESTEP 60 // [s] Value between 2 and 1800 (range for SCD30 sensor)
// How often should measurements be appended to CSV ?
// Set to 0 if you want to send values after each measurement
// WARNING: Writing too often might damage the ESP memory
# define CSV_INTERVAL 300 // [s]
// Residual heat from CO2 sensor seems to be high enough to change the temperature reading. How much should it be offset?
// NOTE: Sign isn't relevant. The returned temperature will always be shifted down.
# define TEMPERATURE_OFFSET -3 // [K]
// Altitude above sea level
// Used for CO2 calibration
// here: Stuttgart, Schellingstr. 24. (Source: Google Earth)
# define ALTITUDE_ABOVE_SEA_LEVEL 260 // [m]
// The reference CO2 concentration has to be within the range 400 ppm ≤ cref(CO2) ≤ 2000 ppm.
// Used for CO2 calibration
// here : measured concentration in Stuttgart
# define ATMOSPHERIC_CO2_CONCENTRATION 425 // [ppm]
// Should the sensor try to calibrate itself?
// Sensirion recommends 7 days of continuous readings with at least 1 hour a day of 'fresh air' for self-calibration to complete.
# define AUTO_CALIBRATE_SENSOR false // [true / false]
/**
* LEDs
*/
// LED brightness, which can vary between min and max brightness ("LED breathing")
// MAX_BRIGHTNESS must be defined, and should be between 0 and 255.
# define MAX_BRIGHTNESS 255
// MIN_BRIGHTNESS, if defined, should be between 0 and MAX_BRIGHTNESS - 1
// If MIN_BRIGHTNESS is set to MAX_BRIGHTNESS, breathing is disabled.
# define MIN_BRIGHTNESS 60
// How many LEDs in the ring? 12 and 16 are currently supported.
# define LED_COUNT 12
/**
* MQTT
*/
/*
* If AMPEL_MQTT is enabled, co2ampel will publish data every MQTT_SENDING_INTERVAL seconds.
* An MQTT subscriber can then get the data from the corresponding broker, either encrypted or unencrypted:
*
* ❯ mosquitto_sub -h 'test.mosquitto.org' -p 8883 -t 'CO2sensors/#' --cafile mosquitto.org.crt -v
* CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:14:37+01", "co2":571, "temp":18.9, "rh":50.9}
* CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:14:48+01", "co2":573, "temp":18.9, "rh":50.2}
* ...
*
* ❯ mosquitto_sub -h 'test.mosquitto.org' -t 'CO2sensors/#' -v
* CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:15:09+01", "co2":568, "temp":18.9, "rh":50.1}
* CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:15:20+01", "co2":572, "temp":18.9, "rh":50.3}
* ...
*/
/*
* Allow sensor to be configured over MQTT? Very useful for debugging. For example:
* mosquitto_pub -h 'test.mosquitto.org' -t 'CO2sensors/ESPe08dc9/control' -m 'timer 30'
* mosquitto_pub -h 'test.mosquitto.org' -t 'CO2sensors/ESPe08dc9/control' -m 'calibrate'
* mosquitto_pub -h 'test.mosquitto.org' -t 'CO2sensors/ESPe08dc9/control' -m 'reset'
*/
# define ALLOW_MQTT_COMMANDS false
// How often should measurements be sent to MQTT server?
// Set to 0 if you want to send values after each measurement
// # define MQTT_SENDING_INTERVAL MEASUREMENT_TIMESTEP * 5 // [s]
# define MQTT_SENDING_INTERVAL 300 // [s]
# define MQTT_SERVER "test.mosquitto.org" // MQTT server URL or IP address
# define MQTT_PORT 8883
# define MQTT_ENCRYPTED true // Set to false for unencrypted MQTT (e.g. with port 1883).
# define MQTT_USER ""
# define MQTT_PASSWORD ""
# define MQTT_TOPIC_PREFIX "CO2sensors/" // ESPxxxxxx will be added to the prefix, so complete topic will be "CO2sensors/ESPxxxxxx". The prefix should probably end with '/'
/**
* LoRaWAN
*/
// 1) Requires "MCCI LoRaWAN LMIC library", which will be automatically used with PlatformIO but should be added in "Arduino IDE".
// 2) Region and transceiver type should be specified in:
// * Arduino/libraries/MCCI_LoRaWAN_LMIC_library/project_config/lmic_project_config.h for Arduino IDE
// * platformio.ini for PlatformIO
// See https://github.com/mcci-catena/arduino-lmic#configuration for more information
// 3) It has been tested with "TTGO ESP32 SX1276 LoRa 868" and will only work with an ESP32 + LoRa modem
// 4) In order to use LoRaWAN, a gateway should be close to the co2ampel, and an account, an application and a device should be registered,
// e.g. on https://www.thethingsindustries.com/docs/integrations/
// with "Europe 863-870 MHz (SF9 for RX2 - recommended)", "MAC v1.0.3"
// 5) The corresponding keys should be defined in LORAWAN_DEVICE_EUI, LORAWAN_APPLICATION_EUI and LORAWAN_APPLICATION_KEY
// How often should measurements be sent over LoRaWAN?
# define LORAWAN_SENDING_INTERVAL 300 // [s] This value should not be too low. See https://www.thethingsnetwork.org/docs/lorawan/duty-cycle.html#maximum-duty-cycle
// WARNING: If AMPEL_LORAWAN is true, you need to modify the 3 following constants
// They are written as hexadecimal strings, and will be parsed in the correct order.
// This EUI must be in big-endian format, so most-significant-byte first.
// You can copy the string from TheThingsNetwork as-is, without reversing the bytes.
// For TheThingsNetwork issued EUIs the string should start with "70B3D5..."
# define LORAWAN_DEVICE_EUI "70B3D57ED004CB17"
// This should also be in big-endian format, and can be copied as is from TheThingsNetwork.
# define LORAWAN_APPLICATION_EUI "0102030405060708"
// This should also be in big-endian format, and can be copied as is from TheThingsNetwork.
# define LORAWAN_APPLICATION_KEY "9D06308E20B974919DA6404E063BE01D"
/**
* NTP
*/
# define NTP_SERVER "pool.ntp.org"
# define UTC_OFFSET 1 // [h] +1 for Paris/Berlin, -5 for NYC
# define DAYLIGHT_SAVING_TIME false // true in summer, false in winter
#endif
ampel-firmware/csv_writer.cpp deleted 100644 → 0
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#include "csv_writer.h"
#include "web_config.h"
#include "ntp.h"
#include "led_effects.h"
#include "sensor_console.h"
namespace csv_writer {
unsigned long last_written_at = 0;
char last_successful_write[23];
#if defined(ESP8266)
/**
* SPECIFIC FUNCTIONS FOR LITTLEFS
*/
FSInfo fs_info;
bool mountFS() {
return LittleFS.begin(); // format if needed.
}
void updateFsInfo() {
FS_LIB.info(fs_info);
}
int getTotalSpace() {
return fs_info.totalBytes;
}
int getUsedSpace() {
return fs_info.usedBytes;
}
void showFilesystemContent() {
Dir dir = FS_LIB.openDir("/");
while (dir.next()) {
Serial.print(" ");
Serial.print(dir.fileName());
Serial.print(" - ");
if (dir.fileSize()) {
File f = dir.openFile("r");
Serial.println(f.size());
f.close();
} else {
Serial.println("0");
}
}
}
#elif defined(ESP32)
/**
* SPECIFIC FUNCTIONS FOR SPIFFS
*/
bool mountFS() {
return SPIFFS.begin(true); // format if needed.
}
void updateFsInfo() {
// Nothing to do.
}
int getTotalSpace() {
return SPIFFS.totalBytes();
}
int getUsedSpace() {
return SPIFFS.usedBytes();
}
void showFilesystemContent() {
File root = SPIFFS.open("/");
File file = root.openNextFile();
while (file) {
Serial.print(" ");
Serial.print(file.name());
Serial.print(" - ");
Serial.println(file.size());
file = root.openNextFile();
}
}
#endif
char filename[20]; // e.g. "/ESPxxxxxx.csv\0"
int getAvailableSpace() {
return getTotalSpace() - getUsedSpace();
}
void initialize(const char *basename) {
snprintf(filename, sizeof(filename), "/%.14s.csv", basename);
Serial.println();
Serial.print(F("Initializing FS..."));
if (mountFS()) {
Serial.println(F("done."));
} else {
Serial.println(F("fail."));
return;
}
updateFsInfo();
Serial.println(F("File system info:"));
Serial.print(F(" Total space : "));
Serial.print(getTotalSpace() / 1024);
Serial.println("kB");
Serial.print(F(" Used space : "));
Serial.print(getUsedSpace() / 1024);
Serial.println("kB");
Serial.print(F(" Available space: "));
Serial.print(getAvailableSpace() / 1024);
Serial.println("kB");
Serial.println();
// Open dir folder
Serial.println(F("Filesystem content:"));
showFilesystemContent();
Serial.println();
sensor_console::defineIntCommand("csv", setCSVinterval, F("60 (Sets CSV writing interval, in s)"));
sensor_console::defineCommand("format_filesystem", formatFilesystem, F("(Deletes the whole filesystem)"));
sensor_console::defineCommand("show_csv", showCSVContent, F("(Displays the complete CSV file on Serial)"));
}
File openOrCreate() {
File csv_file;
if (FS_LIB.exists(filename)) {
csv_file = FS_LIB.open(filename, "a+");
} else {
csv_file = FS_LIB.open(filename, "w");
csv_file.print(F("Sensor time;CO2 concentration;Temperature;Humidity\r\n"));
csv_file.print(F("YYYY-MM-DD HH:MM:SS+ZZ;ppm;degC;%\r\n"));
}
return csv_file;
}
void log(const char *timestamp, const int16_t &co2, const float &temperature, const float &humidity) {
led_effects::onBoardLEDOn();
File csv_file = openOrCreate();
char csv_line[42];
snprintf(csv_line, sizeof(csv_line), "%s;%d;%.1f;%.1f\r\n", timestamp, co2, temperature, humidity);
if (csv_file) {
size_t written_bytes = csv_file.print(csv_line);
csv_file.close();
if (written_bytes == 0) {
Serial.println(F("Nothing written. Disk full?"));
} else {
Serial.print(F("CSV - Wrote : "));
Serial.print(csv_line);
ntp::getLocalTime(last_successful_write);
}
updateFsInfo();
delay(50);
} else {
//NOTE: Can it ever happen that outfile is false?
Serial.println(F("Problem on create file!"));
}
led_effects::onBoardLEDOff();
}
void logIfTimeHasCome(const char *timeStamp, const int16_t &co2, const float &temperature, const float &humidity) {
unsigned long now = seconds();
if (now - last_written_at > config::csv_interval) {
last_written_at = now;
log(timeStamp, co2, temperature, humidity);
}
}
/*****************************************************************
* Callbacks for sensor commands *
*****************************************************************/
void setCSVinterval(int32_t csv_interval) {
config::csv_interval = csv_interval;
Serial.print(F("Setting CSV Interval to : "));
Serial.print(config::csv_interval);
Serial.println("s.");
led_effects::showKITTWheel(color::green, 1);
}
void showCSVContent() {
//TODO: Now that ampel_name can be set, should show the content of every csv
Serial.print(F("### "));
Serial.print(filename);
Serial.println(F(" ###"));
File csv_file;
if (FS_LIB.exists(filename)) {
csv_file = FS_LIB.open(filename, "r");
while (csv_file.available()) {
Serial.write(csv_file.read());
}
csv_file.close();
}
Serial.println(F("######################"));
}
void formatFilesystem() {
FS_LIB.format();
led_effects::showKITTWheel(color::blue, 2);
}
}
ampel-firmware/csv_writer.h deleted 100644 → 0
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#ifndef CSV_WRITER_H_
#define CSV_WRITER_H_
#if defined(ESP8266)
# include <LittleFS.h>
# define FS_LIB LittleFS
#elif defined(ESP32)
# include <SPIFFS.h>
# define FS_LIB SPIFFS
#else
# error Board should be either ESP8266 or ESP832
#endif
//NOTE: LittleFS will be available for Arduino esp32 core v2
namespace csv_writer {
extern char last_successful_write[];
void initialize(const char *basename);
void logIfTimeHasCome(const char *timestamp, const int16_t &co2, const float &temperature, const float &humidity);
int getAvailableSpace();
extern char filename[];
void setCSVinterval(int32_t csv_interval);
void showCSVContent();
void formatFilesystem();
}
#endif
ampel-firmware/led_effects.cpp deleted 100644 → 0
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#include "led_effects.h"
#include "web_config.h"
#include "sensor_console.h"
// Adafruit NeoPixel (Arduino library for controlling single-wire-based LED pixels and strip)
// https://github.com/adafruit/Adafruit_NeoPixel
// Documentation : http://adafruit.github.io/Adafruit_NeoPixel/html/class_adafruit___neo_pixel.html
#include "src/lib/Adafruit_NeoPixel/Adafruit_NeoPixel.h"
/*****************************************************************
* Configuration *
*****************************************************************/
namespace config {
const int kitt_tail = 3; // How many dimmer LEDs follow in K.I.T.T. wheel
const uint16_t poor_air_quality_ppm = 1600; // Above this threshold, LED breathing effect is faster.
bool display_led = true; // Will be set to false during "night mode".
//NOTE: One value has been prepended, to make calculations easier and avoid out of bounds index.
uint16_t co2_ticks[16 + 1] = { 0, 500, 600, 700, 800, 900, 1000 }; // rest will be filled later
// For a given LED, which color should be displayed? First LED will be pure green (hue angle 120°),
// LEDs >= 1600ppm will be pure red (hue angle 0°), LEDs in-between will be yellowish.
uint16_t led_hues[16];
}
#if defined(ESP8266)
// NeoPixels on GPIO05, aka D1 on ESP8266.
const int NEOPIXELS_PIN = 5;
#elif defined(ESP32)
// NeoPixels on GPIO23 on ESP32. To avoid conflict with LoRa_SCK on TTGO.
const int NEOPIXELS_PIN = 23;
#endif
// config::led_count is not yet known, will be set later.
Adafruit_NeoPixel pixels(0, NEOPIXELS_PIN, NEO_GRB + NEO_KHZ800);
namespace led_effects {
//On-board LED on D4, aka GPIO02
const int ONBOARD_LED_PIN = 2;
void setupOnBoardLED() {
pinMode(ONBOARD_LED_PIN, OUTPUT);
}
void onBoardLEDOff() {
//NOTE: OFF is LOW on ESP32 and HIGH on ESP8266 :-/
#ifdef ESP8266
digitalWrite(ONBOARD_LED_PIN, HIGH);
#else
digitalWrite(ONBOARD_LED_PIN, LOW);
#endif
}
void onBoardLEDOn() {
#ifdef ESP8266
digitalWrite(ONBOARD_LED_PIN, LOW);
#else
digitalWrite(ONBOARD_LED_PIN, HIGH);
#endif
}
void LEDsOff() {
pixels.clear();
pixels.show();
onBoardLEDOff();
}
void showColor(int32_t color) {
config::display_led = false; // In order to avoid overwriting the desired color next time CO2 is displayed
pixels.setBrightness(255);
pixels.fill(color);
pixels.show();
}
void setupRing() {
Serial.print(F("Ring : "));
Serial.print(config::led_count);
Serial.println(F(" LEDs."));
pixels.updateLength(config::led_count);
if (config::led_count == 12) {
config::co2_ticks[7] = 1200;
config::co2_ticks[8] = 1400;
config::co2_ticks[9] = 1600;
config::co2_ticks[10] = 1800;
config::co2_ticks[11] = 2000;
config::co2_ticks[12] = 2200;
config::led_hues[0] = 21845U;
config::led_hues[1] = 19114U;
config::led_hues[2] = 16383U;
config::led_hues[3] = 13653U;
config::led_hues[4] = 10922U;
config::led_hues[5] = 8191U;
config::led_hues[6] = 5461U;
config::led_hues[7] = 2730U;
config::led_hues[8] = 0;
config::led_hues[9] = 0;
config::led_hues[10] = 0;
config::led_hues[11] = 0;
} else if (config::led_count == 16) {
config::co2_ticks[7] = 1100;
config::co2_ticks[8] = 1200;
config::co2_ticks[9] = 1300;
config::co2_ticks[10] = 1400;
config::co2_ticks[11] = 1500;
config::co2_ticks[12] = 1600;
config::co2_ticks[13] = 1700;
config::co2_ticks[14] = 1800;
config::co2_ticks[15] = 2000;
config::co2_ticks[16] = 2200;
config::led_hues[0] = 21845U;
config::led_hues[1] = 19859U;
config::led_hues[2] = 17873U;
config::led_hues[3] = 15887U;
config::led_hues[4] = 13901U;
config::led_hues[5] = 11915U;
config::led_hues[6] = 9929U;
config::led_hues[7] = 7943U;
config::led_hues[8] = 5957U;
config::led_hues[9] = 3971U;
config::led_hues[10] = 1985U;
config::led_hues[11] = 0;
config::led_hues[12] = 0;
config::led_hues[13] = 0;
config::led_hues[14] = 0;
config::led_hues[15] = 0;
} else {
// "Only 12 and 16 LEDs rings are currently supported."
config::display_led = false;
}
pixels.begin();
pixels.setBrightness(config::max_brightness);
LEDsOff();
sensor_console::defineIntCommand("led", turnLEDsOnOff, F("0/1 (Turns LEDs on/off)"));
sensor_console::defineIntCommand("color", showColor, F("0xFF0015 (Shows color, specified as RGB, for debugging)"));
}
void toggleNightMode() {
turnLEDsOnOff(!config::display_led);
}
void turnLEDsOnOff(int32_t display_led) {
//TODO: Could use strategy pattern with 2 different Effects classes.
config::display_led = display_led;
if (config::display_led) {
Serial.println(F("LEDs are on!"));
} else {
Serial.println(F("Night mode!"));
LEDsOff();
}
}
//NOTE: basically one iteration of KITT wheel
void showWaitingLED(uint32_t color) {
using namespace config;
delay(80);
if (!display_led) {
return;
}
static uint16_t kitt_offset = 0;
pixels.clear();
for (int j = kitt_tail; j >= 0; j--) {
int ledNumber = abs((kitt_offset - j + led_count) % (2 * led_count) - led_count) % led_count; // Triangular function
pixels.setPixelColor(ledNumber, color * pixels.gamma8(255 - j * 76) / 255);
}
pixels.show();
kitt_offset++;
}
// Start K.I.T.T. led effect. Red color as default.
// Simulate a moving LED with tail. First LED starts at 0, and moves along a triangular function. The tail follows, with decreasing brightness.
// Takes approximately 1s for each direction.
void showKITTWheel(uint32_t color, uint16_t duration_s) {
pixels.setBrightness(config::max_brightness);
for (int i = 0; i < duration_s * config::led_count; ++i) {
showWaitingLED(color);
}
}
/*
* For a given CO2 level and ledId, which brightness should be displayed? 0 for off, 255 for on. Something in-between for partial LED.
* For example, for 1500ppm, every LED between 0 and 7 (500 -> 1400ppm) should be on, LED at 8 (1600ppm) should be half-on.
*/
uint8_t getLedBrightness(uint16_t co2, int ledId) {
if (co2 >= config::co2_ticks[ledId + 1]) {
return 255;
} else {
if (2 * co2 >= config::co2_ticks[ledId] + config::co2_ticks[ledId + 1]) {
// Show partial LED if co2 more than halfway between ticks.
return 27; // Brightness isn't linear, so 27 / 255 looks much brighter than 10%
} else {
// LED off because co2 below previous tick
return 0;
}
}
}
/**
* If enabled, slowly varies the brightness between MAX_BRIGHTNESS & MIN_BRIGHTNESS.
*/
void breathe(int16_t co2) {
static uint8_t breathing_offset = 0;
uint8_t brightness_amplitude = config::max_brightness - config::min_brightness;
uint16_t brightness = config::min_brightness + pixels.sine8(breathing_offset) * brightness_amplitude / 255;
pixels.setBrightness(brightness);
pixels.show();
breathing_offset += co2 > config::poor_air_quality_ppm ? 6 : 3; // breathing speed. +3 looks like slow human breathing.
}
/**
* Fills the whole ring with green, yellow, orange or black, depending on co2 input and CO2_TICKS.
*/
void displayCO2color(uint16_t co2) {
if (!config::display_led) {
return;
}
pixels.setBrightness(config::max_brightness);
for (int ledId = 0; ledId < config::led_count; ++ledId) {
uint8_t brightness = getLedBrightness(co2, ledId);
pixels.setPixelColor(ledId, pixels.ColorHSV(config::led_hues[ledId], 255, brightness));
}
pixels.show();
if (config::max_brightness > config::min_brightness) {
breathe(co2);
}
}
void showRainbowWheel(uint16_t duration_ms) {
if (!config::display_led) {
return;
}
static uint16_t wheel_offset = 0;
static uint16_t sine_offset = 0;
unsigned long t0 = millis();
pixels.setBrightness(config::max_brightness);
while (millis() - t0 < duration_ms) {
for (int i = 0; i < config::led_count; i++) {
pixels.setPixelColor(i, pixels.ColorHSV(i * 65535 / config::led_count + wheel_offset));
wheel_offset += (pixels.sine8(sine_offset++ / 50) - 127) / 2;
}
pixels.show();
delay(10);
}
}
void alert(uint32_t color) {
if (!config::display_led) {
onBoardLEDOn();
delay(500);
onBoardLEDOff();
delay(500);
return;
}
for (int i = 0; i < 10; i++) {
pixels.setBrightness(static_cast<int>(config::max_brightness * (1 - i * 0.1)));
delay(50);
pixels.fill(color);
pixels.show();
}
}
/**
* Displays a complete blue circle, and starts removing LEDs one by one.
* Does nothing in night mode and returns false then. Returns true if
* the countdown has finished. Can be used for calibration, e.g. when countdown is 0.
* NOTE: This function is blocking and returns only after the button has
* been released or after every LED has been turned off.
*/
bool countdownToZero() {
if (!config::display_led) {
Serial.println(F("Night mode. Not doing anything."));
delay(1000); // Wait for a while, to avoid coming back to this function too many times when button is pressed.
return false;
}
pixels.fill(color::blue);
pixels.show();
int countdown;
for (countdown = config::led_count; countdown >= 0 && !digitalRead(0); countdown--) {
pixels.setPixelColor(countdown, color::black);
pixels.show();
Serial.println(countdown);
delay(500);
}
return countdown < 0;
}
}
ampel-firmware/led_effects.h deleted 100644 → 0
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#ifndef LED_EFFECTS_H_INCLUDED
#define LED_EFFECTS_H_INCLUDED
#include <stdint.h> // For uint32_t
namespace color {
const uint32_t red = 0xFF0000;
const uint32_t green = 0x00FF00;
const uint32_t blue = 0x0000FF;
const uint32_t black = 0x000000;
const uint32_t magenta = 0xFF00FF;
}
namespace led_effects {
void setupOnBoardLED();
void onBoardLEDOff();
void onBoardLEDOn();
void toggleNightMode();
void turnLEDsOnOff(int32_t);
void LEDsOff();
void setupRing();
void alert(uint32_t color);
bool countdownToZero();
void showWaitingLED(uint32_t color);
void showKITTWheel(uint32_t color, uint16_t duration_s = 2);
void showRainbowWheel(uint16_t duration_ms = 1000);
void displayCO2color(uint16_t co2);
}
#endif
ampel-firmware/lorawan.cpp deleted 100644 → 0
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#include "lorawan.h"
#if defined(ESP32)
#include "web_config.h"
#include "led_effects.h"
#include "sensor_console.h"
#include "util.h"
#include "ntp.h"
// Requires "MCCI LoRaWAN LMIC library", which will be automatically used with PlatformIO but should be added in "Arduino IDE"
// Tested successfully with v3.2.0 and connected to a thethingsnetwork.org app.
#include <lmic.h>
#include <SPI.h>
#include <hal/hal.h>
#include <arduino_lmic_hal_boards.h>
namespace config {
#if defined(CFG_eu868)
const char *lorawan_frequency_plan = "Europe 868";
#elif defined(CFG_us915)
const char *lorawan_frequency_plan = "US 915";
#elif defined(CFG_au915)
const char *lorawan_frequency_plan = "Australia 915";
#elif defined(CFG_as923)
const char *lorawan_frequency_plan = "Asia 923";
#elif defined(CFG_kr920)
const char *lorawan_frequency_plan = "Korea 920";
#elif defined(CFG_in866)
const char *lorawan_frequency_plan = "India 866";
#else
# error "Region should be specified"
#endif
}
// Payloads will be automatically sent via MQTT by TheThingsNetwork, and can be seen with:
// mosquitto_sub -h eu.thethings.network -t '+/devices/+/up' -u 'APPLICATION-NAME' -P 'ttn-account-v2.4xxxxxxxx-xxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxx' -v
// or encrypted:
// mosquitto_sub -h eu.thethings.network -t '+/devices/+/up' -u 'APPLICATION-NAME' -P 'ttn-account-v2.4xxxxxxxx-xxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxx' -v --cafile mqtt-ca.pem -p 8883
// ->
// co2ampel-test/devices/esp3a7c94/up {"app_id":"co2ampel-test","dev_id":"esp3a7c94","hardware_serial":"00xxxxxxxx","port":1,"counter":5,"payload_raw":"TJd7","payload_fields":{"co2":760,"rh":61.5,"temp":20.2},"metadata":{"time":"2020-12-23T23:00:51.44020438Z","frequency":867.5,"modulation":"LORA","data_rate":"SF7BW125","airtime":51456000,"coding_rate":"4/5","gateways":[{"gtw_id":"eui-xxxxxxxxxxxxxxxxxx","timestamp":1765406908,"time":"2020-12-23T23:00:51.402519Z","channel":5,"rssi":-64,"snr":7.5,"rf_chain":0,"latitude":22.7,"longitude":114.24,"altitude":450}]}}
// More info : https://www.thethingsnetwork.org/docs/applications/mqtt/quick-start.html
namespace lorawan {
bool waiting_for_confirmation = false;
bool connected = false;
char last_transmission[23] = "";
void initialize() {
Serial.print(F("Starting LoRaWAN. Frequency plan : "));
Serial.print(config::lorawan_frequency_plan);
Serial.println(F(" MHz."));
// More info about pin mapping : https://github.com/mcci-catena/arduino-lmic#pin-mapping
// Has been tested successfully with ESP32 TTGO LoRa32 V1, and might work with other ESP32+LoRa boards.
const lmic_pinmap *pPinMap = Arduino_LMIC::GetPinmap_ThisBoard();
// LMIC init.
os_init_ex(pPinMap);
// Reset the MAC state. Session and pending data transfers will be discarded.
LMIC_reset();
// Join, but don't send anything yet.
LMIC_startJoining();
sensor_console::defineIntCommand("lora", setLoRaInterval, F("300 (Sets LoRaWAN sending interval, in s)"));
}
// Checks if OTAA is connected, or if payload should be sent.
// NOTE: while a transaction is in process (i.e. until the TXcomplete event has been received), no blocking code (e.g. delay loops etc.) are allowed, otherwise the LMIC/OS code might miss the event.
// If this rule is not followed, a typical symptom is that the first send is ok and all following ones end with the 'TX not complete' failure.
void process() {
os_runloop_once();
}
void printHex2(unsigned v) {
v &= 0xff;
if (v < 16)
Serial.print('0');
Serial.print(v, HEX);
}
void onEvent(ev_t ev) {
char current_time[23];
ntp::getLocalTime(current_time);
Serial.print(F("LoRa - "));
Serial.print(current_time);
Serial.print(F(" - "));
switch (ev) {
case EV_JOINING:
Serial.println(F("EV_JOINING"));
break;
case EV_JOINED:
waiting_for_confirmation = false;
connected = true;
led_effects::onBoardLEDOff();
Serial.println(F("EV_JOINED"));
{
u4_t netid = 0;
devaddr_t devaddr = 0;
u1_t nwkKey[16];
u1_t artKey[16];
LMIC_getSessionKeys(&netid, &devaddr, nwkKey, artKey);
//NOTE: Saving session to EEPROM seems like a good idea at first, but unfortunately: too much info is needed, and a counter would need to be save every single time data is sent.
Serial.print(F(" netid: "));
Serial.println(netid, DEC);
Serial.print(F(" devaddr: "));
Serial.println(devaddr, HEX);
Serial.print(F(" AppSKey: "));
for (size_t i = 0; i < sizeof(artKey); ++i) {
if (i != 0)
Serial.print("-");
printHex2(artKey[i]);
}
Serial.println();
Serial.print(F(" NwkSKey: "));
for (size_t i = 0; i < sizeof(nwkKey); ++i) {
if (i != 0)
Serial.print("-");
printHex2(nwkKey[i]);
}
Serial.println();
}
Serial.println(F("Other services may resume, and will not be frozen anymore."));
// Disable link check validation (automatically enabled during join)
LMIC_setLinkCheckMode(0);
break;
case EV_JOIN_FAILED:
Serial.println(F("EV_JOIN_FAILED"));
break;
case EV_REJOIN_FAILED:
Serial.println(F("EV_REJOIN_FAILED"));
break;
case EV_TXCOMPLETE:
ntp::getLocalTime(last_transmission);
Serial.println(F("EV_TXCOMPLETE"));
break;
case EV_TXSTART:
waiting_for_confirmation = !connected;
Serial.println(F("EV_TXSTART"));
break;
case EV_TXCANCELED:
waiting_for_confirmation = false;
led_effects::onBoardLEDOff();
Serial.println(F("EV_TXCANCELED"));
break;
case EV_JOIN_TXCOMPLETE:
waiting_for_confirmation = false;
led_effects::onBoardLEDOff();
Serial.println(F("EV_JOIN_TXCOMPLETE: no JoinAccept."));
Serial.println(F("Other services may resume."));
break;
default:
Serial.print(F("LoRa event: "));
Serial.println((unsigned) ev);
break;
}
if (waiting_for_confirmation) {
led_effects::onBoardLEDOn();
Serial.println(F("LoRa - waiting for OTAA confirmation. Freezing every other service!"));
}
}
void preparePayload(int16_t co2, float temperature, float humidity) {
// Check if there is not a current TX/RX job running
if (LMIC.opmode & OP_TXRXPEND) {
Serial.println(F("OP_TXRXPEND, not sending"));
} else {
uint8_t buff[3];
// Mapping CO2 from 0ppm to 5100ppm to [0, 255], with 20ppm increments.
buff[0] = (util::min(util::max(co2, 0), 5100) + 10) / 20;
// Mapping temperatures from [-10°C, 41°C] to [0, 255], with 0.2°C increment
buff[1] = static_cast<uint8_t>((util::min(util::max(temperature, -10), 41) + 10.1f) * 5);
// Mapping humidity from [0%, 100%] to [0, 200], with 0.5°C increment (0.4°C would also be possible)
buff[2] = static_cast<uint8_t>(util::min(util::max(humidity, 0) + 0.25f, 100) * 2);
Serial.print(F("LoRa - Payload : '"));
printHex2(buff[0]);
Serial.print(" ");
printHex2(buff[1]);
Serial.print(" ");
printHex2(buff[2]);
Serial.print(F("', "));
Serial.print(buff[0] * 20);
Serial.print(F(" ppm, "));
Serial.print(buff[1] * 0.2 - 10);
Serial.print(F(" °C, "));
Serial.print(buff[2] * 0.5);
Serial.println(F(" %."));
// Prepare upstream data transmission at the next possible time.
LMIC_setTxData2(1, buff, sizeof(buff), 0);
//NOTE: To decode in TheThingsNetwork:
// function decodeUplink(input) {
// return {
// data: {
// co2: input.bytes[0] * 20,
// temp: input.bytes[1] / 5.0 - 10,
// rh: input.bytes[2] / 2.0
// },
// warnings: [],
// errors: []
// };
// }
}
}
void preparePayloadIfTimeHasCome(const int16_t &co2, const float &temperature, const float &humidity) {
static unsigned long last_sent_at = 0;
unsigned long now = seconds();
if (connected && (now - last_sent_at > config::lorawan_sending_interval)) {
last_sent_at = now;
preparePayload(co2, temperature, humidity);
}
}
/*****************************************************************
* Callbacks for sensor commands *
*****************************************************************/
void setLoRaInterval(int32_t sending_interval) {
config::lorawan_sending_interval = sending_interval;
Serial.print(F("Setting LoRa sending interval to : "));
Serial.print(config::lorawan_sending_interval);
Serial.println("s.");
led_effects::showKITTWheel(color::green, 1);
}
}
void onEvent(ev_t ev) {
lorawan::onEvent(ev);
}
// 'A' -> 10, 'F' -> 15, 'f' -> 15, 'z' -> -1
int8_t hexCharToInt(char c) {
int8_t v = -1;
if ((c >= '0') && (c <= '9')) {
v = (c - '0');
} else if ((c >= 'A') && (c <= 'F')) {
v = (c - 'A' + 10);
} else if ((c >= 'a') && (c <= 'f')) {
v = (c - 'a' + 10);
}
return v;
}
/**
* Parses hex string and saves the corresponding bytes in buf.
* msb is true for most-significant-byte, false for least-significant-byte.
*
* "112233" will be loaded into {0x11, 0x22, 0x33} in MSB, {0x33, 0x22, 0x11} in LSB.
*/
void hexStringToByteArray(uint8_t *buf, const char *hex, uint max_n, bool msb) {
int n = util::min(strlen(hex) / 2, max_n);
for (int i = 0; i < n; i++) {
int j;
if (msb) {
j = i;
} else {
j = n - 1 - i;
}
uint8_t r = hexCharToInt(hex[j * 2]) * 16 + hexCharToInt(hex[j * 2 + 1]);
buf[i] = r;
}
}
// Load config into LMIC byte arrays.
void os_getArtEui(u1_t *buf) {
hexStringToByteArray(buf, config::lorawan_app_eui, 8, false);
}
void os_getDevEui(u1_t *buf) {
hexStringToByteArray(buf, config::lorawan_device_eui, 8, false);
}
void os_getDevKey(u1_t *buf) {
hexStringToByteArray(buf, config::lorawan_app_key, 16, true);
}
#endif
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#ifndef AMPEL_LORAWAN_H_
#define AMPEL_LORAWAN_H_
# if defined(ESP32)
#include <stdint.h> // For uint32_t & uint16_t
namespace config {
extern const char *lorawan_frequency_plan; // e.g. "Europe 868"
}
namespace lorawan {
extern bool waiting_for_confirmation;
extern bool connected;
extern char last_transmission[];
void initialize();
void process();
void preparePayloadIfTimeHasCome(const int16_t &co2, const float &temp, const float &hum);
void setLoRaInterval(int32_t sending_interval);
}
# endif
#endif
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#include "mqtt.h"
#include "web_config.h"
#include "led_effects.h"
#include "sensor_console.h"
#include "wifi_util.h"
#include "ntp.h"
#include "src/lib/PubSubClient/src/PubSubClient.h"
#if defined(ESP8266)
# include <ESP8266WiFi.h>
#elif defined(ESP32)
# include <WiFi.h>
#endif
namespace config {
// Values should be defined in config.h or over webconfig
//INFO: Listen to every CO2 sensor which is connected to the server:
// mosquitto_sub -h MQTT_SERVER -t 'CO2sensors/#' -p 443 --capath /etc/ssl/certs/ -u "MQTT_USER" -P "MQTT_PASSWORD" -v
const unsigned long wait_after_fail = 900; // [s] Wait 15 minutes after an MQTT connection fail, before trying again.
}
#if defined(ESP32)
# include <WiFiClientSecure.h>
#endif
WiFiClient *espClient;
PubSubClient mqttClient;
namespace mqtt {
unsigned long last_sent_at = 0;
unsigned long last_failed_at = 0;
bool connected = false;
char publish_topic[42]; // "MQTT_TOPIC_PREFIX/ESPxxxxxx\0", e.g. "CO2sensors/ESPxxxxxx\0"
const char *json_sensor_format;
char last_successful_publish[23] = "";
void initialize(const char *sensorId) {
json_sensor_format = PSTR("{\"time\":\"%s\", \"co2\":%d, \"temp\":%.1f, \"rh\":%.1f}");
snprintf(publish_topic, sizeof(publish_topic), "%s%s", config::mqtt_topic_prefix, sensorId);
if (config::mqtt_encryption) {
// The sensor doesn't check the fingerprint of the MQTT broker, because otherwise this fingerprint should be updated
// on the sensor every 3 months. The connection can still be encrypted, though:
WiFiClientSecure *secureClient = new WiFiClientSecure();
secureClient->setInsecure();
espClient = secureClient;
} else {
espClient = new WiFiClient();
}
mqttClient.setClient(*espClient);
mqttClient.setServer(config::mqtt_server, config::mqtt_port);
sensor_console::defineIntCommand("mqtt", setMQTTinterval, F("60 (Sets MQTT sending interval, in s)"));
sensor_console::defineCommand("send_local_ip", sendInfoAboutLocalNetwork,
F("(Sends local IP and SSID via MQTT. Can be useful to find sensor)"));
}
void publish(const char *timestamp, int16_t co2, float temperature, float humidity) {
if (wifi::connected() && mqttClient.connected()) {
led_effects::onBoardLEDOn();
Serial.print(F("MQTT - Publishing message to '"));
Serial.print(publish_topic);
Serial.print(F("' ... "));
char payload[75]; // Should be enough for json...
snprintf(payload, sizeof(payload), json_sensor_format, timestamp, co2, temperature, humidity);
// Topic is 'MQTT_TOPIC_PREFIX/ESP123456'
if (mqttClient.publish(publish_topic, payload)) {
Serial.println(F("OK"));
ntp::getLocalTime(last_successful_publish);
} else {
Serial.println(F("Failed."));
}
led_effects::onBoardLEDOff();
}
}
/**
* Allows sensor to be controlled by commands over MQTT
*
* mosquitto_pub -h MQTT_SERVER -t 'CO2sensors/SENSOR_ID/control' -p 443 --capath /etc/ssl/certs/ -u "MQTT_USER" -P "MQTT_PASSWORD" -m "reset"
* mosquitto_pub -h MQTT_SERVER -t 'CO2sensors/SENSOR_ID/control' -p 443 --capath /etc/ssl/certs/ -u "MQTT_USER" -P "MQTT_PASSWORD" -m "timer 30"
* mosquitto_pub -h MQTT_SERVER -t 'CO2sensors/SENSOR_ID/control' -p 443 --capath /etc/ssl/certs/ -u "MQTT_USER" -P "MQTT_PASSWORD" -m "mqtt 900"
* mosquitto_pub -h MQTT_SERVER -t 'CO2sensors/SENSOR_ID/control' -p 443 --capath /etc/ssl/certs/ -u "MQTT_USER" -P "MQTT_PASSWORD" -m "calibrate 700"
*/
void controlSensorCallback(char *sub_topic, byte *message, unsigned int length) {
if (length == 0) {
return;
}
led_effects::onBoardLEDOn();
Serial.print(F("Message arrived on topic: "));
Serial.println(sub_topic);
char command[length + 1];
for (unsigned int i = 0; i < length; i++) {
command[i] = message[i];
}
command[length] = 0;
sensor_console::execute(command);
led_effects::onBoardLEDOff();
}
void reconnect() {
if (last_failed_at > 0 && (seconds() - last_failed_at < config::wait_after_fail)) {
// It failed less than wait_after_fail ago. Not even trying.
return;
}
if (!wifi::connected()) { //NOTE: Sadly, WiFi.status is sometimes WL_CONNECTED even though it's really not
// No WIFI
return;
}
Serial.print(F("MQTT - Attempting connection to "));
Serial.print(config::mqtt_server);
Serial.print(config::mqtt_encryption ? F(" (Encrypted") : F(" (Unencrypted"));
Serial.print(F(", port "));
Serial.print(config::mqtt_port);
Serial.print(F(") "));
Serial.print(F("User:'"));
Serial.print(config::mqtt_user);
Serial.print(F("' ..."));
led_effects::onBoardLEDOn();
// Wait for connection, at most 15s (default)
mqttClient.connect(publish_topic, config::mqtt_user, config::mqtt_password);
led_effects::onBoardLEDOff();
connected = mqttClient.connected();
if (connected) {
if (config::allow_mqtt_commands) {
char control_topic[50]; // Should be enough for "MQTT_TOPIC_PREFIX/ESPd03cc5/control\0"
snprintf(control_topic, sizeof(control_topic), "%s/control", publish_topic);
mqttClient.subscribe(control_topic);
mqttClient.setCallback(controlSensorCallback);
}
Serial.println(F(" Connected."));
last_failed_at = 0;
} else {
// As defined in PubSubClient, between -4 and 5
const __FlashStringHelper *mqtt_statuses[] = { F("Connection timeout"), F("Connection lost"), F(
"Connection failed"), F("Disconnected"), F("Connected"), F("Bad protocol"), F("Bad client ID"), F(
"Unavailable"), F("Bad credentials"), F("Unauthorized") };
last_failed_at = seconds();
Serial.print(mqtt_statuses[mqttClient.state() + 4]);
Serial.print("! (Code=");
Serial.print(mqttClient.state());
Serial.print(F("). Will try again in "));
Serial.print(config::wait_after_fail);
Serial.println("s.");
}
}
void publishIfTimeHasCome(const char *timestamp, const int16_t &co2, const float &temp, const float &hum) {
// Send message via MQTT according to sending interval
unsigned long now = seconds();
if (now - last_sent_at > config::mqtt_sending_interval) {
last_sent_at = now;
publish(timestamp, co2, temp, hum);
}
}
void keepConnection() {
// Keep MQTT connection
if (!mqttClient.connected()) {
reconnect();
}
mqttClient.loop();
}
/*****************************************************************
* Callbacks for sensor commands *
*****************************************************************/
void setMQTTinterval(int32_t sending_interval) {
config::mqtt_sending_interval = sending_interval;
Serial.print(F("Setting MQTT sending interval to : "));
Serial.print(config::mqtt_sending_interval);
Serial.println(F("s."));
led_effects::showKITTWheel(color::green, 1);
}
// It can be hard to find the local IP of a sensor if it isn't connected to Serial port, and if mDNS is disabled.
// If the sensor can be reach by MQTT, it can answer with info about local_ip and ssid.
// The sensor will send the info to "CO2sensors/ESP123456/info".
void sendInfoAboutLocalNetwork() {
char info_topic[50]; // Should be enough for "MQTT_TOPIC_PREFIX/ESP123456/info"
snprintf(info_topic, sizeof(info_topic), "%s/info", publish_topic);
char payload[75]; // Should be enough for info json...
const char *json_info_format = PSTR("{\"local_ip\":\"%s\", \"ssid\":\"%s\"}");
snprintf(payload, sizeof(payload), json_info_format, wifi::local_ip, config::selected_ssid());
mqttClient.publish(info_topic, payload);
}
}
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#ifndef MQTT_H_INCLUDED
#define MQTT_H_INCLUDED
#include <stdint.h> // For uint32_t & uint16_t
namespace mqtt {
extern char last_successful_publish[];
extern bool connected;
void initialize(const char *sensorId);
void keepConnection();
void publishIfTimeHasCome(const char *timestamp, const int16_t &co2, const float &temp, const float &hum);
void setMQTTinterval(int32_t sending_interval);
void sendInfoAboutLocalNetwork();
}
#endif
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#include "ntp.h"
#include "sensor_console.h"
#include "web_config.h"
#include <WiFiUdp.h> // required for NTP
#include "src/lib/NTPClient/NTPClient.h" // NTP
//NOTE: ESP32 sometimes couldn't access the NTP server, and every loop would take +1000ms
// ifdefs could be used to define functions specific to ESP32, e.g. with configTime
namespace ntp {
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);
bool connected_at_least_once = false;
void setLocalTime(int32_t unix_seconds);
// Should be defined, even offline
void initialize() {
timeClient.setTimeOffset((config::time_zone + config::daylight_saving_time) * 3600);
sensor_console::defineIntCommand("set_time", ntp::setLocalTime, F("1618829570 (Sets time to the given UNIX time)"));
}
void connect(){
timeClient.setPoolServerName(config::ntp_server);
timeClient.setUpdateInterval(60000UL);
Serial.print("NTP - Trying to connect to : ");
Serial.println(config::ntp_server);
timeClient.begin();
}
void update() {
connected_at_least_once |= timeClient.update();
}
void getLocalTime(char *timestamp) {
timeClient.getFormattedDate(timestamp);
}
void setLocalTime(int32_t unix_seconds) {
char time[23];
timeClient.getFormattedDate(time);
Serial.print(F("Current time : "));
Serial.println(time);
if (connected_at_least_once) {
Serial.println(F("NTP update already happened. Not changing anything."));
return;
}
Serial.print(F("Setting UNIX time to : "));
Serial.println(unix_seconds);
timeClient.setEpochTime(unix_seconds - seconds());
timeClient.getFormattedDate(time);
Serial.print(F("Current time : "));
Serial.println(time);
}
}
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#ifndef AMPEL_TIME_H_INCLUDED
#define AMPEL_TIME_H_INCLUDED
namespace ntp {
extern bool connected_at_least_once;
void initialize();
void connect();
void update();
void getLocalTime(char *timestamp);
}
//NOTE: Only use seconds() for duration comparison, not timestamps comparison. Otherwise, problems happen when millis roll over.
#define seconds() (millis() / 1000UL)
#endif
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/*!
* @file Adafruit_NeoPixel.h
*
* This is part of Adafruit's NeoPixel library for the Arduino platform,
* allowing a broad range of microcontroller boards (most AVR boards,
* many ARM devices, ESP8266 and ESP32, among others) to control Adafruit
* NeoPixels, FLORA RGB Smart Pixels and compatible devices -- WS2811,
* WS2812, WS2812B, SK6812, etc.
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit and open-source hardware by purchasing products
* from Adafruit!
*
* Written by Phil "Paint Your Dragon" Burgess for Adafruit Industries,
* with contributions by PJRC, Michael Miller and other members of the
* open source community.
*
* This file is part of the Adafruit_NeoPixel library.
*
* Adafruit_NeoPixel is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Adafruit_NeoPixel is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with NeoPixel. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef ADAFRUIT_NEOPIXEL_H
#define ADAFRUIT_NEOPIXEL_H
#ifdef ARDUINO
#if (ARDUINO >= 100)
#include <Arduino.h>
#else
#include <WProgram.h>
#include <pins_arduino.h>
#endif
#ifdef USE_TINYUSB // For Serial when selecting TinyUSB
#include <Adafruit_TinyUSB.h>
#endif
#endif
#ifdef TARGET_LPC1768
#include <Arduino.h>
#endif
#if defined(ARDUINO_ARCH_RP2040)
#include <stdlib.h>
#include "hardware/pio.h"
#include "hardware/clocks.h"
#include "rp2040_pio.h"
#endif
// The order of primary colors in the NeoPixel data stream can vary among
// device types, manufacturers and even different revisions of the same
// item. The third parameter to the Adafruit_NeoPixel constructor encodes
// the per-pixel byte offsets of the red, green and blue primaries (plus
// white, if present) in the data stream -- the following #defines provide
// an easier-to-use named version for each permutation. e.g. NEO_GRB
// indicates a NeoPixel-compatible device expecting three bytes per pixel,
// with the first byte transmitted containing the green value, second
// containing red and third containing blue. The in-memory representation
// of a chain of NeoPixels is the same as the data-stream order; no
// re-ordering of bytes is required when issuing data to the chain.
// Most of these values won't exist in real-world devices, but it's done
// this way so we're ready for it (also, if using the WS2811 driver IC,
// one might have their pixels set up in any weird permutation).
// Bits 5,4 of this value are the offset (0-3) from the first byte of a
// pixel to the location of the red color byte. Bits 3,2 are the green
// offset and 1,0 are the blue offset. If it is an RGBW-type device
// (supporting a white primary in addition to R,G,B), bits 7,6 are the
// offset to the white byte...otherwise, bits 7,6 are set to the same value
// as 5,4 (red) to indicate an RGB (not RGBW) device.
// i.e. binary representation:
// 0bWWRRGGBB for RGBW devices
// 0bRRRRGGBB for RGB
// RGB NeoPixel permutations; white and red offsets are always same
// Offset: W R G B
#define NEO_RGB ((0 << 6) | (0 << 4) | (1 << 2) | (2)) ///< Transmit as R,G,B
#define NEO_RBG ((0 << 6) | (0 << 4) | (2 << 2) | (1)) ///< Transmit as R,B,G
#define NEO_GRB ((1 << 6) | (1 << 4) | (0 << 2) | (2)) ///< Transmit as G,R,B
#define NEO_GBR ((2 << 6) | (2 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,R
#define NEO_BRG ((1 << 6) | (1 << 4) | (2 << 2) | (0)) ///< Transmit as B,R,G
#define NEO_BGR ((2 << 6) | (2 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,R
// RGBW NeoPixel permutations; all 4 offsets are distinct
// Offset: W R G B
#define NEO_WRGB ((0 << 6) | (1 << 4) | (2 << 2) | (3)) ///< Transmit as W,R,G,B
#define NEO_WRBG ((0 << 6) | (1 << 4) | (3 << 2) | (2)) ///< Transmit as W,R,B,G
#define NEO_WGRB ((0 << 6) | (2 << 4) | (1 << 2) | (3)) ///< Transmit as W,G,R,B
#define NEO_WGBR ((0 << 6) | (3 << 4) | (1 << 2) | (2)) ///< Transmit as W,G,B,R
#define NEO_WBRG ((0 << 6) | (2 << 4) | (3 << 2) | (1)) ///< Transmit as W,B,R,G
#define NEO_WBGR ((0 << 6) | (3 << 4) | (2 << 2) | (1)) ///< Transmit as W,B,G,R
#define NEO_RWGB ((1 << 6) | (0 << 4) | (2 << 2) | (3)) ///< Transmit as R,W,G,B
#define NEO_RWBG ((1 << 6) | (0 << 4) | (3 << 2) | (2)) ///< Transmit as R,W,B,G
#define NEO_RGWB ((2 << 6) | (0 << 4) | (1 << 2) | (3)) ///< Transmit as R,G,W,B
#define NEO_RGBW ((3 << 6) | (0 << 4) | (1 << 2) | (2)) ///< Transmit as R,G,B,W
#define NEO_RBWG ((2 << 6) | (0 << 4) | (3 << 2) | (1)) ///< Transmit as R,B,W,G
#define NEO_RBGW ((3 << 6) | (0 << 4) | (2 << 2) | (1)) ///< Transmit as R,B,G,W
#define NEO_GWRB ((1 << 6) | (2 << 4) | (0 << 2) | (3)) ///< Transmit as G,W,R,B
#define NEO_GWBR ((1 << 6) | (3 << 4) | (0 << 2) | (2)) ///< Transmit as G,W,B,R
#define NEO_GRWB ((2 << 6) | (1 << 4) | (0 << 2) | (3)) ///< Transmit as G,R,W,B
#define NEO_GRBW ((3 << 6) | (1 << 4) | (0 << 2) | (2)) ///< Transmit as G,R,B,W
#define NEO_GBWR ((2 << 6) | (3 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,W,R
#define NEO_GBRW ((3 << 6) | (2 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,R,W
#define NEO_BWRG ((1 << 6) | (2 << 4) | (3 << 2) | (0)) ///< Transmit as B,W,R,G
#define NEO_BWGR ((1 << 6) | (3 << 4) | (2 << 2) | (0)) ///< Transmit as B,W,G,R
#define NEO_BRWG ((2 << 6) | (1 << 4) | (3 << 2) | (0)) ///< Transmit as B,R,W,G
#define NEO_BRGW ((3 << 6) | (1 << 4) | (2 << 2) | (0)) ///< Transmit as B,R,G,W
#define NEO_BGWR ((2 << 6) | (3 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,W,R
#define NEO_BGRW ((3 << 6) | (2 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,R,W
// Add NEO_KHZ400 to the color order value to indicate a 400 KHz device.
// All but the earliest v1 NeoPixels expect an 800 KHz data stream, this is
// the default if unspecified. Because flash space is very limited on ATtiny
// devices (e.g. Trinket, Gemma), v1 NeoPixels aren't handled by default on
// those chips, though it can be enabled by removing the ifndef/endif below,
// but code will be bigger. Conversely, can disable the NEO_KHZ400 line on
// other MCUs to remove v1 support and save a little space.
#define NEO_KHZ800 0x0000 ///< 800 KHz data transmission
#ifndef __AVR_ATtiny85__
#define NEO_KHZ400 0x0100 ///< 400 KHz data transmission
#endif
// If 400 KHz support is enabled, the third parameter to the constructor
// requires a 16-bit value (in order to select 400 vs 800 KHz speed).
// If only 800 KHz is enabled (as is default on ATtiny), an 8-bit value
// is sufficient to encode pixel color order, saving some space.
#ifdef NEO_KHZ400
typedef uint16_t neoPixelType; ///< 3rd arg to Adafruit_NeoPixel constructor
#else
typedef uint8_t neoPixelType; ///< 3rd arg to Adafruit_NeoPixel constructor
#endif
// These two tables are declared outside the Adafruit_NeoPixel class
// because some boards may require oldschool compilers that don't
// handle the C++11 constexpr keyword.
/* A PROGMEM (flash mem) table containing 8-bit unsigned sine wave (0-255).
Copy & paste this snippet into a Python REPL to regenerate:
import math
for x in range(256):
print("{:3},".format(int((math.sin(x/128.0*math.pi)+1.0)*127.5+0.5))),
if x&15 == 15: print
*/
static const uint8_t PROGMEM _NeoPixelSineTable[256] = {
128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 162, 165, 167, 170,
173, 176, 179, 182, 185, 188, 190, 193, 196, 198, 201, 203, 206, 208, 211,
213, 215, 218, 220, 222, 224, 226, 228, 230, 232, 234, 235, 237, 238, 240,
241, 243, 244, 245, 246, 248, 249, 250, 250, 251, 252, 253, 253, 254, 254,
254, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 253, 253, 252, 251,
250, 250, 249, 248, 246, 245, 244, 243, 241, 240, 238, 237, 235, 234, 232,
230, 228, 226, 224, 222, 220, 218, 215, 213, 211, 208, 206, 203, 201, 198,
196, 193, 190, 188, 185, 182, 179, 176, 173, 170, 167, 165, 162, 158, 155,
152, 149, 146, 143, 140, 137, 134, 131, 128, 124, 121, 118, 115, 112, 109,
106, 103, 100, 97, 93, 90, 88, 85, 82, 79, 76, 73, 70, 67, 65,
62, 59, 57, 54, 52, 49, 47, 44, 42, 40, 37, 35, 33, 31, 29,
27, 25, 23, 21, 20, 18, 17, 15, 14, 12, 11, 10, 9, 7, 6,
5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9, 10, 11,
12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35, 37,
40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76,
79, 82, 85, 88, 90, 93, 97, 100, 103, 106, 109, 112, 115, 118, 121,
124};
/* Similar to above, but for an 8-bit gamma-correction table.
Copy & paste this snippet into a Python REPL to regenerate:
import math
gamma=2.6
for x in range(256):
print("{:3},".format(int(math.pow((x)/255.0,gamma)*255.0+0.5))),
if x&15 == 15: print
*/
static const uint8_t PROGMEM _NeoPixelGammaTable[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3,
3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6,
6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17,
17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
25, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 34, 35,
36, 37, 38, 38, 39, 40, 41, 42, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 80, 81,
82, 84, 85, 86, 88, 89, 90, 92, 93, 94, 96, 97, 99, 100, 102,
103, 105, 106, 108, 109, 111, 112, 114, 115, 117, 119, 120, 122, 124, 125,
127, 129, 130, 132, 134, 136, 137, 139, 141, 143, 145, 146, 148, 150, 152,
154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182,
184, 186, 188, 191, 193, 195, 197, 199, 202, 204, 206, 209, 211, 213, 215,
218, 220, 223, 225, 227, 230, 232, 235, 237, 240, 242, 245, 247, 250, 252,
255};
/*!
@brief Class that stores state and functions for interacting with
Adafruit NeoPixels and compatible devices.
*/
class Adafruit_NeoPixel {
public:
// Constructor: number of LEDs, pin number, LED type
Adafruit_NeoPixel(uint16_t n, int16_t pin = 6,
neoPixelType type = NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel(void);
~Adafruit_NeoPixel();
void begin(void);
void show(void);
void setPin(int16_t p);
void setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b);
void setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b, uint8_t w);
void setPixelColor(uint16_t n, uint32_t c);
void fill(uint32_t c = 0, uint16_t first = 0, uint16_t count = 0);
void setBrightness(uint8_t);
void clear(void);
void updateLength(uint16_t n);
void updateType(neoPixelType t);
/*!
@brief Check whether a call to show() will start sending data
immediately or will 'block' for a required interval. NeoPixels
require a short quiet time (about 300 microseconds) after the
last bit is received before the data 'latches' and new data can
start being received. Usually one's sketch is implicitly using
this time to generate a new frame of animation...but if it
finishes very quickly, this function could be used to see if
there's some idle time available for some low-priority
concurrent task.
@return 1 or true if show() will start sending immediately, 0 or false
if show() would block (meaning some idle time is available).
*/
bool canShow(void) {
// It's normal and possible for endTime to exceed micros() if the
// 32-bit clock counter has rolled over (about every 70 minutes).
// Since both are uint32_t, a negative delta correctly maps back to
// positive space, and it would seem like the subtraction below would
// suffice. But a problem arises if code invokes show() very
// infrequently...the micros() counter may roll over MULTIPLE times in
// that interval, the delta calculation is no longer correct and the
// next update may stall for a very long time. The check below resets
// the latch counter if a rollover has occurred. This can cause an
// extra delay of up to 300 microseconds in the rare case where a
// show() call happens precisely around the rollover, but that's
// neither likely nor especially harmful, vs. other code that might
// stall for 30+ minutes, or having to document and frequently remind
// and/or provide tech support explaining an unintuitive need for
// show() calls at least once an hour.
uint32_t now = micros();
if (endTime > now) {
endTime = now;
}
return (now - endTime) >= 300L;
}
/*!
@brief Get a pointer directly to the NeoPixel data buffer in RAM.
Pixel data is stored in a device-native format (a la the NEO_*
constants) and is not translated here. Applications that access
this buffer will need to be aware of the specific data format
and handle colors appropriately.
@return Pointer to NeoPixel buffer (uint8_t* array).
@note This is for high-performance applications where calling
setPixelColor() on every single pixel would be too slow (e.g.
POV or light-painting projects). There is no bounds checking
on the array, creating tremendous potential for mayhem if one
writes past the ends of the buffer. Great power, great
responsibility and all that.
*/
uint8_t *getPixels(void) const { return pixels; };
uint8_t getBrightness(void) const;
/*!
@brief Retrieve the pin number used for NeoPixel data output.
@return Arduino pin number (-1 if not set).
*/
int16_t getPin(void) const { return pin; };
/*!
@brief Return the number of pixels in an Adafruit_NeoPixel strip object.
@return Pixel count (0 if not set).
*/
uint16_t numPixels(void) const { return numLEDs; }
uint32_t getPixelColor(uint16_t n) const;
/*!
@brief An 8-bit integer sine wave function, not directly compatible
with standard trigonometric units like radians or degrees.
@param x Input angle, 0-255; 256 would loop back to zero, completing
the circle (equivalent to 360 degrees or 2 pi radians).
One can therefore use an unsigned 8-bit variable and simply
add or subtract, allowing it to overflow/underflow and it
still does the expected contiguous thing.
@return Sine result, 0 to 255, or -128 to +127 if type-converted to
a signed int8_t, but you'll most likely want unsigned as this
output is often used for pixel brightness in animation effects.
*/
static uint8_t sine8(uint8_t x) {
return pgm_read_byte(&_NeoPixelSineTable[x]); // 0-255 in, 0-255 out
}
/*!
@brief An 8-bit gamma-correction function for basic pixel brightness
adjustment. Makes color transitions appear more perceptially
correct.
@param x Input brightness, 0 (minimum or off/black) to 255 (maximum).
@return Gamma-adjusted brightness, can then be passed to one of the
setPixelColor() functions. This uses a fixed gamma correction
exponent of 2.6, which seems reasonably okay for average
NeoPixels in average tasks. If you need finer control you'll
need to provide your own gamma-correction function instead.
*/
static uint8_t gamma8(uint8_t x) {
return pgm_read_byte(&_NeoPixelGammaTable[x]); // 0-255 in, 0-255 out
}
/*!
@brief Convert separate red, green and blue values into a single
"packed" 32-bit RGB color.
@param r Red brightness, 0 to 255.
@param g Green brightness, 0 to 255.
@param b Blue brightness, 0 to 255.
@return 32-bit packed RGB value, which can then be assigned to a
variable for later use or passed to the setPixelColor()
function. Packed RGB format is predictable, regardless of
LED strand color order.
*/
static uint32_t Color(uint8_t r, uint8_t g, uint8_t b) {
return ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
}
/*!
@brief Convert separate red, green, blue and white values into a
single "packed" 32-bit WRGB color.
@param r Red brightness, 0 to 255.
@param g Green brightness, 0 to 255.
@param b Blue brightness, 0 to 255.
@param w White brightness, 0 to 255.
@return 32-bit packed WRGB value, which can then be assigned to a
variable for later use or passed to the setPixelColor()
function. Packed WRGB format is predictable, regardless of
LED strand color order.
*/
static uint32_t Color(uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
return ((uint32_t)w << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
}
static uint32_t ColorHSV(uint16_t hue, uint8_t sat = 255, uint8_t val = 255);
/*!
@brief A gamma-correction function for 32-bit packed RGB or WRGB
colors. Makes color transitions appear more perceptially
correct.
@param x 32-bit packed RGB or WRGB color.
@return Gamma-adjusted packed color, can then be passed in one of the
setPixelColor() functions. Like gamma8(), this uses a fixed
gamma correction exponent of 2.6, which seems reasonably okay
for average NeoPixels in average tasks. If you need finer
control you'll need to provide your own gamma-correction
function instead.
*/
static uint32_t gamma32(uint32_t x);
void rainbow(uint16_t first_hue = 0, int8_t reps = 1,
uint8_t saturation = 255, uint8_t brightness = 255,
bool gammify = true);
private:
#if defined(ARDUINO_ARCH_RP2040)
void rp2040Init(uint8_t pin, bool is800KHz);
void rp2040Show(uint8_t pin, uint8_t *pixels, uint32_t numBytes, bool is800KHz);
#endif
protected:
#ifdef NEO_KHZ400 // If 400 KHz NeoPixel support enabled...
bool is800KHz; ///< true if 800 KHz pixels
#endif
bool begun; ///< true if begin() previously called
uint16_t numLEDs; ///< Number of RGB LEDs in strip
uint16_t numBytes; ///< Size of 'pixels' buffer below
int16_t pin; ///< Output pin number (-1 if not yet set)
uint8_t brightness; ///< Strip brightness 0-255 (stored as +1)
uint8_t *pixels; ///< Holds LED color values (3 or 4 bytes each)
uint8_t rOffset; ///< Red index within each 3- or 4-byte pixel
uint8_t gOffset; ///< Index of green byte
uint8_t bOffset; ///< Index of blue byte
uint8_t wOffset; ///< Index of white (==rOffset if no white)
uint32_t endTime; ///< Latch timing reference
#ifdef __AVR__
volatile uint8_t *port; ///< Output PORT register
uint8_t pinMask; ///< Output PORT bitmask
#endif
#if defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_ARDUINO_CORE_STM32)
GPIO_TypeDef *gpioPort; ///< Output GPIO PORT
uint32_t gpioPin; ///< Output GPIO PIN
#endif
#if defined(ARDUINO_ARCH_RP2040)
PIO pio = pio0;
int sm = 0;
bool init = true;
#endif
};
#endif // ADAFRUIT_NEOPIXEL_H
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# Contribution Guidelines
This library is the culmination of the expertise of many members of the open source community who have dedicated their time and hard work. The best way to ask for help or propose a new idea is to [create a new issue](https://github.com/adafruit/Adafruit_NeoPixel/issues/new) while creating a Pull Request with your code changes allows you to share your own innovations with the rest of the community.
The following are some guidelines to observe when creating issues or PRs:
- Be friendly; it is important that we can all enjoy a safe space as we are all working on the same project and it is okay for people to have different ideas
- [Use code blocks](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#code); it helps us help you when we can read your code! On that note also refrain from pasting more than 30 lines of code in a post, instead [create a gist](https://gist.github.com/) if you need to share large snippets
- Use reasonable titles; refrain from using overly long or capitalized titles as they are usually annoying and do little to encourage others to help :smile:
- Be detailed; refrain from mentioning code problems without sharing your source code and always give information regarding your board and version of the library
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
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a) under this License, provided that you make a good faith effort to
ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or
b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from
a header file that is part of the Library. You may convey such object
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1) Use a suitable shared library mechanism for linking with the
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e) Provide Installation Information, but only if you would otherwise
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5. Combined Libraries.
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Library side by side in a single library together with other library
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b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.
6. Revised Versions of the GNU Lesser General Public License.
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of the GNU Lesser General Public License from time to time. Such new
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Library as you received it specifies that a certain numbered version
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# Adafruit NeoPixel Library [![Build Status](https://github.com/adafruit/Adafruit_NeoPixel/workflows/Arduino%20Library%20CI/badge.svg)](https://github.com/adafruit/Adafruit_NeoPixel/actions)[![Documentation](https://github.com/adafruit/ci-arduino/blob/master/assets/doxygen_badge.svg)](http://adafruit.github.io/Adafruit_NeoPixel/html/index.html)
Arduino library for controlling single-wire-based LED pixels and strip such as the [Adafruit 60 LED/meter Digital LED strip][strip], the [Adafruit FLORA RGB Smart Pixel][flora], the [Adafruit Breadboard-friendly RGB Smart Pixel][pixel], the [Adafruit NeoPixel Stick][stick], and the [Adafruit NeoPixel Shield][shield].
After downloading, rename folder to 'Adafruit_NeoPixel' and install in Arduino Libraries folder. Restart Arduino IDE, then open File->Sketchbook->Library->Adafruit_NeoPixel->strandtest sketch.
Compatibility notes: Port A is not supported on any AVR processors at this time
[flora]: http://adafruit.com/products/1060
[strip]: http://adafruit.com/products/1138
[pixel]: http://adafruit.com/products/1312
[stick]: http://adafruit.com/products/1426
[shield]: http://adafruit.com/products/1430
---
## Installation
### First Method
![image](https://user-images.githubusercontent.com/36513474/68967967-3e37f480-0803-11ea-91d9-601848c306ee.png)
1. In the Arduino IDE, navigate to Sketch > Include Library > Manage Libraries
1. Then the Library Manager will open and you will find a list of libraries that are already installed or ready for installation.
1. Then search for Neopixel strip using the search bar.
1. Click on the text area and then select the specific version and install it.
### Second Method
1. Navigate to the [Releases page](https://github.com/adafruit/Adafruit_NeoPixel/releases).
1. Download the latest release.
1. Extract the zip file
1. In the Arduino IDE, navigate to Sketch > Include Library > Add .ZIP Library
## Features
- ### Simple to use
Controlling NeoPixels “from scratch” is quite a challenge, so we provide a library letting you focus on the fun and interesting bits.
- ### Give back
The library is free; you don’t have to pay for anything. Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!
- ### Supported Chipsets
We have included code for the following chips - sometimes these break for exciting reasons that we can't control in which case please open an issue!
- AVR ATmega and ATtiny (any 8-bit) - 8 MHz, 12 MHz and 16 MHz
- Teensy 3.x and LC
- Arduino Due
- Arduino 101
- ATSAMD21 (Arduino Zero/M0 and other SAMD21 boards) @ 48 MHz
- ATSAMD51 @ 120 MHz
- Adafruit STM32 Feather @ 120 MHz
- ESP8266 any speed
- ESP32 any speed
- Nordic nRF52 (Adafruit Feather nRF52), nRF51 (micro:bit)
- Infineon XMC1100 BootKit @ 32 MHz
- Infineon XMC1100 2Go @ 32 MHz
- Infineon XMC1300 BootKit @ 32 MHz
- Infineon XMC4700 RelaxKit, XMC4800 RelaxKit, XMC4800 IoT Amazon FreeRTOS Kit @ 144 MHz
Check forks for other architectures not listed here!
- ### GNU Lesser General Public License
Adafruit_NeoPixel is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
## Functions
- begin()
- updateLength()
- updateType()
- show()
- delay_ns()
- setPin()
- setPixelColor()
- fill()
- ColorHSV()
- getPixelColor()
- setBrightness()
- getBrightness()
- clear()
- gamma32()
## Examples
There are many examples implemented in this library. One of the examples is below. You can find other examples [here](https://github.com/adafruit/Adafruit_NeoPixel/tree/master/examples)
### Simple
```Cpp
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 6
#define NUMPIXELS 16
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 500
void setup() {
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
clock_prescale_set(clock_div_1);
#endif
pixels.begin();
}
void loop() {
pixels.clear();
for(int i=0; i<NUMPIXELS; i++) {
pixels.setPixelColor(i, pixels.Color(0, 150, 0));
pixels.show();
delay(DELAYVAL);
}
}
```
## Contributing
If you want to contribute to this project:
- Report bugs and errors
- Ask for enhancements
- Create issues and pull requests
- Tell others about this library
- Contribute new protocols
Please read [CONTRIBUTING.md](https://github.com/adafruit/Adafruit_NeoPixel/blob/master/CONTRIBUTING.md) for details on our code of conduct, and the process for submitting pull requests to us.
### Roadmap
The PRIME DIRECTIVE is to maintain backward compatibility with existing Arduino sketches -- many are hosted elsewhere and don't track changes here, some are in print and can never be changed!
Please don't reformat code for the sake of reformatting code. The resulting large "visual diff" makes it impossible to untangle actual bug fixes from merely rearranged lines. (Exception for first item in wishlist below.)
Things I'd Like To Do But There's No Official Timeline So Please Don't Count On Any Of This Ever Being Canonical:
- For the show() function (with all the delicate pixel timing stuff), break out each architecture into separate source files rather than the current unmaintainable tangle of #ifdef statements!
- Please don't use updateLength() or updateType() in new code. They should not have been implemented this way (use the C++ 'new' operator with the regular constructor instead) and are only sticking around because of the Prime Directive. setPin() is OK for now though, it's a trick we can use to 'recycle' pixel memory across multiple strips.
- In the M0 and M4 code, use the hardware systick counter for bit timing rather than hand-tweaked NOPs (a temporary kludge at the time because I wasn't reading systick correctly). (As of 1.4.2, systick is used on M4 devices and it appears to be overclock-compatible. Not for M0 yet, which is why this item is still here.)
- As currently written, brightness scaling is still a "destructive" operation -- pixel values are altered in RAM and the original value as set can't be accurately read back, only approximated, which has been confusing and frustrating to users. It was done this way at the time because NeoPixel timing is strict, AVR microcontrollers (all we had at the time) are limited, and assembly language is hard. All the 32-bit architectures should have no problem handling nondestructive brightness scaling -- calculating each byte immediately before it's sent out the wire, maintaining the original set value in RAM -- the work just hasn't been done. There's a fair chance even the AVR code could manage it with some intense focus. (The DotStar library achieves nondestructive brightness scaling because it doesn't have to manage data timing so carefully...every architecture, even ATtiny, just takes whatever cycles it needs for the multiply/shift operations.)
## Credits
This library is written by Phil "Paint Your Dragon" Burgess for Adafruit Industries, with contributions by PJRC, Michael Miller and other members of the open source community.
## License
Adafruit_NeoPixel is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Adafruit_NeoPixel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the [GNU Lesser General Public License](https://www.gnu.org/licenses/lgpl-3.0.en.html) for more details.
You should have received a copy of the GNU Lesser General Public License along with NeoPixel. If not, see [this](https://www.gnu.org/licenses/)
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// Implements the RMT peripheral on Espressif SoCs
// Copyright (c) 2020 Lucian Copeland for Adafruit Industries
/* Uses code from Espressif RGB LED Strip demo and drivers
* Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#if defined(ESP32)
#include <Arduino.h>
#include "driver/rmt.h"
#if defined(ESP_IDF_VERSION)
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
#define HAS_ESP_IDF_4
#endif
#endif
// This code is adapted from the ESP-IDF v3.4 RMT "led_strip" example, altered
// to work with the Arduino version of the ESP-IDF (3.2)
#define WS2812_T0H_NS (400)
#define WS2812_T0L_NS (850)
#define WS2812_T1H_NS (800)
#define WS2812_T1L_NS (450)
#define WS2811_T0H_NS (500)
#define WS2811_T0L_NS (2000)
#define WS2811_T1H_NS (1200)
#define WS2811_T1L_NS (1300)
static uint32_t t0h_ticks = 0;
static uint32_t t1h_ticks = 0;
static uint32_t t0l_ticks = 0;
static uint32_t t1l_ticks = 0;
// Limit the number of RMT channels available for the Neopixels. Defaults to all
// channels (8 on ESP32, 4 on ESP32-S2 and S3). Redefining this value will free
// any channels with a higher number for other uses, such as IR send-and-recieve
// libraries. Redefine as 1 to restrict Neopixels to only a single channel.
#define ADAFRUIT_RMT_CHANNEL_MAX RMT_CHANNEL_MAX
#define RMT_LL_HW_BASE (&RMT)
bool rmt_reserved_channels[ADAFRUIT_RMT_CHANNEL_MAX];
static void IRAM_ATTR ws2812_rmt_adapter(const void *src, rmt_item32_t *dest, size_t src_size,
size_t wanted_num, size_t *translated_size, size_t *item_num)
{
if (src == NULL || dest == NULL) {
*translated_size = 0;
*item_num = 0;
return;
}
const rmt_item32_t bit0 = {{{ t0h_ticks, 1, t0l_ticks, 0 }}}; //Logical 0
const rmt_item32_t bit1 = {{{ t1h_ticks, 1, t1l_ticks, 0 }}}; //Logical 1
size_t size = 0;
size_t num = 0;
uint8_t *psrc = (uint8_t *)src;
rmt_item32_t *pdest = dest;
while (size < src_size && num < wanted_num) {
for (int i = 0; i < 8; i++) {
// MSB first
if (*psrc & (1 << (7 - i))) {
pdest->val = bit1.val;
} else {
pdest->val = bit0.val;
}
num++;
pdest++;
}
size++;
psrc++;
}
*translated_size = size;
*item_num = num;
}
void espShow(uint8_t pin, uint8_t *pixels, uint32_t numBytes, boolean is800KHz) {
// Reserve channel
rmt_channel_t channel = ADAFRUIT_RMT_CHANNEL_MAX;
for (size_t i = 0; i < ADAFRUIT_RMT_CHANNEL_MAX; i++) {
if (!rmt_reserved_channels[i]) {
rmt_reserved_channels[i] = true;
channel = i;
break;
}
}
if (channel == ADAFRUIT_RMT_CHANNEL_MAX) {
// Ran out of channels!
return;
}
#if defined(HAS_ESP_IDF_4)
rmt_config_t config = RMT_DEFAULT_CONFIG_TX(pin, channel);
config.clk_div = 2;
#else
// Match default TX config from ESP-IDF version 3.4
rmt_config_t config = {
.rmt_mode = RMT_MODE_TX,
.channel = channel,
.gpio_num = pin,
.clk_div = 2,
.mem_block_num = 1,
.tx_config = {
.carrier_freq_hz = 38000,
.carrier_level = RMT_CARRIER_LEVEL_HIGH,
.idle_level = RMT_IDLE_LEVEL_LOW,
.carrier_duty_percent = 33,
.carrier_en = false,
.loop_en = false,
.idle_output_en = true,
}
};
#endif
rmt_config(&config);
rmt_driver_install(config.channel, 0, 0);
// Convert NS timings to ticks
uint32_t counter_clk_hz = 0;
#if defined(HAS_ESP_IDF_4)
rmt_get_counter_clock(channel, &counter_clk_hz);
#else
// this emulates the rmt_get_counter_clock() function from ESP-IDF 3.4
if (RMT_LL_HW_BASE->conf_ch[config.channel].conf1.ref_always_on == RMT_BASECLK_REF) {
uint32_t div_cnt = RMT_LL_HW_BASE->conf_ch[config.channel].conf0.div_cnt;
uint32_t div = div_cnt == 0 ? 256 : div_cnt;
counter_clk_hz = REF_CLK_FREQ / (div);
} else {
uint32_t div_cnt = RMT_LL_HW_BASE->conf_ch[config.channel].conf0.div_cnt;
uint32_t div = div_cnt == 0 ? 256 : div_cnt;
counter_clk_hz = APB_CLK_FREQ / (div);
}
#endif
// NS to tick converter
float ratio = (float)counter_clk_hz / 1e9;
if (is800KHz) {
t0h_ticks = (uint32_t)(ratio * WS2812_T0H_NS);
t0l_ticks = (uint32_t)(ratio * WS2812_T0L_NS);
t1h_ticks = (uint32_t)(ratio * WS2812_T1H_NS);
t1l_ticks = (uint32_t)(ratio * WS2812_T1L_NS);
} else {
t0h_ticks = (uint32_t)(ratio * WS2811_T0H_NS);
t0l_ticks = (uint32_t)(ratio * WS2811_T0L_NS);
t1h_ticks = (uint32_t)(ratio * WS2811_T1H_NS);
t1l_ticks = (uint32_t)(ratio * WS2811_T1L_NS);
}
// Initialize automatic timing translator
rmt_translator_init(config.channel, ws2812_rmt_adapter);
// Write and wait to finish
rmt_write_sample(config.channel, pixels, (size_t)numBytes, true);
rmt_wait_tx_done(config.channel, pdMS_TO_TICKS(100));
// Free channel again
rmt_driver_uninstall(config.channel);
rmt_reserved_channels[channel] = false;
gpio_set_direction(pin, GPIO_MODE_OUTPUT);
}
#endif
ampel-firmware/src/lib/Adafruit_NeoPixel/esp8266.c deleted 100644 → 0
+ 0
- 86
View file @ 90f80906
// This is a mash-up of the Due show() code + insights from Michael Miller's
// ESP8266 work for the NeoPixelBus library: github.com/Makuna/NeoPixelBus
// Needs to be a separate .c file to enforce ICACHE_RAM_ATTR execution.
#if defined(ESP8266)
#include <Arduino.h>
#ifdef ESP8266
#include <eagle_soc.h>
#endif
static uint32_t _getCycleCount(void) __attribute__((always_inline));
static inline uint32_t _getCycleCount(void) {
uint32_t ccount;
__asm__ __volatile__("rsr %0,ccount":"=a" (ccount));
return ccount;
}
#ifdef ESP8266
IRAM_ATTR void espShow(
uint8_t pin, uint8_t *pixels, uint32_t numBytes, __attribute__((unused)) boolean is800KHz) {
#else
void espShow(
uint8_t pin, uint8_t *pixels, uint32_t numBytes, boolean is800KHz) {
#endif
#define CYCLES_800_T0H (F_CPU / 2500001) // 0.4us
#define CYCLES_800_T1H (F_CPU / 1250001) // 0.8us
#define CYCLES_800 (F_CPU / 800001) // 1.25us per bit
#define CYCLES_400_T0H (F_CPU / 2000000) // 0.5uS
#define CYCLES_400_T1H (F_CPU / 833333) // 1.2us
#define CYCLES_400 (F_CPU / 400000) // 2.5us per bit
uint8_t *p, *end, pix, mask;
uint32_t t, time0, time1, period, c, startTime;
#ifdef ESP8266
uint32_t pinMask;
pinMask = _BV(pin);
#endif
p = pixels;
end = p + numBytes;
pix = *p++;
mask = 0x80;
startTime = 0;
#ifdef NEO_KHZ400
if(is800KHz) {
#endif
time0 = CYCLES_800_T0H;
time1 = CYCLES_800_T1H;
period = CYCLES_800;
#ifdef NEO_KHZ400
} else { // 400 KHz bitstream
time0 = CYCLES_400_T0H;
time1 = CYCLES_400_T1H;
period = CYCLES_400;
}
#endif
for(t = time0;; t = time0) {
if(pix & mask) t = time1; // Bit high duration
while(((c = _getCycleCount()) - startTime) < period); // Wait for bit start
#ifdef ESP8266
GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, pinMask); // Set high
#else
gpio_set_level(pin, HIGH);
#endif
startTime = c; // Save start time
while(((c = _getCycleCount()) - startTime) < t); // Wait high duration
#ifdef ESP8266
GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, pinMask); // Set low
#else
gpio_set_level(pin, LOW);
#endif
if(!(mask >>= 1)) { // Next bit/byte
if(p >= end) break;
pix = *p++;
mask = 0x80;
}
}
while((_getCycleCount() - startTime) < period); // Wait for last bit
}
#endif // ESP8266
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