config.public.h

#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.
// NOTE: LEDs require a decent amount of electricity, so the default is chosen to be relativitely low.
#  define MAX_BRIGHTNESS 80
// MIN_BRIGHTNESS, must be defined, and should be between 0 and MAX_BRIGHTNESS
// If MIN_BRIGHTNESS is set to MAX_BRIGHTNESS, breathing is disabled.
#  define MIN_BRIGHTNESS 40
// 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