wifi_util.cpp

#include "wifi_util.h"

#include "web_config.h"
#include "util.h"
#include "ntp.h"
#include "led_effects.h"
#include "sensor_console.h"

#if defined(ESP8266)
#  include <ESP8266WiFi.h>
#elif defined(ESP32)
#  include <WiFi.h>
#endif

namespace wifi {
  char local_ip[16]; // "255.255.255.255\0"

  bool connected() {
    return WiFi.status() == WL_CONNECTED;
  }

  bool isAccessPoint() {
    return WiFi.getMode() == WIFI_AP;
  }

  /*
   * Connection attempt, called in blocking mode by setup(). This way, LED effects can be shown
   * without needing callbacks, but only during wifi_timeout seconds.
   * If connection fails, access point will be started indefinitely, and corresponding
   * LED effects will be shown during 5 seconds.
   *
   * Afterwards, the non-blocking web_config::update() will be called inside loop, and the ampel
   * can display CO2 levels.
   */
  void tryConnection() {
    for (int i = 0; i <= config::wifi_timeout + 5; i++) {
      web_config::update();
      sensor_console::checkSerialInput(); // To allow reset or ssid ... during startup
      if (isAccessPoint()) {
        led_effects::alert(color::turquoise);
      } else if (connected()) {
        break;
      } else {
        led_effects::showRainbowWheel();
      }
      Serial.print(".");
    }
    Serial.println();
  }

  void scanNetworks() {
    Serial.println();
    Serial.println(F("WiFi - Scanning..."));
    bool async = false;
    bool showHidden = true;
    int n = WiFi.scanNetworks(async, showHidden);
    for (int i = 0; i < n; ++i) {
      Serial.print(F("  * '"));
      Serial.print(WiFi.SSID(i));
      Serial.print(F("' ("));
      int16_t quality = 2 * (100 + WiFi.RSSI(i));
      Serial.print(util::min(util::max(quality, 0), 100));
      Serial.println(F(" %)"));
    }
    Serial.println(F("Done!"));
    Serial.println();
  }

  void showLocalIp() {
    Serial.print(F("WiFi - Local IP : "));
    Serial.println(wifi::local_ip);
    Serial.print(F("WiFi - SSID : "));
    Serial.println(config::selected_ssid());
  }

  void defineCommands() {
    sensor_console::defineCommand("wifi_scan", scanNetworks, F("(Scans available WiFi networks)"));
    sensor_console::defineCommand("local_ip", showLocalIp, F("(Displays local IP and current SSID)"));
    //TODO: Add "update!" command? https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266httpUpdate/examples/httpUpdate/httpUpdate.ino
  }
}