weatherstation/firmware/firmware.ino

#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>

#include "config.h"

/**
 * Whishlist:
 * - Push sensor values to influxdb
 * - Webserver for /metrics endpoint (Prometheus)
 * - Show current sensor values over simple webpage
 * - Push sensor values to various 3rd party services (https://openweathermap.org/)
 * - MQTT?
 * 
 * - Buffer sensor values if there is no WIFI connection
 * - Configure weather station over http webinterface
 * - OTA firmware update
 * 
 * TODO:
 * - https://sminghub.github.io/Sming/about/ 
 * - https://github.com/marvinroger/homie-esp8266
 */

float currentSensorData[4] = {0.0, 0.0, 0.0, 0.0};


WiFiManager wifiManager;

void setup() { 
  #ifdef DEBUG
    Serial.begin(115200);
  #endif

  // Pin settings
  pinMode(STATUS_LED_PIN, OUTPUT);
  pinMode(ANEMOMETER_PIN, INPUT_PULLUP);

  // Establish  wifi connection
  String wifiName = "oko-weather-" + String(ESP.getChipId());
  wifiManager.setMinimumSignalQuality(15);
  if (!wifiManager.autoConnect(wifiName.c_str(), "DEADBEEF")) {
    #ifdef DEBUG
      Serial.println("WiFi connection failed, we reboot ...");
    #endif
      ESP.reset();
      delay(1000);
  }
  #ifdef DEBUG
    Serial.println("Connected!");
  #endif
}

void loop() {
  digitalWrite(STATUS_LED_PIN, LOW);
  
  currentSensorData[SENSOR_TEMPERATURE] = fetchTemperature();
  currentSensorData[SENSOR_HUMIDITY] = fetchHumidity();
  currentSensorData[SENSOR_LIGHT] = fetchLight();
  currentSensorData[SENSOR_WINDSPEED] = fetchWindspeed();

  #ifdef DEBUG
    Serial.println("");
    Serial.println("Current readings:");
    Serial.println("Temperature: " + String(currentSensorData[SENSOR_TEMPERATURE]) + " °C");
    Serial.println("Humidity: " + String(currentSensorData[SENSOR_HUMIDITY]) + "%");
    Serial.println("Light: " + String(currentSensorData[SENSOR_LIGHT]) + " Lumen");
    Serial.println("Windspeed: " + String(currentSensorData[SENSOR_WINDSPEED]) + " Km/h");
  #endif

  pushToInfluxDB(currentSensorData);
  
  delay(UPDATE_INTERVAL*1000);
}