weather-station/vremenska-postaja.ino

#include <Wire.h> 
#include <ArduinoJson.h>
#include <TEWeatherShield.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
static TEWeatherShield weatherShield;

void setup() {
  Serial.begin(9600);
  weatherShield.begin();

  lcd.init();
  lcd.backlight();
  lcd.println("Vremenska postaja");
  lcd.clear();
}

// Print temperature and humidity to LCD
void printLCD(float temperature, float humidity, float pressure) {
    lcd.clear();

    String temp = "T: " + (String)temperature + " C";
    lcd.setCursor(2, 0);
    lcd.print(temp);

    String hum = "H: " + (String)humidity + " %RH";
    lcd.setCursor(2, 1);
    lcd.print(hum);

    delay(10000);

    String pres = "P: " + (String)pressure + " hPa";
    lcd.setCursor(2, 1);
    lcd.print(pres);
}

// Measure from HTU21D
float measure_htu21d(String data) {
  float temperature;
  float humidity;
  
  weatherShield.selectHTU21D();

  if (weatherShield.HTU21D.is_connected()) {
    weatherShield.HTU21D.set_i2c_master_mode(htu21_i2c_no_hold);       
    weatherShield.HTU21D.read_temperature_and_relative_humidity(&temperature, &humidity); 

    if (data == "temp") {
      return temperature;
    } else if (data == "humi") {
      return humidity;
    }
  }
  else {
    lcd.setCursor(2, 0);
    lcd.print("Napaka senzorja 1!");
  }
}

// Measure from MS5637
float measure_ms5637(String data) {
  float temperature;
  float pressure;
  
  weatherShield.selectMS5637();

  if (weatherShield.MS5637.is_connected()) {    
    weatherShield.MS5637.read_temperature_and_pressure(&temperature, &pressure);

    if (data == "temp") {
      return temperature;
    } else if (data == "pres") {
      return pressure;
    }
  }
  else {
    lcd.setCursor(2, 0);
    lcd.print("Napaka senzorja 2!");  }
}

// Measure from MS8607
float measure_ms8607(String data) {
  float temperature;
  float pressure;
  float humidity;
  
  weatherShield.selectMS8607();

  if (weatherShield.MS8607.is_connected()) {    
    weatherShield.MS8607.set_humidity_i2c_master_mode(ms8607_i2c_hold); 
    weatherShield.MS8607.read_temperature_pressure_humidity( &temperature, &pressure, &humidity);
    
    if (data == "temp") {
      return temperature;
    } else if (data == "humi") {
      return humidity;
    } else if (data == "pres") {
      return pressure;
    }
  } else {
    lcd.setCursor(2, 0);
    lcd.print("Napaka senzorja 3!");
  }
}

// Measure from TSYS01
float measure_tsys01(String data) {
  float temperature;
  
  weatherShield.selectTSYS01();

  if (weatherShield.TSYS01.is_connected()) {    
    weatherShield.TSYS01.read_temperature(&temperature);
    
    if (data == "temp") {
      return temperature;
    }
  } else {
    lcd.setCursor(2, 0);
    lcd.print("Napaka senzorja 4!");
  }
}

// Measure from TSD305
float measure_tsd305(String data) {
  float temperature;
  float object_temperature;
  
  weatherShield.selectTSD305();

  if (weatherShield.TSD305.is_connected()) {    
    weatherShield.TSD305.read_temperature_and_object_temperature(&temperature, &object_temperature);
    
    if (data == "temp") {
      return temperature;
    } else if (data == "obj_temp") {
      return object_temperature;
    }
  } else {
    lcd.setCursor(2, 0);
    lcd.print("Napaka senzorja 5!");
  }
}

float avg(String data) {
  if (data == "temp") {
    float avgTemp = (measure_htu21d("temp") + measure_ms5637("temp") + measure_ms8607("temp") + measure_tsys01("temp") + measure_tsd305("temp")) / 5;
    return avgTemp;
  } else if (data == "humi") {
    float avgHum = (measure_htu21d("humi") + measure_ms8607("humi")) / 2;
    return avgHum;
  } else if (data == "pres") {
    float avgPres = (measure_ms8607("pres") + measure_ms5637("pres")) / 2;
    return avgPres;
  }
}

void loop() {    
  StaticJsonDocument<100> jsonBuffer;
  
  float temperature = avg("temp");
  float pressure = avg("pres");
  float humidity = avg("humi");

  printLCD(temperature, humidity, pressure);

  jsonBuffer["temperature"] = temperature;
  jsonBuffer["humidity"] = humidity;
  jsonBuffer["pressure"] = pressure;

  serializeJson(jsonBuffer, Serial);
  Serial.println();

  delay(2000);
}