// nano "thermo" project v1.3
// sensors: dht22
// display: lcd1604

#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <DHT_U.h>

// Define digital pins connected to Sensors
#define DHT_A_PIN 2
#define DHT_B_PIN 3
#define DHT_C_PIN 4

#define DHT_A_TYPE DHT22
#define DHT_B_TYPE DHT22
#define DHT_C_TYPE DHT22

LiquidCrystal_I2C lcd(0x27, 16, 2);

DHT_Unified dht_A(DHT_A_PIN, DHT_A_TYPE);
DHT_Unified dht_B(DHT_B_PIN, DHT_B_TYPE);
DHT_Unified dht_C(DHT_C_PIN, DHT_C_TYPE);

void setup() {
  lcd.init();
  lcd.backlight();

  delay(1000);

  lcd.home();
  lcd.print("Lilyhammer Meteo");
  delay(1000);
  lcd.setCursor(0, 1);
  lcd.print("by Andrey Sobina");
  
  // Initialize device
  Serial.begin(9600);
  Serial.println(F("nano thermo project v1.3"));
  
  // Initialize Sensors
  dht_A.begin();
  dht_B.begin();
  dht_C.begin();

  delay(3000);
}

void loop() {
  dht_sauna();
  delay(5000);
  dht_room();
  delay(5000);
  dht_outside();
  delay(5000);
}

void dht_sauna() {
  lcd.clear();
  lcd.home();

  // Get temperature event from sensor A and print its value
  sensors_event_t event;
  dht_A.temperature().getEvent(&event);
  if (isnan(event.temperature)) {
    Serial.println(F("Sauna sensor: Error reading temperature"));
    lcd.setCursor(0, 0);
    lcd.print("Error sensor A");
  }
  else {
    lcd.print("Sauna:  ");
    lcd.print(event.temperature);
    lcd.print(" ");
    lcd.print(char(223));
    lcd.print("C");
  }

  // Get humidity event from sensor A and print its value
  dht_A.humidity().getEvent(&event);
  if (isnan(event.relative_humidity)) {
    Serial.println(F("Sauna sensor: Error reading humidity"));
    lcd.setCursor(0, 1);
    lcd.print("Error sensor A");
  }
  else {
    lcd.setCursor(0, 1);
    lcd.print("        ");
    lcd.print(event.relative_humidity);
    lcd.print(" %");
  }
}

void dht_room() {
  lcd.clear();
  lcd.home();

  // Get temperature event from sensor B and print its value
  sensors_event_t event;
  dht_B.temperature().getEvent(&event);
  if (isnan(event.temperature)) {
    Serial.println(F("Room sensor: Error reading temperature"));
    lcd.setCursor(0, 0);
    lcd.print("Error sensor B");
  }
  else {
    lcd.print("Room:   ");
    lcd.print(event.temperature);
    lcd.print(" ");
    lcd.print(char(223));
    lcd.print("C");
  }

  // Get humidity event from sensor B and print its value
  dht_B.humidity().getEvent(&event);
  if (isnan(event.relative_humidity)) {
    Serial.println(F("Room sensor: Error reading humidity"));
    lcd.setCursor(0, 1);
    lcd.print("Error sensor B");
  }
  else {
    lcd.setCursor(0, 1);
    lcd.print("        ");
    lcd.print(event.relative_humidity);
    lcd.print(" %");
  }
}

void dht_outside() {
  lcd.clear();
  lcd.home();

  // Get temperature event from sensor C and print its value
  sensors_event_t event;
  dht_C.temperature().getEvent(&event);
  if (isnan(event.temperature)) {
    Serial.println(F("Outside sensor: Error reading temperature"));
    lcd.setCursor(0, 0);
    lcd.print("Error sensor C");
  }
  else {
    lcd.print("Outs.:  ");
    lcd.print(event.temperature);
    lcd.print(" ");
    lcd.print(char(223));
    lcd.print("C");
  }

  // Get humidity event from sensor C and print its value
  dht_C.humidity().getEvent(&event);
  if (isnan(event.relative_humidity)) {
    Serial.println(F("Outside sensor: Error reading humidity"));
    lcd.setCursor(0, 1);
    lcd.print("Error sensor C");
  }
  else {
    lcd.setCursor(0, 1);
    lcd.print("        ");
    lcd.print(event.relative_humidity);
    lcd.print(" %");
  }
}