// https://forum.arduino.cc/t/help-with-aditional-code/1264085
// date  24/05/2024
//Home_temp_leds_DHT22_v2_IDE
// conventional delay
//This version uses a DHT22 Sensor
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Servo.h>
//#include <OneWire.h>
//#include <DallasTemperature.h>
#define DHTPIN 2
#define DHTTYPE DHT22
DHT_Unified dht(DHTPIN, DHTTYPE);
// =========================================
int SENSOR_PIN = 2;
int SERVO_PIN = 9;
int sensorValue;          // variable to store temp. sensor value
int previousTemperature;  // last temperature shown prior to current temparature reading
int currentTemperature = 0;
const int ledH = (10);  // warmng red led and wire
const int ledL = (11);  // cooling orange wire
const int ledN = (12);  //steady green led and wire
//const float TEMPERATURE_THRESHOLD = 26;
Servo servo;
//OneWire oneWire(SENSOR_PIN);
//DallasTemperature sensor(&oneWire);
float temperature;
//float Temperature;
float servopos;
//unsigned long delayTime =  2UL * 60UL * 1000UL;  //set delay time = 2 min
unsigned long delayTime =  1000UL;  //For debug
unsigned long readTime = 0;
// ==========================================================================
void setup() {
  Serial.begin(9600);
  pinMode(ledH, OUTPUT);
  pinMode(ledL, OUTPUT);
  pinMode(ledN, OUTPUT);

  servo.attach(SERVO_PIN);  // attaches the servo on pin 9 to the servo object
  servo.write(0);
  currentTemperature = (SENSOR_PIN);  //(temperature);   //(SENSOR_PIN);
  //sensor.begin();
  dht.begin();
  Serial.println(F("DHTxx Unified Sensor Example"));
  sensor_t sensor;
  dht.temperature().getSensor(&sensor);
}
//==============================================================================
void loop() {
  if (millis() - readTime > delayTime )
  {
    readTime = millis();
    // delay(1000);
    // delay(2 * 60 * 1000UL);  //set delay time = 2 min
    sensors_event_t event;
    dht.temperature().getEvent(&event);
    if (isnan(event.temperature)) {
      Serial.println(F("Error reading temperature!"));
    } else {
      Serial.print(F("Temperature: "));
      Serial.print(event.temperature);
      Serial.println(F("°C"));
    }
    previousTemperature = currentTemperature;
    currentTemperature = (event.temperature);            //(DHT22 SENSOR_PIN);

    if (currentTemperature > previousTemperature)  // warming
    {
      Serial.println(F(" Warming"));
      digitalWrite(ledH, HIGH);
      digitalWrite(ledL, LOW);
      digitalWrite(ledN, LOW);
      delay(50);
    } else if (currentTemperature < previousTemperature)  // cooling
    {
      Serial.println(F("Cooling"));
      digitalWrite(ledL, HIGH);
      digitalWrite(ledH, LOW);
      digitalWrite(ledN, LOW);
      delay(50);
    } else if (currentTemperature == previousTemperature)  // steady
    {
      Serial.println(F(" Steady"));
      digitalWrite(ledN, HIGH);
      digitalWrite(ledH, LOW);
      digitalWrite(ledL, LOW);
    }
    { servopos = map(currentTemperature, 10, 26, 180, 0);  // set temperature range and servo angles
      if (servopos < 0) servopos = 0;
      if (servopos > 180) servopos = 180;
      servo.write(servopos);  // write servo position indcating temperature
      //delay(50);
    }
    //delay(1000UL);  //set delay time = 2 min
  }
}