#include <microDS18B20.h>             // Include the microDS18B20 library
MicroDS18B20<26> sensor1;              // DS18B20 sensor on GPIO 26
MicroDS18B20<27> sensor2;              // DS18B20 sensor on GPIO 27

const int ledPin = 22;                 // LED on GPIO 22
bool overrideActive = false;           // Flag: are we in override mode?
bool overrideState = LOW;              // Forced LED state when overridden

void setup() {
  Serial.begin(9600);                  // Start serial at 9600 baud (no banners)
  pinMode(ledPin, OUTPUT);             // Configure LED pin as output
}

void loop() {
  // 1) Start a new temperature conversion on both sensors
  sensor1.requestTemp();               
  sensor2.requestTemp();               

  // 2) Wait for conversion to complete (12-bit ≈750 ms; wait 1 s to be sure)
  delay(1000);                         

  // 3) Read temperatures (in °C) from the sensors
  float t1 = sensor1.getTemp();        
  float t2 = sensor2.getTemp();        

  // 4) Compute the mean of the two readings
  float meanTemp = (t1 + t2) / 2.0;    

  // 5) Check for an incoming override command ('1' or '0')
  if (Serial.available() > 0) {
    char cmd = Serial.read();          
    if (cmd == '1') {                  
      overrideActive = true;           
      overrideState = HIGH;            
    } 
    else if (cmd == '0') {
      overrideActive = true;           
      overrideState = LOW;             
    }
  }

  // 6) Control the LED: override if active, else auto on mean ≥23 °C
  if (overrideActive) {
    digitalWrite(ledPin, overrideState);
  } else {
    if (meanTemp >= 23.0) digitalWrite(ledPin, HIGH);
    else                  digitalWrite(ledPin, LOW);
  }

  // 7) Send one CSV line: mean;t1;t2\n (two decimals, no extra text)
  Serial.print(meanTemp, 2);
  Serial.print(';');
  Serial.print(t1,       2);
  Serial.print(';');
  Serial.print(t2,       2);
  Serial.print('\n');
}