// Include the libraries we need
#include <OneWire.h>
#include <DallasTemperature.h>
#include <SoftwareSerial.h>

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS PA0

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
SoftwareSerial mySerial(PA6, PA5); // RX, TX



/*
   The setup function. We only start the sensors here
*/
void setup(void)
{
  // start serial port
  // Start up the library
  sensors.begin();
  pinMode(PA7, OUTPUT);
  pinMode(PA1, OUTPUT);
  mySerial.begin(4800);

}

/*
   Main function, get and show the temperature
*/
void loop(void)
{
  // call sensors.requestTemperatures() to issue a global temperature
  // request to all devices on the bus
  sensors.requestTemperatures(); // Send the command to get temperatures
  // After we got the temperatures, we can print them here.
  // We use the function ByIndex, and as an example get the temperature from the first sensor only.
  float tempC = sensors.getTempCByIndex(0);

  // Check if reading was successful
  if (tempC != DEVICE_DISCONNECTED_C)
  {
    // Serial.println(tempC);
    if (tempC < 25.0) {
      digitalWrite(PA7, !digitalRead(PA7));
      digitalWrite(PA1, LOW); //relay Fan off
      mySerial.println("Temp: " + (String)(tempC));
      mySerial.println(" Fan:  " + (String)(int)digitalRead(PA1));
    }
    else //>25C
    {
      digitalWrite(PA7, HIGH); // LED ON
      digitalWrite(PA1, HIGH); // relay FAN on
      mySerial.println("Temp: " + (String)(tempC));
      mySerial.println(" Fan:  " + (String)(int)digitalRead(PA1));
    }
  }
  else
  {
    // Serial.println("Error: Could not read temperature data");
    digitalWrite(PA7, LOW); // LED off
    digitalWrite(PA1, LOW); //relay Fan off
    mySerial.println("Error: Could not read temperature data");
  }
}