#include <TM1637Display.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Pin definitions for TM1637 displays
#define CLK1 2    // First display CLK
#define DIO1 3    // First display DIO
#define CLK2 5    // Second display CLK
#define DIO2 6    // Second display DIO

// Pin definitions for DS18B20 sensors
#define ONE_WIRE_BUS1 4   // First DS18B20 data pin
#define ONE_WIRE_BUS2 8   // Second DS18B20 data pin

// Pin definition for LED
#define LED_PIN 7

// Setup OneWire and DallasTemperature for two sensors
OneWire oneWire1(ONE_WIRE_BUS1);
OneWire oneWire2(ONE_WIRE_BUS2);
DallasTemperature sensors1(&oneWire1);
DallasTemperature sensors2(&oneWire2);

// Variables
TM1637Display display1(CLK1, DIO1);  // First display
TM1637Display display2(CLK2, DIO2);  // Second display

const uint8_t C[] = {
  SEG_B | SEG_A | SEG_F | SEG_G,
  SEG_A | SEG_D | SEG_E | SEG_F
};

float temperature1;  // Temperature from first sensor
float temperature2;  // Temperature from second sensor
const int threshold = 25;  // Fixed threshold temperature in Celsius

void setup() {
  // Initialize serial
  Serial.begin(9600);
  
  // Initialize DS18B20 sensors
  sensors1.begin();
  sensors2.begin();
  
  // Initialize displays
  display1.setBrightness(0x0f);
  display2.setBrightness(0x0f);
  
  // LED pin
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);  // Ensure LED is off initially
}

void loop() {
  // Read temperatures from both DS18B20 sensors
  temperature1 = readTemperature1();
  temperature2 = readTemperature2();

  // Display temperatures on both displays
  displayTemperature1();
  displayTemperature2();

  // Control LED based on temperature vs threshold
  if (temperature1 > threshold || temperature2 > threshold) {
    digitalWrite(LED_PIN, HIGH);  // Turn LED on if either temp > threshold
  } else {
    digitalWrite(LED_PIN, LOW);   // Turn LED off if both temps <= threshold
  }
}

// Function to read temperature from first DS18B20
float readTemperature1() {
  sensors1.requestTemperatures();
  float tempCelsius = sensors1.getTempCByIndex(0);
  if (tempCelsius == DEVICE_DISCONNECTED_C) {
    return -127.0;  // Error value if sensor is disconnected
  }
  return tempCelsius;
}

// Function to read temperature from second DS18B20
float readTemperature2() {
  sensors2.requestTemperatures();
  float tempCelsius = sensors2.getTempCByIndex(0);
  if (tempCelsius == DEVICE_DISCONNECTED_C) {
    return -127.0;  // Error value if sensor is disconnected
  }
  return tempCelsius;
}

// Function to display the temperature on the first TM1637 display
void displayTemperature1() {
  int displayTemp = (int)(temperature1 * 1);  // No decimal place
  display1.showNumberDecEx(displayTemp, 0b0000, false, 2, 0);  // No colon or decimal
  display1.setSegments(C, 2, 2);  // Show "C" symbol
}

// Function to display the temperature on the second TM1637 display
void displayTemperature2() {
  int displayTemp = (int)(temperature2 * 1);  // No decimal place
  display2.showNumberDecEx(displayTemp, 0b0000, false, 2, 0);  // No colon or decimal
  display2.setSegments(C, 2, 2);  // Show "C" symbol
}