#include <TM1637Display.h>    // Library for TM1637 4-digit display
#include <OneWire.h>          // Library for OneWire communication
#include <DallasTemperature.h> // Library for DS18B20 sensor


#define TM1637_CLK 1    // CLK pin for TM1637 (GPIO 6)
#define TM1637_DIO 0    // DIO pin for TM1637 (GPIO 7)
#define DS18B20_PIN 3   // Data pin for DS18B20 (GPIO 5)

// Initialize TM1637 display
TM1637Display display(TM1637_CLK, TM1637_DIO);

// Initialize OneWire and DallasTemperature for DS18B20
OneWire oneWire(DS18B20_PIN);
DallasTemperature sensors(&oneWire);

// Custom "C" symbol for Celsius
const uint8_t C[] = {
  SEG_B | SEG_A | SEG_F | SEG_G,  // First part of "C"
  SEG_A | SEG_D | SEG_E | SEG_F   // Second part of "C"
};

void setup() {
  // Start serial communication for debugging
  //Serial.begin(115200);
  delay(1000); // Give time for Serial to initialize
  
  // Initialize the DS18B20 sensor
  sensors.begin();
  
  // Check if sensor is detected
 // Serial.print("Number of devices found: ");
 // Serial.println(sensors.getDeviceCount());
  
  // Initialize the TM1637 display
  display.setBrightness(0x0f); // Max brightness
  display.clear();
  
 // Serial.println("ESP32-C3 Mini with DS18B20 and TM1637 initialized");
}

void loop() {
  // Request temperature from DS18B20
  //Serial.println("Requesting temperature...");
  sensors.requestTemperatures();
  delay(750); // Wait for conversion (DS18B20 needs ~750ms at 12-bit resolution)
  
  float tempc = sensors.getTempCByIndex(0); // Get temperature in Celsius
  
  // Debugging output
 // Serial.print("Raw temperature reading: ");
 // Serial.print(tempc);
 // Serial.println(" °C");

  // Check if reading is valid
  if (tempc == DEVICE_DISCONNECTED_C || tempc < -55 || tempc > 125) {
    display.showNumberDecEx(8888, 0, true); // Display error code
   // Serial.println("Error: Sensor disconnected or invalid reading");
  } else {
    // Convert temperature to integer with one decimal place (e.g., 23.5 -> 235)
    int tempDisplay = tempc * 1;

    // Show temperature with decimal point
    display.showNumberDecEx(tempDisplay, 0b0100, false, 2, 0);
    display.setSegments(C, 2, 2); // Show "C" symbol

   // Serial.print("Displayed temperature: ");
   // Serial.print(tempc);
   // Serial.println(" °C");
  }

  delay(1000); // Update every 1 second
}