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

// Pin to which the DS18B20 is connected
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);

// Pass the oneWire reference to DallasTemperature
DallasTemperature sensors(&oneWire);

// Maximum number of DS18B20 sensors
#define MAX_SENSORS 25

// Function to save the device address to EEPROM
void saveAddressToEEPROM(DeviceAddress deviceAddress, int index) {
  int startAddress = index * 8; // Each address is 8 bytes
  for (uint8_t i = 0; i < 8; i++) {
    EEPROM.write(startAddress + i, deviceAddress[i]);
  }
}

// Function to read the device address from EEPROM
void readAddressFromEEPROM(DeviceAddress deviceAddress, int index) {
  int startAddress = index * 8; // Each address is 8 bytes
  for (uint8_t i = 0; i < 8; i++) {
    deviceAddress[i] = EEPROM.read(startAddress + i);
  }
}

void setup() {
  // Start serial communication
  Serial.begin(9600);
  // Start the DS18B20 sensor
  sensors.begin();

  // Search for devices on the bus
  oneWire.reset_search();

  DeviceAddress deviceAddress;
  int sensorCount = 0;

  // Search for all devices and save their addresses
  while (oneWire.search(deviceAddress)) {
    if (sensorCount < MAX_SENSORS) {
      Serial.print("Found device with address: ");
      for (uint8_t i = 0; i < 8; i++) {
        Serial.print(deviceAddress[i], HEX);
        if (i < 7) Serial.print(", ");
      }
      Serial.println();

      // Save the address to EEPROM
      saveAddressToEEPROM(deviceAddress, sensorCount);
      Serial.println("Address saved to EEPROM");
      sensorCount++;
    } else {
      Serial.println("Maximum sensor limit reached.");
      break;
    }
  }

  if (sensorCount == 0) {
    Serial.println("No DS18B20 temperature sensors are installed.");
  }

  // To verify, read the addresses back from EEPROM
  for (int i = 0; i < sensorCount; i++) {
    DeviceAddress readAddress;
    readAddressFromEEPROM(readAddress, i);
    Serial.print("Read address from EEPROM (sensor ");
    Serial.print(i);
    Serial.print("): ");
    for (uint8_t j = 0; j < 8; j++) {
      Serial.print(readAddress[j], HEX);
      if (j < 7) Serial.print(", ");
    }
    Serial.println();
  }
}

void loop() {
  // Put your main code here, to run repeatedly
}