// https://randomnerdtutorials.com/esp32-ds18b20-temperature-arduino-ide/


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


const int oneWireBus = 4;     // GPIO data of DS18B20
const int sensordelay = 1000;

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

DallasTemperature sensors(&oneWire);   // Pass our oneWire reference to Dallas Temperature sensor 


// function to print a device address
void printAddress(DeviceAddress deviceAddress) {
  for (uint8_t i = 0; i < 8; i++){
    if (deviceAddress[i] < 16) Serial.print("0");
      Serial.print(deviceAddress[i], HEX);
  }
}


int numberOfDevices;
DeviceAddress tempDeviceAddress;


void setup() {
  // Start the Serial Monitor
  Serial.begin(115200);

  // Start the DS18B20 sensor
  // pinMode(oneWireBus, INPUT);
  sensors.begin();

  numberOfDevices = sensors.getDeviceCount();

  // locate devices on the bus
  Serial.print("Locating devices...");
  Serial.print("Found ");
  Serial.print(numberOfDevices, DEC);
  Serial.println(" devices.");

  // Loop through each device, print out address
  for(int i=0;i<numberOfDevices; i++){
    // Search the wire for address
    if(sensors.getAddress(tempDeviceAddress, i)){
      Serial.print("Found device ");
      Serial.print(i, DEC);
      Serial.print(" with address: ");

      printAddress(tempDeviceAddress);
      Serial.println();
    } else {
      Serial.print("Found ghost device at ");
      Serial.print(i, DEC);
      Serial.print(" but could not detect address. Check power and cabling");
    }
  }
}



void loop() {

  /*
  sensors.requestTemperatures(); 
  float temperatureC = sensors.getTempCByIndex(0);
  float temperatureF = sensors.getTempFByIndex(0);
  Serial.print(temperatureC);
  Serial.println("ºC");
  Serial.print(temperatureF);
  Serial.println("ºF");
  delay(5000);
  */

  sensors.requestTemperatures();               // Send the command to get temperatures
  
                                               // Loop through each device, print out temperature data
  for(int i=0;i<numberOfDevices; i++){
    // Search the wire for address
    if(sensors.getAddress(tempDeviceAddress, i)){
      // Output the device ID
      Serial.print("Temperature for device: ");
      Serial.println(i,DEC);
      // Print the data
      float tempC = sensors.getTempC(tempDeviceAddress);
      Serial.print("Temp C: ");
      Serial.print(tempC);
      Serial.print(" Temp F: ");
      Serial.println(DallasTemperature::toFahrenheit(tempC)); // Converts tempC to Fahrenheit
    }

  }
  delay(sensordelay);

}