[Arduino source code for KC868-A4]-18 one GPIO with multiple DS18B20 sensor

[admin]

these 10pcs of DS18B20 temperature sensors work with one ESP32 GPIO. program will print 10 sensor's value at the same time.
   
   
   

Code:

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

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 13
#define TEMPERATURE_PRECISION 9

// 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);

// arrays to hold device addresses
DeviceAddress sensor1,sensor2,sensor3,sensor4,sensor5,sensor6,sensor7,sensor8,sensor9,sensor10;


void setup(void)
{
  // start serial port
  Serial.begin(115200);

  // Start up the library
  sensors.begin();

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

  //
  // method 1: by index
  if (!sensors.getAddress(sensor1, 0)) Serial.println("Unable to find address for Device 0");
  if (!sensors.getAddress(sensor2, 1)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor3, 2)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor4, 3)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor5, 4)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor6, 5)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor7, 6)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor8, 7)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor9, 8)) Serial.println("Unable to find address for Device 1");
  if (!sensors.getAddress(sensor10, 9)) Serial.println("Unable to find address for Device 1");


  // set the resolution to 9 bit per device
  sensors.setResolution(sensor1, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor2, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor3, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor4, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor5, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor6, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor7, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor8, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor9, TEMPERATURE_PRECISION);
  sensors.setResolution(sensor10, TEMPERATURE_PRECISION);
}

void loop(void)
{
  // call sensors.requestTemperatures() to issue a global temperature
  // request to all devices on the bus
// sensors.requestTemperatures();
  float tempC1 = sensors.getTempC(sensor1);
  float tempC2 = sensors.getTempC(sensor2);
  float tempC3 = sensors.getTempC(sensor3);
  float tempC4 = sensors.getTempC(sensor4);
  float tempC5 = sensors.getTempC(sensor5);
  float tempC6 = sensors.getTempC(sensor6);
  float tempC7 = sensors.getTempC(sensor7);
  float tempC8 = sensors.getTempC(sensor8);
  float tempC9 = sensors.getTempC(sensor9);
  float tempC10 = sensors.getTempC(sensor10);   
  Serial.println(tempC1);
  Serial.println(tempC2);
  Serial.println(tempC3);
  Serial.println(tempC4);
  Serial.println(tempC5);
  Serial.println(tempC6);
  Serial.println(tempC7);
  Serial.println(tempC8);
  Serial.println(tempC9);
  Serial.println(tempC10);
  Serial.println("*************");
 
}