Overview
The DS18B20 1-Wire digital temperature sensor from Maxim IC reports degrees C with 9 to 12-bit precision, -55C to 125C (+/-0.5C). Each sensor has a unique 64-Bit Serial number etched into it - allows for a huge number of sensors to be used on one data bus.
Wiring the DS18B20
Normal Power Mode
Parasitic Power Mode
Arduino Sample Code
#include <OneWire.h>
#include <DallasTemperature.h>
#define PIN_TEMPERATURE 4
OneWire oneWire(PIN_TEMPERATURE);
DallasTemperature sensors(&oneWire);
float currentTemp = 0;
void setup() {
Serial.begin(115200);
}
void loop() {
sensors.requestTemperatures();
currentTemp = sensors.getTempCByIndex(0);
Serial.print("Temperature: ");
Serial.println(currentTemp);
delay(500);
}
References
| Reference | URL |
|---|---|
| Product Sheet | https://www.maximintegrated.com/en/products/sensors/DS18B20.html |
| Interfacing DS18B20 1-Wire Digital Temperature Sensor with Arduino | https://lastminuteengineers.com/ds18b20-arduino-tutorial/ |
| Arduino Temperature Control Library | https://github.com/milesburton/Arduino-Temperature-Control-Library |
| MAX31850 OneWire Library | https://github.com/adafruit/MAX31850_OneWire |
How to measure temperature with your Arduino and a DS18B20 | https://www.tweaking4all.com/hardware/arduino/arduino-ds18b20-temperature-sensor/ |