Arduino Projects

Interfacing Multiple DS18B20 Temperature Sensors to Arduino

Interfacing Multiple DS18B20 Temperature Sensors to Arduino:

In this project, we will learn about Interfacing Multiple DS18B20 Temperature Sensors to Arduino. Simply we will connect Multiple DS18B20 Temperature Sensors to Arduino and display the temperature values of all the sensors in degrees Celsius or Fahrenheit. Only one digital pin of Arduino is required to connect several temperature sensors. We can connect a maximum of 1024 sensors using the I2C Protocol. But here I have shown connecting 3 DS18B20 Temperature Sensors to Arduino. I have also a very detailed tutorial on how to connect multiple MAX6675 K-type thermocouples with the Arduino.

The DS18B20 temperature sensor is a 1-wire digital temperature sensor. This comes with a sealed package lets precisely measure temperatures in wet environments with a simple 1-Wire interface. It communicates on a common bus. It means it can connect several devices and read their values using just one digital pin of the Arduino.

DS18B20 Waterproof Digital Temperature Sensor:

This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for when you need to measure something far away, or in wet conditions. The Sensor can measure the temperature between -55 to 125°C (-67°F to +257°F). The cable is jacketed in PVC.

allpcb circuit

Because it is digital, there is no any signal degradation even over long distances. These 1-wire digital temperature sensors are fairly precise, i.e ±0.5°C over much of the range. It can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin.

DS18B20
The only downside is they use the Dallas 1-Wire protocol, which is somewhat complex and requires a bunch of code to parse out the communication. We toss in a 4.7k resistor, which is required as a pullup from the DATA to the VCC line when using the sensor.

Components Required:

Arduino UNO Board
Multiple DS18B20 Waterproof Temperature Sensor
16*2 LCD Display
4.7K Resistor
Breadboard
Connecting Jumper Wires

Amazon Links:

Arduino Nano USB-C Type (Recommended)

12v Adaptor:

DS18B20 one-wire digital temperature sensor:

16X2 LCD

Arduino Uno

*Disclosure: These are affiliate links. As an Amazon Associate I earn from qualifying purchases.

Multiple DS18b20 sensors Interfacing with Arduino:

Interfacing Multiple DS18B20 Arduino, in this image you can see, multiple ds18b20 temperature sensors are interfaced with arduino, a 16x2 lcd is also connected with the arduino.

Multiple DS18b20 Arduino Source Code/Program:

Related Project:

Nodemcu ESP8266 DS18b20 Waterproof Temperature Sensor Monitoring

Engr. Shahzada Fahad

Engr. Shahzada Fahad is an Electrical Engineer with over 15 years of hands-on experience in electronics design, programming, and PCB development. He specializes in microcontrollers (Arduino, ESP32, STM32, Raspberry Pi), robotics, and IoT systems. He is the founder and lead author at Electronic Clinic, dedicated to sharing practical knowledge.

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