Multiple DS18B20 Sensors with Arduino | Complete Tutorial (Index & Address Method)

Learn how to connect multiple DS18B20 temperature sensors to an Arduino using the 1-Wire protocol. In this complete step-by-step tutorial, you’ll learn two different methods for reading temperatures from multiple sensors: reading by index and reading by unique 64-bit address.

We’ll start by wiring multiple DS18B20 sensors to a single Arduino pin, install the required OneWire and DallasTemperature libraries, and then write Arduino code to detect and read all connected sensors. You’ll also learn why reading by index isn’t always reliable and how using each sensor’s unique address provides a permanent and dependable solution for real-world projects.

📌 In this video you’ll learn:
✔ How to connect multiple DS18B20 sensors to Arduino
✔ Required wiring and the 4.7kΩ pull-up resistor
✔ Installing the OneWire and DallasTemperature libraries
✔ Reading temperature by sensor index
✔ Finding the unique 64-bit address of each sensor
✔ Reading temperature by sensor address
✔ Understanding the advantages and limitations of both methods
✔ Complete Arduino code explanation
✔ Live demonstration on the Serial Monitor

This tutorial is perfect for beginners as well as anyone building weather stations, data loggers, home automation systems, greenhouse monitoring, IoT projects, or any application requiring multiple temperature sensors.

Previous Video:
DS18B20 Temperature sensor with Arduino [ https://www.youtube.com/watch?v=E1DsRvAQ_fY ]

Arduino Codes:
https://docs.google.com/document/d/1q0RLtFb67r2lWhoSS1jRHzNwAksPx38D25geJbelSmc/edit?usp=sharing

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#arduino #DS18B20 #temperaturesensor #OneWire #DallasTemperature #arduinotutorials #ElectroNerdsAcademy #embeddedsystems #electronics #programming