* You only need one 4.7k pullup resistor for all 1-Wire devices connected to Arduino pin 3 All of the DS18B20 temperature sensors can be connected to the same IO pin: Use your solderless breadboard to make the connections. If this is your first Arduino project, first go through our “ Arduino: Getting Started” tutorial. Arduino board ( Uno, Mega, Duemilanove, etc.) Software code used in this tutorial can be downloaded here:Īrduino ds18b20 Temperature Sensor Sketch This tutorial will show you how to connect many DS18B20, "1-Wire" temperature sensors to your Arduino board, using only 1 digital IO pin/one cable. This is a new version of our 1-Wire digital temperature sensor tutorial, now with more temperature sensing! Please download the latest version of the Arduino software at this URL: This tutorial has been updated to use version 1.0+ of the Arduino software, and compatible libraries.
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