How to add a second DS18b20 temp sensor to raspberry pi

FAQ's
1

hi all,

how do i add a second DS18b20 temp sensor to raspberry pi, i have the first one wired to GPIO 4 for automatic detection, how do i find out the slave address for the second sensor?

2

Add your second (third, fourth, etc.) to the same 5v, Gnd, and GPIO4. Make sure you have your 4.7k ohm resistor. Auto discovery should find it under your raspi device.

4

1716×1283 150 KB

5

thanks for your reply i found this drawing online

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6

So how many of these temp sensors can be powered off the raspberry pi?

7

You can connect as many as you want but use an external power source to power the temp sensor.

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