Question

Hello,

I try to connect four Dallar DS18B20 1-wire sensor to the FMC125.

But I dont know how to connect it. The FMC125 have just a 1Wire Data cable.

• What is with 1-Wire power?
• Or put the Sensor in parasitic power mode (Sensor VDD to GND)?
• Is a pullup resistor needed?

BR,
David

Answer 1

Hi, you just connect the data wire from 1 wire sensor to pin 11 (1wire data) and other wore to PIN 7 (GND).

Comments

Great! This works.

A little bit confusing to put sensor VCC to GND. But it works.

The sensor shows 226 °C.

I also tried another one. But with the same result...

Any Ideas?

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It is 22.6 °C.

You need to multiply the temperature sensor value with 0.1 at server side.