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One wire interface fr STM32G474MBT6

sreejithrnair2026
Visitor

‎2026-02-06 2:22 AM

I want to interface STM32G474 MCU with DS18B20 digital temperature probe in my project. The DS18B20 uses one-wire interface. Is one wire interface supported with this MCU? 

 

Kindly provide a detailed explanation. Help please.

 

Datasheet link for DS1B20: EVVO DS18B20Axx

 

Regards,
Sreejith

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mƎALLEm
ST Employee

‎2026-02-06 2:27 AM - edited ‎2026-02-06 2:32 AM

Hello @sreejithrnair2026 and welcome to the ST community,

The protocol used by this sensor is not supported natively by the MCU. You need to use GPIO and may be a timer to communicate with a such sensor.

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Uwe Bonnes
Chief

‎2026-02-06 2:30 AM

You can easily implement one-wire with an uart. Uart Feature of G4 like logic inversion, open drain  and half duplex  mode  allows implementation with one pullup.

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mƎALLEm
ST Employee

‎2026-02-06 2:36 AM

And it seems others already implemented that:

Example: https://github.com/nimaltd/ds18b20/tree/master

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