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can we use uart to communicate wire one wire device

Question asked by HARI krishna on Jun 15, 2017
Latest reply on Oct 20, 2017 by Andrew Neil

Hi all,

 

I have DS18B20 sensor which works on the one wire protocol & it was interfaced to STM32F030C8T6 controller.

But it was failed to communicate(respond) with the device over UART2.Below is the uart to device connection Fig.

I am using 3.3V for to power the device and 2.2K pull-up on the bus(as mentioned in the datasheet).

How to Generate reset signal (480us low on the bus) on the uart pins for one wired device.

please help me on this issue

 

UART Connection to one wire Bus :

 

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