Establish communication with OneWire probe DS18B20 using IO of PCA9574

[dhineshpitchai]

Hi team,

In our STM32L082 based board we use PCA9574, as we do not have enough pins in the micro-controller.

We have to use one of the IO pin of PCA9574 to establish communication with One Wire probe DS18B20.

I am facing challenges in establishing communication, as the default Arduino based One Wire library will not be helpful and I have developed similar library to use PCA9574 IO pin.

But that does not help in establishing communication.

Can anyone please help me with this issue.

- Dhinesh

[dhineshpitchai]

Thank you for quick reply, due to time constraints with one-wire protocol using IO of an IO expander as data line will not work

[ErikaC]

Hello,

I am afraid that the PCA9574 device does not feature the one-wire interface. I know that it is a similar concept of the I2C but, unfortunately, we do not have any experience with it.

The device might work but it is not guaranteed.