I think there is a hardware issue.
That code works with standalone module with PCF8575. But does not work with the chip directly soldered to my PCB, so I will swap the IC today later and see, if there's any difference.
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Re: PCF8575 Does not work with my code....
I think there is a hardware issue.
That code works with standalone module with PCF8575. But does not work with the chip directly soldered to my PCB, so I will swap the IC today later and see, if there's any difference.
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