OK / KO on initialization (code examples) about pcf8574_library

[xreef]

Hi AlbertEmil,
I think you are not using my library, I check and I don't manage the status with wire.begin (It's a void function), I test It and the status work correctly with Arduino, esp8266 and esp32.
Please check and give me a feedback.
Thanks Renzo

[AlbertEmil]

Hi Renzo,
I double checked the library I am using and it is definitely yours. As initially written, I always get a "KO" status upon initialization (when using one of your examples). Could you elaborate on the pcf8574.begin() function? Where is this boolean getting its value from? I just started with C and did not find any useful hint why I am always getting a "KO" instead of a "OK". However, the Port Expander is working just fine, even with a "KO" status.
Greetings, Al

[xreef]

Mmm.. It's strange, can you give me more informations, the microcontroller, and a piece of your code.
Thanks Renzo

[woyzeck]

I had the same issue today and from looking at the code of begin() my suspicion is that if you don't set any pinMode before calling begin() it will fail.

[xreef]

Hi woyzeck,
It's true I return a KO if pinMode isn't set.
Thanks for your support.
Bye Renzo

[dragosmacovei]

I have the same problem what do I have to do? it is unclear what solves the problem. pinMode is a function that applies to some specific pin. For what pin to call the pinMode function?