Pcf problem with extra inputs

[PaulRB]

@byteman59

whose post did i hijack

You posted your question in this topic:

PCF8575 input pull-up

I measured pins states with DMM and it shows that they are at LOW state (= 0V). I used the code from my first message. I also tried to loop this code to see if pcf8757.digital.ReadAll() mixes something but it didn't change anything and DMM measured still 0V in all 16 IO-pins. void loop() { for(int i=0;i<16;i++) { pcf8575.digitalWrite(i, HIGH); } }

The topic your post was moved to looks like you created it because it is now the first post in the topic.