Hi,
I fear there is a failure in the PCF8574 module. Whe i write to the expander with the adress 000 it works, but I am not able to read the data from the other chip. When I use the Arduino App, everything works just as it should. Can you please help ?
my regards

Works much better now. Thank you very much for the quick response!

I have implemented serial communication between two devices via the UART (RS232) component. If I switch from Channel 1 to another channel I have to double the baudrate in the properties to get the right value (eg. 230400 in the properties means 115200 in real life). Am I doing sth. wrong? Just switc...