My mistake, I assumed revpimodio2 was a Kunbus product. The DO sensors work fine using pi test, and even stand alone controls using revpimodio2. What is even more worrying, is my code now works fine (unchanged), switching on an off as requested by the software. There was obviously a hang up somewher...

Hi, I aim to use a Compact to control MOSFET power switches using Python and revpimodio2. . As I am new to the Rev PI I wrote simple test code to understand how to use the IO. It seemed to work. However, While I can turn on the DO from a script, it no lnger seems to turn off. So I ran my early test ...