I setup a generic digital output, with a led (and series resistor) from 3.3 volts to the output. Using the API example in the App, I can turn the output on (LED lights) but I cannot turn it off again.
I have tried this on two different WIOs, and the result is the same. The output works for temperature/humidity sensors, so the output seems to be OK.
So it appears to be a software problem, has anyone come across this before?