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Many thanks - I got this to work but haven't had a chance to come back since to say thank you!

I am looking to simply use the I/O ports on the serial expansion to send 5v signals to some relay boards I have, to control some external components. I can't find any flowcode that will allow me to just turn the output on in the same way as I can use the component macro for the MIAC - OutputON - can ...