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VELA switchable window film

Hey Team

 

Just trying to get a VELA switchable film behaving... on the bench without the film and just the controller i had it working in theory (detecting voltage change on switch state AC output. 

So how would I send a command or close the circuit on the GPIO port 0 in the interactive presentation? I have tried setting the GPIO to input and output and its just not working now.

Any clues?

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