Hi all - I’m experiening a really strange thing that is slightly confusing me.
I have two load cell chips connected to a photon - I’m reading Load Cell data from them via an HX711 library (which seems to just bit bang the data in) over pins D2 & D3.
Thing is - they read perfectly stable over my web interface but as soon as I plug in a USB cable to read serial debug data from the photon, the Load Cell data goes completely haywire and jumps all over the place.
Has anyone experienced interference like this?
I have even tested it with printing no serial data over the usb wire and just having it plugged in - same behaviour.