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Hello, Did you solve this problem? I have a very similar problem. My Z-Uno had connected - 8 Binary switches operating an 8 channel relay board 2 Temperature sensors, Ranging -30 to + 30 1 Power meter 1 Lux sensor This was all working fine, I upgraded the firmware to 2.1.5 and now I am struggling to...

Hello,

Does your code for the z-uno and arduino mega 2560 use all the available digitial & analogue pins on the mega 2560?

Thanks