I got it to 15 sections. But the buttons are getting tight. Along the same lines, is there a disadvantage to an arduino mega 2560? Running out of gpio pins with this many sections if i also want to add manual section switches like mtz. I donít want 15 but would like a few.
If you are running out of pins, use an I2C portexpander. This reduces also the wires, if you put it to the switches in the frontplate.
The software is also available for esp32, this would add WIFI/UDP functionality. The code works, but no Webinterface yet.