thanks for the advise for sure I will remeber that. In my current project will be hard to implement as I have no spare GPIO pins on NanoPi Duo2 :-)
All are consumed by two hats from you (1Wire and MCP23017) and SPI controlled Waweshare e-paper.
The project is remote (via internet) heating controller for my yacht allowing me to measure temperature inside cabins, outside, on hotair ducts (just for fun and analyses), regardless of web interface it has the e-paper display. And I can remotely switch on/off heating and fans on my boat. Imagine going to marina on cold autumn day and the boat is waiting warm and cosy.
So now every components are working as expected - it's time for custom PCB . Whole device will be very tiny - half size of cigarettes box - in 3D printed case.
And sorry for spamming, but I'm so excited so I cant resist ....