I have read the relevant topics (I hope so), but I could not find the solution.
I need to control 32 relays from Domoticz. Since it will be an essential part of a heating system, it needs to operate reliably for years. So I would connect 2 of 16 relay modules to the Raspberry Pi 3. The question is how?
I have some SN74HC595N shift registers in the drawer. Can I use them to multiply the output ports? But how can I control them from Domoticz?
Or should I use am Arduino Meg2560 and communicate with it through serial?
Has anyone some experience with a problem like this?
Thanks!
