Hi, I think I saw somewhere the amount of Relay Boards you can stack on top of each other and give them different addresses with the dip switches, but I can’t seem to find the information now. We have three of these relay boards and it would be nice to find this information if our need for the relay count grows. In short, how many relay boards can Raspberry PI reliably control?
Here are the relay borards that can support Raspberry Pi, Pls have a look.
I hope the information can help.