I’m new to the community, hope this is the right Category I use here.
I’m planning to make a 2 zone thermostat for my heating, and I would control it with OH (running on Pi4). The question is more about the relay.
So, I’ve already found some relays on the market (china), some with WIFI or with direct USB control.
Actually, I like the idea to control the relay with USB directly from my OH.
I’ve found two types of relay, direct USB and one with HID (driverless) mode.
However, what I’m unsure is that how will I (OH) send the command to the relay through USB?
I’ve checked and found that the commands are in HEX code, but still don’t see the big picture here.
What can you suggest or where could I learn more about this topic?
On the other hand, would you suggest wireless comunication instead?
Thank you for your help!