Hello, I am looking for USB shield to connect with arm cortex m3 to communicate through the wireless receiver that receives the signal through wireless Activity detection transmitter store.ncd.io/.../ which detects the motion near the room entrance which automatically switches on the camera for watch over but looking good suggestion to make this kind of solution to process easily.
Why USB shield? It looks like it is using a serial protocoll. So you only need to check if RS232 or TTL. If RS232 you need a level changer to connect to the CM3. But of course _no_ USB to serial cable!