[Reza’s] methodical investigation of this remote controlled outlet let him patch in with an Arduino using a 433 MHz transmitter. This is a single-device unit, but the techniques used here sho… ...

This is a worthy bookmark, as a resource for wireless comms with Arduino boards. Basically, it's a Wevolver walkthough of Wi-Fi, 4G, LoRa, NB-IoT, and Matter, with example use cases and Arduino ...