[Joe] was experimenting with his Arduino when he started thinking about how he could get it to communicate wirelessly with his Android phone. Bluetooth is an option, but it requires some extra ...

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 ...