In order to use the ESP-01 Wi-Fi relay module, a programmer/programming adapter is required to program the ESP-01 module (see below). Also it is pretty easy to make your own programmer, or you can ...

From the circuit diagram of the module, it is clear that, apart from the module only a few external components are needed to build a relay-driver circuit. Yes, there is a chance to realize one simple ...

It works as a cross-platform support module, therefore it may be used with Raspberry Pi, BeagleBone, Arduino, Banana Pi, Jetson Nano, and other platforms.” ...