its ESP32 (Wemos S2 mini)I love this DIY mentality and the fact that it's stand alone and self contained.
I take it you have an arduino at the heart of that? I sort of recognize that library.
this device works independently as well as it has a pairing mode, the device has a radio module too.
I am working on a controller also which will also have a radio module, planning to make few more devices in future i.e. ATO and DC PowerBar, all the devices will be communicating to the controller via radio.
the ESP32 itself is wifi enabled but I haven't used the wifi yet, only planning to use wifi for OTA updates.
all the logs and results from all the devices will go to controller via radio and then server.
app is also in progress.