Uses an Esp12-e to relay control an existing light switch via WiFi. Intended as a 3 way RETROFIT becuase it utilizes a HiLink PM03 power module to provide regulated power for the relay AND the Esp12-e.
The advantage of using the SPDT relay is obvious in the event of communication/network failure. 3-way will still allow the use of the "standard" physical switch control.
The relay is limited to a MAXIMUM of 125 volts AC at 2 amps, and added a 3amp micro-fuse for safety.
I have successfully made several of these circuits,
programmed using Tasmota firmware,
loaded using Arduino IDE.