I made simple remote power switch over Wi-Fi. The heart of this box is D1 mini board based on ESP2866 MCU. Board is powered by 5V power supply extracted from old mobile charger. The relay border contain relay power by 5V and switch up-to 230V and 10A. Simple Arduino code contains connection to Wi-Fi AP, simple TCP server listening on port 80 and receiving GET HTTP requests. The box can only switch on-off the 230V power or return status of relay and Wi-Fi connection. I used it for controlling outdoor Christmas LED lights.
I also plane add light sensor and add some schedule for switching. Next idea is to rebuild this to 12V, connect to solar panel with battery and power the LED lights directly…
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