Based on esp8266+Blinker+Xiao Ai's IoT WIFI IoT single-channel controller (not LAN), CH340 and micro usb are not used in the project, so the program must be downloaded on the development board in advance , and then the board can be welded superior. The line width is 3mm, but the fuse is a 3A slow-blow type , which can only control electrical appliances below about 500W. There is no 16mm clearance area at both ends of the ESP8266 module antenna, but it is estimated to have little impact on a small board like ours. The power supply part uses the AC-DC5V module bought on Taobao, and the program part is developed using the Arduino+Blinker library. Xiao Ai needs to bind the device to Mijia, and then set the voice command of the specified device in Xiao Ai. That's it. Below is a demonstration video
of PCB front and
PCB back
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