[Training Camp_Advanced Class] Tmall Elf Socket/Switch

Introduction to functions and features:

1. Connect to the IoT switch controllable by Alibaba Cloud platform Tmall Genie and mobile APP through WIFI.
2. The size is 65*45mm, and the overall size is small, which is conducive to cost control in the later stages of the product.
3. The board is designed with a 5V active output function (short-circuit cap), which can be used to drive some low-voltage devices, such as small water pumps for watering flowers.
4. The relay circuit is windowed to increase the carrying capacity of large currents through post-tin plating.
5. The 220V power supply terminal is designed with a 2A/250V fuse to eliminate hidden dangers~~~~
6. The relay is designed with optocoupler isolation to protect the MCU, and the coil is connected in reverse parallel with the diode to prevent the impact on the power supply when opening and closing~
7. Designed to isolate high-voltage independent buttons, users can turn on or off manually by pressing the button when on site
8. The design retains the temperature sensor for temperature collection, which is suitable for automatically opening the ventilation system of the greenhouse when the temperature is high.
9. It can be powered through the Android port and programmed for debugging. At the same time, it also leads to pin header terminals to facilitate expansion of battery power supply.
10. The input end of the power supply is designed with a self-restoring fuse, which can protect the product to a certain extent.