ESP01S Switch Module

This is an IoT switch module using the ESP01S as its control core. The module has the following features: 1. It uses a wide-range DC power input design, supporting DC power supplies below 100V, with a recommended range of 10-90V DC power. 2. It provides rich sensor access interfaces (UART interface, IO interface), supporting photosensitive sensor modules, human body sensor modules, etc. 3. It utilizes components from the LCSC basic library as much as possible for easy prototyping and surface mount technology.
 
1. Working principle
      : A 12V power supply is provided by a DC-DC converter to control the MOSFET switch, while an LDO provides operating power to the ESP01S. The ESP01S's IO0 pin controls the MOSFET switch; a low level turns the MOSFET on, and a high level turns it off.
The ESP01S's IO2 pin serves as the sensor access pin; the sensor status is determined by reading the IO port's level.
 
2. Wiring is as follows:
3. Test conditions:
      a. Power input: 10-30V switching power supply.
      b. Load: 12W DC light bulb.
      c. Sensor module: 2.4G human body sensor module.
Based on the above conditions, the module works normally.
The Home Assistant integration effect is as follows:
 
4. Regarding firmware:
      Firmware development can be done using Arduino or ESPHOME. Since firmware development is relatively simple, it is recommended to develop it yourself according to the schematic diagram.
      If you want to test the firmware, you can join group 838630818 to download it. The firmware is for testing purposes only.