Simple steering gear tester control panel

This module is used to simply test whether the servo function is normal. The main control chip ESP8266EX leads to PWM, and simple testing is performed through the Arduino library.
 
Module description:
 
1. The module has two power input modes, which are Type-C and positive and negative 2p terminals. The terminals are negative and positive from left to right, and the input voltage is 5V, as shown in the red part of the picture above.
2. The module has a switch for controlling power on and off, as shown in the dark green part of the picture above.
3. There is a row of 1x5P binding posts in the lower left corner of the module, which is used to program ESP8266. Please prepare your own TTL programmer and understand the ESP8266 chip programming tutorial in advance. The pin definitions are as shown below from left to right:
 
4. Module It has three buttons, as shown in the light green box in the lower right corner of the picture. The first two switches from left to right are used to switch the output mode, and the rightmost button is used to restart the main control chip. This button is connected to the main control chip. RST pin, please refer to the usage below for specific usage.
 
5. The blue box in the picture is the output terminal of the servo. The pin definition is marked. The output terminal outputs a voltage of 5V. Please ensure that the voltage of the servo is 5V.
 
 
How to use: Please refer to the GIF below. When the power is turned on, the servo will automatically rotate. Press the white button to switch to manual mode. Press the black button to manually rotate 15 degrees. When it reaches 180 degrees, it will return to zero. More details Please refer to the attached procedure.
 
Physical map: