WIFI remote control transmitter module (8266 PPM acquisition)

This design draws inspiration from two open-source projects: "Xiaomozi's" "Potato Remote Control 4G Remote Control Car" (https://oshwhub.com/xiaomozi/tu-dou-fa-she-ji-3-0) and "LE12138's" "Le Remote Control 2.0 | RC Remote Control Converted to 4G Remote Control" (https://oshwhub.com/LE12138/1f51ac624d2742d7a845f79a25eda0b2)  
, with slight hardware modifications.
The matching WIFI remote control receiver module is linked here: https://oshwhub.com/myself1820/wifi-yuan-cheng-yao-kong-mo-kuai-fa-she-he-jie-shou
Main circuit functions
: (1) Integrated lithium battery charging circuit, 1S lithium battery power supply
(2) 3.5mm headphone jack for receiving PPM signal (corresponding to IO14 of 8266)
(3) All IO ports are brought out, and the PWM signal of the model aircraft remote control receiver can be connected in.
(4) Reserved serial port for downloading and debugging.
(5) Reserved I2C interface for connecting an external OLED screen
(6) Two onboard buttons, one is a reset button, and the other is used for network configuration (or other functions)
(7) 1-channel ADC for collecting battery voltage.
 
Project pictures
 
Other instructions
The program is directly burned into the potato remote control 4G remote control car code (remote control end) of the "xiaomozi" master mentioned above. I will not put it here.