JDY-23 (JDY23) Low Power Bluetooth Development Board

The purpose of the project
is to use a mobile phone to communicate with Bluetooth, thereby controlling IO, and is compatible with the serial port transparent transmission function
 
schematic diagram. The design
schematic diagram refers to the user manual of JDY-23.
 
PCB design
requires no copper laying under the Bluetooth antenna.
 
The software description
program uses E4A to write mobile APP, which is only suitable for Android systems. The manufacturer provides mobile APP, but on the one hand, it is not compatible with new mobile phones, and on the other hand, the functions are not as comprehensive as mine.
 
Physical display instructions
 
Notes
1. When purchasing a Bluetooth module, be sure to emphasize the need for a Bluetooth module with the "FFE2" function. It is shipped without it by default.
2. It does not have the "FFE2" function by default. I didn't ask the reason clearly, but I always felt that there was something wrong, so I canceled it, so it is recommended to use it with caution.
3. Just solder the pull-downs of both CC wires. If the CC wire fails to provide power, you can remove one. Only one of the CC wires I used should be connected, so I can solder both.
4. There are some errors in the writing of the manual, and some regulations were tested by myself with reference to the documentation.
5. The development board is compatible with the PWM debugging function, but technically it does not have the PWM function.
 
Demo video
station B: https://www.bilibili.com/video/BV1u84y1y7Kx/Explanatory
 
article
CSDN: https://blog.csdn.net/qq_38335331/article/details/128065874
 
Other attachments upload
the mobile phone host computer and source code.