Remote-controlled prank device

I added a remote recording playback function to a "recorder toy" purchased from Pinduoduo (which can also control servos to turn lights on and off).
Reference: Remote Igniter
Development Environment: Arduino
Manual Download Version:


First, press and hold the BOOT button (i.e., pull the BOOT0 pin high), then


press the RST button


and release the BOOT button.


After downloading, you may need to manually press the RST button to reset and run normally.


Automatic Download Version:

Use a DAPLINK to download

 
the 433 remote control code.
 
Connection Diagram: R is RST, B is BOOT.
 
 
 
Note:

When purchasing surface-mount buttons, make sure they are low-height. Mine was unstable because the height was incorrect. If it's an automatic download version, you don't need to solder the buttons.
The pinouts for the download ports of the manual and automatic download versions are different.
If your remote control cannot match the "far-T2L" code after clearing the code, try connecting their antennas together.