This Module can be used for making a Virtual keyboard or Hacking it has wifi functionality!!
for more info watch this video about another version
this video is a tutorial to show you how flash and install wifi ducky on your cjmcu 3212 and get wifi ducky working.
First sketch to upload:
Flash the bootloader using
Downloading NodeMCU Flasher for Windows
After wiring your circuit, you have to download the NodeMCU flasher. It’s a .exe file that you can download using one of the following links:
the Bin file :
Remove the shunt
then replug the key and using arduino reupload this sketch