if you know about rubber ducky, you might also be interested in wifi ducky.
it works on the same basis except you can act in remote via http your bad usb key.
For start, you need the cjmcu 3212 and the best place to get it is HERE:
Once you have it, using your arduino app, you upload this sketch (don t forget to use leonardy as board type and the matching port)
Once that done you need to flash the esp, you can download the 4m binary from here
once you have all these file, follow this tutorial for set your cjmcu in bootloader
you will need this flasher tool in order to flash, you can download it HERE
Once everything is done, remove the wire and upload this SKETCH
et voilà 🙂
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