You need to flash the firmware in the attachment! ! ! , only a small amount supports this definition, most of them need to re-flash the firmware.
Two firmwares, the second += key can be used, and then there are some small changes
The picture is the first firmware
An unknown Bluetooth keyboard motherboard uses the AB1112 chip. The key core of a tablet keyboard I bought before happened to be usable, so I disassembled the key core and drew a schematic diagram. I was also lucky, one of the two pieces supported me. This key core is the key to successful pairing.
The firmware is not complicated either. You can try changing it to your own key core.
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