I was wondering if anyone ever tested bluetooth accessories in a low level way.
Any advice of testing or any tool that may help with it.
Hello @pedrohdiniz and Welcome!
I have not tested bluetooth accessories but I a little familiar with the technology. One method would be to build a test fixture so you can send any command to the accessory-under-test.
The test fixture would combine a bluetooth module (something like this) with microcontroller (I favor an Arduino but there are others). With a bit of code, the fixture could connect and issue commands for happy path and error paths.
If you are still learning to solder or to code, perhaps your developers could help. It is a testability challenge!