I have a serious problem with Grove Serial Bluetooth module. I tried to pair module with Mac, Windows and even a Ubuntu machine but without success. I can see the module name in the device discovery tool on my PC but any attempt to pair device fails.
- I’m using slave example code. I tried to use master code and I was able to see my PC from that module but attempt to connect from the module to the PC fails because it does not accept pin.
- Sometimes I’m able to “pair” module with my PC but the module is immediately disconnected and red and green LEDs are flashing even if PC reports module as paired.
- Red and green LEDs are flashing all the time
- Bluetooth discovery tools reports that the module has no available services. That means it does not offer SPP as it should. This is very strange.
I tried everything possible and I’m almost certain that is something wrong with the module. Is it possible that this module is defective or has some firmware flaw?
After configuring module via AT commands over console I was able to pair module with Mac. However the device still does not support SPP so it’s impossible to connect. Same for Windows machine.