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Bluetooth Low Energy Chipset problem

Epic Vancouver
Intellectual 885 points

Other Parts Discussed in Thread: CC2540

I am working on the CC2540 BLE evaluation kit, and it was working fine - no problem in device discovery, connection establishment, value writing to the handle, or key press detection from the remote control key fob.  For some reason, after programming it for few days, the USB Dongle module behaves strangely. Now it can only discover device and establish a connection, but fails to write a value to the USB dongle. The BTool error message was "Invalid Parameter"

when I tried to write a value of "01:00" to the handle of 0x0020 (setting the USB dongle to a notification mode.) With such problem, the USB dongle won't be able to listen to the keyfob's notification message. Can you think of any cause to this value writing problem in the dongle?

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    TI__Genius 17975 points

    Have you modified the software on either the dongle or the keyfob?

     

    Also, do you know if the battery that you are using is good? I've never seen the specific behavior that you describe, but if you are using a battery that is low it may cause strange behavior.