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New user's Keyfob powerup question

Mark Hinds
Prodigy 90 points
Other Parts Discussed in Thread: BLE-STACK, CC2540

My first post; hopefully in the correct location: 

I have been given a 2540 Mini DK including a 2540-based Keyfob, and am looking for an explanation for an apparent Keyfob startup anomaly.

Background details:  The user’s guide “Bluetooth® Low Energy CC2540/41 Mini Development Kit User’s Guide”; Document Number: SWRU270C; Document Version: 1.2; says on page 10 that “When you insert the CR 2032 battery, the LED will be lit green for one second.”  While this was true when I received it, I have since re-flashed it with the binary “CC2540_keyfob_SimpleBLEPeripheral.hex” from the “BLE-Stack 1.3.1” installation.  Since 1.3.1 is the latest on TI’s website, I assume that I am flashing the latest firmware.  The Keyfob itself is identified by a label with “Rev: 1.1.1 SN: 000024ED”, and does in fact have a CC2540 on it.  The CR2032 battery shows an open circuit voltage of 2.92V; the Keyfob battery contacts have been cleaned, the device does communicate with the Debugger (apparently can be flashed, etc.), and BTool shows it connecting to the USB Dongle (I haven’t gotten much farther than that yet). 

So, after all that, does anyone know why I am not seeing the green LED flash on startup?  Does this matter, and if not, why not?  I am concerned that either the hardware may have been damaged, or that there is a hardware/firmware mismatch here. 

Thanks in advance,

Mark Hinds

  • 0
    Prodigy 90 points

    Looking further into the documentation, it seems likely that I have installed the wrong sample application in the Keyfob, and this in turn probably explains the anomaly.  I should have flashed it with the KeyFobDemo binary.  So all I have to do is figure out where the installer put that binary, and what it's name is.  Possibly it's the file named "CC2540MiniDkDemoSlave.hex"?

    MH

  • 0 in reply to Mark Hinds
    Guru 22270 points

    Hello Mark,

    There were also some other changes to the KeyFob firmware.  In advertising mode, the device will blink the LED.

    You can always compile the KeyFob project itself and download it using IAR.

    Thanks,