CRC for nRF8001 Setup Message

[Jason]

Hi,

I have a problem in CRC of setup message for nRF8001, and I already try the CCITT-16 algorithm with below conditions:

Poly = 0x1021, Init = 0xFFFF, Ignore all Zero, exclude last 2 bytes

but still got an incorrect CRC16 value.

Could you please provide more CRC details or source code for me?

Cheers, JASON

[David Edwin]

You can use the project ble_modify_setup_data which provides you an example to modify the setup and generate the correct CRC. The documentation for this in in the /documentation/libraries/BLE/examples/ble_modify_setup_data folder See devzone.nordicsemi.com/arduino for the current beta release.

[C. Bertolini]

Hi, I also have a problem of "CRC mismatch" during nRF8001 setup data loading. The nRF8001 seems to read the configuration fine except it throws a "ACI_STATUS_ERROR_CRC_MISMATCH" in the end. I am using Arduino SDK and the "ble_heart_rate_template" example, nRF8001 D chip.

Below is the verbose output of ACI library.

Why is nRF8001 throwing this error?

Cheers, Clément.

ACI lib verbose output:

Arduino setup
 E4 :4, 81, 2, 0, 2,
Evt Device Started: Setup
C7 :7, 6, 0, 0, 3, 2, 41, FE,
[...]
 E3 :3, 84, 6, 1,
 E3 :3, 84, 6, 88,
ACI Status of ACI Evt Cmd Rsp 0x88
ACI Command 0x6
Evt Cmd respone: Error. Arduino is in an while(1); loop

[David Edwin]

Can you post it as a separate question. Your posts will not get noticed if you post it to an already accepted answer.

[vivyadavalli]

Clement,

Did you get past this stage above? how exactly did you manage that? Any sharing of information is highly appreciated as I'm stuck with exact same issue in setup stage.