Establish connection for DFU (implementing DFU master over BLE)

RE: Establish connection for DFU (implementing DFU master over BLE)

Son Ha — Mon, 12 Dec 2022 02:05:01 GMT

hi Vincent, I have a relatively similar project with yours. I wonder if I can get your source code for reference please?

Best regards

RE: Establish connection for DFU (implementing DFU master over BLE)

Vincent Smf — Fri, 29 May 2020 13:23:36 GMT

Hello Marjeris,

Could you precise the implementation in sdk11?

Best regards

RE: Establish connection for DFU (implementing DFU master over BLE)

Vincent Smf — Wed, 27 May 2020 13:43:48 GMT

Hello Marjeris,

Nice to hear you. The master DFU use SDK11 and I am looking now for the way to enable Service Changed characteristic in SDK11.

I found the enum SD_BLE_GATTS_SERVICE_CHANGED but I don't know where to enable it (there is no sdk_config.h).

Best regards and thanks for the support

RE: Establish connection for DFU (implementing DFU master over BLE)

Marjeris Romero — Wed, 27 May 2020 09:48:09 GMT

Hi Vincent,

Sorry for the late reply. The DFU master sends a BLE_GAP_EVT_SEC_PARAMS_REQUEST, but the bootloader doesn't support bonding or pairing.

What happens then is that sd_ble_gatts_value_get() returns NRF_ERROR_NOT_FOUND and this gets picked up by APP_ERROR_CHECK, which causes the nRF to reset.

Have you added the Service Changed characteristic on the DFU master? You can do this by changing the NRF_CONFIG macro

#define NRF_SDH_BLE_SERVICE_CHANGED

to 1 in the sdk_config.h file in SDK v16.0.0.

Best regards,

Marjeris

RE: Establish connection for DFU (implementing DFU master over BLE)

Vincent Smf — Wed, 20 May 2020 12:30:16 GMT

One precision, at the moment I loaded only bootloader in the target. After DFU, firmware image is well loaded but I cannot connect again if I try launching an other DFU it does not enter in bootloader within my implementation (work with mobile App).