Local BLE Address getting erased after flash and random address is showing instead

RE: Local BLE Address getting erased after flash and random address is showing instead

Nagma — Tue, 21 Dec 2021 11:38:59 GMT

Alright, thank you. I will look into it. Happy holidays and Happy new year!

RE: Local BLE Address getting erased after flash and random address is showing instead

Simonr — Tue, 21 Dec 2021 11:20:47 GMT

You can check out the IPSP initiator example in the nRF5 SDK for an example of how to set the BLE_GAP_ADDRESS to as a PUBLIC type.

Best regards,

Simon

PS: We will be short on staff during the Holiday period, and delayed replies must be expected. We will be back to full staff on January 3rd. Happy holidays and happy new year!

RE: Local BLE Address getting erased after flash and random address is showing instead

Nagma — Mon, 20 Dec 2021 14:21:46 GMT

Yes, I am talking about Bluetooth Device address . We are using NINA B111 BLE Chip.

void set_addr(void)
{
  uint32_t err_code;
  ble_gap_addr_t my_addr;
  err_code = sd_ble_gap_addr_get(&my_addr);
  APP_ERROR_CHECK(err_code);



  my_addr.addr_type = BLE_GAP_ADDR_TYPE_PUBLIC;
 
  memcpy((uint8_t *)my_addr.addr, (uint8_t *)(NRF_UICR + 0x0080), BLE_GAP_ADDR_LEN);

  

  err_code = sd_ble_gap_addr_set(&my_addr);
  APP_ERROR_CHECK(err_code);

}

I have tried to set address using sd_ble_gap_addr_set() following few posts here. Is this the right way to do it?

RE: Local BLE Address getting erased after flash and random address is showing instead

Simonr — Mon, 20 Dec 2021 13:59:58 GMT

I assume you are referring to the BLE GAP address here, or what? If so, it sounds like you've set the address type to a random one so that it will be randomized after flashing the device. If you're referring to something else, can you specify what address this is?

In order to save something between flashes, you need to store it in the UICR page, which shouldn't be erased when the device is programmed.

Best regards,

Simon