Unique BLE device name

RE: Unique BLE device name

Guillaume Levant — Wed, 14 Sep 2016 09:42:23 GMT

Thanks Alex, I'll use deviceid !

RE: Unique BLE device name

Guillaume Levant — Wed, 14 Sep 2016 09:41:10 GMT

Thanks for your answer, instead of using BLE address I will use device id which tend to be more unique. But anyway I use your code as a template :)

RE: Unique BLE device name

Alex — Tue, 13 Sep 2016 13:28:57 GMT

Just a reminder that MAC address is not guaranteed to be unique although in most cases it is more than enough. If you need really unique number then use NRF_FICR->DEVICEID[0], NRF_FICR->DEVICEID[1]

RE: Unique BLE device name

Christopher — Tue, 13 Sep 2016 13:15:00 GMT

If you want to add the Bluetooth address (or some bytes) at the end of the advertising name of your device, you should do something like this:

#define DEVICE_NAME           "<name>"
#define DEVICE_NAME_MAX_SIZE  18

// Append the two MSB of the BLE address, for instance
// - BLE address  = AB:CD:XX:XX:XX:XX
// - BLE ADV name = <name> ABCD

char device_name[DEVICE_NAME_MAX_SIZE];
uint8_t name_size = strlen(DEVICE_NAME);

memcpy(device_name, DEVICE_NAME, name_size);

// Encode the BLE address as a String and set the advertising name
sprintf(&device_name[name_size], " %X%X", addr.addr[BLE_GAP_ADDR_LEN - 1], addr.addr[BLE_GAP_ADDR_LEN - 2]);
uint32_t errCode= sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *) device_name, name_size + 5);
APP_ERROR_CHECK(errCode);

You can use the sprintf function to format the advertising name as you like.

RE: Unique BLE device name

Guillaume Levant — Tue, 13 Sep 2016 13:02:37 GMT

Thanks for your comment, I added the errors in the main post ;)

RE: Unique BLE device name

Wojtek — Tue, 13 Sep 2016 12:58:51 GMT

"the code doesn't compile" any errors? also:

ble_gap_addr_t *p_addr;
sd_ble_gap_address_get(p_addr);

should be:

ble_gap_addr_t p_addr;
sd_ble_gap_address_get(&p_addr);

so there is some memory reserved for that address... change the rest of the code according to the changed type.