Retrieve BLE MAC address in Zephyr environment

RE: Retrieve BLE MAC address in Zephyr environment

LongQi — Thu, 11 Jul 2024 06:03:53 GMT

Einar Thorsrud Could you help to update the link? It's 404 now.

RE: Retrieve BLE MAC address in Zephyr environment

EthanJia — Tue, 14 Feb 2023 09:29:35 GMT

Yes, you are exactly right about this!

After verification, this OR operator is necessary. Hope others would be aware of this.

RE: Retrieve BLE MAC address in Zephyr environment

DataMate — Wed, 30 Nov 2022 20:24:07 GMT

Line 7 should be mac_address[0] = part_1[1] | 0xC0;

According to the BLE spec on valid MAC addresses, in Core Spec 5.3, Vol 6, Part B, Chapter 1.3.2.1, the two most significant bits of the address must be equal to 1 for a static device address. If you don't do this, it will not match what you get with the bt_read_static_addr function.

RE: Retrieve BLE MAC address in Zephyr environment

Einar Thorsrud — Tue, 15 Jun 2021 07:40:17 GMT

Hi,

You can use bt_id_get() or bt_le_oob_get_local() as mentioned in the example code in Developing Bluetooth Applications or get it from FICR as allready suggested provided the default random static address is used.

RE: Retrieve BLE MAC address in Zephyr environment

smackenzie — Mon, 14 Jun 2021 23:11:12 GMT

I was looking for this too. My solution was using the ficr.

static void get_mac_address(uint8_t mac_address[6]) {
	unsigned int device_addr_0 = NRF_FICR->DEVICEADDR[0];
	unsigned int device_addr_1 = NRF_FICR->DEVICEADDR[1];
	const uint8_t* part_0 = reinterpret_cast<const uint8_t*>(&device_addr_0);
	const uint8_t* part_1 = reinterpret_cast<const uint8_t*>(&device_addr_1);
	mac_address[0] = part_1[1];
	mac_address[1] = part_1[0];
	mac_address[2] = part_0[3];
	mac_address[3] = part_0[2];
	mac_address[4] = part_0[1];
	mac_address[5] = part_0[0];
}