Setting nRF5340 Public BLE Address

RE: Setting nRF5340 Public BLE Address

Tyler Grunenwald — Tue, 31 Oct 2023 17:32:26 GMT

Yes, here is my main() code:

int main(void)
{
	int err;

	printk("Starting Beacon Demo\n");

	/* Initialize the Bluetooth Subsystem */
	err = bt_enable(NULL);
	if (err) {
		printk("Bluetooth init failed (err %d)\n", err);
		return err;
	}

	set_bd_addr();

	start_advertising();
	return 0;
}

I've also started a new ticket here for my specific issue. There is a sample project attached.

RE: Setting nRF5340 Public BLE Address

Sigurd — Tue, 31 Oct 2023 16:05:06 GMT

[quote userid="123188" url="~/f/nordic-q-a/92583/setting-nrf5340-public-ble-address/453150"] It logs that the address was successfully updated, but still advertises with the original address (CE:35:AB:AC:91:C4).[/quote]

Did you first change the address, and then started the advertising ?

RE: Setting nRF5340 Public BLE Address

Tyler Grunenwald — Mon, 30 Oct 2023 21:33:15 GMT

I have tried adding this to the beacon sample in NCS 2.4 with an nRF5340.

Unmodified beacon sample advertises with address CE:35:AB:AC:91:C4 (random)

When, I add these snippets. It logs that the address was successfully updated, but still advertises with the original address (CE:35:AB:AC:91:C4).

My prj.conf:

CONFIG_BT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_DEVICE_NAME="Test beacon"

CONFIG_BT_HCI_VS=y
CONFIG_BT_HCI_VS_EXT=y

Am I missing configs?
Is there an updated way to change the address?

RE: Setting nRF5340 Public BLE Address

tchag — Wed, 05 Oct 2022 14:28:29 GMT

Thanks for the prompt response

I have removed the "CONFIG_BT_LL_SW_SPLIT=y from prj.conf" but still no change in MAC address.
but I have added the snippet to the one of the sample(ncs) and it worked right of the box.

I will check my application and check why its not updating in my application and get back to you if I have any questions

RE: Setting nRF5340 Public BLE Address

Sigurd — Wed, 05 Oct 2022 14:08:27 GMT

Hi,

I tested using the SoftDevice Controller. Try removing CONFIG_BT_LL_SW_SPLIT=y from prj.conf

RE: Setting nRF5340 Public BLE Address

tchag — Wed, 05 Oct 2022 14:02:37 GMT

Thank you for sharing the snippet but I have tried by adding the above snippets but unsuccesful,
Do I need to enable any symbols in .conf file?

Here is my code snippets and .conf file. Could you please confirm if anything I have missed adding

#include <zephyr/bluetooth/hci.h>
#include <zephyr/bluetooth/hci_vs.h>
#include <sdc_hci_vs.h>

static int set_bd_addr(void)
{
	int err = 0;
	struct net_buf *buf;
	sdc_hci_cmd_vs_zephyr_write_bd_addr_t *cmd_params;

	buf = bt_hci_cmd_create(SDC_HCI_OPCODE_CMD_VS_ZEPHYR_WRITE_BD_ADDR ,
				sizeof(*cmd_params));
	if (!buf) {
		printk("Could not allocate command buffer\n");
		return -ENOMEM;
	}

	cmd_params = net_buf_add(buf, sizeof(*cmd_params));

	cmd_params->bd_addr[0]= 0xCC;
	cmd_params->bd_addr[1]= 0xCC;
	cmd_params->bd_addr[2]= 0xCC;
	cmd_params->bd_addr[3]= 0xCC;
	cmd_params->bd_addr[4]= 0xCC;
	cmd_params->bd_addr[5]= 0xCC;

    printk("bt_hci_cmd_send_sync \n");

	err = bt_hci_cmd_send_sync(SDC_HCI_OPCODE_CMD_VS_ZEPHYR_WRITE_BD_ADDR, buf, NULL);
	printk("err: %d \n",err);
	if (err) {
		printk("err: %d \n",err);
		return err;
	}

	printk("Successfully set bd addr \n");

	return 0;
}

void ble_init()
{
    int  err;
	
    err = bt_enable(NULL);
	if (err) {
		printk("BLE enabling failed (err %d)\n", err);
	}

	set_bd_addr();

	err = bt_ready(err);
	if (err) {
		printk("BLE initialized failed (err %d)\n", err);
	}

prj.conf file

CONFIG_SERIAL=y     

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=n
CONFIG_LOG_BACKEND_RTT=n
CONFIG_LOG_BACKEND_UART=n

CONFIG_ASSERT=n
CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_SMP=y
CONFIG_BT_DEVICE_NAME="adv"
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2
CONFIG_BT_DEVICE_APPEARANCE=833

CONFIG_BT_GATT_DM=y
CONFIG_BT_GATT_CLIENT=y

CONFIG_KERNEL_MEM_POOL=y
CONFIG_HEAP_MEM_POOL_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

CONFIG_DK_LIBRARY=y

# Power management
CONFIG_PM=n

CONFIG_BT_DATA_LEN_UPDATE=y


CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_USER_PHY_UPDATE=y
CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n
CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_L2CAP_TX_BUF_COUNT=10
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y

CONFIG_BT_THROUGHPUT=n

CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_CONN_PARAM_UPDATE_TIMEOUT=300

CONFIG_BT_HCI_VS=y
CONFIG_BT_HCI_VS_EXT=y

CONFIG_BT_CTLR=n
CONFIG_BT_LL_SW_SPLIT=y

child_image/hci_rpmsg.conf

CONFIG_BT=y
CONFIG_BT_HCI_RAW=y
CONFIG_BT_MAX_CONN=10
CONFIG_BT_CTLR_ASSERT_HANDLER=y
CONFIG_BT_HCI_RAW_RESERVE=1
CONFIG_BT_BUF_CMD_TX_COUNT=10


CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_MAX_CONN=2

RE: Setting nRF5340 Public BLE Address

Sigurd — Wed, 05 Oct 2022 11:40:18 GMT

Hi,

[quote user=""]Method 2: using bt_hci_cmd_create and bt_hci_cmd_send_sync but there were no build errors but when I flash the application, MAC address doesn't get updated.[/quote]

I tested it here, and it works fine. Some code snippets:

Snippet 1:

 #include <zephyr/bluetooth/hci.h>
#include <sdc_hci_vs.h>

static int set_bd_addr(void)
{
	int err = 0;
	struct net_buf *buf;
	sdc_hci_cmd_vs_zephyr_write_bd_addr_t *cmd_params;

	buf = bt_hci_cmd_create(SDC_HCI_OPCODE_CMD_VS_ZEPHYR_WRITE_BD_ADDR ,
				sizeof(*cmd_params));
	if (!buf) {
		printk("Could not allocate command buffer\n");
		return -ENOMEM;
	}

	cmd_params = net_buf_add(buf, sizeof(*cmd_params));

	cmd_params->bd_addr[0]= 0xCC;
	cmd_params->bd_addr[1]= 0xCC;
	cmd_params->bd_addr[2]= 0xCC;
	cmd_params->bd_addr[3]= 0xCC;
	cmd_params->bd_addr[4]= 0xCC;
	cmd_params->bd_addr[5]= 0xCC;



    printk("bt_hci_cmd_send_sync \n");

	err = bt_hci_cmd_send_sync(SDC_HCI_OPCODE_CMD_VS_ZEPHYR_WRITE_BD_ADDR, buf, NULL);
	printk("err: %d \n",err);
	if (err) {
		printk("err: %d \n",err);
		return err;
	}

	printk("Successfully set bd addr \n");

	return 0;
}

Snippet 2:

	err = bt_enable(NULL);
	if (err) {
		error();
	}

	LOG_INF("Bluetooth initialized");

	k_sem_give(&ble_init_ok);

	set_bd_addr();