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Bluetooth:Peripheral White List

1 功能概述

通过设置白名单过滤地址对蓝牙连接请求根据设备mac地址进行过滤，在白名单中的则会进行连接请求响应。

2 环境要求

  • board: 支持 BLE 的蓝牙设备

  • uart(option): 用来显示串口log

  • 测试软件: nRF Connect

3 编译和烧录

例程位置：zephyr\samples_panchip\bluetooth\peripheral_white_list

使用 ZAL 工具可以对其进行编译、烧录、打开 VS Code 调试等操作。关于 ZAL 工具的详细介绍请参考：Zephyr APP Launcher 工具介绍。

4 演示说明

  1. 准备1块板卡烧录peripheral_white_list

  2. Try to load HW calibration data.. DONE.
- Chip Type         : 0x80
- Chip CP Version   : None
- Chip FT Version   : 8
- Chip MAC Address  : D0000C0CBBF5
- Chip Flash UID    : 32313334320EAC834330FFFFFFFFFFFF
- Chip Flash Size   : 1024 KB
*** Booting Zephyr OS build zephyr-v2.7.0-1906-g5b63249e  ***
*** llcontroller-v1.0.0-06ff3d90 ***
goon disable
controller initializing....
tx power changed to 0 dBm
Bluetooth initialized
Add to white list success
Advertising successfully started
[00:00:00.001,000] <wrn> bt_hci_core: Failed to set device name (-12)
[00:00:00.071,000] <inf> bt_hci_core: Identity: CA:03:C7:B6:D3:8A (random)
[00:00:00.071,000] <inf> bt_hci_core: HCI: version 5.1 (0x0a) revision 0x0003, manufacturer 0x07d1
[00:00:00.071,000] <inf> bt_hci_core: LMP: version 5.1 (0x0a) subver 0x0000
[00:00:00.076,000] <inf> bt_adv: Start Advertising as CA:03:C7:B6:D3:8A (random)

  3. 此时用nrf connect可以扫描到设备，但是无法去连接设备，因为代码块中的设置的白名单地址默认是和手机不一致的。

    #if (IS_ENABLED(CONFIG_BT_FILTER_ACCEPT_LIST))
bt_addr_le_t whilte_list_addr = {
	.type = BT_ADDR_LE_RANDOM,
	.a = { { 0x47, 0xCF, 0xEE, 0xAC, 0xE6, 0xD4 } },
};
#endif


#if (IS_ENABLED(CONFIG_BT_FILTER_ACCEPT_LIST))

/* adv_param.options |= BT_LE_ADV_OPT_FILTER_SCAN_REQ; */
adv_param.options |= BT_LE_ADV_OPT_FILTER_CONN;

/*此处添加白名单地址*/
err = bt_le_filter_accept_list_add(&whilte_list_addr);

if (err) {
printk("Add to white list failed (err %d)", err);
} else {
printk("Add to white list success\n");
}
#endif

  4. 此时我们可以先将prj.conf文件中的CONFIG_BT_FILTER_ACCEPT_LIST=y设置为CONFIG_BT_FILTER_ACCEPT_LIST=n，此时白名单地址失效，手机是可以连接上设备的，此时设备串口log会打印出手机的蓝牙mac地址。

    Try to load HW calibration data.. DONE.
- Chip Type         : 0x80
- Chip CP Version   : None
- Chip FT Version   : 8
- Chip MAC Address  : D0000C0CBBF5
- Chip Flash UID    : 32313334320EAC834330FFFFFFFFFFFF
- Chip Flash Size   : 1024 KB
*** Booting Zephyr OS build zephyr-v2.7.0-1906-g5b63249e  ***
*** llcontroller-v1.0.0-06ff3d90 ***
goon disable
controller initializing....
tx power changed to 0 dBm
Bluetooth initialized
Advertising successfully started
delta:3 = next-current[00:00:00.001,000] <wrn> bt_hci_core: Failed to set device name (-12)
[00:00:00.071,000] <inf> bt_hci_core: Identity: CA:11:98:25:E4:B1 (random)
[00:00:00.071,000] <inf> bt_hci_core: HCI: version 5.1 (0x0a) revision 0x0003, manufacturer 0x07d1
[00:00:00.071,000] <inf> bt_hci_core: LMP: version 5.1 (0x0a) subver 0x0000
[00:00:00.075,000] <inf> bt_adv: Start Advertising as CA:11:98:25:E4:B1 (random)

Connected: [Init DEVICE]: 5A:A8:13:05:0E:8B (random) /*手机蓝牙Mac地址*/

  5. 此时我们将代码中的过滤白名单mac地址重新设置为手机蓝牙mac地址，在prj.conf文件中重新使能CONFIG_BT_FILTER_ACCEPT_LIST=y白名单过滤配置，然后重新下载设备即可正常接收手机蓝牙连接请求。

#if (IS_ENABLED(CONFIG_BT_FILTER_ACCEPT_LIST))
bt_addr_le_t whilte_list_addr = {
	.type = BT_ADDR_LE_RANDOM,
	.a = { { 0x8B, 0x0E, 0x05, 0x13, 0xA8, 0x5A} }, /*注意此处设置白名单蓝牙mac要使用倒序，因为该芯片为小端模式*/
};
#endif

5 RAM/Flash资源使用情况

Memory region         Used Size  Region Size  %age Used
FLASH:       85476 B       384 KB     21.74%
SRAM:       28026 B        50 KB     54.74%