Bluetooth: Multi-roles¶
1 功能概述¶
此项目演示了蓝牙多角色的功能。可以通过 zephyr shell 控制设备执行广播、扫描、连接（主和从）等。
2 环境要求¶
board: pan108xxb5_evb
uart: 显示串口log和shell交互
测试软件：SecureCRT，用于 shell 交互
测试软件 (option): nRF Connect
执行多连接时，需要多个支持蓝牙的设备。
3 编译和烧录¶
例程位置：zephyr\samples_panchip\bluetooth\mult_roles
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¶
4.1 启动广播¶
uart:~$ ble adv conn_ind_start
Advertising successfully started
4.2 启动扫描¶
uart:~$ ble scan passive_start
Scanning successfully started
uart:~$ 00 > 37:09:A7:33:53:B6 (random) (RSSI -98) (ADV_NONCONN_IND)
01 > 39:E9:F4:88:25:21 (random) (RSSI -95) (ADV_NONCONN_IND)
02 > 3B:2C:F8:A6:0D:85 (random) (RSSI -95) (ADV_NONCONN_IND)
03 > 25:A0:8B:A9:CE:CB (random) (RSSI -98) (ADV_NONCONN_IND)
04 > 1A:E1:B2:2D:BC:1A (random) (RSSI -94) (ADV_NONCONN_IND)
05 > 74:AC:D5:CF:97:3A (random) (RSSI -92) (ADV_IND)
06 > 0A:6F:3B:F4:FC:77 (random) (RSSI -93) (ADV_NONCONN_IND)
07 > 00:20:21:05:27:FF (public) (RSSI -92) (ADV_IND)
08 > BB:CA:11:20:00:06 (public) (RSSI -91) (ADV_IND)
09 > 01:95:C8:38:2E:C1 (random) (RSSI -81) (ADV_NONCONN_IND)
10 > 7B:7B:2B:BD:A7:BA (random) (RSSI -81) (ADV_NONCONN_IND)
11 > 3E:18:64:B8:8A:B4 (random) (RSSI -92) (ADV_NONCONN_IND)
12 > 26:D1:B3:49:78:A5 (random) (RSSI -92) (ADV_NONCONN_IND)
13 > 12:1D:7C:92:53:B1 (random) (RSSI -85) (ADV_NONCONN_IND)
14 > 64:D6:45:C8:ED:3C (random) (RSSI -86) (ADV_IND)
15 > FF:FF:FF:FF:FF:FF (public) (RSSI -75) (ADV_IND)
16 > 21:88:3B:73:56:62 (random) (RSSI -94) (ADV_NONCONN_IND)
17 > 2B:46:04:9D:A9:08 (random) (RSSI -88) (ADV_NONCONN_IND)
18 > 1A:A0:5E:42:34:6E (random) (RSSI -88) (ADV_NONCONN_IND)
19 > 4E:E5:97:61:EB:3B (random) (RSSI -88) (ADV_IND)
需要注意的是：
当前可以存储20条设备信息，当扫描到的设备信息存储满时，将自动终止扫描。
发起连接（
ble conn create）时如果当前处于扫描状态，则会终止扫描后启动连接
4.3 显示设备信息¶
显示扫描、连接设备列表信息。
uart:~$ ble devs show
Detected List:
00 > 37:09:A7:33:53:B6 (random) (RSSI -98) (ADV_NONCONN_IND)
01 > 39:E9:F4:88:25:21 (random) (RSSI -95) (ADV_NONCONN_IND)
02 > 3B:2C:F8:A6:0D:85 (random) (RSSI -95) (ADV_NONCONN_IND)
03 > 25:A0:8B:A9:CE:CB (random) (RSSI -98) (ADV_NONCONN_IND)
04 > 1A:E1:B2:2D:BC:1A (random) (RSSI -94) (ADV_NONCONN_IND)
05 > 74:AC:D5:CF:97:3A (random) (RSSI -92) (ADV_IND)
06 > 0A:6F:3B:F4:FC:77 (random) (RSSI -93) (ADV_NONCONN_IND)
07 > 00:20:21:05:27:FF (public) (RSSI -92) (ADV_IND)
08 > BB:CA:11:20:00:06 (public) (RSSI -91) (ADV_IND)
09 > 01:95:C8:38:2E:C1 (random) (RSSI -81) (ADV_NONCONN_IND)
10 > 7B:7B:2B:BD:A7:BA (random) (RSSI -81) (ADV_NONCONN_IND)
11 > 3E:18:64:B8:8A:B4 (random) (RSSI -92) (ADV_NONCONN_IND)
12 > 26:D1:B3:49:78:A5 (random) (RSSI -92) (ADV_NONCONN_IND)
13 > 12:1D:7C:92:53:B1 (random) (RSSI -85) (ADV_NONCONN_IND)
14 > 64:D6:45:C8:ED:3C (random) (RSSI -86) (ADV_IND)
15 > FF:FF:FF:FF:FF:FF (public) (RSSI -75) (ADV_IND)
16 > 21:88:3B:73:56:62 (random) (RSSI -94) (ADV_NONCONN_IND)
17 > 2B:46:04:9D:A9:08 (random) (RSSI -88) (ADV_NONCONN_IND)
18 > 1A:A0:5E:42:34:6E (random) (RSSI -88) (ADV_NONCONN_IND)
19 > 4E:E5:97:61:EB:3B (random) (RSSI -88) (ADV_IND)
Connected List:
- Empty
4.4 与设备建立连接¶
在与设备建立连接时，需要先获取待连接设备的编号，可以通过 ble devs show 获取。
如下命令，表示将与 Detected List列表中编号为05的设备建立连接:
uart:~$ ble conn create 5
Connecting ...
uart:~$ Connect to 74:AC:D5:CF:97:3A (random) successful
5 其它说明¶
5.1 配置¶
项目配置文件: prj.conf，其中包含了 Bluetooth、shell、debug等的一些配置。
其中支持的最大连接数量由如下参数配置：
CONFIG_BT_MAX_CONN=8
5.2 shell 命令¶
shell 支持的 ble 命令
ble - BLE commands
Subcommands:
adv :LE Advertising commands
Subcommands:
conn_ind_start :LE Start Advertising with ADV_IND command
nonconn_ind_start :LE Start Advertising with ADV_NONCONN_IND command
stop :LE Stop Advertising command
scan :LE Scanning commands
Subcommands:
passive_start :LE Start Passive Scanning command
active_start :LE Start Active Scanning command
stop :LE Stop Scanning command
conn :LE Connection commands
Subcommands:
create :LE Create Connection command
disconn :Disconnect command
devs :LE Device Status commands
Subcommands:
show :Display BLE Devices command
clear :Clear Detected List command
reset :Reset commands
6 RAM/Flash资源使用情况¶
Memory region Used Size Region Size %age Used
FLASH: 116068 B 256 KB 44.28%
SRAM: 49040 B 50 KB 95.78%