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[BlueZ] 2、使用bluetoothctl搜索、连接、配对、读写、使能notify蓝牙低功耗设备

星期三, 05. 九月 2018 02:03上午 - beautifulzzzz

1、前言

上一篇讲了如何编译安装BlueZ-5,本篇主要在于玩BlueZ,用命令行去操作BLE设备:

[BlueZ] 1、Download install and use the BlueZ and hcitool on PI 3B+

2、gatttool —— 老工具趟坑

刚开始跟着 Get Started with Bluetooth Low Energy on Linux 操作gatttool,发现坑太多(主要原因是工具老了):

采用sudo gatttool -b 4D:69:98:0E:91:5E -I去连接发现会报错:Error: connect error: Connection refused (111)最终参考LINK-11发现需要加random选项(#1)

➜ ~ sudo gatttool -b 4D:69:98:0E:91:5E -I[4D:69:98:0E:91:5E][LE]> connectAttempting to connect to 4D:69:98:0E:91:5EError: connect error: Connection refused (111)[4D:69:98:0E:91:5E][LE]> exit➜ ~ sudo gatttool -t random -b 4D:69:98:0E:91:5E -I[4D:69:98:0E:91:5E][LE]> connectAttempting to connect to 4D:69:98:0E:91:5EConnection successful[4D:69:98:0E:91:5E][LE]> (gatttool:3104): GLib-WARNING **: Invalid file descriptor.

过一回会10S自动断开,网上说这个工具老了,不建议用了(#2):

There are new tools to use with GATT, bluetoothctl/bluetoothd is the preferred since with that you have GAP, etc, but if want to use a stand alone tool then I suggest you use btgatt-client.

3、bluetoothctl——NB的新工具

命令行进入bluetoothctl操作环境(#6)

bluetoothctl

我在手机上用lightblue模拟一个BLE设备ty_prod,之后对其service进行修改,调用scan on进行搜索还是老的,最终发现要先用remove移除之前的设备,之后再scan就会出现[NEW] Device 72:3B:E1:81:4E:4F ty_prod设备注: 用lightblue模拟的设备的MAC不是固定的注: 我发现在lightblue中无论怎么模拟BLE设备,一旦被连上搜索到的service都是IPone的

[bluetooth]# devicesDevice 28:ED:6A:A0:26:B7 ty_prodDevice 58:71:33:00:00:24 Bluetooth KeyboardDevice 00:1A:7D:DA:71:0A SHEN-PCDevice 94:87:E0:B3:AC:6F Mi Phone[bluetooth]# remove 28:ED:6A:A0:26:B7 ...[bluetooth]# scan onDiscovery started[NEW] Device 72:3B:E1:81:4E:4F ty_prod[bluetooth]# scan off...Discovery stopped[bluetooth]# connect 72:3B:E1:81:4E:4FAttempting to connect to 72:3B:E1:81:4E:4F[CHG] Device 72:3B:E1:81:4E:4F Connected: yesConnection successful[ty_prod]

索性就用IPhone自带的服务做测试了~

[ty_prod]# infoDevice 28:ED:6A:A0:26:B7 (public) Name: tuya_mdev_test Alias: tuya_mdev_test Appearance: 0x0040 Icon: phone Paired: yes Trusted: no Blocked: no Connected: yes LegacyPairing: no UUID: Fax (00001111-0000-1000-8000-00805f9b34fb) UUID: Generic Access Profile (00001800-0000-1000-8000-00805f9b34fb) UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb) UUID: Current Time Service (00001805-0000-1000-8000-00805f9b34fb) UUID: Device Information (0000180a-0000-1000-8000-00805f9b34fb) UUID: Battery Service (0000180f-0000-1000-8000-00805f9b34fb) UUID: Vendor specific (7905f431-b5ce-4e99-a40f-4b1e122d00d0) UUID: Vendor specific (89d3502b-0f36-433a-8ef4-c502ad55f8dc) UUID: Vendor specific (9fa480e0-4967-4542-9390-d343dc5d04ae) UUID: Vendor specific (d0611e78-bbb4-4591-a5f8-487910ae4366)[CHG] Device 28:ED:6A:A0:26:B7 ServicesResolved: no[CHG] Device 28:ED:6A:A0:26:B7 Connected: no

我们用Current Time Service,列出所有attributes操作如下:

[tuya_mdev_test]# menu gatt[tuya_mdev_test]# list-attributes 28:ED:6A:A0:26:B7...Primary Service /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041 00001805-0000-1000-8000-00805f9b34fb Current Time ServiceCharacteristic /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0045 00002a0f-0000-1000-8000-00805f9b34fb Local Time InformationCharacteristic /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0042 00002a2b-0000-1000-8000-00805f9b34fb Current TimeDescriptor /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0042/desc0044 00002902-0000-1000-8000-00805f9b34fb Client Characteristic Configuration...

上面Current Time Service对应的服务如下图:

我们选择Current Time进行操作UUID:0x2A2B

[ty_prod]# select-attribute /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0042[tuya_mdev_test:/service0041/char0042]# readAttempting to read /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0042[CHG] Attribute /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041/char0042 Value: e2 07 09 05 01 24 11 03 f1 02 .....$.... e2 07 09 05 01 24 11 03 f1 02 .....$.... [tuya_mdev_test:/service0041/char0042]# attribute-infoCharacteristic - Current Time UUID: 00002a2b-0000-1000-8000-00805f9b34fb Service: /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0041 Value: e2 07 09 05 01 2e 01 03 f5 02 .......... Notifying: yes Flags: read Flags: notify

读出结果大致意思应该是:2018-9/5-1:36:17 周三

读取一下0x180A的Device Information:

[tuya_mdev_test:/service0006/char0007]# select-attribute /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0047/char004a[tuya_mdev_test:/service0047/char004a]# attribute-infoCharacteristic - Model Number String UUID: 00002a24-0000-1000-8000-00805f9b34fb Service: /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0047 Flags: read[tuya_mdev_test:/service0047/char004a]# readAttempting to read /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0047/char004a[CHG] Attribute /org/bluez/hci0/dev_47_B1_26_C1_81_18/service0047/char004a Value: 69 50 68 6f 6e 65 36 2c 32 iPhone6,2 69 50 68 6f 6e 65 36 2c 32 iPhone6,2

当然写、使能notify也很简单,看help即可。最后断开连接、并退出!!!

[tuya_mdev_test:/service0047/char004a]# disconnect 28:ED:6A:A0:26:B7Attempting to disconnect from 28:ED:6A:A0:26:B7[CHG] Device 28:ED:6A:A0:26:B7 ServicesResolved: noSuccessful disconnected[CHG] Device 28:ED:6A:A0:26:B7 Connected: no[bluetooth]# quit

LINKS

[1].Cannot connect to BLE device on Raspberry Pi[2].Invalid file descriptor gatttool of bluez 5.32[3].Get Started with Bluetooth Low Energy on Linux[4].Reverse Engineering a Bluetooth Low Energy Light Bulb[5].Doing Bluetooth Low Energy on Linux[6].Tutorial: BLE Pairing the Raspberry Pi 3 Model B with Hexiwear

@beautifulzzzz智能硬件、物联网,热爱技术,关注产品博客:http://blog.beautifulzzzz.com园友交流群:414948975

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