Raspberry PiにBluetooth機器をCLIで接続する

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Raspberry Pi LiteなどGUIが存在しない場合にBluetooth機器をCLIで接続する方法を記載します。

こちらのページを参考

https://pimylifeup.com/raspberry-pi-bluetooth/

1. To load the Bluetooth command-line tool, you need to enter the following command on your Raspberry Pi.

bluetoothctl

2. Now that we are in the Bluetooth command-line tool, we need to go ahead and turn the agent on.

Switching the agent on will allow us to search for and pair with other Bluetooth devices.

You can do this by using the command below.

agent on

3. The next step is to tell the Bluetooth device on our Raspberry Pi to scan for other devices.

By scanning for devices, we can retrieve their MAC address and begin the process of pairing that device with the Raspberry Pi.

To start the scan process, all you need to do is enter the following command.

scan on

From this command, you should start seeing a result like what we have below.

[bluetooth]# scan on
Discovery started
[CHG] Controller DC:A6:32:05:7F:06 Discovering: yes
[NEW] Device 51:B8:16:6A:6F:C6 51-B8-16-6A-6F-C6
[NEW] Device 40:23:43:3F:4E:58 BRAVIA 4K UR2

The two columns you will probably want to pay attention to the most are the third and fourth columns.

The third column specifies the MAC address of the device that triggered the event. This address is what you will use if you want to pair the device.

The fourth column is the descriptor. For a newly found device, this is typically the device name.

4. Once you have found the MAC address of the device you want to connect to, you can now proceed to pair your Raspberry Pi with it.

To get Bluetooth to pair the device to your Raspberry Pi, you need to make use of the following command.

pair [XX:XX:XX:XX:XX:XX]

5. When you first pair a device, you will be immediately connected to it.

However, once you have gone out of range of the Raspberry Pi’s Bluetooth, you will need to re-connect the device by using the following command.

connect [XX:XX:XX:XX:XX:XX]

6. If you don’t want to have to re-pair your device, then you can make use of the trust command.

This command works just like the other two commands and requires the MAC address of the Bluetooth device that you want to trust.

trust [XX:XX:XX:XX:XX:XX]

You can only trust a Bluetooth device on your Raspberry Pi after you have completed the initial pairing.

Hopefully, at this point, you will now have Bluetooth up and running without any issue.

If you have any feedback on this Raspberry Pi Bluetooth tutorial or have run into any issues, then feel free to drop a comment below.