Ubuntu21 bluetooth connects to freebuds pro freebuds耳机Ubuntu21连接失败

Problem

the bluetooth cannot connect to the freebuds in the setting.

Solving Method

use terminal to control the bluetooth.
follow the steps in the first reference. you must get the pair success and connect sucess at first. or you should remove the device before the trust. when it show the pair code, input yes.

if the freebuds pro switch between connected state and disconnected state, please put your headphone in the headphone case again and try again. This problem is caused by freebuds pro design. If you take out the headphone, the setting of freebuds will think you stop music player. You know, the headphone will stop when you take the headphone away from your ear. So theis cause the bug.

Luckly, if you connect to Ubuntu and your phone together, the freebuds can switch between Ubuntu and your phone well.

Reference

https://gist.github.com/Aritzherrero4/a0a422612af8de4de868181c4cd05030
https://askubuntu.com/questions/1085960/use-bluetooth-headset-with-microphone-hfp-in-ubuntu-18-04
https://askubuntu.com/questions/1225896/huawei-freebuds-3-pairing-with-ubuntu-18-04