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--- en:bpi-r64:bluetooth [2020/01/15 17:55] – [issues] frank
+++ en:bpi-r64:bluetooth [2023/06/08 17:06] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Bluetooth ======
+need patch from https://patchwork.kernel.org/patch/10728073/ (v5 does not work!) and increased sleep in https://elixir.bootlin.com/linux/v5.0-rc5/source/drivers/soc/mediatek/mtk-scpsys.c#L248
+change
+  usleep_range(12000, 12100);
+to
+  msleep(50);
+this is already done in my repo (5.4)
+:!: CONFIG_BT_MTKUART needs to be module to load firmware (has to be done after rootfs is mounted)
+<code>
+root@bpi-r64:~# mkdir -p /lib/firmware/mediatek
+root@bpi-r64:~# wget https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/mediatek/mt7622pr2h.bin
+root@bpi-r64:~# cp mt7622pr2h.bin /lib/firmware/mediatek/
+root@bpi-r64:~# apt-get update
+root@bpi-r64:~# apt-get install bluez
+root@bpi-r64:~# reboot
+#boot kernel with applied tty-patch and increased scpsys-sleep
+</code>
+===== bluetoothctl =====
+  # bluetoothctl
+<code>
+[bluetooth]# help
+Menu main:
+Available commands:
+-------------------
+advertise                                         Advertise Options Submenu
+scan                                              Scan Options Submenu
+gatt                                              Generic Attribute Submenu
+list                                              List available controllers
+show [ctrl]                                       Controller information
+select <ctrl>                                     Select default controller
+devices                                           List available devices
+paired-devices                                    List paired devices
+system-alias <name>                               Set controller alias
+reset-alias                                       Reset controller alias
+power <on/off>                                    Set controller power
+pairable <on/off>                                 Set controller pairable mode
+discoverable <on/off>                             Set controller discoverable mode
+agent <on/off/capability>                         Enable/disable agent with given capability
+default-agent                                     Set agent as the default one
+advertise <on/off/type>                           Enable/disable advertising with given type
+set-alias <alias>                                 Set device alias
+scan <on/off>                                     Scan for devices
+info [dev]                                        Device information
+pair [dev]                                        Pair with device
+trust [dev]                                       Trust device
+untrust [dev]                                     Untrust device
+block [dev]                                       Block device
+unblock [dev]                                     Unblock device
+remove <dev>                                      Remove device
+connect <dev>                                     Connect device
+disconnect [dev]                                  Disconnect device
+menu <name>                                       Select submenu
+version                                           Display version
+quit                                              Quit program
+exit                                              Quit program
+help                                              Display help about this program
+export                                            Print evironment variables
+</code>
+<code>
+[bluetooth]# power on
+Changing power on succeeded
+[bluetooth]# agent on
+Agent is already registered
+[bluetooth]# default-agent
+Default agent request successful
+[bluetooth]# scan on
+Discovery started
+[CHG] Controller 00:00:46:76:22:01 Discovering: yes
+[bluetooth]# devices  #already paired, so remove first
+Device B4:9D:0B:5F:2A:B9 Aquaris X5 Plus
+[bluetooth]# remove B4:9D:0B:5F:2A:B9
+[DEL] Device B4:9D:0B:5F:2A:B9 Aquaris X5 Plus
+Device has been removed
+[NEW] Device B4:9D:0B:5F:2A:B9 Aquaris X5 Plus
+[bluetooth]# pair B4:9D:0B:5F:2A:B9
+Attempting to pair with B4:9D:0B:5F:2A:B9
+[CHG] Device B4:9D:0B:5F:2A:B9 Connected: yes
+Request confirmation
+[agent] Confirm passkey 953871 (yes/no): yes
+[CHG] Device B4:9D:0B:5F:2A:B9 Paired: yes
+Connection successful
+[CHG] Device B4:9D:0B:5F:2A:B9 UUIDs: 00001103-0000-1000-8000-00805f9b34fb
+...
+[CHG] Device B4:9D:0B:5F:2A:B9 UUIDs: 936da01f-9abd-4d9d-80c7-02af85c822a8
+Authorize service
+[agent] Authorize service 00001108-0000-1000-8000-00805f9b34fb (yes/no): Request canceled
+[CHG] Device B4:9D:0B:5F:2A:B9 ServicesResolved: no
+[CHG] Device B4:9D:0B:5F:2A:B9 Connected: no
+</code>
+===== issues =====
+  grep bluetooth /var/log/syslog
+if it shows something like this on connect:
+  bluetoothd[197]: a2dp-source profile connect failed for MAC:OF:BT:DEVICE: Protocol not available
+you need to install pulseaudio-module-bluetooth and restart bluetoothd
+  apt install --no-install-recommends pulseaudio-module-bluetooth
+  systemctl restart bluetooth