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--- bluetooth [2016/10/21 12:44]
leonanavi
+++ bluetooth [2019/10/01 08:28] (current)
leonanavi
@@ Line 1: / Line 1: @@
 ====== Bluetooth ======
-Step by step tutorial how to pair and connect with Bluetooth a device with AGL to a smartphone. This tutorial has been tested with the built-in Bluetooth in Raspberry Pi 3.
+Step by step tutorial how to pair and connect with Bluetooth a device with AGL to a smartphone. This tutorial has been tested with the built-in Bluetooth in Raspberry Pi 3 B/B+ and Raspberry Pi 4.
+Images for Raspberry Pi 4 include [[https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/22508|recipe pi-bluetooth. It provides a script that starts automatically and properly configures BT-HCI.]] The same script is used in Raspbian.
 * Verify that the Bluetooth module is detected:
   hciconfig -a
-* Start Bluetooth systemd service:
+**Note:** Check the troubleshooting if the Bluetooth module is NOT detected
-  systemctl start bluetooth
 * Launch bluetoothctl:
@@ Line 64: / Line 64: @@
   [bluetooth]# quit
+==Troubleshooting==
+* Start Bluetooth systemd service:
+  rfkill unblock bluetooth
+  hciconfig hci0 up
+  systemctl start bluetooth

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