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Bluetooth in the Default Linux Configuration

Your i.MX 8M NAVQ Plus kit arrives with the Linux image ready for Bluetooth operation.

Configuring Bluetooth

Linux images starting from release 1.1.5-359 automatically configure Bluetooth at boot time, and no additional actions are needed for using Bluetooth in Linux after boot. Older releases require manual Bluetooth configuration steps described below:

  1. On the i.MX 8M Plus, issue the following command from the Linux shell:

    user@imx8mpnavq:/home/user# sudo hciattach ttymxc0 any 115200 flow
Device setup complete

  2. Initialize the BT module, validate that the initialization has completed successfully:

    imx8mpnavq:/home/user# sudo hciconfig hci0 up
user@imx8mpnavq:/home/user# hciconfig
hci0:   Type: Primary  Bus: UART
        BD Address: D4:53:83:C4:E5:5B  ACL MTU: 1016:5  SCO MTU: 60:12
        UP RUNNING 
        RX bytes:833 acl:0 sco:0 events:58 errors:0
        TX bytes:3232 acl:0 sco:0 commands:58 errors:0

Verifying Bluetooth in Linux

When Linux boots, the BT interface is enabled and configured in the default image installed to the kit. Step through the following procedure to configure BT in your local environment and then validate it:

  1. Power on a Bluetooth device in the vicinity, validate that the target detects it:

    user@imx8mpnavq:/home/user# sudo hcitool scan
Scanning ...
        50:1A:A5:E5:34:8A       JABRA BT2045
        F0:F6:1C:67:F5:D4       iPhone yur

  2. Power on a BLE device in the vicinity, validate that the target detects it:

    user@imx8mpnavq:/home/user# sudo hcitool lescan
LE Scan ...
14:BB:6E:2F:9B:07 (unknown)
^C
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