Cale Collins <ccollins@...>


I have built and installed HCI_UART to nRF52840 Nordic Development kit.  When I connect this device it appears with "lsusb", seemingly I can attach it using "btattach -B /dev/ttyACM0 -S 1000000", revealing hci0.  I have made the recommended adaptation to "/lib/systemd/system/bluetooth.service", appending -E to the "ExecStart=/usr/lib/bluetooth/bluetoothd -E" line.

When issuing commands with "btmgmt", "btmon" reports "Invalid Index (0x11)".  Normal HCI commands fail such as "hciconfig hci0 up".  

Using Bionic-Beaver Ubuntu, 4.15 kernel, Bluez 5.48, also tested with Xenial Ubuntu 4.15 kernel, Bluez 5.50.  Any suggestions would be greatly appreciated. 

Best regards, 

Cale Collins
Field Application Engineer
Gateworks Corporation
3026 S. Higuera, SLO, CA 93401
T: (805)781-2000 x37

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