OSTC Sport bluetooth problem with Linux

Rick Walsh rickmwalsh at gmail.com
Mon Apr 3 18:18:51 PDT 2017

Hi Stephen,

On 4 April 2017 at 11:06, Stephen Hemminger <stephen at networkplumber.org>

> I am running Debian Stretch with current AppImage version of Subsurface.
> Trying to download dives from OSTC Sport.
> The Bluetooth pairing is successful and the rfcomm connection comes up,
> but the serial port won't open.
> # rfcomm -i hci0 connect rfcomm0 00:80:25:4A:10:77 1
> Connected /dev/rfcomm0 to 00:80:25:4A:10:77 on channel 1
> Press CTRL-C for hangup
> [0.003838] ERROR: Input/output error (5) [in ../../src/serial_posix.c:198
> (dc_serial_open)]
> [0.003927] ERROR: Failed to open the serial port. [in
> ../../src/hw_ostc3.c:344 (hw_ostc3_device_open)]
> Possibly related dmesg
> [  482.059744] Bluetooth: TIOCGSERIAL is not supported
> [  482.060272] Bluetooth: TIOCGSERIAL is not supported
> [  488.060994] Bluetooth: TIOCGSERIAL is not supported
> Running stock Debian kernel which is 4.9..

Instead of rfcomm, have you tried using the "native" Bluetooth support in
Subsurface to connect to your dive computer.  It is much easier and
generally more reliable.  See section 5.2.2 of the user manual

If that fails, please run subsurface -vv from the command line, try using
the native Bluetooth support and post the terminal output here.

Do you have onboard Bluetooth device or a dongle?  Just one device
connected?  You may need to activate Bluetooth with whatever desktop
environment tool you have prior to using the Subsurface Bluetooth dialog.

> PS: Is bluetooth always this much of a a pain or is it just Linux?
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> subsurface at subsurface-divelog.org
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