Halcyon Symbios Download

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Pat S

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Feb 23, 2026, 9:35:48 AMFeb 23
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Hi, I'm a new subsurface user. Running 6.0.5504-CICD-release on macOS Tahoe 26.3 and mobile with version 6.0.5504 on IOS 26.2.1

In both cases when I try to download logs from the Symbios, it's not working. 

On the Mac I get a popup of  "Error Unable to open LE:{8d7dccd1-8ca2-cf3a-1122-07c70097a05b} Halcyon (Symbios Handset)" with a red banner at the bottom saying "Failed to find a suitable service..."

And on the IOS version it just shows Info: Import:Input/output error.

Unlike the Shearwaters, there isn't a Start Bluetooth option in the Symbios and the computer connects find to the Halcyon app, so I know the device is working. But I can't seem to figure out how to get it to connect to Subsurface.

Probably user error, but anything I should be trying differently?

Thanks,
Pat

Pat S

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Mar 4, 2026, 5:40:21 PMMar 4
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I figured out the error when using my iPhone with the help of a user on scubaboard.  I needed to go in to the settings and advanced in subsurface, then I can turn on the bluetooth option to temporarily show all bluetooth devices.  When I do that I can finally see the Symbios Handset in the dropdown list starting with the serial number and I can choose it from there.  But I have to turn that setting on each time before I sync.
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