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1.7.5 Beta with Surface GF

Posted: 15 Dec 2025, 11:41
by heinrichsweikamp
Attached to this post is the 1.7.5 Beta with the following changes:

[1.7.5] with RTE 3.70
NEW: Surface GF. Shows Surface GF for instantaneous ascend to the surface. Selectable in the left corner
or in the custom view "Overview")
Fix: The scrubbertime in the CCR summary view was not right aligned. This has been changed => the
line matches the layout of the other lines. In addition the scrubber display mode was not visible
after opening the scrubber menu because its drawing was depending on a function
parameter which was not set by the open function.
Fix: Bugfix missing SYS header in dive menu: The SYS header in the diving menu was missing.
Rootcause was a missing array entry which was not created while adding the new SYS tab
for custom options.
Fix: Bugfix AM/PM time: in the previous version the AM/PM time format was not shown in the
system menu and the customer Info view. To solve this problem a helper function was added
which now returns a string which considers the time format setting.
Fix: Sleep mode current was too high for old (~10 year) OSTC 4 models
NEW: Internal logfile mode (in case it is enabled via compile switch). For development use only.
Fix: Hide slow exit graph if close to surface: In the previous version the slow exit graph was
drawn even if the diver is at the surface. To avoid this the drawing is now stopped below a
depth of 30cm.
Fix: Reset timeout after Bluetooth disconnect: The counter triggering the shutdown for the
OSTC BLE Chipset was not reset after closing the Bluetooth connection. As result an
unintendet shutdown of the BLE could happen in next use. To avoid this the counter is now
reset during disconnection.
NEW: Support for 460kBaud Bluetooth in the OSTC 5 hardware


Beta Versions require manual installation via the OSTC Companion or Subsurface as described here: viewtopic.php?t=19186

Happy testing,
Matthias

Re: 1.7.5 Beta with Surface GF

Posted: 18 Dec 2025, 16:36
by swissdiving
Beta installed. Ready for the testing, next dive...

Re: 1.7.5 Beta with Surface GF

Posted: 24 Dec 2025, 15:45
by swissdiving
What seems to be missing is Surface GF in the Log entry. Would be great to have it.

Re: 1.7.5 Beta with Surface GF

Posted: 05 Jan 2026, 16:31
by algo
Hi,

i can upload the Firmware with the OSTC companion to my OSTC4 (#385). But after Update 1 the OSTC quits the process with a checksum error. I tried to download and unzip the file multiple times, but no progress....

Br, Alex

Re: 1.7.5 Beta with Surface GF

Posted: 08 Jan 2026, 21:00
by Thorsten
Hi Alex,

what tool did you use for the update? Was the fast mode activated? I assume you tried to update from the last offical release?
I just did the update using an old OSTC4 HW and the OSTC companion SW. Worked without problems.

KR,
Thorsten