OSTC 4 and OSTC 5

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hwOS4: New Firmware 1.7.5 with RTE 3.70

Last post by mikeller « 22 Feb 2026, 17:20
Replies: 7
by heinrichsweikamp » 12 Jan 2026, 18:31

7 Replies

2526 Views

Last post by mikeller
22 Feb 2026, 17:20
New registered user? Please read.

Last post by heinrichsweikamp « 14 Feb 2024, 10:30
Posted in OSTC+, OSTC3, cR, sport and OSTC 2 (Mod. 2015 and later)

by heinrichsweikamp » 14 Feb 2024, 10:30 » in OSTC+, OSTC3, cR, sport and OSTC 2 (Mod. 2015 and later)

0 Replies

46305 Views

Last post by heinrichsweikamp
14 Feb 2024, 10:30
FAQ: Charging the OSTC 4

Last post by heinrichsweikamp « 16 Mar 2021, 12:04

by heinrichsweikamp » 16 Mar 2021, 12:04

0 Replies

32112 Views

Last post by heinrichsweikamp
16 Mar 2021, 12:04
New OSTC Companion 3.2.1

Last post by kuehnero « 23 Mar 2020, 12:49
Replies: 1
by heinrichsweikamp » 08 Jan 2020, 14:49

1 Replies

30401 Views

Last post by kuehnero
23 Mar 2020, 12:49
Updating OSTC 4 and OSTC 5 - HowTo

Last post by heinrichsweikamp3 « 18 Apr 2023, 11:58
Replies: 2
by heinrichsweikamp » 23 Jul 2018, 10:06

2 Replies

33825 Views

Last post by heinrichsweikamp3
18 Apr 2023, 11:58
OSTC Tools for Windows - HWOS Config for Android

Last post by Rob « 15 Oct 2023, 16:34
Replies: 48
by Rob » 03 Aug 2016, 18:36
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2
48 Replies

1238024 Views

Last post by Rob
15 Oct 2023, 16:34

Topics

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OSTC4 Batterie leert sich (zu?) schnell

Last post by Walde « 18 Mar 2026, 20:18
Replies: 6
by TomtheRom » 12 Sep 2025, 08:33

6 Replies

3273 Views

Last post by Walde
18 Mar 2026, 20:18
solid state 02 sensor

Last post by Peter51 « 02 Feb 2026, 15:38
Replies: 5
by TecDivingBremen » 11 Jun 2025, 17:32

5 Replies

6036 Views

Last post by Peter51
02 Feb 2026, 15:38
CCR cave bailout function request

Last post by sailor « 30 Jan 2026, 21:59

by sailor » 30 Jan 2026, 21:59

0 Replies

575 Views

Last post by sailor
30 Jan 2026, 21:59
OSTC4 - wacht nicht mehr auf

Last post by Thorsten « 09 Jan 2026, 16:13
Replies: 1
by TomtheRom » 07 Jan 2026, 12:22

1 Replies

831 Views

Last post by Thorsten
09 Jan 2026, 16:13
1.7.5 Beta with Surface GF

Last post by Thorsten « 08 Jan 2026, 21:00
Replies: 4
by heinrichsweikamp » 15 Dec 2025, 11:41

4 Replies

1509 Views

Last post by Thorsten
08 Jan 2026, 21:00
OSTC 4 freezing and Bluetooth issues

Last post by heinrichsweikamp « 03 Jan 2026, 15:53
Replies: 6
by Riku » 20 Dec 2025, 15:48

6 Replies

3761 Views

Last post by heinrichsweikamp
03 Jan 2026, 15:53
Gas Management [Feature Request / Suggestion]

Last post by swissdiving « 06 Dec 2025, 19:02
Replies: 2
by Divert » 04 Dec 2025, 21:46

2 Replies

1109 Views

Last post by swissdiving
06 Dec 2025, 19:02
OSTC 5 Compass not working and has never worked

Last post by Divert « 05 Dec 2025, 20:40
Replies: 13
by Divert » 09 Sep 2025, 04:54

13 Replies

6215 Views

Last post by Divert
05 Dec 2025, 20:40
Corrosion Housing OSTC 4

Last post by geba « 17 Nov 2025, 21:48
Replies: 1
by Paddelputzer » 24 Oct 2025, 12:06

1 Replies

1556 Views

Last post by geba
17 Nov 2025, 21:48
OSTC 5 dimentions

Last post by Thorsten « 07 Nov 2025, 07:57
Replies: 6
by bluebanana » 03 Aug 2025, 23:25

6 Replies

248013 Views

Last post by Thorsten
07 Nov 2025, 07:57
OSTC4 battery volt instead %

Last post by Caper « 19 Oct 2025, 18:29
Replies: 1
by Caper » 18 Oct 2025, 18:28

1 Replies

1198 Views

Last post by Caper
19 Oct 2025, 18:29
Battery capacity

Last post by heinrichsweikamp « 24 Sep 2025, 11:04
Replies: 2
by Claude » 22 Sep 2025, 13:20

2 Replies

2265 Views

Last post by heinrichsweikamp
24 Sep 2025, 11:04
Release 1.7.2

Last post by chrisrms « 26 Jul 2025, 05:54
Replies: 4
by Pierrot48 » 24 Jul 2025, 15:17

4 Replies

139443 Views

Last post by chrisrms
26 Jul 2025, 05:54
Please Explain Future TTS Reading

Last post by geba « 04 Jul 2025, 13:41
Replies: 9
by Divert » 10 Jul 2024, 21:37

9 Replies

161204 Views

Last post by geba
04 Jul 2025, 13:41
Purchasing Strategy for dive computer(s)

Last post by heinrichsweikamp « 03 Jul 2025, 16:50
Replies: 11
by DiveLux » 29 Jun 2025, 08:21

11 Replies

8321 Views

Last post by heinrichsweikamp
03 Jul 2025, 16:50
log corrput, no data

Last post by swissdiving « 20 Jun 2025, 19:52
Replies: 12
by tdewilt2 » 11 May 2024, 21:59

12 Replies

49709 Views

Last post by swissdiving
20 Jun 2025, 19:52
OSTC Slow Ascent

Last post by Fabio89 « 02 Jun 2025, 21:27
Replies: 5
by Fabio89 » 01 Jun 2025, 20:27

5 Replies

15085 Views

Last post by Fabio89
02 Jun 2025, 21:27
OSTC5 - HWOS 1.6.9 /1.7.0 requests

Last post by Fabio89 « 30 May 2025, 07:30
Replies: 1
by swissdiving » 28 Mar 2025, 18:42

1 Replies

126894 Views

Last post by Fabio89
30 May 2025, 07:30
Air Integration

Last post by swissdiving « 20 May 2025, 20:21
Replies: 25
by deepadrenalin » 07 Apr 2016, 10:58
1

2
25 Replies

314956 Views

Last post by swissdiving
20 May 2025, 20:21
hwOS4: New Firmware 1.6.9 with RTE 3.40

Last post by heinrichsweikamp « 06 May 2025, 14:44
Replies: 1
by heinrichsweikamp » 31 Jan 2025, 10:58

1 Replies

53975 Views

Last post by heinrichsweikamp
06 May 2025, 14:44
hwOS4: New Firmware 1.7.1 with RTE 3.50

Last post by heinrichsweikamp « 06 May 2025, 14:44

by heinrichsweikamp » 06 May 2025, 14:44

0 Replies

5084 Views

Last post by heinrichsweikamp
06 May 2025, 14:44
OSTC 5 connecting to Subsurface Divelog

Last post by DiveLux « 05 May 2025, 12:28
Replies: 2
by DiveLux » 05 May 2025, 07:55

2 Replies

27303 Views

Last post by DiveLux
05 May 2025, 12:28
OSTC 4 with 3x Solid-State Sensor

Last post by heinrichsweikamp « 05 May 2025, 10:25
Replies: 8
by petkozaric » 13 Apr 2023, 11:28

8 Replies

66431 Views

Last post by heinrichsweikamp
05 May 2025, 10:25
Firmware-Update bricht ab

Last post by swissdiving « 22 Mar 2025, 06:32
Replies: 3
by ple » 15 Mar 2025, 20:17

3 Replies

28746 Views

Last post by swissdiving
22 Mar 2025, 06:32
Glitch on OSTC4 with latest firmware.

Last post by Divert « 13 Mar 2025, 17:27

by Divert » 13 Mar 2025, 17:27

0 Replies

6983 Views

Last post by Divert
13 Mar 2025, 17:27

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