Reboot during dive

OSTC's running hwOS sport or tech
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Hens
Posts: 8
Joined: Saturday 16. May 2020, 22:29

Reboot during dive

Post by Hens » Tuesday 25. August 2020, 10:24

Hello

This weekend during a dive with the sport with tech sw during the dive the screen went black
When pushing a button 2 icon appears (HW logo and I think Bluetooth logo ? ) pushing some more buttons and suddenly I saw "reboot" on the screen which after this a new was started
Battery is on 67%
Any idea what caused this and how to prevent this ?

best regards
Hens

Ralph
Posts: 623
Joined: Saturday 24. June 2017, 11:31

Re: Reboot during dive

Post by Ralph » Tuesday 25. August 2020, 10:41

Hello Hens,

are you having a TR-model OSTC and/or did you had the compass view active when the reboot happend?
May you also provide the OSTC hardware version: Settings -> Information -> more : the string in the line
titled "Hardware" will help us to identify you exact model and production version.

This shall definitely not happen!!

thanks,
Ralph

heinrichsweikamp
Posts: 4062
Joined: Sunday 13. May 2007, 18:07

Re: Reboot during dive

Post by heinrichsweikamp » Tuesday 25. August 2020, 11:11

Hi Hens,

What battery was in use? A reboot during use is for sure not a software issue and most likely a power loss from the battery and/or contact issue.

regards,
Matthias

Hens
Posts: 8
Joined: Saturday 16. May 2020, 22:29

Re: Reboot during dive

Post by Hens » Tuesday 25. August 2020, 14:23

It is the sport hardware with tech software

The original battery is still it with 67 % of power (battery problem came to my mind)

I will check if I can find the data Ralph asked for when I am at home

I never use the compass, it is sometimes visible when switching to different screens

best regards
Hens

Hens
Posts: 8
Joined: Saturday 16. May 2020, 22:29

Re: Reboot during dive

Post by Hens » Tuesday 25. August 2020, 19:03

Here is the data I could find

The strange thing is that the dive and the one after the restart is not in the logbook
Attachments
8377D157-2E2F-460F-98C9-A219D70D36D0.jpeg
3061C4C0-22CD-4212-AD4A-B62162DEEC92.jpeg
D4C17AEF-FD38-4588-B7DB-8552BE51FBEF.jpeg

Hens
Posts: 8
Joined: Saturday 16. May 2020, 22:29

Re: Reboot during dive

Post by Hens » Saturday 29. August 2020, 21:41

Any idea what to do ?
What are the chances this happens again?

Using the dive soft as backup now just in case

Ralph
Posts: 623
Joined: Saturday 24. June 2017, 11:31

Re: Reboot during dive

Post by Ralph » Sunday 30. August 2020, 09:27

There's one kown bug around reboot during a dive posted here on the forum, but it involves a specific combination of TR model and compass operation. But that's both not the case with your incident, so it is most likely what Matthias already suggested: contact problem with the battery. The software version you are running has no record of instantanious reboots.

Hens
Posts: 8
Joined: Saturday 16. May 2020, 22:29

Re: Reboot during dive

Post by Hens » Sunday 30. August 2020, 17:18

oke tnx Ralph

My guess is the quality of the battery that came with it
I am testing it now on 0,2 A and it drops to 1,3V right away maybe with some low temperature this caused the reboot with even a bit bigger drop ?

Is the remaining time capacity calculated with time or voltage ?

Any advise on which battery is the best ?

thanks
Hens

Kehrmaschine
Posts: 50
Joined: Sunday 30. July 2017, 12:34

Re: Reboot during dive

Post by Kehrmaschine » Tuesday 8. September 2020, 18:13

I have to confirm that since last update my OSTC+ is also rebooting during the dive. Had it on two TX dives.

heinrichsweikamp
Posts: 4062
Joined: Sunday 13. May 2007, 18:07

Re: Reboot during dive

Post by heinrichsweikamp » Wednesday 9. September 2020, 12:09

Hi,

This is, for sure, not a software issue. Check battery compartment for moisture or anything unusual. The battery cap in the OSTC sport and plus should be closed good so the contact from the battery is properly conducted to the housing.

regards,
Matthias

Kehrmaschine
Posts: 50
Joined: Sunday 30. July 2017, 12:34

Re: Reboot during dive

Post by Kehrmaschine » Thursday 10. September 2020, 17:11

Hallo Matthias

Keine Spur von Feuchtigkeit oder ähnlichem, alles trocken. Akku ist auch ok und hält die Ladung. Habe den OSTC zur Zeit zum Backup Rechner degradiert, habe leider kein Vertrauen mehr dass er mich sicher nach oben bringt. Sollten sich die Ausfälle häufen schicke ich ihn wieder zu euch, dann dürft ihr wieder zaubern.

LG
Mario

abcdef
Posts: 15
Joined: Saturday 2. February 2019, 20:57

Re: Reboot during dive

Post by abcdef » Monday 14. September 2020, 14:50

[quote=Hens post_id=22818 time=1598800734 user_id=2717]
oke tnx Ralph

My guess is the quality of the battery that came with it
I am testing it now on 0,2 A and it drops to 1,3V right away maybe with some low temperature this caused the reboot with even a bit bigger drop ?

Is the remaining time capacity calculated with time or voltage ?

Any advise on which battery is the best ?

thanks
Hens
[/quote]

As far as I understood it (please correct if wrong): this device calculates the % display from the voltage. Some other OSTCs have a charge counter built-in (OSTC plus, 4) and show the % as a remaining charge. So the % display looks the same in OSTC plus and OSTC sport, but the meaning of the % number is different (sport: voltage, plus: remaining charge), and it's not mentioned in the documentation.

The pictures above show 1.61V and 67%. This doesn't fit together, 1.61V should be 100%, and 1.37V should be 67%. But it could happen if the voltage temporarily dropped because of a bad contact; for a split second it dropped to 1.37V, the % dropped to 67% and stayed there. The % display doesn't go up again when the voltage goes back up to 1.61V.

I think Energizer Lithium are a good choice especially in cold water. But you have to be careful that their voltage drops fast when they go empty. So it takes many dives to go from 100% to 75% (1.4V), and then it goes much faster from 75% to 0% in maybe 5 dives.

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