Convoy S2+: the selected group is reset after battery disconnect

Good day,

I’m a fresh owner of Convoy S2+ - the one that comes with the 12-group firmware.
I’m able to change selected group to #2 (0.1, 1, 35, 100) and switched memory mode off.

It works fine… Until I replace the battery. Then it resets back to the default - group #1, memory on.

Can anyone confirm if this is a bug or by design? I.e. does its driver has a permanent flash memory to store the config? (The manual says leaving the driver in config mode will wear its memory, so I assume there is some kind of persistent memory, but I’d like to be sure).

Thank you.

Bump.
Anyone please?

Someone else reported a similar problem in another thread. Maybe contact Simon?

The switch already disconnects the battery from the driver. Removing the battery should make no difference. Is the light switched off when you change the battery?

Just want to make sure first that I don’t bark the wrong tree.

Good observation, indeed shouldn’t make a difference.

Bingo - I usually unscrew the cap with the light being on. But now I tried several times with the light off, and it does remember settings!

So again - cap off with the light on and the settings are reset. Is that a bug?

No, it’s not a bug. Turning the tailcap or head (depending on the anodization) causes many short interruptions which are interpreted as button presses. Same as when you tap the button all the time.

Righto. All good then! Thanks for elaborating.

I did some testing.

When memory is ON:

- twisting tail switches mode

  • button tap switches mode.

When memory is OFF:

- twisting tail resets flashlight (mode group 1, memory on)

  • button tap switches mode.

Questions:

- how is it possible?

  • can this feature be programmed in different way? E.g button tap switches mode, twisting tail goes to turbo.

Lighted switch?

Nope. Stock S21B with 12 groups 6A driver.

Did the same and mine S21B 6A 12 groups did the reset, but only after I unscrewed the cap fully. Only half turn remembers the settings. Interesting detail - when resetting it also defaults to memory on.

Was the light on or off when you were unscrewing it?

on

Yeap, it’s the same for me - unscrew the cap with the light on and settings are reset. Unscrew with the light OFF - all good.

I have about 6 of these 5A drivers and one 6A driver and they all have this problem. I have talked to Simon about it and if I remember correctly he said he would fix it. I ordered the last 2-3 5A drivers about 3 weeks ago, which was after when I talked to him, and the drivers still have this defect.

I think the drivers are defective and have been discussed on Convoy dedicated thread but AFAIK it hasn’t been fixed. Hadn’t they been cheap and efficient, I wouldn’t have bought them.

Sounds encouraging! Anyhow, the current workaround is robust and not too fiddly. I agree that it’s something I can personally live with. Thanks everyone for their input.

My workaround (if the light resets itself too often, which happens from time to time) is just to stick to the 1st mode group and turn off the memory mode. When I have gone past the mode I wanted, I would just turn off the light, turn on and advance to the mode I wanted.

I’m wondering how it is possible that somehow driver can differentiate between button tap and tail twist. Can it be used for different function like shortcut to turbo on tail twist?

There is just power on and off. It is a mechanical switch, not an e-switch. Turning the tailcap just creates noise that is interpreted as multiple button presses.

I have been waiting for my first S2+ for some time. Last track shows it got to Greenwood IN. But now I learn this model is haunted so close to Halloween, I’m not sure I want it anymore. Imagine trying to escape from a haunt while carrying the thing that is haunted! Can’t be done. Just how is anyone supposed to avoid twisting off the head or tail cap while the light is on?! I don’t know how others use flashlights, but when I carry one, I am constantly and usually unconsciously disassembling all my flashlights while they’re running. How else are they to be used? It is hard to believe such an intolerable defect could have made it to production. This is terrible news.