OBD2 spec?

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Re: OBD2 spec?

Postby bigBADbenny » Thu Nov 19, 2020 7:33 pm

I mainly use an old school content rss aggregation app and otherwise rely on yt subscriptions.

You confirmed the “old” phone supports otg?
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Re: OBD2 spec?

Postby bigBADbenny » Thu Nov 19, 2020 7:34 pm

I mainly use an old school content rss aggregation app and otherwise rely on yt subscriptions.

You confirmed the “old” phone supports otg?
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Re: OBD2 spec?

Postby Kimmo » Fri Nov 20, 2020 9:28 am

Oh yeah, pretty sure... IIRC it works as a power bank, which ain't happening without the 5v you get from OTG. I'll look it up, though
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Re: OBD2 spec?

Postby bigBADbenny » Sat Nov 21, 2020 8:52 am

If you’re using an android phone, get the “otg?” app from playstore to confirm otg is native.
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Re: OBD2 spec?

Postby Kimmo » Sat Nov 21, 2020 5:52 pm

Phone has OTG.

Removed the cubby
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CAD model
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Bit of ally with curved ends, a bit of a notch and a couple of bends, plus coathanger bracket mounted in place of cubby unit
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CBFed painting it, covered in dark tint film
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Phone fits pretty good
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Looks alright
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Maybe I should get some of that Sugru stuff and mold little rubber bits to fill in the sides and maybe cover the speaker grilles.
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Re: OBD2 spec?

Postby bigBADbenny » Sat Nov 21, 2020 7:16 pm

Does it have an interchangeable battery?

Can try the no-battery mod.
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Re: OBD2 spec?

Postby Kimmo » Sun Nov 22, 2020 7:11 am

bigBADbenny wrote:Does it have an interchangeable battery?

Can try the no-battery mod.

Every phone has an interchangeable battery ;)

But nah, batteries you can just pop out of phones haven't really been a thing for a while... the phone can't be as compact (or pack as many Ah in the same size), and is more fragile when it isn't a solid unit with the battery stuck in, that's why; it isn't just a cynical anti-feature. It was a very good feature though; I'm sure it persists in some of those expensive ruggedised phones.

Last phone I had with a removable battery, I actually dropped in the dunny! Barely hesitated to pull it out (there was piss in there), popped off the back and heard sizzling, yeesh. Got that battery out a moment later to stop the damage happening, and stripped the phone down (there was no way rice or whatever would have cut it), dried it out and found some bits of green shmootz on the mobo here and there (dilute piss would've fucked it up nicely pretty quick smart). Cleaned off the shmootz with some CRC, slapped it back together, crossed my fingers and powered it on. Fuck yeah, removable battery - I'd cut the juice in time.

What's the point of the no-battery mod? Stops the battery from getting hammered? (They prefer to have half a charge, and don't like being constantly topped up.)
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Re: OBD2 spec?

Postby bigBADbenny » Sun Nov 22, 2020 2:42 pm

Yep especially stopping the battery from overheating and exploding.

Usually involves removing a battery, using a resistor circuit on the charge controller and fine tuning volts to the power supply in place of the battery.
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Re: OBD2 spec?

Postby Kimmo » Sun Nov 22, 2020 5:46 pm

bigBADbenny wrote:Yep especially stopping the battery from overheating and exploding.

Hm, that would be bad...

Simplest thing would be to chuck a switch on the +5v line, I guess... bit of a hack, but at least the phone could remain unmodified and continue its role as a spare.

It wouldn't charge through the VAG COM too, I'm guessing; hence the Y cable. Yeah, cause the phone is a host to it.
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Re: OBD2 spec?

Postby Kimmo » Thu Nov 26, 2020 5:49 pm

Trimmed the right angle plug as much as I dared
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Bit cramped in there, making what room I can. Round hole is because the camera lens sits a bit proud
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Four layers of double-sided tape (not the foamy stuff, obvs)
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Meh, that's close enough to centered
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Re: OBD2 spec?

Postby bigBADbenny » Sat Nov 28, 2020 11:02 am

Progress!
You can still access the power button?
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Re: OBD2 spec?

Postby Tonic » Sat Nov 28, 2020 9:26 pm

I like it.... but can you get the back camera out and move it to the back of the car for reversing?
:D :shock:
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Re: OBD2 spec?

Postby Kimmo » Sun Nov 29, 2020 3:08 pm

bigBADbenny wrote:Progress!
You can still access the power button?

Yeah, I can poke a credit card in the small gap above the phone.
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Re: OBD2 spec?

Postby Kimmo » Sun Nov 29, 2020 3:10 pm

Tonic wrote:I like it.... but can you get the back camera out and move it to the back of the car for reversing?
:D :shock:

IKR? Just had a thought - I could get the existing reversing camera screen off the top of the dash, and poke it in behind this setup so the phone's camera can show it, lol...

Crazy like a fox!
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Re: OBD2 spec?

Postby Kimmo » Sun Nov 29, 2020 5:15 pm

Hmm, problem is, I'm not sure this 90° USB C to Micro USB adapter cable has enough conductors for OTG... bought a Micro USB OTG adapter to use in the meantime while I wait for that Micro USB OTG Y cable to turn up, and no dice.

It works with a USB C OTG adapter going straight onto the Vagcom, but not via this damn 90° cable. Had a look at the OTG spec on Wiki, and before my eyes glazed over, I realised I might be facing a hassle... dammit. It's not like I can search with "OTG compliant" for an adapter like this; it's a bloody crapshoot. I gather it's kinda baked in to USB C, but you've gotta be lucky Micro USB. :?
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