ELM327 Software Development

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Re: ELM327 Software Development

Postby Tazzi » Sun Oct 13, 2013 12:14 am

Wow.. theres alot of information set over the comms!
The above Headers are 11bit headers for 500Kbaud

Theres a different set used for 11bit 250kbaud. I can also see that the buffer didnt fill up as quick when using CAN Low compared to when CAN High was used.

Theres a whole heap of other info being shot over CAN Low, Some of the messages look quite similar to CAN High, so maybe they broadcast same info over both networks?
Only modules I can think of in a VZ on OBD2 would be PCM,ABS,TC,PIM(Maybe Both ALDL and OBD2) annnnd.. I think thats about it?

Might also be a "generic" broadcast from the pcm to let the car know "Im here!", almost like a heartbeat.

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Re: ELM327 Software Development

Postby VX L67 Getrag » Mon Oct 14, 2013 8:30 am

Seeing there's been a few downloads of program ver 17 but no one else testing thought I'd better again.

Here's logs of both programs funny though when I copied all info from logger program it warned me of a net framework error & wouldn't allow me to save as text after that but did allow me to save as rtf & then copied from that to text!

But yeah all these log's are just PCM on bench & nothing else connected, I do have a BCM, PIM & Key that are for this PCM too but not sure how to wire it all up!
Attachments
Ver 0.17 Logs.rar
(29.39 KiB) Downloaded 12 times

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Re: ELM327 Software Development

Postby VX L67 Getrag » Mon Oct 14, 2013 9:57 am

Also interesting to note it doesn't detect any chatter on 29 Hi but it does on 29 Lo, but both these crash program when disable monitor all button!

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Re: ELM327 Software Development

Postby Tazzi » Mon Oct 14, 2013 10:45 am

[09:08:14:745] Setting CAN Error Format...
[09:08:14:761] ELM Device Sent back '?'

Sent: ATPP2A00.
Received: ?>

Sooo, going throught the "setup" part of the log, the ELM didnt like me sending the above for some reason, gives me a questing mark! I think Theres meant to be a SV somewhere there (Set Value).

Man, going through the logs, it gets about 11frames before a buffer full occurs. But its reset procedure is pretty pick.. takes about 200ms. So some info is missed but it works!

Also VX, I have no clue why its crashing on 29bit! lol, I saw that it popped up a "Unknown error has occured".. So not sure what that is. The application must be getting something set to it on the CAN protocol that it doesnt like.. and freaks it out.

Other then that, Still havent removed the "can error" or "<error" messages. Fairly certain thats because the error format isnt set to off and also the "Auto format" needs to be turned off.

Will update later today.!

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Re: ELM327 Software Development

Postby Jayme » Mon Oct 14, 2013 1:22 pm

I gave it a go on my real VZ alloytec and got the same connect error as VX did.

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Re: ELM327 Software Development

Postby VX L67 Getrag » Mon Oct 14, 2013 1:25 pm

I logged some data going on with HPT unlocking & reading alloytec, looks like it missed some of what may be stop chatter command 38 36 41 41 then it had a lot of 7E0 & 7E8 messages!

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Re: ELM327 Software Development

Postby Jayme » Mon Oct 14, 2013 1:30 pm

7e0 and 7e8 are the ID's of the PCM... I would be interested if you could get a serial port monitor log of hpt reading DTC's and maybe rpms and things, and ill start implementing an AVT CAN adx....

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Re: ELM327 Software Development

Postby VX L67 Getrag » Mon Oct 14, 2013 2:52 pm

Here's a log of me pressing clear fault codes a few time in HPT while scanning, but with all the rest of the chatter it's going to be hard to decipher whats what!

Also not sure how to send a command to ask for specific items in HPT as it should just show up in the log, but as it's a PCM on a bench it doesn't show much!
Attachments
Clear Faults.txt
(120.23 KiB) Downloaded 16 times

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Re: ELM327 Software Development

Postby Holden202T » Mon Oct 14, 2013 3:04 pm

what program are you using for logging HPT info ?

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Re: ELM327 Software Development

Postby VX L67 Getrag » Mon Oct 14, 2013 4:10 pm

Free serial port monitor

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