godiag nano with pcmhammer

[99zguy]

On Godiag website it is listed as a being called J2534 Nano. I do have a question out to them directly as they supposedly have RandD dept and all. Hopeing to get some more specs and build information directly from them so that hopefully find a way to get this to work.

[Cincinnatus]

This is the vcx nano that I use that works.
https://www.vxdiagshop.com/wholesale/vx ... UQQAvD_BwE

I went to godiag website and all I see is it's a model gd101 j2534 pass thru.

[antus]

Yeah the vcx nano has been using the name for years and years. The godiag nano is fairly recent and not at all the same product in any way.

[Cincinnatus]

So would pcmhammer just need to find the right j2534 driver file path in order for the godiag to work? The device is seen by hammer, and will connect to it and query a pcm, but is it using the correct drivers?

[antus]

No, its talking to the interface OK, but at this stage the interface looks buggy and not functionally complete. Maybe it will be updated. At this stage with its current driver and firmware its not going to work as intended unless someone can figure out some kind of workaround that gets it across the line. I would say they have only developed the firmware enough to get it working with normal small scan tool requests at 1x speed in vpw - enough to sell it - and do not have it working reliably with large packets or at 4x speed for this kind of purpose. Best bet is to contact them and see if they can test it with pcmhammer and improve the drivers/firmware. If their goal is to make it 100% working and feature complete and they are prepared to put the time in, it might eventually work.

[Cincinnatus]

I know it supports multiple protocols, but it is also supposedly j2534 compliant, which I expect is as capable as a vcx nano for communication. It's my understanding tazzi got the nano to work through the j2534 driver.

[antus]

Its not a vcx nano though and it doesnt say its 100% compliant. Its in the same ball park as the other cheap ebay devices, where they only claim that it supports a certain subset then do only that subset. I happen to know this common 'toyota' one only does enough J2534 for the Toyota tool to work and it does it very very slowly compared to the higher tier interfaces. Like 30 second delay every time you click a button in the Toyota software while the interface communicates.

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We know pcmhammer works fine with the J2534 support of the mdi, the vcx nano, and a range of other J2534 tools (but not all), so it definitely is the interface, not the app.

Another example see http://blog.obdii365.com/2023/01/03/vxd ... iag-j2534/

Interesting they say the VX DIAG VCX SE supports pcmhumer (I think they mean pcmhammer lol), but the godiag only lists GM GDS 2 (which is the GM scanner, and settings) and they don't say it supports GM SPS which is the factory reflash tool. They also dont say it supports pcm hammer/humer. On their official page
here https://www.godiag.com/wholesale/godiag ... canner.htm they say "Support most all of J2534 compatible software". The 'most' is a key word - it means they know it's not 100% compliant and we know reflash is the outlier in vpw functionality due to the large packet format that is only used and allowed when reflashing when silencing the bus and passing safety and security checks.

I think vxdiag products that support VPW are probably the leading/best/low cost/high performance J2534 interface.

[Cincinnatus]

Thanks for the explanation. I wasn't confident enough in it to try any flashing yet. I just wanted to test it as a multi protocol diagnostic tool.

[99zguy]

That explains alot for sure. I did recieve a reply from them at godiag. The seem to want to help work out the issue and are asking for more information such as the software using and screenshots etc of any errors. I'm trying to determine what best to send then to get them in right direction on this since the do seem to want to dig into it and see if they are able to update and or correct any problems with drivers firmware etc. Any suggestions as to what would be best to get to them to help us with this would help. Will keep posted. They responded fairly quickly I thought.

[Tazzi]

That explains alot for sure. I did recieve a reply from them at godiag. The seem to want to help work out the issue and are asking for more information such as the software using and screenshots etc of any errors. I'm trying to determine what best to send then to get them in right direction on this since the do seem to want to dig into it and see if they are able to update and or correct any problems with drivers firmware etc. Any suggestions as to what would be best to get to them to help us with this would help. Will keep posted. They responded fairly quickly I thought.

At least they sound proactive. I would be asking what their J2534 buffer size is.