Re: SSM for OBD1 and OBD2 SVXs
 

Is this thread still being watched/updated? I'm picking up a 96 this weekend that I would love to be able to have access to SSM data on in the future.

Re: SSM for OBD1 and OBD2 SVXs
 

The ecutuner software/cable pair can work with the OBD2 SVXes, but mike needs to do a little work on the software before it's user-friendly.

The jecscan software was also used, as previously discussed in this thread, but there were other issues.

So basically all the pieces are there, they just need to be put together. :/

Re: SSM for OBD1 and OBD2 SVXs
 

So what exactly are people looking for? a tool to track and record multiple parameters?

Re: SSM for OBD1 and OBD2 SVXs
 

The reason I ask is that I have been working with Mike to develop a new version of ECUtune that uses strictly Python. My intentions are to develop it for my raspberry pi, but since Python is multi platform it can work on a wide range of machines. If there are features that can be improved upon let me know. I will make a forum later in the ECUtune section.

Re: SSM for OBD1 and OBD2 SVXs
 

I have a lot of the ecu and tcu data/definition files for the OBD2 SVXs. The things I really want to see in a software package is the ability to communicate with both OBD1 and OBD2, SSM1 and SSM2, ECU and TCU and to be able to log the data without dropping any data points. The interface is nice if it is better with gauges but, for me, it is all about the data. What can you get and can you log it.

Re: SSM for OBD1 and OBD2 SVXs
 

What difference are there for SSM 1 vs 2? So basically a way to log data, possible gauge display? I don't have TCU in my car nor do I have access to a SSM 2 car. But I will attempt to see about implementing these with some testing later from other members. As I can't test these functions myself.

Re: SSM for OBD1 and OBD2 SVXs
 

Been trying to reply for some time now but was temporarily locked out of the forum. I'm not sure how, but I would love to be able to help with this project. I'm an electrical engineer with some C programming experience (I've not worked with Python but my understanding is that it is very friendly). I also have a 2006 Legacy that can be used for newer SSM communication as well as an OBD2 SVX (although its not running yet). Let me know if/how I can help!

Re: SSM for OBD1 and OBD2 SVXs
 

No way I would want to attempt to program this in C (I embrace lazy programming, stupid pointers :D). I would need to know more details about how the SSM 2 works vs what the SVX uses. If you have information about how they differ that will help.

I will be posting a forum later in the ECU section to have an official forum for this. I was looking for feedback in what people want/need in it. While my initial intention was to make a version specifically for the Raspberry Pi I wired into my SVX, I am sure a full (more resource consuming) version meant for desktops/laptops wouldn't be out of the question.

Using Python has its perks, but I am no where near a complete version yet but it is in the works. Communication and other functions complete at this point. There is still a lot of work to be done, just don't want anyone expecting a complete project yet.

Re: SSM for OBD1 and OBD2 SVXs
 

Totally agree... pointers are a real pain but embedded system compilers love it. :-(
I've read about the differences of SSM1 and SSM2 (and even SSM3 !) somewhere, let me do some digging and I'll try to get some links together.

Does anyone know if there is a way to tune the OBD2 SVXs, since the ECUTune kit doesn't work with these cars?

Re: SSM for OBD1 and OBD2 SVXs
 

I'm not entirely sure. That would be something that would be very delicate because essentially if it can be done and is not done correctly you will have a faulty tuned ECU. Getting that to work would require a lot if it is even possible. I know Phil (I think it was Phil) has worked with the ECU along with Mike. Maybe they can chime in.

Re: SSM for OBD1 and OBD2 SVXs
 

Okay, got some links for you that may be helpful.

FreeSSM. An open source Select Monitor program. Maybe you can learn something from the source code?

General SSM info. It's on the 2.5RS forums so everything revolves around the Impreza but it's a pretty safe bet that the changes are applicable across the lineup, generally speaking.

More info on SSM1 from a dedicated SVX site. LOADS of information on here for the pre-96 models.

Hope this can help somehow!

Re: SSM for OBD1 and OBD2 SVXs
 

I also have a non-released version of FreeSSM that works with SSM1 in addition to SSM2. I just bought a used, cheap, little laptop I am going to use strictly for working on this stuff. I figure I can load 32bit XP onto it and run all of the old visual C software that is compatible with the source code.

Re: SSM for OBD1 and OBD2 SVXs
 

So basically, yes a program can operate both SSM1 and SSM2 (possibly 3). The issue lies in line voltage and other settings but with proper research and programming can be accomplished. So long as it uses FTDI I don't see a reason why it can't be done.

From what I understand the SSM1 runs on 5V vs the SSM2 running on 12v. While the SSM1 cable can work with SSM2 (theoretically) running a SSM2 cable on a SSM1 will be disastrous as there are no safe guards for increased voltage.

I also remember reading that the SSM1 uses two wires, one for down, one for up where as SSM2 uses only one for bidirectional sending. I will attempt to gather more information and bring it together.

Re: SSM for OBD1 and OBD2 SVXs
 

Reading this jogged my memory. I'm fairly certain SSM3 uses CAN bus protocol but I can't seem to find anything to back that up right now.

Re: SSM for OBD1 and OBD2 SVXs
 

I remember reading that on the impreza site