Hello all,

I have recently started working on software to display the data from my innovate motorsports LC-1 wideband Oxygen sensor. The software is to the point where it displays the Lambda and AFR values and will draw a moving graph of the data. It also displays the error codes and status messages from the wideband. The code isn't quite to the point where I would want to post it anywhere but if anyone is interested feel free to contact me.
It currently only supports the LC-1 but it wouldn't take me long to add support for other innovate widebands. I might also add support for the diywb though that will take a little longer.

-Jeremy

You mean it displays the data on the Empeg screen? Very cool. Did you have to do any custom hardware work to get the two devices talking, or did it just plug straight into the serial port with no modification?

It plugs straight into the serial port. The innovate products have two mini phono jacks for serial ports. They are meant to be able to be chained so that you can have a whole string of them communicating to a display (or computer). So, it comes with mini phono to db9 cable that I just plugged into the back of the empeg.
I'm having a small problem where it seems that some garbage is getting sent out over the serial port when it gets set up, causing to wideband to do a free air calibration which, if it happened in the tailpipe wouldn't be a good thing (especially if the engine was running).
I'm not super experience with serial port programming so I might be doing something wrong....



I've attached some screenshots (the sensor isn't in a car at the moment so the data isn't interesting)
-Jeremy

Awesome.

It seems like there was some solution somewhere to the data being spewed out on the serial port. But I forget if the in-car serial port is the same as the back-of-the-empeg serial port, and, if it is, there's no way to prevent it from doing so. But you could put in a timed circuit so that the serial port isn't connected for, say, 15 seconds after the empeg powers on.

Someone else who's more familiar with the serial port hardware chime in.

I haven't even gotten to bootup garbage on the serial port.
My problem is that the serial port is spewing something when I open it in my program.
I think I might just make a special cable that only has the transmit wire from the wideband to the empeg...

-Jeremy

That's weird. You don't have the non-data lines hooked up to data lines somehow, do you? No data should be sent out on program start, but the states of some of the ... metadata ... lines will change.

There aren't any control lines, since it's only connected through a mini phono connector, there are only 3 lines, Ground, transmit and receive.
I'll have to do some more debugging later...

Yeah, but there are on the empeg, and if one of them got crossed with the transmit line....

Well,
I did the intelligent thing and plugged the empeg into the serial port of my laptop and watched while starting the program. I got this:

hijack: removed menu entry: "Wideband O2"

So, now I just have to figure out how to stop the kernel from outputting on the serial port...

-Jeremy

Probably use the suppress_notify parameter for Hijack. I'm not sure if that'll suppress that sort of stuff or not. Also check out the "app uses serial port" setting. I don't think that has anything to do with kernel messages now that I think about it, though.

suppress_notify=1 is in there. It doesn't seem to do it.
I guess I'll have to resort to breaking the transmit line from the empeg. That will solve the problem with boot messages too.

-Jeremy

Since that message is generated by Hijack, an open-source kernel, you could edit the source code yourself. And perhaps make it an optional hijack feature to suppress those messages, and give the resulting code back to Mark for rolling back into the main Hijack code base.

Here's a fixed version of Hijack for you to try it with:

http://rtr.ca/zImage.v463+

Cheers

Thanks!

That fixed it wonderfully. The problem that still remains is I assume boot loader messages. But, since they are at a different baud rate than the wideband, I don't think there is much chance of it understanding it. It only has a few commands and they are all plain letters like 'c'.
So, I'll see how it goes when I get the sensor installed in the car.
Thanks for the fixed kernel!

-Jeremy

I'm actually making a custom cable for it that only has the grounds and tx wires from the wideband. That way I can make it with a DB-9 male and wire it so I don't need the mess of adapters (two male-male adapters and a null modem adapter) that I have on there now.
So, it won't matter if the empeg is outputting anything since the line won't be connected.

-Jeremy

Cool. Your project looks interesting! Keep us informed of how it goes

Ignore this post, just trying to clear the not-read tag on this thread.

That's a bug in the BBS software, we think. Hopefully it'll go away when we upgrade to the next version.

In the meantime, to clear the stuck-on unread-mark, do this:
1. Make sure you're done reading all the messages on the BBS you wanna read.
2. Select "MY HOME" from the bar up top.
3. Select "MARK ALL READ" from the bar at the bottom near your user icon.
4. Select "MARK ALL POSTS AS READ" from the confirmation screen.

Or you can just create a bookmark to: http://empegbbs.com/ubbthreads/domarkallread.php?Cat=0

You don't say?
:P

I chose to not do that this time as I wasn't finished reading and it had been a bit since I'd made a frivolous post.

Sorry, didn't realize you were the one who taught it to me in the first place.

Knowing this, how come you made the post you made in this thread?

Does anyone know if Jag ever released this software to anyone?
This would be an absolute god send to me right about now!!

I, to, am interested in this.

I guess no one knows ??

Shame. Annoying how much "stuff" on the internet just gets lost over time. <sigh>

Now that my car is supercharged, I, too, think it would be interesting to watch the O2 sensor at work.
Piping it through the empeg would delete a gauge install from the process... even at an extra cheap gauge price.

That is only a narrowband gauge, designed to connect to the factory-fitted o2 narrowband sensor. That's why it's cheap ('cos it's not much use other than to see if the sensor's working).

The sensor mentioned by the OP is a wideband sensor which has a much more useful output range. I had a wideband sensor and VEMS gauge fitted to my GTR Skyline and it was a very handy tuning aid.

Having the wideband output displayed on the 'peg would be cool indeed.

Narrow band is still certainly useful, better than nothing at all thats for sure!

WB is often a telltale sign that something isn't working correctly.
Logging the Innovate one with the empeg, one could also use it for actually tuning the car with new modifications! Certainly logging a bunch of other stuff is possible with the innovate projects so why not the emepg too since it's via serial.

I suppose it's a no go, asking the mods/admins for the email address he registered with for a shot in the dark email, or even some conserted googling for futher info ??

Yes, but the factory O2 sensor would still be fun to monitor. If I can free up some funds (and the empeg could display the output) I'd certainly go for a wide-band sensor.

Steve, have you got a LM-1 or LC-1 Innovate unit?

The format for the LM-1 is readily available on Innovates website and to be honest doesn't look that complicated to read. If one could program that is.
I guess a simple start would be to init the display and forward the values read from the serial port to the display before getting clever and drawing graphics as Jag did previously.

How's your C ?