OBDuino mod - no need of 'uino'
 

Hello,

last week, I found this great "OBDuiono" project on web and I modified the OBDuino32K, because I don't have any arduino hardware.

Now it runs on a Atmega644. I optimized it for (european) C1/Aygo cars (just ISO9141). I had to change some timings and optimized the requests a little: speed/rpm/throttle/intake temperature and map (C1/Aygo don't have a maf) is just requested one time per cycle. But there were many expedient changes in the newest svn-checkout release of obduino32K, so RPM is requested two times again, because ob verifyECUAlive().

I want to use a larger lcd, so I try out a 4x27 Display. Therefore I use 8 corner. But I'll recode the design soon, because it doesn't look good: You can't see the meaning of some values (e.g. "26%").

http://img218.imageshack.us/img218/9545/gaugelcd.th.jpg

BTW: The values are not real (just from a "simulated ECU")


You can get my modification here, if you are interessted. It can be compiled by avr-gcc (std=gnu99). You don't need C++ anymore

Thanks to the developer of OBDuino,
Dominik from germany (pleasy excuse my horrible english)

Looks pretty nice. Have you tried it in the car yet?

To see a display of the names of the PID's (to check what 27% is of what) just press both the left and right buttons at the same time. This will bring up the names for 3/4 of a second.

There are up to 7 PIDs that are used in calculations on every time through the loop. When a user selects them, they are retrieved again just for display. Yes, not optimal at all... but simple.

Interesting! Your bigger display and Atmega644 remind me about these german projects (full documentation and videos inside):

-> S65-Shield for Arduino (display is taken from S65 - popular GSM phone by Siemens)
S65-Shield - watterott.net

-> ATM based web radio with "big" display
AVR WebRadio - watterott.net


PS if possible pls. share more details about your board

This week I got some MC33290. I was scared to try it with a simple transistor level converter in car, because I don't want to damage my ECU.
Today I tried it in my car with MC33290 and it works fine!

@Mesuge: Thanks for that hint! Now I ordered such a display (a Sharp LS020..). I found this information/libs to drive it (without arduino):
Display Programming . Maybe I will experiment with that in future. But for a car gauge it's to small.