OBD MPGuino gauge

[eimix]

All you wrote is already done in Obduino32K
comunication is same.

What version do u use?
try uncoment
#define DEBUGOutput
it will show on what step iso initialization is failing. please try all 3 modes and remember what it displays.

[priit271]

I use obduino32k v179. If I uncomment DEBUGOutput and try to upload, i get error line 3641 "lcd_gotoXY" not defined .. and i change it to "lcd.setCursor" I dont know its this right or not, however now I can upload and if I try in car with ISO9141 protocol and I get "Failed! 8". ISO_14230_fast I get Failed 4 and ISO_14230_slow Failed 8.

[eimix]

Originally Posted by priit271

ISO9141 protocol and I get "Failed! 8". ISO_14230_fast I get Failed 4 and ISO_14230_slow Failed 8.

It looks like your car is not responding

I do not have any passat 1997 to check if my system works with it. I look around at work.

May be you can test with other car to check if it works and you build everything fine?

[priit271]

I tested in mazda mx5 and it works fine.

[eimix]

So we need exact protocol instructions your car is using to try adapt obduino to your car.

Also it would be great to check if your car is responding anything.

Or may be do you have VAG-COM 401 cable or similar? VAG-COM software has function to detect wich OBD2 is supported.

[electromike]

Thanks for adding the Big Font Code. It is quite a fun addition.

I checked in a slight change to the google code to make it more for my liking, and maybe someone elses. It is controlled with the define #BIG_font_hybrid.

It will make the display on the Average fuel consumption page look like

## ## ## 6.32
## ## ## AVG L/K

so you can see both your average in a Big Num format and still see your instant as well in the top right corner.

[eimix]

there is error in Short/Long time fuel trim PIDs calculating:

  case STFT_BANK1:
  case LTFT_BANK1:
  case STFT_BANK2:
  case LTFT_BANK2:
    *ret=(buf[0]-128)*7812;  // not divided by 10000 for return value
    long_to_dec_str(*ret/100, decs, 2);
    sprintf_P(retbuf, PSTR("%s %%"), decs);
    break;

all results are shown in between +-3

    *ret=(buf[0]-128)*7812;  // not divided by 10000 for return value

has to be replaced with (tested)

    *ret=buf[0]; // Added to avoid 65536 limitation in next operation
    *ret=(*ret-128)*7812;  // not divided by 10000 for return value

or to leave only *ret=(*ret-128)*7812;
becouse *ret is already assigned *ret=buf[0]*256U+buf[1];
or any other solution that do not increases memory consumption

[crysty7]

For "eimix":

For internal/external temperature where is placed the KTY sensor ?

[eimix]

?
It is not in car.

You can get it in any nearest electronic/radio parts shop.
googled for Romania
Search results - SOS electronic
or
Senzor de temperatur

Or did i missunderstand your question?

[crysty7]

Sorry for confussion .

In OBDUINO schematic where is conected KTY ?