OBD MPGuino gauge

[njakts]

  // ask protocol
  //elm_command(str, PSTR("ATDPN\r"));
  // str[0] should be 'A' for automatic
  // set header to talk directly to ECU#1
//  if(str[1]=='1')  // PWM
 //   elm_command(str, PSTR("ATSHE410F1\r"));
  //else if(str[1]=='2')  // VPW
  //  elm_command(str, PSTR("ATSHA810F1\r"));
 // else if(str[1]=='3')  // ISO 9141
  //  elm_command(str, PSTR("ATSH6810F1\r"));
 // else if(str[1]=='6')  // CAN 11 bits
 //   elm_command(str, PSTR("ATSH7E0\r"));
 // else if(str[1]=='7')  // CAN 29 bits
  //  elm_command(str, PSTR("ATSHDA10F1\r"));
#endif

after this my obduino started to work.
I had trouble with re-init after engine restart, so after each engine start I had to restart obduino to initialize again.

[marcelroeder]

I forgot to tell, that i am using the ISO 9141 with the MC33660 chip. Are the changes in the last post (above) just for the elm chip or in general ?

[dar]

Rokrokrok,
I use:
#define ISO_9141
#define useECUState
//#define DisconnectECUIfRPMIsZero
#define do_ISO_Reinit
#define skip_ISO_Init
#define carAlarmScreen

I use chip Si9243AEY
P.S. My car WW Passat 1999, gassoline, the same WW OBD protocol.

[lgedmitri]

Originally Posted by marcelroeder

Hi,
i am trying to use Obduino32k (ISO 9141) in my Mazda Demio, but the init process fails every time. In debug output the lcd prints F!81 81 F7 80. What do i make wrong???

Hi guis,
Similar situation - Mazda Familia (JDM version of Mazda Protege) with ISO 9141 protocol. My debug output shows F!941 941 6B 940
One more thing is I'm using L9637D instead of MC33290 - it's substitute but with different pin assignment. Maybe that's the reason?
Looks like some troubles in init routine.
Any suggestions?

[Majl-ta]

Hi all, please advice. Connection is not working ISO 9141-2 Peugeot 107 I'm not a good programmer can not seem to find the cause. On disply shows only ISO 9141 init - failed. Thank you for your help everyone.

[yensen]

I've been absorbing a lot of information from this thread so I thought I'd share something that might help others with their 'init failed' problems. Within void iso_write_byte(byte b) change line "Serial.print(b);" to "Serial.write(b);".

Using the logic analyzer I could see with "print" it was sending 0x32 0x34 0x37 instead of the intended 0xF7 (as part of the init sequence). Changing to "write" fixed this and it was able to complete init. I suspect the newest Arduino IDE versions have a Serial function that performs differently than what was implemented back when this code was getting more focus. In other words "print" probably worked with older Arduino versions.

I'm working with Arduino 1.0.5, MC33290, 2002 VW TDI. Still not fully functional yet...

[Majl-ta]

Originally Posted by yensen

I've been absorbing a lot of information from this thread so I thought I'd share something that might help others with their 'init failed' problems. Within void iso_write_byte(byte b) change line "Serial.print(b);" to "Serial.write(b);".

Using the logic analyzer I could see with "print" it was sending 0x32 0x34 0x37 instead of the intended 0xF7 (as part of the init sequence). Changing to "write" fixed this and it was able to complete init. I suspect the newest Arduino IDE versions have a Serial function that performs differently than what was implemented back when this code was getting more focus. In other words "print" probably worked with older Arduino versions.

I'm working with Arduino 1.0.5, MC33290, 2002 VW TDI. Still not fully functional yet...

With the modifications that you specify the init sequence succeeds and Arduino connects to the car?

[yensen]

Originally Posted by Majl-ta

With the modifications that you specify the init sequence succeeds and Arduino connects to the car?

Yes. This allowed mine to complete the init sequence using obduino code versions r198 or r203 with Arduino v1.0.5.

I never got much further than this. The screen would go to sleep seemingly randomly. I need to play with the config settings, but started to lose interest.

[Majl-ta]

Originally Posted by yensen

Yes. This allowed mine to complete the init sequence using obduino code versions r198 or r203 with Arduino v1.0.5.

I never got much further than this. The screen would go to sleep seemingly randomly. I need to play with the config settings, but started to lose interest.

Ok, I'll try your editing in my car. It is a pity that this project contains many errors.

[Majl-ta]

Originally Posted by yensen

Yes. This allowed mine to complete the init sequence using obduino code versions r198 or r203 with Arduino v1.0.5.

I never got much further than this. The screen would go to sleep seemingly randomly. I need to play with the config settings, but started to lose interest.

So even with the adjustment it still does not work. Still only shows ISO9141 INIT FAILED. Is there anyone whom the forum it work?