[obdgpslogger] ELM327 interface "hanging" with NO DATA condition after a random amount of time (Toyota Corolla)

[Gary Briggs]

On Mon, Sep 19, 2011 at 12:37:31AM +0200, Maciej Grela wrote:
> I will disassemble the cable tomorrow but it's from dealextreme so I
> think it's some kind of clone.

Very likely then, yes.

> Yes, I've seen it happen at least 4 times today. There is no pause,
> the error messages start immidiately after valid data. Here is an
> example from one strace'd run:
> 
> 18:34:54.083039 read(3, "\r>", 4086)    = 2 <0.000039>
> 18:34:54.083768 write(3, "0111\r", 5)   = 5 <0.000045>
> 18:34:54.382062 read(3, "NO D", 4095)   = 4 <0.000038>
> 18:34:54.383060 read(3, "ATA\r", 4091)  = 4 <0.000036>
> 18:34:54.384060 read(3, "\r>", 4087)    = 2 <0.000037>
> 
> As you can see there is no pause in data exchange between the PC and ELM.

Looks pretty dodgy to me. That shouldn't really happen in normal usage,
especially if it's been working up to that point

Could it be as simple as a bad solder joint, or a cable briefly jogging
loose, something like that?

Gary