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Ahh from the thread:
"The criticism was not directed at the code or the concept. It was directed at the "I haven't tested this, but I KNOW it will work" attitude."
As always, third parties have an opinion - I won't add one here.
Or will I. I like the idea, I want to do it.
I'll be giving it a go on my Hyundai Sonata, which has a 12 pin connector.
What I'm lost on and can never seem to find an answer to is the conflicting information out there.
This page mmcdlogger. sourceforge.net suggests the data is request / response. You must ask for data to get it.
But, I recall reading that there is a data stream, i.e. you simply listen and process the data that comes along the pin 1 - but the baud rate - I've seen 160-baud, 8192-baud and 1953-baud all mentioned as being the rate used.
I'm not sure what to expect - and I want to go to arduino.
Perhaps someone knows the answers ?
- What is the baud rate?
- Is there a data stream, or must all data be requested?
- Does pin 10 and 12 get shorted for data ?
I also did some checking yesterday too with my multimeter:
- Pin 1 and 12 - this bounces around between 11-13V and 0V with key and engine on.
- Pin 11 (Speed) and 12 stays at 4.69V with the engine on. I haven't checked for variations here.
This link mmcdlogger. sourceforge.net says the speed can be requested by ECU.
What's the point of the speed sensor PIN in the ALDL circuit? I think it's duplicated if that's the case, the ECU has speed sensor input, as does pin 11.
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