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MissingTeeth Users With Comms Issues 
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Joined: Tue Jan 15, 2008 2:31 pm
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If you're suffering from lots of overruns you will see that MTX has trouble sending packets. Recorded bin logs will still be perfectly good to use, however tuning may be awkward and interrogation will be very difficult. Drop to idle to interrogate or interrogate before hitting the key. Interrogation happens when you launch MTX.

There are a few possible "solutions" for this.

Ideally MTX would monitor RPM and increase inter character send delay with RPM and associated need of pauses.

Secondly, MTX could have a fixed inter char delay all the time which wouldnt affect things much because most packets sent to the ECU are small.

Either of those will keep the streaming speed high and maximally useful.

Lastly, and something you can definitely do yourself is to reduce the speed of comms from 115200 to half or a quarter or even less. This WILL affect quality of your logs (by reducing sampling rate), so is not ideal.

The procedure for trimming the serial speed is similar to this: viewtopic.php?f=54&t=1466

I'll talk to Dave about an inter-char delay setting for FreeEMS. There may already be an option somewhere.

Fred.

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Wed Jan 11, 2012 2:24 pm
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