Decode DTCs about python-obd HOT 7 CLOSED

@brendanwhitfield I might be able to help, as I have a car that currently has 4 DTCs. How do I query for the actual DTC codes?

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I've got a branch called dtc going. Either fetch or download it, and install pyserial if you don't have it already. Run this snippet from the repo root to take it for a test drive:

import obd
obd.debug.console = True

o = obd.OBD()
print(o.query_DTC())

Please send me the debug output (the last line should be a list of error codes). There's a lot of development code in here, so if it crashes and burns, the debug should tell me everything I need to know.

Let me know how it goes!

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Darn, I wish I had seen the dtc branch before I spent a few hours getting this to work. I will run it again tomorrow. I see you made a lot of improvements.

This is a great refactor. Thanks for doing it.

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>>> conn.query_DTC()
[obd] Sending command: 0101: Status since DTCs cleared
[obd] write: '0101\r\n'
[obd] read: '48 6B 10 41 01 84 07 6D 00 FD \r\r'
[obd] Sending command: 03: Get DTCs
[obd] write: '03\r\n'
[obd] read: '48 6B 10 43 03 00 03 02 03 03 14 \r48 6B 10 43 03 04 00 00 00 00 0D \r\r'
[obd] Recieved multi-frame response. Can't parse those yet
[obd] Failed to retrieve DTCs

I do have two DTCs that are currently being thrown.

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Yeah, I was afraid of that. Protocol abstraction system isn't 100% yet. Apparently, DTCs overflow into more frames (per query), and you had 1 more than it could handle. Now that I have the raw tx/rx data though, I can do tests over here.

Thank you! This helps a lot

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Alright, master (856b5de) should be good to go. I tried it on your debug output and it parsed just fine.

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This decoder now handles multiple DTC messages from all ECU's. Slated for 0.5.0 release.

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