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USB K+DCAN Baudrates
27-04-2016, 16:04 PM,
Post: #5
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RE: USB K+DCAN Baudrates
(27-04-2016, 15:46 PM)Node Wrote: Do you guys realize that OBD adapter driver (within Ediabas) changes the baudrate automatically according to the protocol used by different units? So baudrate change in windows does not matter at all. What matters are USB-COM converter latency settings which actually mean how long USB driver waits before submitting data to the converter. On normal (hardware) COM ports there are no such settings as each byte is transmitted as soon as possible. USB drivers on the other hand wait for some time to collect more data and send them in bulk hence your connectivity issues. You should invest into normal hardware COM port if you want clean communications. Or alternatively, ICOM. That's sort of what I expected at the start...but I 100% found that on an E46 a baud rate of 115,200 didn't work but 38,400 did. I went back and forwards and didn't change any other parameters. I'm also pretty sure ISTA-D ran a lot faster at 115,200 baud although I'm starting to doubt myself now. A bit of research after Beemerboy's response tells me that underlying on most of the cars before DCAN the OBDII protocol runs at a maximum 10.4k bits/s so matching the baud rate to 9600 would make sense. However if the baud rate does affect the comms then D CAN cars would be better with 115,200 baud. I only do a bit of diagnostics (and potentially programming) for myself, friends and occasionally the local garage so ICOM is a bit of a luxury. |
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Messages In This Thread |
USB K+DCAN Baudrates - by targa9 - 27-04-2016, 12:10 PM
RE: USB K+DCAN Baudrates - by beemerboy88 - 27-04-2016, 15:04 PM
RE: USB K+DCAN Baudrates - by targa9 - 27-04-2016, 15:32 PM
RE: USB K+DCAN Baudrates - by Node - 27-04-2016, 15:46 PM
RE: USB K+DCAN Baudrates - by targa9 - 27-04-2016, 16:04 PM
RE: USB K+DCAN Baudrates - by Node - 27-04-2016, 16:08 PM
RE: USB K+DCAN Baudrates - by stmilosh - 28-04-2016, 17:35 PM
RE: USB K+DCAN Baudrates - by Node - 29-04-2016, 07:39 AM
RE: USB K+DCAN Baudrates - by doktorabg - 28-04-2016, 19:23 PM
RE: USB K+DCAN Baudrates - by stmilosh - 28-04-2016, 21:03 PM
RE: USB K+DCAN Baudrates - by doktorabg - 29-04-2016, 05:08 AM
RE: USB K+DCAN Baudrates - by doktorabg - 29-04-2016, 10:07 AM
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