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brendan-w / python-OBD

OBD-II serial module for reading engine data
GNU General Public License v2.0
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Can't connect to serial port #196

Closed ksrm0024 closed 4 years ago

ksrm0024 commented 4 years ago

Hi there,

I have effectively the same issue as the person in this thread: https://github.com/brendan-w/python-OBD/issues/166

My code is as follows:

import obd connection = obd.OBD("/dev/rfcomm99")' 'response = connection.query(obd.commands.RPM)' 'print(response.value) connection.close()

Which returns the error:

'[obd.elm327] [Errno 16} could not open port /dev/rfcomm99: [Errno 16] device or resource busy: '/dev/rfcomm99'' '[obd.obd] Cannot load commands: No connection to car' '[obd.obd] Query failed, no connection available'
'None'

The person who posted that thread said that automatically connecting with rfcomm bind rfcomm99 as opposed to sudo rfcomm bind rfcomm99 solved the issue, but that doesn't work in my case. Any ideas would be greatly appreciated - thanks in advance

alistair23 commented 4 years ago

It looks like some other process is accessing /dev/rfcomm99

ksrm0024 commented 4 years ago

I figured out the issue. I was using the screen application to test my bluetooth connection upon startup each time and I guess the application would hang and prevent the port from being accessed even after I closed the application. I tried it without testing beforehand and it worked fine.