Hi Peter,
> > Can you attach the output of
> >
> > diff -u working.py broken.py
> >
> > where you've done some simple change which breaks it, e.g...
>
> I can't do that because every time it fails I back it out to the
> working code.
I don't see why that means you can't have two files, one of which is a
copy of the faulty code before you back up to the working code.
> Attached is the Python with the Logger code inserted. It also
> contains the Ultrasonic detection and action [Distance() and
> us_act()].
So I'm assuming this is the faulty code.
> Perhaps I don't know where to find the debug_log.txt.
It will be in the current directory when you run your program.
If you want it somewhere specific, make it '/tmp/debug_log.txt' in the
code.
You should find that file given your first debug() call as those lines
work for me here.
$ cat >peter.py
import logging
logging.basicConfig(filename='debug_log.txt', level=logging.DEBUG,
format='%(asctime)s - %(levelname)s - %(message)s')
logging.debug('This is a log message.')
$
$ python peter.py
$ cat debug_log.txt
2021-01-29 09:42:35,195 - DEBUG - This is a log message.
$
> def distance():
> logger.debug('Start distance sampling')
>
> # set Trigger to HIGH
> GPIO.output(GPIO_TRIGGER, True)
>
> # set Trigger after 0.01ms to LOW
> time.sleep(0.00001)
> GPIO.output(GPIO_TRIGGER, False)
>
> StartTime = time.time()
> StopTime = time.time()
>
> # save StartTime
> while GPIO.input(GPIO_ECHO) == 0:
> StartTime = time.time()
What if that loop takes a very long time to exit?
> # save time of arrival
> while GPIO.input(GPIO_ECHO) == 1:
> StopTime = time.time()
Or that one.
I'd add extra logic to limit both to either a number of iterations or an
amount of time. If the limit is reached then that's a fault to log as
you don't expect it.
--
Cheers, Ralph.
--
Next meeting: Online, Jitsi, Tuesday, 2021-02-02 20:00
Check to whom you are replying
Meetings, mailing list, IRC, ... http://dorset.lug.org.uk
New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
