Has anyone ever managed to control an output pin on a raspberry pi 3 B+?
Don't laugh!
Using python gpiozero [2] a few days ago produced crash output
indicating 4 different ways of accessing IO pins were tried and all
failed. [1] (Running as root worked no better.)
Now the same thing dies with
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/gpiozero/pins/pi.py", line 71, in pin
pin = self.pins[n]
KeyError: 4
During handling of the above exception, another exception occurred:
...
File "/usr/lib/python3.6/site-packages/gpiozero/pins/local.py", line 67, in
_get_revision
raise PinUnknownPi('unable to locate Pi revision in /proc/cpuinfo')
gpiozero.exc.PinUnknownPi: unable to locate Pi revision in /proc/cpuinfo
indicating someone's relying on what looks like proprietory kernel
extensions.
Trying wiringpi means installing the whole gcc lafaffel, on a minimal
system.
Is there a something like a 3-liner cli program that can flick an output
pin on request and JUST WORKS(TM) on openSUSE? (leap 15)
Thanks,
Volker
[1]
/usr/lib/python3.6/site-packages/gpiozero/devices.py:452: PinFactoryFallback:
Falling back from rpigpio: module 'RPi.GPIO' has no attribute 'IN'
'Falling back from %s: %s' % (name, str(e))))
/usr/lib/python3.6/site-packages/gpiozero/devices.py:452: PinFactoryFallback:
Falling back from rpio: No module named 'RPIO'
'Falling back from %s: %s' % (name, str(e))))
/usr/lib/python3.6/site-packages/gpiozero/devices.py:452: PinFactoryFallback:
Falling back from pigpio: failed to connect to localhost:8888
'Falling back from %s: %s' % (name, str(e))))
/usr/lib/python3.6/site-packages/gpiozero/devices.py:452: PinFactoryFallback:
Falling back from native: unable to open /dev/gpiomem or /dev/mem; upgrade your
kernel or run as root
'Falling back from %s: %s' % (name, str(e))))
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Can't connect to pigpio at localhost(8888)
Did you start the pigpio daemon? E.g. sudo pigpiod
Did you specify the correct Pi host/port in the environment
variables PIGPIO_ADDR/PIGPIO_PORT?
E.g. export PIGPIO_ADDR=soft, export PIGPIO_PORT=8888
Did you specify the correct Pi host/port in the
pigpio.pi() function? E.g. pigpio.pi('soft', 8888)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Traceback (most recent call last):
File "./pi-out-set", line 7, in <module>
from gpiozero import LED
File "/usr/lib/python3.6/site-packages/gpiozero/__init__.py", line 22, in
<module>
from .devices import (
File "/usr/lib/python3.6/site-packages/gpiozero/devices.py", line 486, in
<module>
Device.pin_factory = _default_pin_factory()
File "/usr/lib/python3.6/site-packages/gpiozero/devices.py", line 453, in
_default_pin_factory
raise BadPinFactory('Unable to load any default pin factory!')
gpiozero.exc.BadPinFactory: Unable to load any default pin factory!
[2]
from gpiozero import LED
import sys
out = LED(4)
state = sys.argv[1]
if state == "on" or state == "1":
out.on()
else:
out.off()
--
Volker Kuhlmann
http://volker.top.geek.nz/ Please do not CC list postings to me.
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