*** I am reposting this here given that this plugin is installed in LibreELEC by default ***
I have a number of scripts that utilize the GPIO and worked perfectly on the Pi 3B. I have encountered some problems after migrating to the Pi 4B. It appears that input pins are stuck as either up or down regardless of the direction they are pulled during pin setup. Here is a linux script to test:
#!/usr/bin/python
import sys
sys.path.append("/storage/.kodi/addons/virtual.rpi-tools/lib")
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
pins = (3,5,7,8,10,11,12,13,15,16,18,19,21,22,23,24,26,29,31,32,33,35,36,37,38,40)
print('UP TEST')
for pin in range (0,26):
try:
GPIO.setup(pins[pin], GPIO.IN, pull_up_down=GPIO.PUD_UP)
print('pin ' + str(pins[pin]) + ' = ' + str(GPIO.input(pins[pin])))
except ValueError:
print ('pin '+ str(pins[pin]) + ' = ' "ValueError")
print('\nDOWN TEST')
for pin in range (0,26):
try:
GPIO.setup(pins[pin], GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
print('pin ' + str(pins[pin]) + ' = ' + str(GPIO.input(pins[pin])))
except ValueError:
print ('pin '+ str(pins[pin]) + ' = ' "ValueError")
Which produces the following output on my Pi 4B running the latest official LibreELEC (v9.1.501) with 'Raspberry Pi Tools' plugin v9.1.901.106:
UP TEST
pin 3 = 1
pin 5 = 1
pin 7 = 0
pin 8 = 1
pin 10 = 1
pin 11 = 1
pin 12 = 0
pin 13 = 1
pin 15 = 1
pin 16 = 0
pin 18 = 0
pin 19 = 0
pin 21 = 0
pin 22 = 0
pin 23 = 0
pin 24 = 1
pin 26 = 0
pin 29 = ValueError
pin 31 = ValueError
pin 32 = ValueError
pin 33 = ValueError
pin 35 = ValueError
pin 36 = ValueError
pin 37 = ValueError
pin 38 = ValueError
pin 40 = ValueError
DOWN TEST
pin 3 = 1
pin 5 = 1
pin 7 = 0
pin 8 = 1
pin 10 = 1
pin 11 = 1
pin 12 = 0
pin 13 = 1
pin 15 = 1
pin 16 = 0
pin 18 = 0
pin 19 = 0
pin 21 = 0
pin 22 = 0
pin 23 = 0
pin 24 = 1
pin 26 = 0
pin 29 = ValueError
pin 31 = ValueError
pin 32 = ValueError
pin 33 = ValueError
pin 35 = ValueError
pin 36 = ValueError
pin 37 = ValueError
pin 38 = ValueError
pin 40 = ValueError
Notice that the input pins are not influenced by the pull up/down setup. Also pins above 26 throw an error during setup. This issue has been discussed elsewhere (I adapted the script from here) and the v0.7 update for the RPi.GPIO library fixed this issue on July 21, 2019 (see here and here). I see that the Raspberry Pi Tools plugin has not been updated for 6 months and it currently uses RPi.GPIO v0.6.3. Can someone please bump the RPi.GPIO dependency to v0.7?
Sorry for the bad code formatting. The code blocks ignored line returns which looked even worse.
