Thank you, that got rid of that error. Still no joy with the PIR sensor though unfortunately.
The strange thing is if i change my monitor_on and monitor_off sh files to
vcgencmd display_power 0
vcgencmd display_power 1
the pir works fine and shuts off / turns on my monitor.
these are my scrips
#!/usr/bin/env python
import sys
import time
import RPi.GPIO as io
import subprocess
io.setmode(io.BCM)
SHUTOFF_DELAY = 30 # in seconds, how long the monitor will be on until next button press or PIR detection
PIR_PIN = 22 # 15 on the board (this needn’t to be a PIR. Can be a button also)
LED_PIN = 16 # optional, don’t use as Relay-PIN. It just shows detection time of the PIR without delay time
def main():
io.setup(PIR_PIN, io.IN)
io.setup(LED_PIN, io.OUT)
turned_off = False
last_motion_time = time.time()
while True:
if io.input(PIR_PIN):
last_motion_time = time.time()
io.output(LED_PIN, io.LOW)
print ".",
sys.stdout.flush()
if turned_off:
turned_off = False
turn_on()
else:
if not turned_off and time.time() > (last_motion_time +
SHUTOFF_DELAY):
turned_off = True
turn_off()
if not turned_off and time.time() > (last_motion_time + 1):
io.output(LED_PIN, io.HIGH)
time.sleep(.1)
def turn_on():
subprocess.call(“sh /home/pi/monitor_on.sh”, shell=True)
def turn_off():
subprocess.call(“sh /home/pi/monitor_off.sh”, shell=True)
if name == ‘main’:
try:
main()
except KeyboardInterrupt:
io.cleanup()
monitor on script
DISPLAY=:0 xscreensaver-command -deactivate
monitor off script
DISPLAY=:0 xscreensaver-command -activate
