Notes/print-service.py

!#/usr/bin/python
import RPi.GPIO as GPIO           # import RPi.GPIO module
import time
import os

GPIO.setmode(GPIO.BCM)            # choose BCM or BOARD
GPIO.setup(23, GPIO.OUT)  # set a port/pin as an output
GPIO.setup(24, GPIO.IN) # set a port/pin as an input

printer_state = GPIO.input(24)

if printer_state = 0:  #printer on
  print "Printer state is on, state =", printer_state
  
  else:
    while printer_state != 0:  #while printer is off

      printer_state = GPIO.input(24)
      GPIO.output(23, 1)  #Turn on printer
      time.sleep(30)
      print "Done resting"

qstate = 0  ##initialize queue as empty
mystring = "none"  ##initialize mystring

while qstate != 0:

  if mystring.find("no entries"): ## Check for print jobs
    qstate = 0  ##queue is empty
    print "queue state is:", qstate

  else:
    os.popen('lpc restart') ## Restart print queue if needed

print "Passed qstate test"  ##  print qstate  ##qstate is 1 for jobs in queue and 0 for queue empty

## Turn off printer
## Check if successful, if not, send signal again to power off.

while printer_state != 1:  #1 equals off
  printer_state = GPIO.input(24)
  GPIO.output(23, 0)  #Turn printer off

GPIO.cleanup()