PIR sensor Motion Detection count Write to Text File in python
Question: I need to Write "pir sensor" motion detection COUNT to text file.

I tried with this code and this is work without writing to text file. when I
put write to file it gives an error `file = open("textFile.txt", "w")`
`IndentationError: unindent does not matchanyouter indentation level.`
Expected Output is last motion count number in text file.

code is

    
    
        # Import required Python libraries
        import time
        import RPi.GPIO as GPIO
        GPIO.setmode(GPIO.BCM)
        # Define GPIO to use on Pi
        GPIO_PIR = 7
     # Set pin as input
    
      GPIO.setup(GPIO_PIR,GPIO.IN) 
    
    
      Current_State  = 0
    
    Previous_State = 0
    
        # I put  Variable= 0 for the motion Count
     Variable= 0
           try:
                   print "Waiting for PIR to settle ..."
    
          # Loop until PIR output is 0
          while GPIO.input(GPIO_PIR)==1:
            Current_State  = 0
               print "  Ready"
     # Loop until users quits with CTRL-C
      while True :
    
        # Read PIR state
        Current_State = GPIO.input(GPIO_PIR)
    
        if Current_State==1 and Previous_State==0:
          # PIR is triggered
          start_time=time.time()
          print "  Motion detected!"
    
          # here I need to write numbers for the text file.
          file = open("textFile.txt", "w")
          file.write(Variable)
          file.close()
          Variable+=1
    
          # Record previous state
          Previous_State=1
        elif Current_State==0 and Previous_State==1:
          # PIR has returned to ready state
          stop_time=time.time()
          print "  Ready ",
          elapsed_time=int(stop_time-start_time)
          print " (Elapsed time : " + str(elapsed_time) + " secs)"
          Previous_State=0
    
    except KeyboardInterrupt:
      print "  Quit"
      # Reset GPIO settings
      GPIO.cleanup()
    


Answer: 
    import RPi.GPIO as GPIO
    import time
    
    # Use BCM GPIO references
    # instead of physical pin numbers
    GPIO.setmode(GPIO.BCM)
    
    # Define GPIO to use on Pi
    GPIO_PIR = 7
    
    print "PIR Module Test (CTRL-C to exit)"
    
    # Set pin as input
    GPIO.setup(GPIO_PIR,GPIO.IN)      # Echo
    
    Current_State  = 0
    Previous_State = 0
    Variable=0 
    
    try:
    
      print "Waiting for PIR to settle ..."
    
      # Loop until PIR output is 0
      while GPIO.input(GPIO_PIR)==1:
        Current_State  = 0    
    
      print "  Ready"    
    
      # Loop until users quits with CTRL-C
      while True :
    
        # Read PIR state
        Current_State = GPIO.input(GPIO_PIR)
    
        if Current_State==1 and Previous_State==0:
          # PIR is triggered
          print "  Motion detected!"
          # Record previous state
          Previous_State=1
          file = open("textFile.txt", "w")
          file.write(Variable)
          file.close()
          Variable+=1
        elif Current_State==0 and Previous_State==1:
          # PIR has returned to ready state
          print "  Ready"
          Previous_State=0
    
        # Wait for 10 milliseconds
        time.sleep(0.01)      
    
    except KeyboardInterrupt:
      print "  Quit"
      # Reset GPIO settings
    

This is my friend's code. (I believe nothing is wrong with your code but a few
Indentation Error(e.g. spacing Error) For that you can use some sort of text
editor (I use sublime text)

