Door Sensor Working

I finally got the Magnetic Switch / Door Open sensor working. My wiring isn't "exactly" like anything I saw on the Web.

There are 2 undifferentiated wires out of the device. In the try that worked I connected:

wire 1 to 10K resistor to GND

wire 2 to a GPIO pin (e.g., 25 for code below)

Here's a messy pic:

Here's my crude (but working) Python code:

#!/usr/bin/python

import time

import RPi.GPIO as GPIO

GPIO.setwarnings(False)

GPIO.setmode(GPIO.BCM)

DOOR_pin = 25 # 1 wire->10kRes->GND, other->GPIO25

LED_pin = 17

GPIO.setup(DOOR_pin, GPIO.IN)

GPIO.setup(LED_pin, GPIO.OUT)

tm = 0

changes = 0

last = 0

h = 0

for x in range(20): # tries

        m = GPIO.input(DOOR_pin)

        if m:  # Mag. sw open detected

                if last != m:

                        GPIO.output(LED_pin,GPIO.HIGH) # LED on

                        tm = time.strftime("%y, %m/%d:%H:%M:%S")

                        print tm #temp -- should log

        else:

                if last:

                        GPIO.output(LED_pin,GPIO.LOW) # LED off

        if m==1 and last==0 

                changes += 1

        h += m

        last = m

        time.sleep(2)

print "m's:", h

print 'changes:', changes

GPIO.cleanup()

The 2 halves of the sensor have to be about .5" apart to register "ON" (HIGH).

Now for my photo sensor.