diff --git a/freezer.py b/freezer.py
new file mode 100644
index 0000000..293e504
--- /dev/null
+++ b/freezer.py
@@ -0,0 +1,48 @@
+# in rc.local:
+#   su pi -c 'python3 /home/pi/freezer.py >> /home/pi/freezer.log 2>&1 &'
+
+import RPi.GPIO as GPIO
+import urllib.request
+import logging
+import logging.handlers as handlers
+import time
+import cherrypy # https://docs.cherrypy.org/en/latest/tutorials.html#tutorial-1-a-basic-web-application
+import requests, json
+
+
+cherrypy.config.update({
+    'server.socket_host' : '192.168.178.111',
+    'server.socket_port' : 8081,
+})
+
+logger = logging.getLogger('Rotating Log')
+logger.setLevel(logging.INFO)
+logHandler = handlers.RotatingFileHandler('/home/pi/freezer.log', maxBytes=1000000, backupCount=2)
+logHandler.setLevel(logging.INFO)
+logHandler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s - %(message)s', '%Y-%m-%d %H:%M:%S'))
+logger.addHandler(logHandler)
+
+
+PIN_REED_SENSOR = 21
+
+GPIO.setmode(GPIO.BCM)
+GPIO.setup(PIN_REED_SENSOR, GPIO.IN, GPIO.PUD_UP)
+
+
+def door_change(channel):
+    logger.info('open: ' + str(GPIO.input(PIN_REED_SENSOR) == 1).lower())
+
+
+class FreezerService(object):
+    @cherrypy.expose
+    def index(self):
+        return '{ "open": ' + str(GPIO.input(PIN_REED_SENSOR) == 1).lower() + ' }'
+
+GPIO.add_event_detect(PIN_REED_SENSOR, GPIO.BOTH, callback=door_change, bouncetime=250)
+
+logger.info('Initializing')
+
+cherrypy.quickstart(FreezerService())
+logger.info('Shutdown')
+logger.info('Reset GPIO configuration and close')
+GPIO.cleanup()
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