diff --git a/.gitignore b/.gitignore
index 03910c478c78239a6a357f2af0567dc56349f73f..8340c174917cfac2f69f880ddca4ca8e1340eb63 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@
 
 # User-specific configuration
 /src/settings.toml
+
+# vim swap files
+*~
diff --git a/scripts/repl b/scripts/repl
index 54a68faea363825fa49e50783ee46f7c0cbb1c10..84ebe38a5a6e9ea7ec709fe505f67dd8e1cd2363 100755
--- a/scripts/repl
+++ b/scripts/repl
@@ -2,7 +2,7 @@
 
 set -euo pipefail
 
-device=$(ls -1 -t /dev/tty.usbmodem*)
+device=$(ls -1 -t /dev/ttyACM*)
 
 # Reattach to an existing session if one exists; otherwise create a new one
 screen -D -R -S circuitpython "$device" 115200
diff --git a/src/code.py b/src/code.py
index 646c674f2536f02c723adb7305b83cec7c665a55..0e03063ae41bdcc82a67539e007fcd1cdcdd9e8e 100644
--- a/src/code.py
+++ b/src/code.py
@@ -22,8 +22,8 @@ def main(logger: adafruit_logging.Logger) -> None:
     led = digitalio.DigitalInOut(board.LED)
     led.switch_to_output()
 
-    switch_io = digitalio.DigitalInOut(board.GP22)
-    # GPIO 22 has a pull-up resistor so we don't pull it up in code
+    switch_io = digitalio.DigitalInOut(board.GP18)
+    switch_io.pull = digitalio.Pull.DOWN
     switch_io.switch_to_input()
     switch = adafruit_debouncer.Debouncer(switch_io)
 
@@ -58,7 +58,7 @@ def main(logger: adafruit_logging.Logger) -> None:
     logger.info("Connected to the MQTT broker")
 
     mqtt_device_id = binascii.hexlify(microcontroller.cpu.uid).decode("utf-8")
-    mqtt_state_topic = f"door/{mqtt_device_id}/state"
+    mqtt_state_topic = f"door/ucc-door/state"
     publish_homeassistant_discovery_message(mqtt, mqtt_device_id, mqtt_state_topic)
     publish_sensor_state_message(mqtt, mqtt_state_topic, not switch.value)
     logger.info("Advertised Home Assistant discovery message and current door state")
@@ -69,7 +69,7 @@ def main(logger: adafruit_logging.Logger) -> None:
         mqtt.loop()
 
         if switch.rose or switch.fell:
-            is_door_open = not switch.value
+            is_door_open = switch.value
             logger.info(
                 "Detected the door open" if is_door_open else "Detected the door closed"
             )
diff --git a/src/mqtt.py b/src/mqtt.py
index 6ae14fe4268eed0fe7afe2859eda1585503ee864..53b70d209544e746732347f1489f0df3c84d9f53 100644
--- a/src/mqtt.py
+++ b/src/mqtt.py
@@ -9,16 +9,16 @@ def publish_homeassistant_discovery_message(
         json.dumps(
             {
                 "unique_id": device_id,
-                "name": "Garage Door",
-                "object_id": "garage_door",
+                "name": "UCC Door",
+                "object_id": "door",
                 "device": {
-                    "name": "Door Sensor",
+                    "name": "UCC Door Sensor",
                     "identifiers": [device_id],
                     "model": "Raspberry Pi Pico W Door Sensor",
                     "manufacturer": "Raspberry Pi",
-                    "suggested_area": "garage",
+                    "suggested_area": "UCC Door",
                 },
-                "device_class": "garage_door",
+                "device_class": "door",
                 "state_topic": state_topic,
             }
         ),