diff --git a/door-thing-firmware/src/main.cpp b/door-thing-firmware/src/main.cpp
index 61face8..8e674ec 100644
--- a/door-thing-firmware/src/main.cpp
+++ b/door-thing-firmware/src/main.cpp
@@ -58,6 +58,8 @@ void loop()
 
         // while the central is still connected to peripheral:
         bool oldState = digitalRead(SWITCH_PIN);
+        switchCharacteristic.writeValue(oldState);
+
         while (central.connected())
         {
             // read the switch state: