@@ -33,7 +33,7 @@ void setup() {
 Serial.begin(115200);
 
 // Set BTN_STOP_ALARM to input mode
-pinMode(BTN_STOP_ALARM, INPUT);
+pinMode(BTN_STOP_ALARM, INPUT_PULLUP);
 
 // Create semaphore to inform us when the timer has fired
 timerSemaphore = xSemaphoreCreateBinary();