Add 10 second timeout to armed state

firmware/firmware.ino

@@ -41,6 +41,7 @@ typedef struct __attribute__((packed)) cardData {
 #define LED_PIN_OFF !LED_PIN_ON
 
 #define DELAY_TIME 10
+#define LOCK_ARMED_TIMEOUT 1000
 #define COMM_LOCK_IDLE_TIME 50
 #define COMM_CARD_IDLE_TIME 1000
 #define LED_ARMED_BLINK_TIME 50
@@ -247,6 +248,10 @@ void relayOff() { digitalWrite(RELAY_PIN, RELAY_OPEN); }
 
 void processLockState()
 {
+	static uint16_t lockArmedTimeoutCount;
+
+	if (lockState != LOCK_ARMED) lockArmedTimeoutCount = 0;
+
 	switch (lockState) {
 		case LOCK_OFF:
 			if (LEDState != LED_ERROR) LEDState = LED_OFF;
@@ -266,6 +271,7 @@ void processLockState()
 			if (LEDState != LED_ERROR) LEDState = LED_ARMED;
 
 			relayOff();
+			lockArmedTimeoutCount++;
 
 			if (redButton()) {
 				if (LOGGING) Serial.println("[INFO] Unarming interlock.");
@@ -274,6 +280,11 @@ void processLockState()
 				if (LOGGING) Serial.println("[INFO] On button pressed.");
 				lockState = LOCK_ON_PRESSED;
 			}
+
+			if (lockArmedTimeoutCount > LOCK_ARMED_TIMEOUT) {
+				if (LOGGING) Serial.println("[INFO] Arming timed out, disarming.");
+				lockState = LOCK_OFF;
+			}
 			break;
 		case LOCK_ON_PRESSED:
 			if (redButton()) {