Make auto-lock non-blocking

DoorLock.ino

@@ -2,43 +2,54 @@
 #include "Doorbell.h"
 #include "Lock.h"
 
-int doorbellPin = 15; //input pin from doorbell, the other cable must go to GND
-int relayPin = 22;  // choose a pin to control the relay
+int doorbellPin = 12; // input pin from doorbell, the other cable must go to GND
+int relayPin = 13;  // choose a pin to control the relay
+int openTime = 3000; // time in ms the lock should remain open before auto-closing
 
+DoorLock *doorlock; // define doorlock globally to be able to reference it in void loop
+unsigned long unlockTime = 0; // variable to store time when doorlock was opened
 
 void setup()
 {
   Serial.begin(115200);
-  homeSpan.setLogLevel(1); 
-
-  homeSpan.setPairingCode("11122333");
-  homeSpan.setQRID("111-22-333");
-  homeSpan.setWifiCredentials("WIFI_NAME","WIFI_PASSWORD"); // change credentials
 
   homeSpan.begin(Category::Other,"Intercom");
 
-  // set pins as dry contact 
-  pinMode(relayPin, OUTPUT);         
-
-
-  new SpanAccessory();  
+  // set pins as dry contact
+  pinMode(relayPin, OUTPUT);
+
+  new SpanAccessory();
     new Service::AccessoryInformation();
       new Characteristic::Identify();
       new Characteristic::Name("Doorbell");
     new DoorBell(doorbellPin);
 
-  new SpanAccessory();  
+  new SpanAccessory();
     new Service::AccessoryInformation();
       new Characteristic::Identify();
       new Characteristic::Name("Lock Button");
-    new DoorLock(relayPin);
-      
+    doorlock=new DoorLock(relayPin);
+
 } // end of setup()
 
 //////////////////////////////////////
 
 void loop()
 {
   homeSpan.poll();
-
+
+  if(doorlock->current->getVal() == 0){ // 0 means that doorlock is open
+    if(unlockTime == 0){ // save current time if not already set
+      unlockTime = millis();
+    }
+
+    if(millis() - unlockTime >= openTime){ // when openTime amount of milliseconds passed, lock again
+      doorlock->target->setVal(1); // 1 means that doorlock should lock
+      doorlock->update();
+      unlockTime = 0; // reset to 0 as doorlock is now locked
+    }
+
+  }else if(unlockTime != 0){ // if door was locked manually before openTime had passed, reset saved unlock time
+    unlockTime = 0;
+  }
 }

Lock.h

@@ -1,7 +1,7 @@
 struct DoorLock : Service::LockMechanism {     // Door LockMechanism
 
-  SpanCharacteristic *current;            // reference to the Current Door State Characteristic 
-  SpanCharacteristic *target;             // reference to the Target Door State Characteristic 
+  SpanCharacteristic *current;            // reference to the Current Door State Characteristic
+  SpanCharacteristic *target;             // reference to the Target Door State Characteristic
 
   int lockPin;
 
@@ -11,7 +11,7 @@ struct DoorLock : Service::LockMechanism {     // Door LockMechanism
 
     current=new Characteristic::LockCurrentState(1);              // initial value of 1 means closed
     target=new Characteristic::LockTargetState(1);                // initial value of 1 means closed
-    
+
     Serial.print("Configuring Door LockMechanism");   // initialization message
     Serial.print("\n");
 
@@ -23,30 +23,24 @@ boolean update(){                              // update() method
 
     if(target->getNewVal()==0){                    // if the target-state value is set to 0, HomeKit is requesting the door to be in open position
       LOG1("Opening Door\n");
-      current->setVal(0);                          // set the current-state value to 0, which means "opening"    
-      LOG1("Current set to 0, opening the gate for 1 second\n");
-      digitalWrite(lockPin, HIGH);                 // close the contact on the relay      
-      delay(1000);                                 // wait for a second
-      LOG1("Door Opened\n");
-      target->setVal(1);                           // lock again
-      LOG1("Target set to 1, closing the gate\n");
-      digitalWrite(lockPin, LOW);                  // open contact on the relay
-      current->setVal(1);     
-      LOG1("Door Closed\n");           
+      digitalWrite(lockPin, HIGH);                 // close the contact on the relay
+      current->setVal(0);                          // set the current-state value to 0, which means "opening"
+      LOG1("Door Open\n");
     } else {
       LOG1("Closing Door\n");
+      digitalWrite(lockPin, LOW);
       current->setVal(1);                          // set the current-state value to 1, which means "closing"
-      LOG1("Door Closed\n");   
+      LOG1("Door Closed\n");
     }
-    
+
     return(true);                                  // return true
 }
 
 void loop(){                                       // loop() method
 
     if(current->getVal()==target->getVal())        // if current-state matches target-state there is nothing do -- exit loop()
       return;
-       
+
   } // loop
-  
+
 };