Improve reconnect, logging

src/fresh.cpp

@@ -50,9 +50,16 @@ uint32_t getEpochTime() {
 bool isMessageTimeAcceptable(uint32_t t) {
     uint32_t localTime = getEpochTime();
     if (localTime == 0) {
+        Serial.println("No epoch time available");
         return false;
     }
-    return t < localTime + allowedOffset && t > localTime - allowedOffset;
+    if (t > localTime + allowedOffset) {
+        return false;
+    }
+    if (t < localTime - allowedOffset) {
+        return false;
+    }
+    return true;
 }
 
 void prepareMessageCounterUsage() {
@@ -68,16 +75,14 @@ uint32_t getNextMessageCounter() {
 }
 
 void printMessageCounter() {
-    Serial.printf("[INFO] Next message number: %d\n", getNextMessageCounter());
+    Serial.printf("[INFO] Next message number: %u\n", getNextMessageCounter());
 }
 
 bool isMessageCounterValid(uint32_t counter) {
     return counter >= getNextMessageCounter();
 }
 
-void didUseMessageCounter(uint32_t counter) {
-    // Store the next counter, so that resetting starts at 0
-    counter += 1;
+void setMessageCounter(uint32_t counter) {
     EEPROM.write(0, (counter >> 24) & 0xFF);
     EEPROM.write(1, (counter >> 16) & 0xFF);
     EEPROM.write(2, (counter >>  8) & 0xFF);
@@ -86,7 +91,12 @@ void didUseMessageCounter(uint32_t counter) {
     EEPROM.commit();
 }
 
+void didUseMessageCounter(uint32_t counter) {
+    // Store the next counter, so that resetting starts at 0
+    setMessageCounter(counter+1);
+}
+
 void resetMessageCounter() {
-    didUseMessageCounter(0);
+    setMessageCounter(0);
     Serial.println("[WARN] Message counter reset");
 }

src/main.cpp

@@ -48,7 +48,7 @@ constexpr int32_t timeOffsetDaylightSavings = 3600;
 // Servo is Emax ES08MA II
 
 // The time (in ms) to keep the door button pressed
-constexpr uint32_t lockOpeningDuration = 2000;
+constexpr uint32_t lockOpeningDuration = 1500;
 
 // The timer to use to control the servo
 constexpr int pwmTimer = 0;
@@ -60,7 +60,7 @@ constexpr int servoPin = 14;
 constexpr int servoFrequency = 50;
 
 // The microseconds to set the servo to the pressed and released states
-constexpr int servoPressedState = 1600;
+constexpr int servoPressedState = 1720;//1600;
 constexpr int servoReleasedState = 1520;
 
 
@@ -85,26 +85,48 @@ void setup() {
     Serial.println("[INFO] Servo configured");
 
     prepareMessageCounterUsage();
+    //resetMessageCounter();
     printMessageCounter();
 
-    Serial.printf("[INFO] Connecting to WiFi '%s'\n", wifiSSID);
-    WiFi.begin(wifiSSID, wifiPassword);
-    while(WiFi.status() != WL_CONNECTED) {
-        delay(100);
-    }
-    Serial.println("[INFO] WiFi connected");
-
-    configureNTP(timeOffsetToGMT, timeOffsetDaylightSavings, ntpServerUrl);
-    printLocalTime();
-    
     server.onMessage(handleReceivedMessage);
-    Serial.printf("[INFO] Opening SSL socket %s%s on port %d\n", serverUrl, serverPath, serverPort);
-    server.connectSSL(serverAccessKey);
 }
 
+uint32_t nextWifiReconnect = 0;
+bool isReconnecting = false;
+
 void loop() {
+    uint32_t time = millis();
+
     server.loop();
     servo.loop();
+    
+    // Reconnect to WiFi
+    if(time > nextWifiReconnect && WiFi.status() != WL_CONNECTED) {
+        Serial.println("[INFO] Reconnecting WiFi...");
+        WiFi.begin(wifiSSID, wifiPassword);
+        isReconnecting = true;
+        nextWifiReconnect = time + wifiReconnectInterval;
+    }
+    if (isReconnecting && WiFi.status() == WL_CONNECTED) {
+        isReconnecting = false;
+        Serial.println("[INFO] WiFi connected, opening socket");
+        server.connectSSL(serverAccessKey);
+        configureNTP(timeOffsetToGMT, timeOffsetDaylightSavings, ntpServerUrl);
+        printLocalTime();
+    }
+}
+
+SesameEvent processMessage(AuthenticatedMessage* message) {
+    if (!isMessageCounterValid(message->message.id)) {
+        return SesameEvent::MessageCounterInvalid;
+    }
+    if (!isMessageTimeAcceptable(message->message.time)) {
+        return SesameEvent::MessageTimeMismatch;
+    }
+    if (!isAuthenticMessage(message, remoteKey, keySize)) {
+        return SesameEvent::MessageAuthenticationFailed;
+    }
+    return SesameEvent::MessageAccepted;
 }
 
 /**
@@ -118,25 +140,21 @@ void loop() {
  * @return The event to signal to the server.
  */
 SesameEvent handleReceivedMessage(AuthenticatedMessage* message, AuthenticatedMessage* response) {
+    SesameEvent event = processMessage(message);
     
-    if (!isMessageCounterValid(message->message.id)) {
-        return SesameEvent::MessageCounterInvalid;
-    }
-    if (!isMessageTimeAcceptable(message->message.time)) {
-        return SesameEvent::MessageTimeMismatch;
-    }
-    if (!isAuthenticMessage(message, remoteKey, keySize)) {
-        return SesameEvent::MessageAuthenticationFailed;
+    // Only open when message is valid
+    if (event == SesameEvent::MessageAccepted) {
+        didUseMessageCounter(message->message.id);
+        // Move servo
+        servo.pressButton();
+        Serial.printf("[Info] Accepted message %d\n", message->message.id);
     }
 
+    // Create response for all cases
     response->message.time = getEpochTime();
     response->message.id = getNextMessageCounter();
     if (!authenticateMessage(response, localKey, keySize)) {
         return SesameEvent::MessageAuthenticationFailed;
     }
-
-    // Move servo
-    servo.pressButton();
-    Serial.printf("[Info] Accepted message %d\n", message->message.id);
-    return SesameEvent::MessageAccepted;
+    return event;
 }

src/server.cpp

@@ -1,5 +1,9 @@
 #include "server.h"
 
+constexpr int32_t pingInterval = 10000;
+constexpr uint32_t pongTimeout = 5000;
+uint8_t disconnectTimeoutCount = 3;
+
 ServerConnection::ServerConnection(const char* url, int port, const char* path) : 
     url(url), port(port), path(path) {
 
@@ -12,6 +16,9 @@ void ServerConnection::connect(const char* key, uint32_t reconnectTime) {
 }
 
 void ServerConnection::connectSSL(const char* key, uint32_t reconnectTime) {
+    if (socketIsConnected) {
+        return;
+    }
     this->key = key;
     webSocket.beginSSL(url, port, path);
     registerEventCallback();
@@ -47,6 +54,7 @@ switch(type) {
         socketIsConnected = true;
         webSocket.sendTXT(key);
         Serial.printf("[INFO] Socket connected to url: %s\n", payload);
+        webSocket.enableHeartbeat(pingInterval, pongTimeout, disconnectTimeoutCount);
         break;
     case WStype_TEXT:
         sendFailureResponse(SesameEvent::TextReceived);
@@ -55,6 +63,7 @@ switch(type) {
         processReceivedBytes(payload, length);
         break;
     case WStype_PONG:
+        break;
     case WStype_PING:
     case WStype_ERROR:
     case WStype_FRAGMENT_TEXT_START: