New state machine, local UDP route

include/controller.h

@@ -6,17 +6,46 @@
 #include "configurations/EthernetConfiguration.h"
 #include "configurations/KeyConfiguration.h"
 
+enum class SesameDeviceStatus {
+
+    /**
+     * @brief The initial state of the device after boot
+     */
+    initial,
+
+    /**
+     * @brief The device has configured the individual parts,
+     * but has no the ethernet hardware detected.
+     */
+    configuredButNoEthernetHardware,
+
+    /**
+     * @brief The device has ethernet hardware, but no ethernet link
+     */
+    ethernetHardwareButNoLink,
+
+    /**
+     * @brief The device has an ethernet link, but no IP address.
+     */
+    ethernetLinkButNoIP,
+
+    /**
+     * @brief The device has an IP address, but no socket connection
+     */
+    ipAddressButNoSocketConnection,
+};
+
 class SesameController: public ServerConnectionCallbacks {
 
 public:
-    SesameController();
-
-    void configure(ServoConfiguration servoConfig, ServerConfiguration serverConfig, EthernetConfiguration ethernetConfig, KeyConfiguration keyConfig);
+    SesameController(ServoConfiguration servoConfig, ServerConfiguration serverConfig, EthernetConfiguration ethernetConfig, KeyConfiguration keyConfig);
 
     void loop(uint32_t millis);
 
 private:
 
+    SesameDeviceStatus status = SesameDeviceStatus::initial;
+
     uint32_t currentTime = 0;
 
     ServerConnection server;
@@ -26,7 +55,7 @@ private:
 
     // An EthernetUDP instance to send and receive packets over UDP
     EthernetUDP udp;
-
+    EthernetHardwareStatus ethernetStatus;
     EthernetConfiguration ethernetConfig;
     bool ethernetIsConfigured = false;
 
@@ -42,6 +71,31 @@ private:
     uint32_t currentServerChallenge;
 
     SignedMessage outgoingMessage;
+
+    // MARK: Ethernet
+
+    void initializeSpiBusForEthernetModule();
+
+    /**
+     * @brief Checks to ensure that Ethernet hardware is available
+     * 
+     * @return true The hardware is available
+     * @return false The hardware is missing
+     */
+    bool hasAvailableEthernetHardware();
+
+    /**
+     * @brief Check that an active ethernet link is available
+     * 
+     * @return true Link is available
+     * @return false Link is absent
+     */
+    bool hasEthernetLink();
+
+    void configureEthernet();
+
+    void startUDP();
+    void stopUDP();
     
     bool hasCurrentChallenge() {
         return currentChallengeExpiry > currentTime;

include/server.h

@@ -46,14 +46,16 @@ class ServerConnection {
 
 public:
 
-    ServerConnection();
+    ServerConnection(ServerConfiguration configuration);
 
     /**
      * @brief Set the configuration and the callback handler
      * 
      * @param callback The handler to handle messages and errors
      */
-    void configure(ServerConfiguration configuration, ServerConnectionCallbacks* callbacks);
+    void setCallbacks(ServerConnectionCallbacks* callbacks);
+
+    void shouldConnect(bool connect);
 
     /**
      * @brief Call this function regularly to handle socket operations.
@@ -73,7 +75,8 @@ public:
 
 private:
 
-    uint32_t currentTime;
+    uint32_t currentTime = 0;
+    bool shouldBeConnected = false;
 
     bool socketIsConnected() {
         return webSocket.isConnected();
@@ -81,15 +84,12 @@ private:
 
     void connect();
 
-    void disconnect();
-
-    bool shouldReconnect = true;
     bool isConnecting = false;
+    bool isDisconnecting = false;
     uint32_t connectionTimeout = 0;
     uint32_t nextReconnectAttemptMs = 0;
 
-    void didDisconnect();
-    void didConnect();
+    void didChangeConnectionState(bool isConnected);
 
 
     ServerConfiguration configuration;

include/servo.h

@@ -52,15 +52,10 @@ public:
 
     /**
      * @brief Construct a new servo controller
-     */
-    ServoController();
-
-    /**
-     * @brief Configure the servo
      * 
      * @param The configuration for the servo
      */
-    void configure(ServoConfiguration configuration);
+    ServoController(ServoConfiguration configuration);
 
     /**
      * @brief Update the servo state periodically