added wifi connection and menu showing connection details

include/menu.h

@@ -6,6 +6,7 @@
 
 enum class MenuAction
 {
+  ShowInternetDetails,
   ShowHelloWorld,
   BackToCarousel
 };

include/screens.h

@@ -4,9 +4,11 @@
 #include <U8g2lib.h>
 
 #include "am2302_sensor.h"
+#include "wifi_connection.h"
 
 void drawScreen1(U8G2 &u8g2);
 void drawHelloWorldScreen(U8G2 &u8g2);
+void drawInternetConnectionScreen(U8G2 &u8g2, WifiConnectionInfo wifiInfo);
 void setEnvironmentReading(Am2302Reading reading);
 void drawEnvironmentScreen(U8G2 &u8g2);
 void drawWeatherIconScreen(U8G2 &u8g2);

include/wifi_connection.h

@@ -0,0 +1,34 @@
+#ifndef WIFI_CONNECTION_H
+#define WIFI_CONNECTION_H
+
+#include <Arduino.h>
+#include <IPAddress.h>
+
+struct WifiConnectionInfo
+{
+  bool shieldAvailable;
+  bool connected;
+  IPAddress ipAddress;
+};
+
+class WifiConnection
+{
+public:
+  WifiConnection();
+  void begin(unsigned long now);
+  void update(unsigned long now);
+  WifiConnectionInfo info() const;
+  bool consumeDirty();
+
+private:
+  void connect(unsigned long now);
+  void recordStatus();
+
+  unsigned long nextAttempt_;
+  bool shieldAvailable_;
+  bool connected_;
+  IPAddress ipAddress_;
+  bool dirty_;
+};
+
+#endif

include/wifi_credentials.example.h

@@ -0,0 +1,7 @@
+#ifndef WIFI_CREDENTIALS_H
+#define WIFI_CREDENTIALS_H
+
+const char WIFI_SSID[] = "your-wifi-name";
+const char WIFI_PASSWORD[] = "your-wifi-password";
+
+#endif