Allow the ESP32TimeLapseCam the option of running in AP mode, for use in the field.

TimeLapse/TimeLapse.ino

@@ -3,8 +3,9 @@
 #include "camera.h"
 #include "lapse.h"
 
-const char *ssid = "...";
-const char *password = "...";
+const char* ssid = "...";
+const char* password = "...";
+const char* ap_password = "esp32_time_lapse"; // password to connect to this esp32 when in AP mode
 
 void startCameraServer();
 
@@ -13,21 +14,107 @@ void setup()
 	Serial.begin(115200);
 	Serial.setDebugOutput(true);
 	Serial.println();
+ 
 	initFileSystem();
 	initCamera();
 
-	WiFi.begin(ssid, password);
-	while (WiFi.status() != WL_CONNECTED)
+  int wifiMode = determineWifiMode();
+  Serial.printf("Wifi Mode: %u\n", wifiMode);
+  initWifi(wifiMode);
+
+	startCameraServer();
+	Serial.print("Camera Ready! Use 'http://");
+  if (wifiMode == 0)
   {
+	  Serial.print(WiFi.softAPIP());
+  }
+  else
+  {
+    Serial.print(WiFi.localIP());
+  }
+	Serial.println("' to connect");
+}
+
+// Determine on boot: 0 = AP Mode, 1 = STA Mode
+int determineWifiMode()
+{
+    Serial.println("Scan start..");
+
+    // WiFi.scanNetworks will return the number of networks found
+    int n = WiFi.scanNetworks();
+    Serial.println("Scan complete :)");
+    if (n == 0) {
+        Serial.println("No networks found :(");
+        return 0;
+    } else {
+        Serial.print(n);
+        Serial.println(" networks found:");
+        for (int i = 0; i < n; ++i) {
+            // Print SSID and RSSI for each network found
+            Serial.print(i + 1);
+            Serial.print(": ");
+            Serial.print(WiFi.SSID(i));
+            Serial.print(" (");
+            Serial.print(WiFi.RSSI(i));
+            Serial.print(")");
+            Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
+            delay(10);
+            if (WiFi.SSID(i).equals(ssid)) {
+              return 1;
+            }
+        }
+    }
+
+    return 0;
+}
+
+void initWifi(int wifiMode)
+{
+  if (wifiMode == 0)
+  {
+    // IP address of the ESP32 when in AP mode
+    IPAddress apIP = IPAddress(192, 168, 1, 101);
+    const char *hostname = "esp32TimeLapseCam";
+    
+    Serial.println("Starting softAP");
+    WiFi.mode(WIFI_AP);
+    WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
+    bool result = WiFi.softAP(hostname, ap_password, 1, 0);
+    if (!result)
+    {
+        Serial.println("AP Config failed.");
+        return;
+    }
+    else
+    {
+        Serial.println("=======================================");
+        Serial.println("AP Config Success.");
+        Serial.print("AP MAC: ");
+        Serial.println(WiFi.softAPmacAddress());
+
+        IPAddress ip = WiFi.softAPIP();
+        Serial.print("IP Address: ");
+        Serial.println(ip);
+
+        Serial.print("AP Name: ");
+        Serial.println(hostname);
+
+        Serial.print("AP Password: ");
+        Serial.println(ap_password);
+        Serial.println("=======================================");
+    }
+  }
+  else {
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid, password);
+
+    while (WiFi.status() != WL_CONNECTED) {
       delay(500);
       Serial.print(".");
     }
     Serial.println("");
     Serial.println("WiFi connected");
-	startCameraServer();
-	Serial.print("Camera Ready! Use 'http://");
-	Serial.print(WiFi.localIP());
-	Serial.println("' to connect");
+  }  
 }
 
 void loop()