initial commit. basic structure. untested.

src/main.cpp

@@ -0,0 +1,173 @@
+#include <Arduino.h>
+#include <AsyncElegantOTA.h>
+
+//Peripherals includes
+#include <Wire.h>
+#include <SPI.h>
+
+//Web server includes
+#include <AsyncElegantOTA.h>
+#include <FS.h>
+#include "SPIFFS.h"
+#include <ESPmDNS.h>
+#include <WiFi.h>
+#include <AsyncTCP.h>
+#include <ESPAsyncWebServer.h>
+#include <SPIFFSEditor.h>
+#include <Arduino_JSON.h>
+
+#include <Preferences.h>
+Preferences settings;
+
+#define LED_PIN 2
+
+//*********************************************************
+// Web server variable declarations
+//*********************************************************
+
+// Create AsyncWebServer object on port 80
+AsyncWebServer server(80);
+AsyncWebSocket ws("/ws");
+AsyncEventSource events("/events");
+
+//Variables to save values from HTML form
+JSONVar scannedSSIDs;
+String ssid;
+String pass;
+String ip;
+String gateway;
+int timesConnected = 0;
+
+const String http_username = "admin";
+const String http_password = "admin";
+
+IPAddress localIP;
+//IPAddress localIP(192, 168, 1, 200); // hardcoded
+
+// Set your Gateway IP address
+IPAddress localGateway;
+//IPAddress localGateway(192, 168, 1, 1); //hardcoded
+IPAddress subnet(255, 255, 0, 0);
+
+// Timer variables
+unsigned long previousMillis = 0;
+const long interval = 10000;  // interval to wait for Wi-Fi connection (milliseconds)
+#define WIFI_TIMEOUT 10000
+
+// Stores LED state
+String ledState;
+
+
+// function declarations
+
+
+
+void setup() {
+}
+
+void loop() {
+}
+
+// functions
+// Initialize SPIFFS
+void initSPIFFS() {
+  if (!SPIFFS.begin(true)) {
+    Serial.println("An error has occurred while mounting SPIFFS");
+  }
+  Serial.println("SPIFFS mounted successfully");
+}
+
+// Initialize WiFi
+bool initWiFi() {
+
+//scan nearby networks
+WiFi.mode(WIFI_STA);
+int n = WiFi.scanNetworks();
+if(n){
+  //networks found, try to connect
+  String availableNetworkParams = "";
+  settings.begin("WiFi");
+  for(int i=0;i<n;i++){
+    //["WiFI":
+    //  ["SSID":"pass,ip,gateway,timesConnected",
+    //          ...
+    //  ]
+    //]
+    availableNetworkParams = settings.getString(WiFi.SSID(i).c_str());
+    if(availableNetworkParams.length() > 1){
+      //known network
+      ssid = WiFi.SSID(i).c_str();
+      String netparams[4];
+      int s=0;
+      for(int j=0;j<4;j++){
+        int e = availableNetworkParams.indexOf(",",s);
+        netparams[j]=availableNetworkParams.substring(s,e);
+        s=e+1;
+      }
+      pass = netparams[0];
+      ip = netparams[1];
+      localIP.fromString(ip);
+      gateway = netparams[2];
+      localGateway.fromString(gateway);
+      timesConnected = netparams[3].toInt();
+
+      if (WiFi.config(localIP, localGateway, subnet)){
+        WiFi.begin(ssid.c_str(), pass.c_str());
+        Serial.println("Connecting to WiFi...");
+
+        unsigned long currentMillis = millis();
+        previousMillis = currentMillis;
+
+        bool res = true;
+
+        while(WiFi.status() != WL_CONNECTED) {
+          currentMillis = millis();
+          if (currentMillis - previousMillis >= WIFI_TIMEOUT) {
+            Serial.println("Failed to connect.");
+            // return false;
+            res = false;
+          }
+          if(!res) break;
+        }
+        // Serial.println(WiFi.localIP());
+        // return true;
+        if(res){
+          //save connection
+          settings.putString(ssid.c_str(),(pass + "," + localIP.toString() + "," + localGateway.toString() + "," + String(timesConnected + 1)).c_str());
+          //initWiFi() true
+          return true;
+        }
+      }else{
+        Serial.println("STA Failed to configure");
+        //return false;
+      }
+    }
+  }
+  settings.end();
+}
+  //no networks found
+  Serial.println("Setting AP (Access Point)");
+  // NULL sets an open Access Point
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("ESP-WIFI", NULL);
+
+  localIP = WiFi.softAPIP();
+  Serial.print("AP IP address: ");
+  Serial.println(localIP);
+  return false;
+
+}
+
+// Replaces placeholder with LED state value
+String getLEDState(const String& var) {
+  if(var == "STATE") {
+    if(digitalRead(LED_PIN)) {
+      ledState = "ON";
+    }
+    else {
+      ledState = "OFF";
+    }
+    return ledState;
+  }
+  return String();
+}