/*
 * ESP32 AJAX Demo
 * Updates and Gets data from webpage without page refresh
 * https://circuits4you.com
 */
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>

#include "index.h"  //Web page header file

WebServer server(80);

//Enter your SSID and PASSWORD
const char* ssid = "your network";
const char* password = "your password";

int capPins[] = {4,12,27,33};
float readings = 7.0;
int maxcapacitance = 20;  // currently not being used

//===============================================================
// This routine is executed when you open its IP in browser
//===============================================================
void handleRoot() {
 String s = MAIN_page; //Read HTML contents
 server.send(200, "text/html", s); //Send web page
}
 
void hold0() {
 int sum = 0;
 for(int i = 0; i<readings; i++){ sum+= touchRead(capPins[0]); }
 String adcValue1 = String(sum/readings);
 server.send(200, "text/plane", adcValue1); //Send ADC value only to client ajax request
}

void hold1() {
 int sum = 0;
 for(int i = 0; i<readings; i++){ sum+= touchRead(capPins[1]); }
 String adcValue1 = String(sum/readings);
 server.send(200, "text/plane", adcValue1); //Send ADC value only to client ajax request
}

void hold2() {
 int sum = 0;
 for(int i = 0; i<readings; i++){ sum+= touchRead(capPins[2]); }
 String adcValue1 = String(sum/readings);
 server.send(200, "text/plane", adcValue1); //Send ADC value only to client ajax request
}

void hold3() {
 int sum = 0;
 for(int i = 0; i<readings; i++){ sum+= touchRead(capPins[3]); }
 String adcValue1 = String(sum/readings);
 server.send(200, "text/plane", adcValue1); //Send ADC value only to client ajax request
}

//===============================================================
// Setup
//===============================================================

void setup(void){
  Serial.begin(115200);
  Serial.println();
  Serial.println("Booting Sketch...");

/*
//ESP32 As access point
  WiFi.mode(WIFI_AP); //Access Point mode
  WiFi.softAP(ssid, password);
*/
//ESP32 connects to your wifi -----------------------------------
  WiFi.mode(WIFI_STA); //Connectto your wifi
  WiFi.begin(ssid, password);

  Serial.println("Connecting to ");
  Serial.print(ssid);

  //Wait for WiFi to connect
  while(WiFi.waitForConnectResult() != WL_CONNECTED){      
      Serial.print(".");
    }
    
  //If connection successful show IP address in serial monitor
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());  //IP address assigned to your ESP
//----------------------------------------------------------------
 
  server.on("/", handleRoot);      //This is display page
  server.on("/hold0", hold0);//To get update of ADC Value only
  server.on("/hold1", hold1);//To get update of ADC Value only
  server.on("/hold2", hold2);//To get update of ADC Value only
  server.on("/hold3", hold3);//To get update of ADC Value only
 
  server.begin();                  //Start server
  Serial.println("HTTP server started");
}

//===============================================================
// This routine is executed when you open its IP in browser
//===============================================================
void loop(void){
  server.handleClient();
  delay(1);
}