[Arduino IDE demo source code for KC868-A8]--#10-Web server_code

Code:
/***********************************************************

 * Create Your own WebServer for KC868-A8 Smart Controller*

 * https://www.kincony.com                                **

***********************************************************/



// Load Wi-Fi library

#include <WiFi.h>

#include "PCF8574.h"

#include <WiFiManager.h> 

#define TRIGGER_PIN 0   // reset wifi button

WiFiManager wm;

int timeout =20; // seconds to run for

// Replace with your network credentials

/*******config the WIFI by phone*****************/

 

/* const char* ssid     = "xxx"; //your router's ssid

const char* password = "yyy"; //your router's password*/

/*******************************************************/



// Set web server port number to 80

WiFiServer server(80);



// Variable to store the HTTP request

String header;



// Current time

unsigned long currentTime = millis();

// Previous time

unsigned long previousTime = 0; 

// Define timeout time in milliseconds (example: 2000ms = 2s)

const long timeoutTime = 2000;



int flag_read_di=0;



TwoWire I2Cone = TwoWire(0);



//set I2C of A8

PCF8574 pcf8574_I1(&I2Cone,0x22,4,5);

PCF8574 pcf8574_R1(&I2Cone,0x24,4,5);



String relaystate[8]={"relay1state","relay2state","relay3state","relay4state",

                       "relay5state","relay6state","relay7state","relay8state",

                     };

String relay1state = "off";// state of relay1

String relay2state = "off";// state of relay2

String relay3state = "off";// state of relay3

String relay4state = "off";// state of relay4

String relay5state = "off";// state of relay5

String relay6state = "off";// state of relay6

String relay7state = "off";// state of relay7

String relay8state = "off";// state of relay8





void setup() {



  pinMode(TRIGGER_PIN, INPUT_PULLUP); // wifi reset button

  Serial.begin(115200); 



  // Set PCF8574 pinMode to OUTPUT

  for(int i=0;i<=7;i++)

  {

     pcf8574_R1.pinMode(i, OUTPUT);

  }

  

  pcf8574_R1.begin();

  

  for(int i=0;i<=7;i++)

  {

     pcf8574_I1.pinMode(i, INPUT);

  }

 

    pcf8574_I1.begin();

      



  for(int i=0;i<=7;i++)

  {

     pcf8574_R1.digitalWrite(i, HIGH);

     

  }

    WiFi.mode(WIFI_STA);

    wm.setConfigPortalTimeout(timeout);

     bool res;

       res = wm.autoConnect("KC868-A8-AP"); // anonymous ap

    if(!res) {

        Serial.println("Failed to connect");

    } 

    else {

        //if you get here you have connected to the WiFi    

        Serial.println("connected...yeey :)");

    }   

  

  // Print local IP address and start web server

  Serial.println("");

  Serial.println("WiFi connected.");

  Serial.println("IP address: ");

  Serial.println(WiFi.localIP());

  server.begin();



}



void loop(){

  WiFiClient client = server.available();   // Listen for incoming clients



  if (client) {                             // If a new client connects,

    Serial.println("New Client.");          // print a message out in the serial port

    String currentLine = "";                // make a String to hold incoming data from the client

    currentTime = millis();

    previousTime = currentTime;

    while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected

      currentTime = millis();         

      if (client.available()) {             // if there's bytes to read from the client,

        char c = client.read();             // read a byte, then

        Serial.write(c);                    // print it out the serial monitor

        header += c;

        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.

          // that's the end of the client HTTP request, so send a response:

          if (currentLine.length() == 0) {

            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)

            // and a content-type so the client knows what's coming, then a blank line:

            client.println("HTTP/1.1 200 OK");

            client.println("Content-type:text/html");

            client.println("Connection: close");

            client.println();

            

            // turns 16 relays on and off

            if (header.indexOf("GET /1/on") >= 0) {relay1state = "on";pcf8574_R1.digitalWrite(P0, LOW);}

            else if (header.indexOf("GET /1/off") >= 0) {relay1state = "off";pcf8574_R1.digitalWrite(P0, HIGH);}

            else if (header.indexOf("GET /2/on") >= 0)  {relay2state = "on";pcf8574_R1.digitalWrite(P1, LOW);}

            else if (header.indexOf("GET /2/off") >= 0) {relay2state = "off";pcf8574_R1.digitalWrite(P1, HIGH);}

            else if (header.indexOf("GET /3/on") >= 0)  {relay3state = "on";pcf8574_R1.digitalWrite(P2, LOW);}

            else if (header.indexOf("GET /3/off") >= 0) {relay3state = "off";pcf8574_R1.digitalWrite(P2, HIGH);}         

            else if (header.indexOf("GET /4/on") >= 0)  {relay4state = "on";pcf8574_R1.digitalWrite(P3, LOW);}

            else if (header.indexOf("GET /4/off") >= 0) {relay4state = "off";pcf8574_R1.digitalWrite(P3, HIGH);}

            else if (header.indexOf("GET /5/on") >= 0)  {relay5state = "on";pcf8574_R1.digitalWrite(P4, LOW);}

            else if (header.indexOf("GET /5/off") >= 0) {relay5state = "off";pcf8574_R1.digitalWrite(P4, HIGH);}

            else if (header.indexOf("GET /6/on") >= 0)  {relay6state = "on";pcf8574_R1.digitalWrite(P5, LOW);}

            else if (header.indexOf("GET /6/off") >= 0) {relay6state = "off";pcf8574_R1.digitalWrite(P5, HIGH);}          

            else if (header.indexOf("GET /7/on") >= 0)  {relay7state = "on";pcf8574_R1.digitalWrite(P6, LOW);}

            else if (header.indexOf("GET /7/off") >= 0) {relay7state = "off";pcf8574_R1.digitalWrite(P6, HIGH);}

            else if (header.indexOf("GET /8/on") >= 0)  {relay8state = "on";pcf8574_R1.digitalWrite(P7, LOW);}

            else if (header.indexOf("GET /8/off") >= 0) {relay8state = "off";pcf8574_R1.digitalWrite(P7, HIGH);}

                  

            else if (header.indexOf("GET /read") >= 0) flag_read_di=1;

            else if (header.indexOf("GET /all/on") >= 0)

            {

              relay1state = "on";// state of relay1

              relay2state = "on";// state of relay2

              relay3state = "on";// state of relay3

              relay4state = "on";// state of relay4

              relay5state = "on";// state of relay5

              relay6state = "on";// state of relay6

              relay7state = "on";// state of relay7

              relay8state = "on";// state of relay8



              for(int i=0;i<=7;i++)

              {

                 pcf8574_R1.digitalWrite(i, LOW);

              }

              

            }

            else if (header.indexOf("GET /all/off") >= 0)

            {

              relay1state = "off";// state of relay1

              relay2state = "off";// state of relay2

              relay3state = "off";// state of relay3

              relay4state = "off";// state of relay4

              relay5state = "off";// state of relay5

              relay6state = "off";// state of relay6

              relay7state = "off";// state of relay7

              relay8state = "off";// state of relay8



              for(int i=0;i<=7;i++)

              {

                 pcf8574_R1.digitalWrite(i, HIGH);

              }

               

            }

            

            // Display the HTML web page

            client.println("<!DOCTYPE html><html>");

            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");

            client.println("<link rel=\"icon\" href=\"data:,\">");

            // CSS to style the on/off buttons 

            // Feel free to change the background-color and font-size attributes to fit your preferences

            client.println("<style>html { font-family: Helvetica; display: inline-block; border: 3px solid green;margin: 0px 15px;}");

            client.println(".button { background-color: #195B00; border-radius: 10px;color: white; padding: 10px 40px;");

            client.println("text-decoration: none; font-size: 20px; margin: 2px;text-align: center; cursor: pointer;}");

            client.println(".button2 {background-color: #77878A;}</style></head>");

            

            if (flag_read_di==1)

            {

              client.println(" relay1:" + relay1state + " relay2:" + relay2state + " relay3:" + relay3state + " relay4:" + relay4state + " relay5:" + relay5state + " relay6:" + relay6state + " relay7:" + relay7state + " relay8:" + relay8state);

            }

            else

            {

            // Web Page Heading

            client.println("<body><h1>KC868-A8 Web Server</h1>");





            // Display current state, and ON/OFF buttons for relay

            //client.println("<p>relay1 - State " + relay1state + "</p>");

            // If the relay is off, it displays the ON button      

            if (relay1state == "off") client.println("<a href=\"/1/on\"><button class=\"button\">01-OFF</button></a>"); else client.println("<a href=\"/1/off\"><button class=\"button\">01-ON </button></a>");

            if (relay2state == "off") client.println("<a href=\"/2/on\"><button class=\"button\">02-OFF</button></a>"); else client.println("<a href=\"/2/off\"><button class=\"button\">02-ON </button></a>");                                 

            if (relay3state == "off") client.println("<a href=\"/3/on\"><button class=\"button\">03-OFF</button></a>"); else client.println("<a href=\"/3/off\"><button class=\"button\">03-ON </button></a>");

            if (relay4state == "off") client.println("<a href=\"/4/on\"><button class=\"button\">04-OFF</button></a>"); else client.println("<a href=\"/4/off\"><button class=\"button\">04-ON </button></a>");

            if (relay5state == "off") client.println("<a href=\"/5/on\"><button class=\"button\">05-OFF</button></a>"); else client.println("<a href=\"/5/off\"><button class=\"button\">05-ON </button></a>");

            if (relay6state == "off") client.println("<a href=\"/6/on\"><button class=\"button\">06-OFF</button></a>"); else client.println("<a href=\"/6/off\"><button class=\"button\">06-ON </button></a>");                                 

            if (relay7state == "off") client.println("<a href=\"/7/on\"><button class=\"button\">07-OFF</button></a>"); else client.println("<a href=\"/7/off\"><button class=\"button\">07-ON </button></a>");

            if (relay8state == "off") client.println("<a href=\"/8/on\"><button class=\"button\">08-OFF</button></a>"); else client.println("<a href=\"/8/off\"><button class=\"button\">08-ON </button></a>");

            

              client.println("<a href=\"/all/on\"><button class=\"button\">All-ON</button></a>");

              client.println("<a href=\"/all/off\"><button class=\"button\">All-OFF</button></a>");

            }  

            client.println("</body></html>");

            

            // The HTTP response ends with another blank line

            client.println();

            break;

          } else { // if you got a newline, then clear currentLine

            currentLine = "";

          }

        } else if (c != '\r') {  // if you got anything else but a carriage return character,

          currentLine += c;      // add it to the end of the currentLine

        }

      }

    }

    // Clear the header variable

    header = "";

    // Close the connection

    client.stop();

    Serial.println("Client disconnected.");

    Serial.println("");

    flag_read_di=0;

  }



  ScanKey();            //scan key

  if ( digitalRead(TRIGGER_PIN) == LOW) {wm.resetSettings();ESP.restart();}

}



void ScanKey()            

{

  for(int i=0;i<=7;i++)

  {

    if(pcf8574_I1.digitalRead(i) == LOW)         //key pressed

      {

        delay(20);                        

        if(pcf8574_I1.digitalRead(i) == LOW)       //key pressed again

        {

          pcf8574_R1.digitalWrite(i,!pcf8574_R1.digitalRead(i));    // toggle relay1 state     

          while(pcf8574_I1.digitalRead(i) == LOW); //wait remove hand

          if (pcf8574_R1.digitalRead(i) == LOW) relaystate[i+1]="on";else relaystate[i+1]="off";

        }

      } 

  }



}