RAGUL M 1560912Anshul Shajijoshua johnsonC P ADARSH
Published © CC0

Comptroller Box: IoT Based Smart Switchboard

Primarily a possible approach of a smart switchboard to control/operate any traditional electrical gadgets remotely using a web application.

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Comptroller Box: IoT Based Smart Switchboard

Things used in this project

Hardware components

WIZ750SR
WIZnet WIZ750SR
×1
Arduino UNO
Arduino UNO
×1
WIZwiki-W7500
WIZnet WIZwiki-W7500
×1
General Purpose Dual Op-Amp
Texas Instruments General Purpose Dual Op-Amp
×1
Resistor 10k ohm
Resistor 10k ohm
×2
DHT11 Temperature & Humidity Sensor (4 pins)
DHT11 Temperature & Humidity Sensor (4 pins)
×1
Relay (generic)
×4
Transformer
×1
Inverter
×1
Multipin plug board
×1
Temperature Sensor
Temperature Sensor
×1
network router
×1
Digital display board
×1

Software apps and online services

Mbed OS
ThingSpeak API
ThingSpeak API

Story

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Schematics

WIZ750SR CONNECTION TO ARDUINO UNO

Comptroller and WIZ Boards connection

Workflow

Code

Connecting the database with Arduino:

PHP
<?php
   
    $dbusername = "arduino"; 
    
    $dbpassword = "arduinotest";
    
    $server = "localhost"; 

    $dbconnect = mysql_pconnect($server, $dbusername, $dbpassword);
    $dbselect = mysql_select_db("test",$dbconnect);

    $sql = "INSERT INTO test.sensor (value) VALUES ('".$_GET["value"]."')";    

    mysql_query($sql);

?>

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
 
// Enter the IP address for Arduino, as mentioned we will use 192.168.0.16
// Be careful to use , insetead of . when you enter the address here
IPAddress ip(192,168,0,16);

int photocellPin = 0;  // Analog input pin on Arduino we connected the SIG pin from sensor
int photocellReading;  // Here we will place our reading

char server[] = "192.168.0.11"; // IMPORTANT: As we are using XAMPP we had to find out the IP address of the computer and put it here.

// Initialize the Ethernet server library
EthernetClient client;

void setup() {
 
  // Serial.begin starts the serial connection between computer and Arduino
  Serial.begin(9600);
 
  // start the Ethernet connection
  Ethernet.begin(mac, ip);
    
}

void loop() {
 
  photocellReading = analogRead(photocellPin); // Fill the sensorReading with the information from sensor
 
  // Connect to the server (your computer or web page)  
  if (client.connect(server, 80)) {
    client.print("GET /write_data.php?"); // This
    client.print("value="); // This
    client.print(photocellReading); // And this is what we did in the testing section above. We are making a GET request just like we would from our browser but now with live data from the sensor
    client.println(" HTTP/1.1"); // Part of the GET request
    client.println("Host: 192.168.0.11"); // IMPORTANT: As we are using XAMPP we had to find out the IP address of the computer and put it here.
    client.println("Connection: close"); // Part of the GET request telling the server that we are over transmitting the message
    client.println(); // Empty line
    client.println(); // Empty line
    client.stop();    // Closing connection to server

  }

  else {
    // If Arduino can't connect to the server (your computer or web page)
    Serial.println("--> connection failed\n");
  }
 
  // the server is given some time to receive the data and store it say 10 seconds. Be advised when delaying. Using a short delay might lead the server unable to capture data because of Arduino transmitting new data too soon.
  delay(10000);
}

LED operations

PHP
<?php
$onoroff = $_GET["state"];
$textfile = "LEDstate.txt"; 
 
$fileLocation = "$textfile";
$fh = fopen($fileLocation, 'w   ') or die("Something went wrong!"); 

$stringToWrite = "$onoroff"; 
fwrite($fh, $stringToWrite); 
fclose($fh); 
 
header("Location: index.html");
?>

Wiz750SR Connectivity Source Code

C/C++
#include "mbed.h"
#include "EthernetInterface.h"
#include "Adafruit_SSD1306.h"
#include "HTTPClient.h"


#if defined(TARGET_WIZWIKI_W7500)||defined(TARGET_WIZWIKI_W7500P)
    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x53, 0xAE, 0x90};
#endif
Serial pc(USBTX, USBRX);
Serial device(D1,D0);
EthernetInterface eth;

// Declare TCP Connection Class
TCPSocketConnection sock;

int main() {
   int val;
   int i=0;
   char c;
   
char D[1000];
   
   int phy_link;
    printf("Wait a second...\r\n");

   eth.init(mac_addr);     //Use DHCP

printf("Check Ethernet Link\r\n");
    /*while(1) //Wait link up
    {
        if(eth.link() == true) 
            break;
    }*/
    printf("Link up\r\n");

    eth.connect();
    
      printf("IP Address is %s\r\n\r\n", eth.getIPAddress());
        printf("MASK Address is %s\r\n\r\n", eth.getNetworkMask());
        printf("GATEWAY Address is %s\r\n\r\n", eth.getGateway());
        printf("MAC Address is %s\r\n\r\n", eth.getMACAddress());
        while(1){
             while(device.readable())
        {   
        
            D[i]=device.getc();
           // char c= device.getc();
            pc.printf("%c",D[i]);
            c = D[i];
            i++;
            
            
        }
        val = int(c - 48);
        //printf("%d",val);
        // TCP socket connect to openweather server 
        //TCPSocketConnection sock;
        char send_data[1024];
        int CDS_data=val;
        sock.connect("api.thingspeak.com", 80);
        
         sprintf(send_data, "GET https://api.thingspeak.com/update?api_key=WO0QPMWOHQ7HTZMM&field1=%d HTTP/1.0\n\n",CDS_data);
        // GET method, to request weather forecast  
       // char http_cmd[] = "GET /update?api_key=0Q8S3KCULT7GUDVR&field1=2000 HTTP/1.0\n\n";
        
           
        sock.send_all(send_data, sizeof(send_data)-1);
        
        // get data into buffer
        char buffer[2048];
        int ret;
        while (true) {
            ret = sock.receive(buffer, sizeof(buffer)-1);
            if (ret <= 0)
                break;
            buffer[ret] = '\0';
            printf("Received %d chars from server: %s\n", ret, buffer);     
        }
        printf("\r\n\r\n");
      }
}

WIZwiki-W7500 Source Code

C/C++
#include "mbed.h"
#include "EthernetInterface.h"
#include "FsHandler.h"
#include "HTTPServer.h"
#include "SDFileSystem.h"
#include "SoftwareSerial.h"


SoftwareSerial mySerial(10,11);//RX, TX

#if defined(TARGET_WIZWIKI_W7500)||defined(TARGET_WIZWIKI_W7500P)
    //Choose one of file system.
    SDFileSystem local(SD_MOSI, SD_MISO, SD_CLK, SD_SEL, "local");//PB_3, PB_2, PB_1, PB_0
    //LocalFileSystem local("local");
#endif

#if defined(TARGET_WIZWIKI_W7500)||defined(TARGET_WIZWIKI_W7500P)
    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0xFF, 0xFF, 0x02};
#endif

// Declare Ethernet Class
EthernetInterface eth;

// Declare HTTP Server Class
HTTPServer  svr;

// Set Server Network
char ip_addr[] = "169.254.80.156";
char subnet_mask[] = "255.255.255.0";
char gateway_addr[] = "192.168.240.1";


int main()
{
    HTTPFsRequestHandler::mount_eth(&eth);
    HTTPFsRequestHandler::mount("/local/", "/");
    svr.addHandler<HTTPFsRequestHandler>("/");

#if defined(TARGET_WIZWIKI_W7500)||defined(TARGET_WIZWIKI_W7500P)
    
    #ifdef DHCP
        eth.init(mac_addr); //Use DHCP
    #else
        eth.init(mac_addr, ip_addr, subnet_mask, gateway_addr); //Not Use DHCP
    #endif

#else

    #ifdef DHCP
        eth.init(); //Use DHCP
    #else
        eth.init(ip_addr, subnet_mask, gateway_addr); //Not Use DHCP
    #endif

#endif

    printf("Check Ethernet Link\r\n");
    while(1) //Wait link up
    {
        if(eth.link() == true) 
            break;
    }
    printf("Link up\r\n");

    eth.connect();
    printf("Server IP Address is %s\r\n", eth.getIPAddress());

    if (!svr.start(80, &eth)) {

        error("Server not starting !");
        exit(0);
    }

    while(1) {
        svr.poll();
    }
    
}

Credits

Anshul Shaji

Posted by RAGUL M 1560912
Thanks to Anshul K Shaji, Ragul M Gayathri, Joshua Johnson Abraham, C P Adarsh, and Akhil Biju.

Comments

Related channels and tags
  • Arduino
  • Home Automation
  • ThingSpeak
  • WIZnet