Arnov Sharma
Published © MIT

Home Automation Board with NODEMCU Six Outputs

A NODEMCU based home automation board with six relays and an onboard AC SMPS for powering the device directly from an AC source.

BeginnerFull instructions provided1 hour678
Home Automation Board with NODEMCU Six Outputs

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1
PCBWay Custom PCB
PCBWay Custom PCB
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

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Schematics

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sch wiring

Code

Test Sketch- chaser sketch

C/C++
int pinsCount=13;                        // declaring the integer variable pinsCount
int pins[] = {16,5,4,0,2,14,12,13,15,3,1};          // declaring the array pins[]


void setup() {
  pinMode(16, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(0, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(1, OUTPUT);
//  pinMode(8, OUTPUT);
                    
}

 
void loop() {
  for (int i=0; i<pinsCount; i=i+1){    // chasing right
    digitalWrite(pins[i], HIGH);         // switching the LED at index i on
    delay(500);                          // stopping the program for 100 milliseconds
    digitalWrite(pins[i], LOW);          // switching the LED at index i off
  }
  for (int i=pinsCount-1; i>0; i=i-1){   // chasing left (except the outer leds)
    digitalWrite(pins[i], HIGH);         // switching the LED at index i on
    delay(500);                          // stopping the program for 100 milliseconds
    digitalWrite(pins[i], LOW);          // switching the LED at index i off
  }

}

HOME AUTOMATION

C/C++
#include <ESP8266WiFi.h>

// Webserver Config
const char *ssid = "YOUR SSID";
const char *password = "YOUR PASS";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Auxiliar variables to store the current output state
String output1State = "off";
String output2State = "off";
String output3State = "off";
String output4State = "off";
String output5State = "off";
String output6State = "off";


// Assign output variables to GPIO pins
const int output1 = 16; //D0
const int output2 = 5;  //D1
const int output3 = 4;  //D2
const int output4 = 0;  //D3
const int output5 = 2;  //D4
const int output6 = 14;  //D5

void setup() {
  Serial.begin(115200);
  // Initialize the output variables as outputs
  pinMode(output1, OUTPUT);
  pinMode(output2, OUTPUT);
  pinMode(output3, OUTPUT);
  pinMode(output4, OUTPUT);
  pinMode(output5, OUTPUT);
  pinMode(output6, OUTPUT);  
 
  // Set outputs to HIGH
  digitalWrite(output1, HIGH);
  digitalWrite(output2, HIGH);
  digitalWrite(output3, HIGH);
  digitalWrite(output4, HIGH);
  digitalWrite(output5, HIGH);
  digitalWrite(output6, HIGH);  
  
  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // 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
    while (client.connected()) {            // loop while the client's connected
      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 the GPIOs on and off
            if (header.indexOf("GET /1/on") >= 0) {         //LOAD1
              Serial.println("LOAD1 on");
              output1State = "on";
              digitalWrite(output1, LOW);
            } else if (header.indexOf("GET /1/off") >= 0) {
              Serial.println("LOAD1 off");
              output1State = "off";
              digitalWrite(output1, HIGH);
            } else if (header.indexOf("GET /2/on") >= 0) {  //LOAD2
              Serial.println("LOAD2 on");
              output2State = "on";
              digitalWrite(output2, LOW);
            } else if (header.indexOf("GET /2/off") >= 0) {
              Serial.println("LOAD2 off");
              output2State = "off";
              digitalWrite(output2, HIGH);
            } else if (header.indexOf("GET /3/on") >= 0) {  //LOAD3
              Serial.println("LOAD3 on");
              output3State = "on";
              digitalWrite(output3, LOW);
            } else if (header.indexOf("GET /3/off") >= 0) {
              Serial.println("LOAD3 off");
              output3State = "off";
              digitalWrite(output3, HIGH);
            } else if (header.indexOf("GET /4/on") >= 0) {   //LOAD4
              Serial.println("LOAD4 on");
              output4State = "on";
              digitalWrite(output4, LOW);
            } else if (header.indexOf("GET /4/off") >= 0) {
              Serial.println("LOAD4 off");
              output4State = "off";
              digitalWrite(output4, HIGH);
            } else if (header.indexOf("GET /5/on") >= 0) {   //LOAD5
              Serial.println("LOAD5 on");
              output5State = "on";
              digitalWrite(output5, LOW);
            } else if (header.indexOf("GET /5/off") >= 0) {
              Serial.println("LOAD5 off");
              output5State = "off";
              digitalWrite(output5, HIGH);
            } else if (header.indexOf("GET /6/on") >= 0) {   //LOAD6
              Serial.println("LOAD6 on");
              output6State = "on";
              digitalWrite(output6, LOW);
            } else if (header.indexOf("GET /6/off") >= 0) {
              Serial.println("LOAD6 off");
              output6State = "off";
              digitalWrite(output6, 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:,\">");
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println(".button { background-color: #6a195b; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #a82890;}</style></head>");
            
            // Web Page Heading
            client.println("<body><h1>HOME AUTOMATION BASIC</h1>");
            
            // Display current state, and ON/OFF buttons for OUTPUT1 
            client.println("<p>LOAD1 - State " + output1State + "</p>");
           
            // If the output1State is off, it displays the ON button       
            if (output1State=="off") {
              client.println("<p><a href=\"/1/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/1/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 
               
            // Display current state, and ON/OFF buttons for OUTPUT2 
            client.println("<p>LOAD2 - State " + output2State + "</p>");
            
            // If the output2State is off, it displays the ON button       
            if (output2State=="off") {
              client.println("<p><a href=\"/2/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/2/off\"><button class=\"button button2\">OFF</button></a></p>");
            }

         
           // Display current state, and ON/OFF buttons for OUTPUT3                  
            client.println("<p>LOAD3 - State " + output3State + "</p>");
           
         
           // If the output3State is off, it displays the ON button       
            if (output3State=="off") {
              client.println("<p><a href=\"/3/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/3/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

           // Display current state, and ON/OFF buttons for OUTPUT4                  
            client.println("<p>LOAD4 - State " + output4State + "</p>");
           
         
           // If the output4State is off, it displays the ON button       
            if (output4State=="off") {
              client.println("<p><a href=\"/4/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/4/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

            // Display current state, and ON/OFF buttons for OUTPUT5                  
            client.println("<p>LOAD5 - State " + output5State + "</p>");
           
         
           // If the output5State is off, it displays the ON button       
            if (output5State=="off") {
              client.println("<p><a href=\"/5/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/5/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

            // Display current state, and ON/OFF buttons for OUTPUT6                               
            client.println("<p>LOAD6 - State " + output6State + "</p>");
           
         
           // If the output6State is off, it displays the ON button       
            if (output6State=="off") {
              client.println("<p><a href=\"/6/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/6/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

              
            client.println("</body></html>");
            
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            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("");
  }
}

Credits

Arnov Sharma

Arnov Sharma

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