Embedded Files
Link for App: https://drive.google.com/file/d/1GWFTJQSAqDL8-QV0iYk5qzVKKLbVSwAR/view?usp=sharing
Required:
- NodeMCU
- Relay Module 8 Channel (5 Volt Relay)
- 5 Volt Power supply
Code:
#include <ESP8266WiFi.h>
const char* ssid = "YOUR SSID "; // SSID i.e. Service Set Identifier is the name of your WIFI
const char* password = "YOUR PASSWORD"; // Your Wifi password, in case you have open network comment the whole statement.
int R1 = D1; // GPIO13 or for NodeMCU you can directly write D7
int R2 = D2;
int R3 = D3;
int R4 = D4;
int R5 = D5;
int R6 = D6;
int R7 = D7;
int R8 = D8;
WiFiServer server(80); // Creates a server that listens for incoming connections on the specified port, here in this case port is 80.
void setup() {
Serial.begin(115200);
delay(10);
pinMode(R1, OUTPUT);
pinMode(R2, OUTPUT);
pinMode(R3, OUTPUT);
pinMode(R4, OUTPUT);
pinMode(R5, OUTPUT);
pinMode(R6, OUTPUT);
pinMode(R7, OUTPUT);
pinMode(R8, OUTPUT);
digitalWrite(R1, HIGH);
digitalWrite(R2, HIGH);
digitalWrite(R3, HIGH);
digitalWrite(R4, HIGH);
digitalWrite(R5, HIGH);
digitalWrite(R6, HIGH);
digitalWrite(R7, HIGH);
digitalWrite(R8, HIGH);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP()); //Gets the WiFi shield's IP address and Print the IP address of serial monitor
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while (!client.available()) {
delay(1);
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Match the request
if (request.indexOf("/Relay1On") != -1)
{
digitalWrite(R1, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 1 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay1Off") != -1) {
digitalWrite(R1, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 1 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay2On") != -1) {
digitalWrite(R2, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 2 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay2Off") != -1) {
digitalWrite(R2, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 2 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay3On") != -1) {
digitalWrite(R3, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 3 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay3Off") != -1) {
digitalWrite(R3, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 3 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay4On") != -1) {
digitalWrite(R4, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 4 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay4Off") != -1) {
digitalWrite(R4, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 4 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay5On") != -1) {
digitalWrite(R5, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 5 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay5Off") != -1) {
digitalWrite(R5, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 5 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay6On") != -1) {
digitalWrite(R6, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 6 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay6Off") != -1) {
digitalWrite(R6, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 6 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay7On") != -1) {
digitalWrite(R7, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 7 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay7Off") != -1) {
digitalWrite(R7, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 7 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay8On") != -1) {
digitalWrite(R8, LOW);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 8 is ON");
client.println("</html>");
client.stop();
delay(1);
}
if (request.indexOf("/Relay8Off") != -1) {
digitalWrite(R8, HIGH);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Relay 8 is OFF");
client.println("</html>");
client.stop();
delay(1);
}
}
connection diagram
NodeMCU PIN
D1=RELAY1
D2=RELAY2
D3=RELAY3
D4=RELAY4
D5=RELAY5
D6=RELAY6
D7=RELAY7
D8=RELAY8
VCC=5 VOLT
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