ESP32 2LED Web_Server
/*********
Rui Santos
Complete project details at http://randomnerdtutorials.com
*********/
// Load Wi-Fi library
#include <WiFi.h>
// Replace with your network credentials
const char* ssid = " ";
const char* password = " ";
// 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 output26State = "off";
String output27State = "off";
// Assign output variables to GPIO pins
const int output26 = 26;
const int output27 = 27;
void setup() {
Serial.begin(115200);
// Initialize the output variables as outputs
pinMode(output26, OUTPUT);
pinMode(output27, OUTPUT);
// Set outputs to LOW
digitalWrite(output26, LOW);
digitalWrite(output27, LOW);
// 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 /26/on") >= 0) {
Serial.println("GPIO 26 on");
output26State = "on";
digitalWrite(output26, HIGH);
} else if (header.indexOf("GET /26/off") >= 0) {
Serial.println("GPIO 26 off");
output26State = "off";
digitalWrite(output26, LOW);
} else if (header.indexOf("GET /27/on") >= 0) {
Serial.println("GPIO 27 on");
output27State = "on";
digitalWrite(output27, HIGH);
} else if (header.indexOf("GET /27/off") >= 0) {
Serial.println("GPIO 27 off");
output27State = "off";
digitalWrite(output27, LOW);
}
// 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; margin: 0px auto; text-align: center;}");
client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
client.println(".button2 {background-color: #555555;}</style></head>");
// Web Page Heading
client.println("<body><h1>ESP32 Web Server</h1>");
// Display current state, and ON/OFF buttons for GPIO 26
client.println("<p>GPIO 26 - State " + output26State + "</p>");
// If the output26State is off, it displays the ON button
if (output26State=="off") {
client.println("<p><a href=\"/26/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/26/off\"><button class=\"button button2\">OFF</button></a></p>");
}
// Display current state, and ON/OFF buttons for GPIO 27
client.println("<p>GPIO 27 - State " + output27State + "</p>");
// If the output27State is off, it displays the ON button
if (output27State=="off") {
client.println("<p><a href=\"/27/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/27/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("");
}
}
========================================
Node-red json File
========================================
[{"id":"87829af0.b5a588","type":"http request","z":"cf6a2f8.eda6dd","name":"","method":"GET","ret":"txt","url":"http://192.168.43.86/","tls":"","x":130,"y":100,"wires":[["4ccf532f.7c98ac"]]},{"id":"79ce4d9a.2bcb84","type":"inject","z":"cf6a2f8.eda6dd","name":"","topic":"","payload":"","payloadType":"date","repeat":"2.5","crontab":"","once":false,"onceDelay":0.1,"x":170,"y":360,"wires":[["87829af0.b5a588"]]},{"id":"4ccf532f.7c98ac","type":"switch","z":"cf6a2f8.eda6dd","name":"","property":"payload","propertyType":"msg","rules":[{"t":"cont","v":"/26/on","vt":"str"},{"t":"cont","v":"/26/off","vt":"str"},{"t":"cont","v":"/27/on","vt":"str"},{"t":"cont","v":"/27/off","vt":"str"}],"checkall":"true","repair":false,"outputs":4,"x":270,"y":100,"wires":[["f0990323.29f23"],["177b98cc.5db7f7"],["5491eae1.d47c94"],["25fc368.80e7dca"]]},{"id":"f973b427.7b9228","type":"debug","z":"cf6a2f8.eda6dd","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":730,"y":100,"wires":[]},{"id":"f0990323.29f23","type":"function","z":"cf6a2f8.eda6dd","name":"P26 ON","func":"msg.payload =\"P26 ON\";\nreturn msg;\n","outputs":1,"noerr":0,"x":420,"y":40,"wires":[["f973b427.7b9228","3dec28ca.f97b98"]]},{"id":"177b98cc.5db7f7","type":"function","z":"cf6a2f8.eda6dd","name":"P26 OFF","func":"msg.payload =\"P26 OFF\";\nreturn msg;\n","outputs":1,"noerr":0,"x":420,"y":80,"wires":[["f973b427.7b9228","3dec28ca.f97b98"]]},{"id":"5491eae1.d47c94","type":"function","z":"cf6a2f8.eda6dd","name":"P27 ON","func":"msg.payload =\"P27 ON\";\nreturn msg;\n","outputs":1,"noerr":0,"x":420,"y":120,"wires":[["f973b427.7b9228","c297311a.d7d05"]]},{"id":"25fc368.80e7dca","type":"function","z":"cf6a2f8.eda6dd","name":"P27 OFF","func":"msg.payload =\"P27 OFF\";\nreturn msg;\n","outputs":1,"noerr":0,"x":420,"y":160,"wires":[["f973b427.7b9228","c297311a.d7d05"]]},{"id":"3dec28ca.f97b98","type":"function","z":"cf6a2f8.eda6dd","name":"Set Color","func":"if (msg.payload === \"P26 ON\")\n msg.color =\"lime\";\nelse\n// if (msg.payload === \"P26 OFF\")\n msg.color =\"red\";\n\n\n\nreturn msg;","outputs":1,"noerr":0,"x":660,"y":180,"wires":[["fe9fe612.ac62a8","2001aacc.9a8c26"]]},{"id":"fe9fe612.ac62a8","type":"ui_text","z":"cf6a2f8.eda6dd","group":"cfe942ae.4006","order":3,"width":"2","height":"2","name":"","label":"ESP32 LED-1","format":"<font color={{msg.color}} ><i class=\"fa fa-circle\" style=\"font-size:24px;\"></i></font> ","layout":"row-center","x":840,"y":180,"wires":[]},{"id":"c297311a.d7d05","type":"function","z":"cf6a2f8.eda6dd","name":"Set Color","func":"\nif (msg.payload === \"P27 ON\")\n msg.color =\"blue\";\nelse \n//if (msg.payload === \"P27 OFF\")\n msg.color =\"yallow\";\n\nreturn msg;","outputs":1,"noerr":0,"x":660,"y":280,"wires":[["7f67e119.cfdab","3d43382c.3fd738"]]},{"id":"7f67e119.cfdab","type":"ui_text","z":"cf6a2f8.eda6dd","group":"cfe942ae.4006","order":3,"width":"2","height":"2","name":"","label":"ESP32 LED-2","format":"<font color={{msg.color}} ><i class=\"fa fa-circle\" style=\"font-size:24px;\"></i></font> ","layout":"row-center","x":840,"y":280,"wires":[]},{"id":"2001aacc.9a8c26","type":"ui_text","z":"cf6a2f8.eda6dd","group":"cfe942ae.4006","order":0,"width":"3","height":"3","name":"LED Message","label":"Arduino Reading","format":"{{msg.payload}}","layout":"col-center","x":840,"y":220,"wires":[]},{"id":"3d43382c.3fd738","type":"ui_text","z":"cf6a2f8.eda6dd","group":"cfe942ae.4006","order":0,"width":"3","height":"3","name":"LED Message","label":"Arduino Reading","format":"{{msg.payload}}","layout":"col-center","x":840,"y":320,"wires":[]},{"id":"cfe942ae.4006","type":"ui_group","z":"","name":"ESP32 2LED","tab":"ba052423.3729f8","disp":true,"width":"6","collapse":false},{"id":"ba052423.3729f8","type":"ui_tab","z":"","name":"alex9ufoBMP280","icon":"dashboard","order":1}]
