#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
// Create web server object on port 80
ESP8266WebServer server(80);
// ===== Pin Definitions =====
// NodeMCU pins
const int PWM_PIN = 5; // PWM output (D1)
const int LED_PIN = 16; // LED output (D0)
// ===== WiFi Credentials =====
const char* ssid = "yy";
const char* password = "yasin739314";
// ===== Network Configuration (Static IP) =====
IPAddress local_IP(192, 168, 0, 184);
IPAddress gateway(192, 168, 0, 1);
IPAddress subnet(255, 255, 255, 0);
// ===== Function Prototypes =====
void handleRoot();
void handleON();
void handleOFF();
void setup() {
Serial.begin(115200);
/*
// Configure static IP
if (WiFi.config(local_IP, gateway, subnet)) {
Serial.println("Static IP configured successfully");
} else {
Serial.println("Failed to configure Static IP");
}
*/
// Set pin modes
pinMode(LED_PIN, OUTPUT);
pinMode(PWM_PIN, OUTPUT);
// Initialize PWM with 0 (off)
analogWrite(PWM_PIN, 0);
// Connect to WiFi
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.print("Connecting to WiFi");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println("\nConnected!");
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
// ===== Web Server Routes =====
server.on("/", HTTP_GET, handleRoot); // Main endpoint
server.on("/ON", handleON); // Turn LED ON
server.on("/OFF", handleOFF); // Turn LED OFF
// Start server
server.begin();
Serial.println("HTTP server started");
}
// ===== Root Handler =====
// Example: http://192.168.0.184/?data=5
void handleRoot() {
String message = "Hello from ESP8266";
// Check if URL contains "data" parameter
if (server.hasArg("data")) {
String data = server.arg("data");
message = "Received value: " + data;
// Convert received value to integer
int value = data.toInt();
// Scale value for PWM (0–1023 range for ESP8266)
int pwmValue = value * 100;
// Apply PWM to main pin
analogWrite(PWM_PIN, pwmValue);
// Debug output
Serial.print("PWM Value: ");
Serial.println(pwmValue);
// Optional: apply to other pins (be careful with valid pins)
analogWrite(0, pwmValue * 2);
analogWrite(2, pwmValue * 5);
analogWrite(3, pwmValue * 10);
}
// Send HTTP response
server.send(200, "text/plain", message);
}
// ===== LED ON =====
void handleON() {
digitalWrite(LED_PIN, HIGH);
Serial.println("LED ON");
server.send(200, "text/plain", "LED is ON");
}
// ===== LED OFF =====
void handleOFF() {
digitalWrite(LED_PIN, LOW);
Serial.println("LED OFF");
server.send(200, "text/plain", "LED is OFF");
}
// ===== Main Loop =====
void loop() {
// Handle incoming client requests
server.handleClient();
}
