ESP8266 LED Control via Python

This project demonstrates how to control the built-in LED on an ESP8266 module based on a condition evaluated in a Python program. The ESP8266 acts as a web server that listens for HTTP requests to turn the LED on or off.

Project Overview

• ESP8266 Code: Sets up a web server to control the built-in LED based on HTTP GET requests.
• Python Program: Sends HTTP requests to the ESP8266 to control the LED based on a condition.

Components

• ESP8266 module (e.g., NodeMCU, Wemos D1 Mini)
• Python 3.x
• Wi-Fi network

Requirements

Hardware

• ESP8266 module
• USB-to-serial adapter (if needed)

Software

• Arduino IDE
• Python 3.x
• requests library for Python

Libraries

• For ESP8266 (Arduino IDE):

  • ESP8266WiFi.h

• For Python:

  • requests

Setup

ESP8266 Code

1. Install Arduino IDE: If not already installed, download and install the Arduino IDE.

2. Install ESP8266 Board: Add ESP8266 support to Arduino IDE:

   • Go to File -> Preferences
   • Add http://arduino.esp8266.com/stable/package_esp8266com_index.json to the "Additional Boards Manager URLs" field
   • Go to Tools -> Board -> Boards Manager
   • Search for ESP8266 and install the latest version

3. Upload Code to ESP8266:

   • Open the esp8266_led_control.ino file in Arduino IDE
   • Replace Your_SSID and Your_PASSWORD with your Wi-Fi credentials
   • Select your ESP8266 board and port from the Tools menu
   • Click on Upload to upload the code

   #include <ESP8266WiFi.h>
   
   const char* ssid = "Your_SSID";
   const char* password = "Your_PASSWORD";
   
   WiFiServer server(80);
   
   void setup() {
     Serial.begin(115200);
     pinMode(LED_BUILTIN, OUTPUT);
   
     WiFi.begin(ssid, password);
     while (WiFi.status() != WL_CONNECTED) {
       delay(1000);
       Serial.println("Connecting to WiFi...");
     }
     Serial.println("Connected to WiFi");
   
     server.begin();
     Serial.println("Server started");
     Serial.println(WiFi.localIP());
   }
   
   void loop() {
     WiFiClient client = server.available();
     if (client) {
       Serial.println("New Client Connected");
       String request = client.readStringUntil('\r');
       Serial.println(request);
       client.flush();
   
       if (request.indexOf("GET /1") != -1) {
         digitalWrite(LED_BUILTIN, LOW);
       } else if (request.indexOf("GET /0") != -1) {
         digitalWrite(LED_BUILTIN, HIGH);
       }
   
       client.print("HTTP/1.1 200 OK\r\n");
       client.print("Content-Type: text/html\r\n");
       client.print("\r\n");
       client.print("LED state updated");
       client.stop();
       Serial.println("Client Disconnected");
     }
   }