Video Tutorial: How The Code Works
The video below shows you how the ESP8266 works as a webserver with the Arduino using the code below.
Arduino Webserver Code/Sketch For ESP8266
The code handles the ESP8266’s initialization in the setup() function: it resets the module, configures it as an access point, prints out the module’s ip address, configures for multiple connections, configures as a server on port 80.
When there is data available if the string +IPD is in the serial data then the HTTP response is sent to the browser or device requesting it.
#include <SoftwareSerial.h> #define DEBUG true SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make TX Arduino line is pin 3. // This means that you need to connect the TX line from the esp to the Arduino's pin 2 // and the RX line from the esp to the Arduino's pin 3 void setup() { Serial.begin(9600); esp8266.begin(9600); // your esp's baud rate might be different sendData("AT+RST\r\n",2000,DEBUG); // reset module sendData("AT+CWMODE=2\r\n",1000,DEBUG); // configure as access point sendData("AT+CIFSR\r\n",1000,DEBUG); // get ip address sendData("AT+CIPMUX=1\r\n",1000,DEBUG); // configure for multiple connections sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // turn on server on port 80 } void loop() { if(esp8266.available()) // check if the esp is sending a message { /* while(esp8266.available()) { // The esp has data so display its output to the serial window char c = esp8266.read(); // read the next character. Serial.write(c); } */ if(esp8266.find("+IPD,")) { delay(1000); int connectionId = esp8266.read()-48; // subtract 48 because the read() function returns // the ASCII decimal value and 0 (the first decimal number) starts at 48 String webpage = "<h1>Hello</h1><h2>World!</h2><button>LED1</button>"; String cipSend = "AT+CIPSEND="; cipSend += connectionId; cipSend += ","; cipSend +=webpage.length(); cipSend +="\r\n"; sendData(cipsend,1000,DEBUG); sendData(webpage,1000,DEBUG); webpage="<button>LED2</button>"; cipSend = "AT+CIPSEND="; cipSend += connectionId; cipSend += ","; cipSend +=webpage.length(); cipSend +="\r\n"; sendData(cipsend,1000,DEBUG); sendData(webpage,1000,DEBUG); String closeCommand = "AT+CIPCLOSE="; closeCommand+=connectionId; // append connection id closeCommand+="\r\n"; sendData(closeCommand,3000,DEBUG); } } } String sendData(String command, const int timeout, boolean debug) { String response = ""; esp8266.print(command); // send the read character to the esp8266 long int time = millis(); while( (time+timeout) > millis()) { while(esp8266.available()) { // The esp has data so display its output to the serial window char c = esp8266.read(); // read the next character. response+=c; } } if(debug) { Serial.print(response); } return response; }