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간단한 예제....
결국 많은 라이브러리 제대로 동작되지 않아, AT명령으로만 구성.
필요한 소스는 다른 라이브러리를 참조해서 작성해야 할 듯....
- AT명령 참조할 것. https://room-15.github.io/blog/2015/03/26/esp8266-at-command-reference/
- 아두이노 보드와 SoftwareSerial 해서 ESP8266 를 통해 wifi는 느리므로, ESP8266 으로 Server 구성해볼 것.
. 아두이노 UNO보드를 이용해서 ESP826 칩으로 업로드하려면, atmega328p 칩을 제거해야함.
#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
unsigned int count = 0;
void setup() {
Serial.begin(9600);
esp8266.begin(9600); // your esp's baud rate might be different
Serial.println("");
Serial.println("ESP8266 ESP-01 module");
Serial.println("");
sendData("AT+RST\r\n",2000,DEBUG); // reset module
sendData("AT+CWMODE=1\r\n",1000,DEBUG); // configure as access point
sendData("AT+CWJAP=\"U+Net5B6F\",\"1000019118\"\r\n", 5000, DEBUG);
sendData("AT+CIFSR\r\n",1000,DEBUG); // get ip address
//sendData("AT+CWSAP=\"esp8266_j2h\",\"12345678\",5,3\r\n",1000,DEBUG); // ap모드
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
{
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 response = "";
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 && response.length() > 0) {
Serial.println("\r\n------------------ response start");
Serial.println(response);
Serial.println("------------------ response end");
}
String webpage = "";
//webpage = "HTTP/1.1 200 OK\r\n"; // 크롬, IE는 해더로 인식하나, ios에서 인식 안함.
//webpage += "Content-Type: text/html\r\n";
//webpage += "Connection: close\r\n";
//webpage += "Refresh: 10\r\n";
//webpage += "\r\n";
webpage += "<!DOCTYPE HTML>\r\n";
webpage += "<html><body>\r\n";
webpage += "<h1>Hello</h1><h2>World! " + String(count++) + "</h2><button>LED1</button><button>LED2</button>\r\n";
webpage += "</body></html>\r\n";
String cipSend = "AT+CIPSEND=";
cipSend += connectionId;
cipSend += ",";
cipSend +=webpage.length();
cipSend +="\r\n";
sendData(cipSend,1000,DEBUG); // cipsend - maxlength 2048
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.println(command); // send the read character to the esp8266
long int time = millis();
delay(20);
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 && response.length() > 0) {
Serial.println("\r\n------------------ response start");
Serial.println(response);
Serial.println("------------------ response end");
}
return response;
}
void clear() {
while (esp8266.read() != -1) {}
}728x90
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