ESP8266 - AP mode로 LED 원격제어

ESP-01에 부착된 LED를

원격으로 접속해서

온 오프 하기 ...

WiFi에 접속하기

작동하는 웹 페이지

버튼을 누르면 LED가 제어된다

ESP8266을 SoftAP로 작동시키면 

접속주소는 주로 192.168.4.1 임

// ============================================================================================
// AP mode : ESP가 서버가 되어 고유IP 갖는다. 다른 기기에서 라우터 거치지 않고 직접 연결
// ============================================================================================
// 참조 사이트
// http://circuits4you.com/2016/12/16/esp8266-web-server-ap/
// https://circuits4you.com/2016/05/19/iot-based-home-automation-project/
// https://circuits4you.com/2018/02/05/esp8266-arduino-wifi-web-server-led-on-off-control/
// https://blog.naver.com/twophase/220709172472
// ============================================================================================
#include 
#include 
#include 
#include "HomePage.h"
// ============================================================================================
//SSID and Password to your ESP Access Point
const char* ssid = "ESPWebServer";  // WiFI 목록에 나타나는 이름
const char* password = "12345678";
const int LED_PIN = 2;                    // LED of ESP-01 connect at GPIO 2
String StatusLED, Temperature, Humidity;
// ============================================================================================
ESP8266WebServer server(80);            // Server on port 80
// ============================================================================================
//     This rutine is exicuted when you open its IP in browser
// ============================================================================================
void FunctionRoot() {
  String s = MAIN_page;    
  Temperature = digitalRead(0);             // nothing connected, just dumy
  Humidity = analogRead(A0);                // ditto
  s.replace("@@TEMP@@", Temperature);       // only update at Home reflash
  s.replace("@@HUMID@@", Humidity);
  s.replace("@@LED@@", StatusLED);
  server.send(200, "text/html", s);      
  Serial.println("Home page refreshed");
}
// ============================================================================================
// The TEXTs should be matched to those what in 'HomePage.h' !!!!
// ============================================================================================
void FunctionForm() {                       // Handle Set Date/Time Settings
  String t_state = server.arg("submit");
  // Temperature = String(t);               // it is already set in 'displayTempHumid'
  if(t_state=="LED ON") {                   // Change Load-1 State as per request
    StatusLED="LED ON";    
    digitalWrite(LED_PIN, LOW);             // IR to (built in BLUE LED) TxD = GPIO 1
    Serial.println("LED ON");
  }
  if(t_state=="LED OFF") {
    StatusLED="LED OFF";    
    digitalWrite(LED_PIN, HIGH);           
    Serial.println("LED Off");
  }
  server.sendHeader("Location", "/");       // This Line Keeps It on Same Page
  server.send(302, "text/plain", "Updated -- Press Back Button");  
  delay(100);
}
// ============================================================================================
void setup(void){
  Serial.begin(115200);
  Serial.println("");
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, HIGH);
  WiFi.mode(WIFI_AP);                   // Only Access point (AP mode)
  WiFi.softAP(ssid, password);          // Start HOTspot removing password will disable security
  IPAddress myIP = WiFi.softAPIP();   // Get IP address
  Serial.print("HotSpt IP:");
  Serial.println(myIP);
  server.on("/", FunctionRoot);         // Which routine to handle at root location
  server.on("/form", FunctionForm);     // called only when button pressed
  server.begin();                       // Start server
  Serial.println("HTTP server started");
}
// ============================================================================================
void loop(void){
  server.handleClient();          // Handle client requests
}
// ============================================================================================

아두이노 IDE에 탭으로 추가. 화일명에 주의! "HomePage.h"

AP 주소로 접속한 장치에 보여지는 웹페이지 소스임

// ============================================================================================
// handled by FunctionForm() 
// ============================================================================================
const char MAIN_page[] PROGMEM = R"=====(
<HTML>
<TITLE>
REMOTE IR ON/OFF CONTROL - Fixed IP
</TITLE>
<BODY>
<FONT size=7></FONT>
<CENTER>
<FORM method="post" action="/form">
<TABLE>
<TR><TD colspan=2><B>IoT Based Home Automation Test</B></TD></TR>
<TR><TD>Temp: @@TEMP@@ C</TD><TD></TD></TR>
<TR><TD>Humidity: @@HUMID@@ %</TD><TD>Load Status</TD></TR>

<TR><TD>
<INPUT TYPE=SUBMIT VALUE="LED ON" name=submit>
<INPUT TYPE=SUBMIT VALUE="LED OFF" name=submit></TD>
<TD>@@LED@@</TD></TR>

<TR><TD colspan=2><B><CENTER><A href = "https://diyworld.tistory.com">diyworld.tistory.com</a></CENTER></B></TD></TR>
</TABLE>
</FORM>
</CENTER>
</BODY>
</HTML>
)=====";
// ============================================================================================