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<title>아두이노 IoT(WiFi) 기초 예제 변형 - 서보모터 & 센서 모니터링 | 양파고</title>
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<aside> 💡 이 페이지에서 설명하는 방식은 반드시 같은wifi에 연결필요
웹 브라우저 화면의 변경을 아두이노 안에서 html태그를 이용해 제어할 수 있음 WiFiClient클래스를 통해 client객체를 만들고, clinet객체를 조정하는 방식
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[참조 사이트]
[주의점] 아두이노 우노 R4 WiFi는 2.4GHz 대역만 지원합니다. (WiFi - 5GHz 사용 불가)
/*
WiFi Web Server LED Blink
A simple web server that lets you blink an LED via the web.
This sketch will print the IP address of your WiFi module (once connected)
to the Serial Monitor. From there, you can open that address in a web browser
to turn on and off the LED_BUILTIN.
If the IP address of your board is yourAddress:
<http://yourAddress/H> turns the LED on
<http://yourAddress/L> turns it off
This example is written for a network using WPA encryption. For
WEP or WPA, change the WiFi.begin() call accordingly.
Circuit:
* Board with NINA module (Arduino MKR WiFi 1010, MKR VIDOR 4000 and Uno WiFi Rev.2)
* LED attached to pin 9
created 25 Nov 2012
by Tom Igoe
Find the full UNO R4 WiFi Network documentation here:
<https://docs.arduino.cc/tutorials/uno-r4-wifi/wifi-examples#simple-webserver>
*/
#include "WiFiS3.h"
#include "arduino_secrets.h"
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0; // your network key index number (needed only for WEP)
int led = LED_BUILTIN;
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
Serial.begin(9600); // initialize serial communication
pinMode(led, OUTPUT); // set the LED pin mode
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
Serial.println("Please upgrade the firmware");
}
// attempt to connect to WiFi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to Network named: ");
Serial.println(ssid); // print the network name (SSID);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
server.begin(); // start the web server on port 80
printWifiStatus(); // you're connected now, so print out the status
}
void loop() {
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out to the serial monitor
if (c == '\\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("<p style=\\"font-size:7vw;\\">Click <a href=\\"/H\\">here</a> turn the LED on<br></p>");
client.print("<p style=\\"font-size:7vw;\\">Click <a href=\\"/L\\">here</a> turn the LED off<br></p>");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
} else { // if you got a newline, then clear currentLine:
currentLine = "";
}
} else if (c != '\\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(LED_BUILTIN, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(LED_BUILTIN, LOW); // GET /L turns the LED off
}
}
}
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}
접속할 WiFi 정보를 ‘arduino_secrets.h 헤더파일에 적어준 뒤 예제 코드를 업로드하고, 시리얼 모니터 실행하기
주의 아래 처럼 simpleWebServerWifi.ino를 수정하는 것이 X
이상없이 실행되었다면 시리얼 모니터창에 다음과 같이 아두이노의 IP 주소가 출력되어야 함
여기서 나온 IP주소를 웹브라우저에 적어 접속하기