---
title: "아두이노 이더넷쉴드(웹서버) 외부에서 접속 테스트 성공"
url: "https://maker.wiznet.io/scott/projects/arduino-ethernet-shield-external-access/"
markdown_url: "https://maker.wiznet.io/scott/projects/arduino-ethernet-shield-external-access/md"
type: "UCC: User Created Content"
author: "scott"
author_url: "https://maker.wiznet.io/scott/"
original_author: "scott"
original_url: "https://blog.naver.com/gu04005/222287196705"
published: "2021-05-11"
language: "ko"
hardware: ["Arduino UNO", "Ethernet Shield"]
likes: 0
views: 1177
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# 아두이노 이더넷쉴드(웹서버) 외부에서 접속 테스트 성공

> 아두이노 이더넷쉴드(웹서버) 외부에서 접속 테스트 성공

Original author: scott (source: https://blog.naver.com/gu04005/222287196705)

## Components

- **Arduino UNO** x 1 ([docs](https://www.farnell.com/datasheets/1682209.pdf))
- **Ethernet Shield** x 1

## Article

이 프로젝트는 Arduino UNO를 이용한 Ethernet Shield 예제이다. 글 작성자는 Ethernet Shield를 이용해 WebServer를 간단히 구성을 했다. 공유기를 사용해서 망을 구성했기 때문에 DHCP로 IP를 할당받는 부분도 포함되어 있다. 그리고 외부 인터넷에서 접속하기 위해 공유기의 포트포워딩 설정 방법을 설명하고 있다. <아두이노 코드> #include <SPI.h> #include <Ethernet.h> // Enter a MAC address and IP address for your controller below. // The IP address will be dependent on your local network: byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; IPAddress ip(192,xxx,xxx,xxx);// 공유기에 할당될 내부아이피 입력 // Initialize the Ethernet server library // with the IP address and port you want to use // (port 80 is default for HTTP): EthernetServer server(80); //내부포트 void setup() { // You can use Ethernet.init(pin) to configure the CS pin //Ethernet.init(10); // Most Arduino shields //Ethernet.init(5); // MKR ETH shield //Ethernet.init(0); // Teensy 2.0 //Ethernet.init(20); // Teensy++ 2.0 //Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet //Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only } Serial.println("Ethernet WebServer Example"); // start the Ethernet connection and the server: Ethernet.begin(mac, ip); // Check for Ethernet hardware present if (Ethernet.hardwareStatus() == EthernetNoHardware) { Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); while (true) { delay(1); // do nothing, no point running without Ethernet hardware } } if (Ethernet.linkStatus() == LinkOFF) { Serial.println("Ethernet cable is not connected."); } // start the server server.begin(); Serial.print("server is at "); Serial.println(Ethernet.localIP()); } void loop() { // listen for incoming clients EthernetClient client = server.available(); if (client) { Serial.println("new client"); // an http request ends with a blank line boolean currentLineIsBlank = true; while (client.connected()) { if (client.available()) { char c = client.read(); Serial.write(c); // if you've gotten to the end of the line (received a newline // character) and the line is blank, the http request has ended, // so you can send a reply if (c == 'n' && currentLineIsBlank) { // send a standard http response header client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println("Connection: close"); // the connection will be closed after completion of the response client.println("Refresh: 5"); // refresh the page automatically every 5 sec client.println(); client.println("<!DOCTYPE HTML>"); client.println("<html>"); // output the value of each analog input pin for (int analogChannel = 0; analogChannel < 6; analogChannel++) { int sensorReading = analogRead(analogChannel); client.print("analog input "); client.print(analogChannel); client.print(" is "); client.print(sensorReading); client.println("<br />"); } client.println("접속성공"); client.println("</html>"); break; } if (c == 'n') { // you're starting a new line currentLineIsBlank = true; } else if (c != 'r') { // you've gotten a character on the current line currentLineIsBlank = false; } } } // give the web browser time to receive the data delay(1); // close the connection: client.stop(); Serial.println("client disconnected"); } }

<공유기 설정>

(공유기설정은 cmd->ipconfig치시면 나오는 기본 게이트웨이(아이피)를 인터넷 주소창에 치시면 됩니다)

![](https://postfiles.pstatic.net/MjAyMTAzMjVfNSAg/MDAxNjE2NjU0OTQyODQ0.OGenBTj14nidPyFTePTMIJrpgdvD49BMxXQIB83UQ18g.B1WodNfF7yVtK0e7Uo_mCttafy8UObdOorcwGZoCbrQg.PNG.gu04005/SE-5efa1159-3e8f-4970-b148-add71aca9065.png?type=w580)

![](https://postfiles.pstatic.net/MjAyMTAzMjVfMTk4/MDAxNjE2NjU4ODUyODc1.hW7O63NnwjYss2_WWiCWoTtXPTYZ6ZVkpn37JqEB3JIg.geZo-1nCG9BRkG6GFMtFLRiNJWiXdaYGy-dW_9Ezez4g.PNG.gu04005/SE-a1611a62-6fe8-4ea8-ae05-9f6a9f5a1685.png?type=w580)

![](https://postfiles.pstatic.net/MjAyMTAzMjVfMTA1/MDAxNjE2NjU5Mjg0MzEx.JrbBbgUIET90-FU9z8NZumJWoOn-qh_Ijuui51rJvwwg.n5qk8rqyl-UfqrBtfP8JixItxZPFfwJe9OC8lvpzUK8g.PNG.gu04005/SE-689f52a4-d01a-4e38-8052-4f54fbd30b0e.png?type=w580)

2. 포트포워딩

공유기설정에 접속했으면 포트포워딩을 해줍니다

![](https://postfiles.pstatic.net/MjAyMTAzMjVfMTM4/MDAxNjE2NjU5MzcxOTM4.FoNe3FKMHmwzplVVELcOgoNVYIS6k6fmT-ka0IAp5OMg.ngLCSU4sFJtVgGwzAsTgyGaDzdI4IB84vo-Q2ErxET8g.PNG.gu04005/image.png?type=w580)

포트포워딩이란 외부에서 공유기(외부IP)에 접속했을때

공유기 내부에 설정된 아이피(내부IP-아두이노)로 접근할수 있도록 길을 하나 뚫어주는거라고 생각하시면 편합니다

?

![](https://postfiles.pstatic.net/MjAyMTAzMjVfMTg5/MDAxNjE2NjU4ODgzODQ4.gJ85A1lIfrcxHX91vm9bcVTxx5BkuDKFP12-H34iN6Mg.E0pifbr-5N43b0zvPd7XHHzXkof6-43abek7oEjwiX4g.PNG.gu04005/SE-9eabbff2-eaf9-4af6-afdc-139dc5e7c643.png?type=w580)

이렇게 설정하면 이제 외부에서 xxx.xxx.xxx.xxx.:2020,xxx.xxx.xxx.xxx.:2021을 치면 자동으로 제가 설정한

아두이노 내부아이피:80으로 접속이 됩니다

?

**테스트 결과**

공유기 내부 아이피 할당한모습

![](https://postfiles.pstatic.net/MjAyMTAzMjVfMjM5/MDAxNjE2NjU0NjI1Mzk0.uk6-DYEaKQGTj0_iF63rpg6GRpwCJEW9lu2cEr1Xkssg.l-KKVImcZa9IGl56nV74SgcsGnLOEkzyi4iTDFy860Ug.PNG.gu04005/SE-4468dfa7-f499-428a-b8cc-63d8488c4799.png?type=w580)

외부 LTE로 아두이노 이더넷 서버 접속한 모습

![](https://postfiles.pstatic.net/MjAyMTAzMjVfNDAg/MDAxNjE2NjYwMDYxNjI1.IJaxnjytUr44fADMiP-XH_GvZXtzZBGEGrkLMUtPe4gg.CUuSR5k6WQvW6CSNbaimZbyMJShBKIFbroOZ4aTgUZsg.PNG.gu04005/SE-d4cb1038-f2eb-4166-8d6d-5a2badb127ff.png?type=w580)

**\[출처\]**?[아두이노 이더넷쉴드(웹서버) 외부에서 접속 테스트 성공!](https://blog.naver.com/gu04005/222287196705)|**작성자**?[DeuMiAn](https://blog.naver.com/gu04005)

---

Source: https://maker.wiznet.io/scott/projects/arduino-ethernet-shield-external-access/