怎麼用沒有網路功能的Arduino 板子玩雲??

第 12 屆 iThome 鐵人賽

DAY 15

Software Development

自動化測試開發的美麗與憂愁系列第 15 篇

12th鐵人賽

家誠

團隊哆啦與哆啦好朋友

2020-09-30 00:06:58

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這年頭, 不管是哪種專案都應要跟cloud 扯上關係. 那自動化也要跟雲搭上邊囉 ...

這篇要簡單介紹如何多一塊板子在便宜的Arduino 上就可以有網路服務

筆者手邊有的主板是 arduino leonardo

PS: 這款沒有支援網路功能

要讓這主板能夠上網, 最快的方式就是連接一塊有上網功能的擴充板

PS: 筆者使用的擴充板是W5100

直接在上面多一蓋一層擴充板
修改websocket 範例, 改成自己需要的形式
eth.ino


#include <SPI.h>
#include <Ethernet.h>


byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xEC };
IPAddress ip(192,168,50,177);

// Initialize the Ethernet server library
EthernetServer server(80);

void setup() {
 // Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; 
  }

  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server IP: ");
  Serial.println(Ethernet.localIP());
}


void loop() {
  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 (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>");
          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("</html>");
          break;
        }
        if (c == '\n') {
          currentLineIsBlank = true;
        } 
        else if (c != '\r') {
          currentLineIsBlank = false;
        }
      }
    }
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disconnected");
  }
}