Question

我正在使用此域http://www.decathlon.commonarchitecture.ca/来托管我的phpmyadmin数据库和php代码。我想在串口监视器中读取数据库的特定列，一个接一个地显示每个数字。我不确定是使用GSM屏蔽，以太网屏蔽还是Arduino wifi屏蔽。这是我的PHP代码（缩进我不知道）：

<?php

 $dbhost = "mysql.commonarchitecture.ca";
 $username = "arduinodb";
 $password = "*******";
 $db = "arduinodb" ;

    mysql_connect("$dbhost" , "$username" , "$password");
     //echo "Connected" ; 

    //select db
    mysql_select_db($db);
    //echo "Connected to db" ;

  $sql="SELECT * FROM data";

  $records=mysql_query($sql);

 ?>

 <!DOCTYPE html>
 <html>

 <head>
 <title> Consumption Data </title>
 </head>

 <body>

 <table width="600" border="1" cellpadding="1" cellspacing"1">

 <tr>

 <th>Day</th>
 <th>Date</th>
 <th>Water Consumption (liters per person)</th>

 <tr>

 <?php

    while($data=mysql_fetch_assoc($records)) {

         echo "<tr>";

         echo "<td>".$data['id']."</td>";

         echo "<td>".$data['date']."</td>";

         echo "<td>".$data['value']."</td>";

         echo "</tr>";

     }//end while

     ?>

 </table>

 </body>
 </html>

代码有效，但是我不确定如何在Arduino上读取数据（对Arduino来说很新）

这是我的Arduino代码与以太网盾配对

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


byte mac[] = {   0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress ip(192, 168, *, *);

EthernetClient client;

char server[] = "www.decathlon.commonarchitecture.ca";


void setup()
{
   Serial.begin(9600);

  // attempt a DHCP connection:
  Serial.println("Attempting to get an IP address using DHCP:");
  if (!Ethernet.begin(mac)) {
  // if DHCP fails, start with a hard-coded address:
  Serial.println("failed to get an IP address using DHCP, trying 
  manually");
     Ethernet.begin(mac, ip);
  }

  Serial.print("My address:");
  Serial.println(Ethernet.localIP());
}


void loop()
{
    // connect to the server
    if (client.connect(server, 80))
    {
        // print to serial monitor
        Serial.println("connected...");
        Serial.println("ARDUINO: forming HTTP request message");

        // send data the server through GET request
        client.print("GET /index.php?value");
        client.println(" HTTP/1.1");
        client.print("HOST:  ");
        client.println(server);

        Serial.println("ARDUINO: HTTP message sent");       

        // give server time to receive request
        delay(1000);

        // get the response from the page and print it to serial port
        // to ascertain that request was received properly
        if(client.available())
        {
            Serial.println("ARDUINO: HTTP message received");
            Serial.println("ARDUINO: printing received headers and 
script response...\n");

            while(client.available())
            {
                char c = client.read();
                Serial.print(c);
            }
        }
        else
        {
            Serial.println("ARDUINO: no response received / no response 
received in time");
        }

        client.stop();
    }
    // do nothing forever after:
    while(true);
}

我现在的问题是让Arduino读取我的php数据，我可以不使用http GET请求在我的串口监视器中显示数据吗？我正确使用此功能吗？有大量关于使用php / my s将Arduino传感器数据发布到Web上的文档，但没有那么多关于将设置数据检索回串行监视器的文档。这是监视器当前读取的内容......

Attempting to get an IP address using DHCP:
My address:192.168.*.*
connected...
ARDUINO: forming HTTP request message
ARDUINO: HTTP message sent
ARDUINO: no response received / no response received in time

PHP /我的SQL数据库 - ＆gt;到Arduino串行监视器

0 个答案: