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POArduino Ethernet Shield Not Connecting to WebServer
 

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  1. POArduino Ethernet Shield Not Connecting to WebServer
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    <p>I have a problem making my Arduino Ethernet shield to communicate with the server, the result on the serial monitor is always:</p> <p>my arduino code is</p> <pre><code>#include &lt;Ethernet.h&gt; //library for ethernet functions #include &lt;SPI.h&gt; #include &lt;Dns.h&gt; #include &lt;Client.h&gt; //library for client functions #include &lt;DallasTemperature.h&gt; //library for temperature sensors // Ethernet settings byte mac[] = {0x09,0xA2,0xDA,0x00,0x01,0x26}; //Replace with your Ethernet shield MAC byte ip[] = { 192,168,0,54}; //The Arduino device IP address byte subnet[] = { 255,255,255,0}; byte gateway[] = { 192,168,0,1}; IPAddress server(192,168,0,53); // IP-adress of server arduino sends data to EthernetClient client; bool connected = false; void setup(void) { Serial.begin(9600); Serial.println("Initializing Ethernet."); delay(1000); Ethernet.begin(mac, ip , gateway , subnet); } void loop(void) { if(!connected) { Serial.println("Not connected"); if (client.connect(server, 80)) { connected = true; int temp =analogRead(A1); Serial.print("Temp is "); Serial.println(temp); Serial.println(); Serial.println("Sending to Server: "); client.print("GET /formSubmit.php?t0="); Serial.print("GET /formSubmit.php?t0="); client.print(temp); Serial.print(temp); client.println(" HTTP/1.1"); Serial.println(" HTTP/1.1"); client.println("Host: http://localhost/PhpProject1/"); Serial.println("Host: http://localhost/PhpProject1/"); client.println("User-Agent: Arduino"); Serial.println("User-Agent: Arduino"); client.println("Accept: text/html"); Serial.println("Accept: text/html"); //client.println("Connection: close"); //Serial.println("Connection: close"); client.println(); Serial.println(); delay(10000); } else{ Serial.println("Cannot connect to Server"); } } else { delay(1000); while (client.connected() &amp;&amp; client.available()) { char c = client.read(); Serial.print(c); } Serial.println(); client.stop(); connected = false; } } </code></pre> <p>the server is an Apache server running on a pc, the server ip address in the code is the pc ip address. For testing purposes I work at my homes network, there's no proxy or firewall, and I also turned of the antivirus and firewall on my pc.</p> <p>the result in the serial monitor is always:</p> <pre><code>Not connected Cannot connect to Server </code></pre> <p>Any thoughts??</p>
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    1. COIs the server running? What does `telnet 192.168.0.53 80` return? Are you connecting over a proxy or firewall (doesn't seem so, but have to ask)? Perhaps try the simpler `Ethernet.begin( mac , ip )` to rule out issues with the gateway.
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    2. COthe server is an Apache server running on a pc, the server ip address is the pc ip address. the `telnet 192.168.0.53 80` works successfully. For testing purposes I work at my homes network, there's no proxy or firewall, and I also turned of the antivirus and firewall on my pc.
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