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POArduino: turn on and off ethernet server availability
 

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  1. POArduino: turn on and off ethernet server availability
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    <p>I need to setup an ethernet (web) server that have to be turned on and off depending on some conditions on the Arduino UNO.</p> <p>I read the docs of the <code>Server</code> class in the <a href="http://www.arduino.cc/en/Reference/Ethernet" rel="nofollow"><code>Ethernet</code> library</a> and it seems there is no chance to stop the server once you started, i.e. there is no <code>EthernetServer.begin()</code> counterpart.</p> <p>I thought then to setup the server in the <code>setup</code> section and serve incoming connections depending on when the given condition:</p> <pre><code>EthernetServer server = EthernetServer(80); void setup() { Ethernet.begin(mac, ip); server.begin(); } void loop() { if (condition) { EthernetClient client = server.available(); if (client == true) { // serve the client... } } else { // do something else } } </code></pre> <p>This indeed works, but the client is not properly rejected: it is just leaved pending. In the browser one can see the web page loading idefinitely, and if the condition turns to <code>true</code> the client will eventually be served for the request issued when the condition was <code>false</code>.</p> <p>I see no methods for rejecting the request (there is no counterpart of <code>EthernetServer.available()</code>). The only thing that comes to my mind is to perform a</p> <pre><code>server.available().stop(); </code></pre> <p>in the beginning of the else block. This prevent to serve requests issued while the condition was <code>false</code>, but doesn't prevent the connection between the client and the server to take place (it's like opening a connection and shut it down immediately).</p> <p>How could I avoid to establish connections at all while the condition is <code>false</code>?</p>
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