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<title>NRF24: nrf24_ping_server.pde</title>
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   <div id="projectname">NRF24
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<div class="title">nrf24_ping_server.pde</div>  </div>
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<p>Example sketch showing how to create a simple messageing server with the <a class="el" href="classNRF24.html" title="Send and receive addressed, reliable, acknowledged datagrams by nRF24L01. ">NRF24</a> class. It is designed to work with the example nrf24_ping_client. It also works with ping_client from the Mirf library</p>
<div class="fragment"><div class="line"><span class="comment">// nrf24_ping_server.pde</span></div>
<div class="line"><span class="comment">// -*- mode: C++ -*-</span></div>
<div class="line"><span class="comment">// Example sketch showing how to create a simple messageing server</span></div>
<div class="line"><span class="comment">// with the NRF24 class. </span></div>
<div class="line"><span class="comment">// It is designed to work with the example nrf24_ping_client. </span></div>
<div class="line"><span class="comment">// It also works with ping_client from the Mirf library</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include &lt;NRF24.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;SPI.h&gt;</span></div>
<div class="line"></div>
<div class="line"></div>
<div class="line"><span class="comment">// Singleton instance of the radio</span></div>
<div class="line"><a name="_a0"></a><a class="code" href="classNRF24.html">NRF24</a> nrf24;</div>
<div class="line"><span class="comment">// NRF24 nrf24(8, 7); // use this to be electrically compatible with Mirf</span></div>
<div class="line"><span class="comment">// NRF24 nrf24(8, 10);// For Leonardo, need explicit SS pin</span></div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> setup() </div>
<div class="line">{</div>
<div class="line">  Serial.begin(9600);</div>
<div class="line">  <span class="keywordflow">while</span> (!Serial) </div>
<div class="line">    ; <span class="comment">// wait for serial port to connect. Needed for Leonardo only</span></div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a1"></a><a class="code" href="classNRF24.html#a6e98cf508939240c1805245170a995f6">init</a>())</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;NRF24 init failed&quot;</span>);</div>
<div class="line">  <span class="comment">// Defaults after init are 2.402 GHz (channel 2)</span></div>
<div class="line">  <span class="comment">// Now be compatible with Mirf ping_client</span></div>
<div class="line"> <span class="keywordflow">if</span> (!nrf24.<a name="a2"></a><a class="code" href="classNRF24.html#a3fa90005f98eb2744a533899f9b7e023">setChannel</a>(1))</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;setChannel failed&quot;</span>);</div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a3"></a><a class="code" href="classNRF24.html#ade21e0bd4f92d0dfa45909bbbb0e4b01">setThisAddress</a>((uint8_t*)<span class="stringliteral">&quot;serv1&quot;</span>, 5))</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;setThisAddress failed&quot;</span>);</div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a4"></a><a class="code" href="classNRF24.html#adb2fbd1d1aadaad1e9b268508149b6c8">setPayloadSize</a>(<span class="keyword">sizeof</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)))</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;setPayloadSize failed&quot;</span>);</div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a5"></a><a class="code" href="classNRF24.html#a3453db8390d5be4aa99d8c7fde3062a4">setRF</a>(<a name="a6"></a><a class="code" href="classNRF24.html#a52d7af9188397d4a6f5dab55d4f04742aca0c89dd1b40bdc57b7026d8da54de9a">NRF24::NRF24DataRate2Mbps</a>, <a name="a7"></a><a class="code" href="classNRF24.html#a8386e81a9a4b824ab26e785879684c7eacef1d6c037e276e6dadaff2b6056ec0c">NRF24::NRF24TransmitPower0dBm</a>))</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;setRF failed&quot;</span>);    </div>
<div class="line">  Serial.println(<span class="stringliteral">&quot;initialised&quot;</span>);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> loop()</div>
<div class="line">{</div>
<div class="line"><span class="comment">//  Serial.println(&quot;waiting&quot;);</span></div>
<div class="line">  nrf24.<a name="a8"></a><a class="code" href="classNRF24.html#a5260f3e5eeb911e720290e652f628ab5">waitAvailable</a>();</div>
<div class="line">  <span class="comment">// ping_client sends us an unsigned long containing its timestamp</span></div>
<div class="line">  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> data;</div>
<div class="line">  uint8_t len = <span class="keyword">sizeof</span>(data);</div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a9"></a><a class="code" href="classNRF24.html#a12799e0afcb52f2a8cb7418dca9e0eab">recv</a>((uint8_t*)&amp;data, &amp;len))</div>
<div class="line">    Serial.println(<span class="stringliteral">&quot;read failed&quot;</span>);</div>
<div class="line"><span class="comment">//   Serial.println(data);</span></div>
<div class="line"></div>
<div class="line">  <span class="comment">// Now send the same data back</span></div>
<div class="line">  <span class="comment">// Need to set the address of the detination each time, since auto-ack changes the TX address</span></div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a10"></a><a class="code" href="classNRF24.html#a7b40c4c481bddf343acdac5179fddc75">setTransmitAddress</a>((uint8_t*)<span class="stringliteral">&quot;clie1&quot;</span>, 5))</div>
<div class="line">   Serial.println(<span class="stringliteral">&quot;setTransmitAddress failed&quot;</span>);</div>
<div class="line">  <span class="comment">// Send the same data back   </span></div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a11"></a><a class="code" href="classNRF24.html#aad280539b80b28e55ab3187714bc7f2f">send</a>((uint8_t*)&amp;data, <span class="keyword">sizeof</span>(data)))</div>
<div class="line">     Serial.println(<span class="stringliteral">&quot;send failed&quot;</span>);  </div>
<div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a12"></a><a class="code" href="classNRF24.html#a78a011cddedb14b8764ad5ea760c28ae">waitPacketSent</a>())</div>
<div class="line">  {</div>
<div class="line">     Serial.println(<span class="stringliteral">&quot;waitPacketSent failed&quot;</span>);  </div>
<div class="line">  }</div>
<div class="line">}</div>
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