oServiceDataAck</span> <span class="o">=</span> <span class="mh">0xFE</span></code></pre>

  
  <h4>Swift</h4>
  <pre class="highlight swift"><code><span class="k">case</span> <span class="n">serviceDataAck</span> <span class="o">=</span> <span class="mi">254</span></code></pre>

  
  
  
  <h3 id="section-SDLFrameInfoHeartbeatACK">
      SDLFrameInfoHeartbeatACK
  </h3>
  
  <p>Acknowledges that a Heartbeat control packet has been received.</p>

  
  
  <h4>Objective-C</h4>
  <pre class="highlight objectiv