title: TK103, TCP data contains unknown string
body: <p>I am working on a code that gets location from a GPS tracker to a server, the GPS tracker uses <code>TK103</code> as it's <code>TCP</code> communication protocol and it works fine.</p>
  
  <p>The device sends proper data stream something like,</p>
  
  <pre><code>(057045144658BP05357857045144658180301A0604.8437N08018.7523E000.0002656000.0001000000L00000000)
  </code></pre>
  
  <p>But recently i saw this data stream contains some other format, may be another data stream but same command <code>BP05</code> as follows,</p>
  
  <pre><code>(057045144658BP05357857045144658,{413,1,61540,13292}{413,1,61540,15608}{413,1,61540,13247},01000000)
  </code></pre>
  
  <p>Device sends second data stream continuously for some time and then fall back to the previous one, this happens multiple times. Same string every time, no changes.</p>
  
  <p>I use a <code>Java Netty</code> server as the <code>TCP</code> server.</p>
  
  <p>What is this second data string and why this happens, how can i avoid this ? any suggestion is highly appreciated.</p>