title: Arduino C - censoring variable data
body: <p>I have two variables:</p>
  
  <ul>
  <li>dataRx (SLAVE::1234)</li>
  <li>globalAuthcode (1234)</li>
  </ul>
  
  <p>and I comparing</p>
  
  <pre><code>     if(strcmp(dataRx, globalAuthcode) == 0)
  </code></pre>
  
  <p>I can't find function like SUBSTR from PHP :) I want leve only 1234 from dataRx variable.</p>