title: String to const char* in Arduino?
body: <p>I have a variable <code>tweet</code> that is  a string and it has a character at the very beginning that I want to clip off. </p>
  
  <p>So what I want to do is use <code>strstr()</code> to remove it. Here's my code:</p>
  
  <pre><code>tweet = strstr(tweet, "]");
  </code></pre>
  
  <p>However, I get this error: </p>
  
  <pre><code>cannot convert 'String' to 'const char*' for argument '1' to 
  'char' strstr(const char*, const char*)
  </code></pre>
  
  <p>So my thought would be to convert <code>tweet</code> into a char. How would I go about doing so?</p>