title: Should I hardcode TLS certificates in arduino
body: <p>I could connect my <code>ESP8266</code> board to my MQTT server over TLS. Everything works fine.</p>
  <p>There is only one question (as I'm a beginner with encryption): Should I hard code <code>CA.crt</code>, <code>client.crt</code> and <code>client.key</code> on the board??</p>
  <p>As I know, if my certificates expire, I have to purchase another certificate, meaning my boards won't work anymore (I sell them). Can I securely ask server for these files every time?</p>
  <p>EDIT:</p>
  <p>This question was closed because it was opinion-based. OK, give me an opinion! I have no idea to handle my case. Thanks.</p>