swap()</code> after <code>Serial.begin</code>.</p>
   <p>To use UART1 (TX = GPIO2), use the <code>Serial1</code> object.</p>
   <p>All Arduino Stream functions, like <code>read, write, print, println, ...</code> are supported as well.</p>
   <h4>I²C and SPI</h4>
   <p>You can just use the default Arduino library syntax, like you normally would.</p>
   <h3>Sharing CPU time with the RF part</h3>
   <p>One thing to keep in mind while writing programs for the ESP8266 is that your sketch has to share resources 