Remote Control Transceiver (RMT)
The Rmt class provides a wrapper around the ESP32 RMT peripheral. It allows you to send infrared signals with the ESP32. See the esp-idf documentation for more information about the RMT peripheral. (https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/rmt.html)
The RmtEncoder class provides a wrapper around the ESP32 rmt encoder functionality. It allows you to encode infrared signals with the ESP32. See the esp-idf documentation for more information about the RMT encoder (https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/rmt.html#rmt-encoder)
The main functionality of the Rmt / RmtEncoder classes beyond what is provided by the esp-idf is to allow the use of the RMT peripheral with c++ functions (such as with bound functions, functionals, etc.). It also provides a simpler wrapper / interface to the user.