This will not work with Arduino IDE 1.6.5 (or below) or with non ESP32-S2/S3 devices (e.g. Arduino UNO, Arduino MEGA, etc.). To use this library you need to have Arduino core for the ESP32 installed.
The ESP32 keeps finding new jobs in my house.
I didn't expect to love it, and it has a learning curve, but the possibilities are endless.
Dmx breakdetection is done through the use of the RMT peripheral and reception on the UART. Compiles and works on Core 2.0.x and from Core 3.3.x onwards. Core version 3 had a fatal bug in the RMT ...