One efficient way to communicate between Arduino and Linux in Intel® Edison is to use mmap (). See Efficient communication between Arduino* and Linux native processes.

Just gaining access to the additional UARTs isn’t hard. You simply use one of the additional serial port objects available. However, enabling UART 1 causes the ESP32 to crash!

But thanks to the rtl_433_ESP Arduino library developed by [NorthernMan54], we’re now able to pack that functionality into a much smaller package.