Definition: The AVR320 is a small, portable computer that communicates with its external world using LIRLC (low intensity radiolucency) light emission. The term "lircd.conf" refers to a configuration file used by the AVR320 for communication with various hardware devices. This conf file contains settings like communication rate, interface and device identification, protocol support, etc., which allows it to connect to different types of sensors or peripherals on your Raspberry Pi or other devices.