ir-ctl

install

# apt install v4l-utils

root@nuc2:~# ir-ctl --features
Receive features /dev/lirc0:
 - Device can receive raw IR
 - Set receive carrier
 - Can set recording timeout min:100000 microseconds max:1000000 microseconds
Send features /dev/lirc0:
 - Device can send raw IR
 - Set carrier
 - Set duty cycle

sniff

root@nuc2:~# ir-ctl -r -m -v