Install needed package: 1sudo apt install cec-utils Check connected devices 1pi@raspberrypi:~ $ echo 'scan' | cec-client -s -d 1 2opening a connection to the CEC adapter... 3requesting CEC bus information ... 4CEC bus information 5=================== 6device #0: TV 7address: 0.0.0.0 8active source: no 9vendor: …