Modding a 3 port hdmi switch to simulate button press with arduino remotely : r/arduino
Amazon.co.jp: Timloon HDMI Input Port & USB Input Port, HDMI-E Type Port, USB/HDMI Connection Unit, Audio Relay, Audio Parts, Switch Hole Panel for Toyota Toyota : Automotive
PURE PT-C-HDCEC: HDMI CEC and relay controller, 4K 18 Gb - s at reichelt elektronik
2 Port KVM Switch hdmi Switcher With Cable for Dual Monitor Keyboard Mouse HDMI switch Support desktop controller switching - AliExpress
Vivolink HDMI controller for the meeting room
Controllable Four Outlet Power Relay Module version 2 [(Power Switch Tail Alternative)] : ID 2935 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits