The `extron` plugin allows you to control Extron SW series switchers (ex. SW4 USB, SW4 VGA, etc.). There are up to 4 Ports per switcher. Input pulls the the current state from the switcher, Output switches the active port.
```yaml
kvmd:
gpio:
drivers:
extron_vga:
type: extron
device: /dev/ttyUSB0 # The path to the RS-232 serial adapter