You can control the projector from an external device using ESC/VP21.
When a command is input, the projector executes the command and returns a":", and then accepts the next command.
If the command being processed terminates abnormally, an error message is output and a ":" is returned.
Add a Carriage Return (CR) code (0Dh) to the end of each command and transmit.
For additional information, visit the Epson website and search for your product's support page.