HP ep7100 manual Connecting to a room controller, Serial connections

Installing permanently

Connecting to a room controller

If your projector has a serial port, you can connect the projector to a room controller using a serial (RS-232) cable. After you program the room controller using the following commands, you can use the room controller to operate the projector and other components of your home theater.

Serial connections

The serial port on the projector uses a standard serial (RS-232) cable:

■Pin 2: data sent to the projector (RxD)

■Pin 3: data sent from the projector (TxD)

■Pin 5: ground

The room controller must use the following serial (RS-232) settings:

■9600 baud

■1 start bit + 8 data bits (D0=LSB, D7=MSB) + 1 stop bit

■No parity

■Full duplex communication channels (no flow control)

■No handshaking

Examples of room controller commands

In the following examples, “<CR>” and “<LF>” represent a carriage return and line feed, respectively.

Commands are sent to the projector as "requests" which consist of an asterisk (*) prefix, the command name, any needed parameter, and a carriage return <CR> as

aterminator:

*command = parameter <CR>

Requests can contain only ASCII alphanumeric characters. Blanks (spaces) are allowed, except within keywords and numbers. Line feeds <LF> are ignored.

48 User’s Guide