HP ep7112 HP ep7100 Series Home Cinema Digital Projector - User's Guide - Page 48
Connecting to a room controller, Serial connections, Examples of room controller commands
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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, "" and "" 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 as a terminator: * command = parameter Requests can contain only ASCII alphanumeric characters. Blanks (spaces) are allowed, except within keywords and numbers. Line feeds are ignored. 48 User's Guide