Protocol

1
Rotel CD14
RS232 ASCII Controller Command List
The CD14 supports an ASCII based RS232 protocol. The RS232 hardware does
not support flow control so care needs to be take when sending and receiving data to
avoid packet loss.
All commands sent to the attached Rotel device must have a terminating “!” character.
Example Command: power_on!
Note: Do not include any spaces in the command, and do not include a carriage return
or line feed after the command, only the “!” terminating character.
Status information from the attached Rotel product will have a terminating “$” character
for fixed lenth options. Variable-length strings (i.e. CD disc/track metadata) will be
terminated with a double character ‘$$’ instead. It is up to the sending/receiving control
application to properly parse and process the packets.
Connection Settings
Baud Rate Parity Valid Data Bits Stop Bit Value Handshaking Data Type
57600 N 8 1 None String
Communication Protocol
Command and response messages are included on the following pages.
Automatic status update information can be enabled/disabled using the
“rs232_update_on” and “rs232_update_off” commands.
With RS232 update set to ON, any status changes to the unit will be transmitted via
RS232. With RS232 update set to OFF, the unit will not send any feedback unless polled
by the controller.
Date Version Update Description
August 26, 2016 1.00 Original Specification