Rotel RDD-1580 Protocol

Rotel RDD-1580

RS232 ASCII Controller Command List

Date Version Update Description

December 26, 2013 1.00 Original Specification

The RDD-1580 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 with either have a terminating “!”
character or a byte count for variable length text data that may include a “!” in the
returned message. It is up to the sending/receiving control application to properly parse
and process the packets.

Note: The byte count only includes the text data and not the length or “,” character.

Connection Settings

Baud Rate Parity Valid Data Bits Stop Bit Value Handshaking Data Type

115200 N 8 1 None String

Communication Protocol

Command and response messages are included on the following pages.

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Section 1: Control Command List

RDD-1580 ASCII Command Description Unit Response

POWER COMMANDS

power_on! Power On power=on!
power_off! Power Off power=standby!
power_toggle! Power Toggle power=on/standby!

SOURCE SELECTION COMMANDS

coax1! Source Coax 1 source=coax1!
coax2! Source Coax 2 source=coax2!
opt1! Source Optical 1 source=opt1!
opt2! Source Optical 2 source=opt2!
usb! Source Front USB source=usb!
pc_usb! Source PC-USB source=pc_usb!

SOURCE CONTROL COMMANDS

play! Play Source play_status=play!
pause! Pause Source n/a
track_fwd! Track Forward/Tune Up n/a
track_back! Track Backward/Tune Down n/a
random! Random Play Mode Toggle n/a
repeat! Repeat Play Mode Toggle n/a

OTHER COMMANDS

pcusb_class_1! Set PC-USB Audio Class to 1.0 pcusb_class=1!
pcusb_class_2! Set PC-USB Audio Class to 2.0 pcusb_class=2!

Section 2: Feedback Request Command List

Command: get_product_type!

Description: Request the product type

Return String: product_type=##,text

Return Description:

Example: product_type=08,RDD-1580

Command: get_product_version!

Description: Request the main CPU software version

Return String: product_version=##,text

Return Description:

Example: product_version=06,V1.1.4

Rotel product type name, must include 2 digit length of text string at
beginning followed by "," and text string (no terminating character)

Rotel main CPU software version, must include 2 digit length of text string at
beginning followed by "," and text string (no terminating character)

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