RS232 Protocol

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Rotel RA-1592/RA-1592MKII

RS232 / IP ASCII Controller Command List

The RA-1592 and RA-1592MKII supports an ASCII based RS232 and IP 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 “!” or

“$” character, depending on the protocol revision (see update below), 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.

Important Protocol Revision

As of software V1.53, the RS232 and IP protocol was updated with changes to some

commands as well as all feedback strings. This change will impact existing control

systems so any connected control systems should be updated to utilize the new

protocol before updating the software in the RA-1592.

The current commands and feedback strings are documented in Sections 1 & 2, while

the legacy commands for older software is documented in Sections 3 & 4. A summary

and list of specific changes is also provided in Appendix A.

The RS232 connection settings and IP control port remain unchanged with the 2.0

specification.

Connection Settings

Baud Rate

Parity

Valid Data Bits

Stop Bit Value

Handshaking

Data Type

115200

None

String

Date

Version

Update Description

February 5, 2016

1.00

Original Specification

September 16, 2016

1.01

Corrected volume scale from 1 - 86 to 1 - 96

January 3, 2019

2.00

Add V2.0 specification and details on change

Summary of content (15 pages)

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Rotel RA-1592/RA-1592MKII RS232 / IP ASCII Controller Command List Date February 5, 2016 September 16, 2016 January 3, 2019 Version 1.00 1.01 2.00 Update Description Original Specification Corrected volume scale from 1 - 86 to 1 - 96 Add V2.0 specification and details on change The RA-1592 and RA-1592MKII supports an ASCII based RS232 and IP protocol. The RS232 hardware does not support flow control so care needs to be take when sending and receiving data to avoid packet loss.
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IP Control Settings The RA-1592 and RA-1592MKII will accept and respond to IP control commands if the product is connected to a local network and has a valid IP address. Commands will be accepted via TCP port 9590, and the unit will send responses back via the same port. The command and response format is identical to the serial commands. Communication Protocol Command and response messages are included on the following pages.
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RA-1592 /RA-1592MKII ASCII Command Description SOURCE SELECTION COMMANDS cd! Source CD coax1! Source Coax 1 coax2! Source Coax 2 coax3! Source Coax 3 opt1! Source Optical 1 opt2! Source Optical 2 opt3! Source Optical 3 aux! Source Aux tuner! Source Tuner phono! Source Phono usb! Source Front USB bluetooth! Source Bluetooth bal_xlr! Source XLR pcusb! Source PC-USB SOURCE CONTROL COMMANDS play! Play Source stop! Stop Source pause! Pause Source trkf! Track Forward/Tune Up trkb! Track Backward/Tune Down TONE CO
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RA-1592 /RA-1592MKII ASCII Command Description SPEAKER OUTPUT COMMANDS speaker_a! Toggle Speaker A Output speaker_b! Toggle Speaker B Output speaker_a_on! Speaker A Output On speaker_a_off! Speaker A Output Off speaker_b_on! Speaker B Output On speaker_b_off! Speakler B Output Off OTHER COMMANDS dimmer! Toggle display dimmer dimmer_0! Set display to brightest setting dimmer_1! Set display to dimmer level 1 dimmer_2! Set display to dimmer level 2 dimmer_3! Set display to dimmer level 3 dimmer_4! Set display
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Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): volume? Request current volume value volume=##$ 2 digit current volume level volume=40$ mute? Request current mute status mute=on$ / mute=off$ Current mute status mute=off$ bypass? Request current tone bypass state bypass=on$ / bypass=off$ Return Description: Example: Current tone bypass state bypass=off$ Command: Description:
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Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: Return String: speaker? Request current active speaker outputs speaker=a$ / speaker=b$ / speaker=a_b$ / speaker=off$ Current active speaker outputs speaker=a$ dimmer? Request current front display dimmer level dimmer=0$ / dimmer=1$ / dimmer=2$ / dimmer=3$ / dimmer=4$ / dimmer=5$ /
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Command: Description: Return String: Return Description: Example: Command: Description: Return String: Return Description: Example: model? Request the model number model=text$ Rotel model number model=RA-1592$ discover? Request the device to identify itself on the network discover=ip=###.###.###.### port=#### mac=############$ Device’s IP address, port number and MAC address discover=ip=192.168.100.25 port=9596 mac=0cefaf90125e$ Section 3: Control Command List V1.0 Applies to RA-1592 prior to V1.
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RA-1592 ASCII Command Description bal_xlr! Source XLR bluetooth! Source Bluetooth rcd! Source Rotel CD SOURCE CONTROL COMMANDS play! Play Source stop! Stop Source pause! Pause Source track_fwd! Track Forward/Tune Up track_back! Track Backward/Tune Down fast_fwd! Fast Forward/Search Forward fast_back! Fast Backward/Search Backward MENU CONTROL COMMANDS menu! Display the Menu exit! Exit Key up! Cursor Up down! Cursor Down left! Cursor Left right! Cursor Right enter! Enter Key NUMERIC KEY COMMANDS 1! N
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RA-1592 ASCII Command Description treble_up! Treble Up treble_down! Treble Down treble_-10! Set Treble to -10 treble_000! Set Treble to 0 treble_+10! Set Treble to +10 BALANCE CONTROL COMMANDS balance_right! Balance Right balance_left! Balance Left balance_L15! Set Balance to Max Left balance_000! Set Balance to 0 balance_R15! Set Balance to Max Right SPEAKER OUTPUT COMMANDS speaker_a! Toggle Speaker A Output speaker_b! Toggle Speaker B Output OTHER COMMANDS dimmer! Toggle display dimmer dimmer_0! Set displ
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Section 4: Feedback Request Command List V1.0 Applies to RA-1592 prior to V1.
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Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: get_display_update! Request display update (Requires Main Software V1.2.
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Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: Command: get_pcusb_class! Request current PC-USB class pcusb_class=1! / pcusb_class=2! Current PC-USB class pcusb_class=1! get_current_speaker! Request active speaker outputs speaker=off! / speaker=a! / speaker=b! / speaker=a_b! Active
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Command: Description: Return String(s): Return Description: Example: Command: Description: Return String(s): Return Description: Example: get_mute_status! Request current mute status. mute=off! / mute=on! Current mute state mute=on! get_power_mode! Request current power mode.
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Appendix A: Summary of Changes V1.0 – V2.0 A list of the specific changed commands and feedback strings between the V1.0 and V2.0 specification is detailed here. Global Changes In addition to the specific changes below, the terminating character on all feedback strings has changed to the “$” character instead of the previous “!” character. An example response string is provided below. Unit Response V1.0 bypass=off! Unit Response V2.0 bypass=off$ Control Command Changes Command V1.
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Feedback Request Command Changes Note the listed responses below may not include all values – refer to the appropriate command in the main documentation sections for the full list of potential response values. Command V1.