RS232 Protocol

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Rotel A11

RS232 ASCII Controller Command List

The A11 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.

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

115200

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

December 18, 2018

1.00

Original Specification

Summary of content (5 pages)

PAGE 1
Rotel A11 RS232 ASCII Controller Command List Date December 18, 2018 Version 1.00 Update Description Original Specification The A11 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.
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Section 1: Control Command List A11 ASCII Command Description POWER & VOLUME COMMANDS power_on! Power On power_off! Power Off power_toggle! Power Toggle vol_up! Volume Up vol_dwn! Volume Down vol_nn! Set Volume to level n (01 - 96) mute! Mute Toggle mute_on! Mute On mute_off! Mute Off SOURCE SELECTION COMMANDS cd! Source CD aux1! Source Aux 1 tuner! Source Tuner phono! Source Phono bluetooth! Source Bluetooth SOURCE CONTROL COMMANDS play! Play Source stop! Stop Source pause! Pause Source trkf! Track Forward
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A11 ASCII Command Description balance_R15! Set Balance to Max Right 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 d
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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: mute? Request current mute status mute=on$ / mute=off$ Current mute status mute=off$ bypass? Request current tone bypass state bypass=on$ / bypass=off$ Current tone bypass state bypass=off$ bass? Request current bass level bass=###$ (+01-10, -01-10, 000) Current tone control bass l
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Command: Description: Return String: Return Description: Example: Command: Description: Return String: Return Description: Example: version? Request the main CPU software version version=#.##$ Rotel main CPU software version version=1.