Protocol

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Rotel A12 / A14

RS232 / IP ASCII Controller Command List

The A12 and A14 support 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. A14 will also support IP control using the same command formats.

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 N 8 1 None String

IP Control Settings

The A14 will only 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.

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 25, 2016 1.00 Original Specification

Summary of content (6 pages)

PAGE 1
Rotel A12 / A14 RS232 / IP ASCII Controller Command List Date August 25, 2016 Version 1.00 Update Description Original Specification The A12 and A14 support 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. A14 will also support IP control using the same command formats. All commands sent to the attached Rotel device must have a terminating “!” character.
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Section 1: Control Command List A12/A14 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 coax1! Source Coax 1 coax2! Source Coax 2 opt1! Source Optical 1 opt2! Source Optical 2 aux1! Source Aux 1 aux2! Source Aux 2 tuner! Source Tuner phono! Source Phono usb! Source Fron
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A12/A14 ASCII Command Description treble_000! Set Treble to 0 treble_+10! Set Treble to +10 BALANCE CONTROL COMMANDS balance_r! Balance Right balance_l! 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 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
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Section 2: Feedback Request Command List Command: Description: Return String(s): Return Description: Example: Command: Description: power? Request current power status power=on$ / power=standby$ Current power status power=on$ Return Description: Example: source? Request current source source=cd$ / source=coax1$ / source=coax2$ / source=opt1$ / source=opt2$ / source=tuner$ / source=phono$ / source=usb$ / source=aux1$ / source=aux2$ / source=pc_usb$ / source=bluetooth$ Current source source=usb$ Command:
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Command: Description: Return String(s): Return Description: Example: Command: Description: balance? Request current balance setting balance=###$ (L01-15, R01-15, 000) Current balance setting balance=L03$ Return Description: Example: freq? Request current frequency for digital source input freq=off$ / freq=32$ / freq=44.1$ / freq=48$ / freq=88.2$ / freq=96$ / freq=176.
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Command: Description: Return String: Return Description: Example: ip? Request the IP address of the product (A14 only) ipaddress=###.###.###.###$ Current IP address ipaddress =192.168.100.