Rotel P5 Protocol

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Rotel P5

RS232 / IP ASCII Controller Command List

The P5 supports an ASCII based RS232 and IP protocol. The RS232 hardware
does not support flow control so care needs to be taken when sending and receiving
data to avoid packet loss.

The protocol provided is effective for units running firmware V1.03 or later. Units
running earlier firmware should be updated to ensure consistency with the documented
protocol.

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 P5 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 9596, 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, 2019

1.00

Original Specification

October 13, 2019

1.01

Updated to reflect V1.03 firmware updates

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Section 1: Control Command List

P5 ASCII

Command Description

Unit Response

POWER & VOLUME COMMANDS

power_on!

Power On

power=on$

power_off!

Power Off

power=standby$

power_toggle!

Power Toggle

power=on/standby$

vol_up!

Volume Up

volume=##$

vol_dwn!

Volume Down

volume=##$

vol_nn!

Set Volume to level n (01 - 96)

volume=##$

mute!

Mute Toggle

mute=on/off$

mute_on!

Mute On

mute=on$

mute_off!

Mute Off

mute=off$

SOURCE SELECTION COMMANDS

cd!

Source CD

source=cd$

coax1!

Source Coax 1

source=coax1$

coax2!

Source Coax 2

source=coax2$

coax3!

Source Coax 3

source=coax3$

opt1!

Source Optical 1

source=opt1$

opt2!

Source Optical 2

source=opt2$

opt3!

Source Optical 3

source=opt3$

aux1!

Source Aux 1

source=aux1$

aux2!

Source Aux 2

source=aux2$

tuner!

Source Tuner

source=tuner$

phono!

Source Phono

source=phono$

bluetooth!

Source Bluetooth

source=bluetooth$

bal_xlr1!

Source XLR 1

source=bal_xlr1$

bal_xlr2!

Source XLR 2

source=bal_xlr2$

pcusb!

Source PC-USB

source=pc_usb$

SOURCE CONTROL COMMANDS

play!

Play Source

n/a

stop!

Stop Source

n/a

pause!

Pause Source

n/a

trkf!

Track Forward/Tune Up

n/a

trkb!

Track Backward/Tune Down

n/a

TONE CONTROL COMMANDS

bypass_on!

Tone Bypass On

bypass=on$

bypass_off!

Tone Bypass Off

bypass=off$

bass_up!

Bass Up

bass=000/+##/-##$

bass_down!

Bass Down

bass=000/+##/-##$

bass_-10!

Set Bass to -10

bass=-10$

bass_000!

Set Bass to 0

bass=000$

bass_+10!

Set Bass to +10

bass=+10$