1
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$
3
P5 ASCII
Command Description
Unit Response
treble_up!
Treble Up
treble=000/+##/-##$
treble_down!
Treble Down
treble=000/+##/-##$
treble_-10!
Set Treble to -10
treble=-10$
treble_000!
Set Treble to 0
treble=000$
treble_+10!
Set Treble to +10
treble=+10$
BALANCE CONTROL COMMANDS
balance_r!
Balance Right
balance=000/L##/R##$
balance_l!
Balance Left
balance=000/L##/R##$
balance_L15!
Set Balance to Max Left
balance=L15$
balance_000!
Set Balance to 0
balance=000$
balance_R15!
Set Balance to Max Right
balance=R15$
OTHER COMMANDS
dimmer_0!
Set display to brightest setting
dimmer=0$
dimmer_1!
Set display to dimmer level 1
dimmer=1$
dimmer_2!
Set display to dimmer level 2
dimmer=2$
dimmer_3!
Set display to dimmer level 3
dimmer=3$
dimmer_4!
Set display to dimmest setting
dimmer=4$
RS232 FEEDBACK COMMANDS
rs232_update_on!
Set RS232 Update to Auto (On)
update_mode=auto$
rs232_update_off!
Set RS232 Update to Manual (Off)
update_mode=manual$
Section 2: Feedback Request Command List
Command:
power?
Description:
Request current power status
Return String(s):
power=on$ / power=standby$
Return Description:
Current power status
Example:
power=on$ Command:
source?
Description:
Request current source
Return String(s):
source=cd$ / source=coax1$ / source=coax2$ / source=coax3$ /
source=opt1$ / source=opt2$ / source=opt3$ / source=tuner$ /
source=phono$ / source=aux1$ / source=aux2$ / source=pc_usb$ /
source=bluetooth$ / source=bal_xlr1$ / source=bal_xlr2$
Return Description:
Current source
Example:
source=coax1$ Command:
volume?
Description:
Request current volume value
Return String(s):
volume=##$
Return Description:
2 digit current volume level
Example:
volume=40$
4
Command:
mute?
Description:
Request current mute status
Return String(s):
mute=on$ / mute=off$
Return Description:
Current mute status
Example:
mute=off$ Command:
bypass?
Description:
Request current tone bypass state
Return String(s):
bypass=on$ / bypass=off$
Return Description:
Current tone bypass state
Example:
bypass=off$
Command:
bass?
Description:
Request current bass level
Return String(s):
bass=###$ (+01-10, -01-10, 000)
Return Description:
Current tone control bass level
Example:
bass=+02$
Command:
treble?
Description:
Request current treble level
Return String(s):
treble=###$ (+01-10, -01-10, 000)
Return Description:
Current tone control treble level
Example:
treble=-01$
Command:
balance?
Description:
Request current balance setting
Return String(s):
balance=###$ (L01-15, R01-15, 000)
Return Description:
Current balance setting
Example:
balance=L03$
Command:
freq?
Description:
Request current frequency for digital source input
Return String(s):
freq=off$ / freq=32$ / freq=44.1$ / freq=48$ / freq=88.2$ / freq=96$ /
freq=176.4$ / freq=192$ / freq=384$
Return Description:
Current frequency for digital source input
Example:
freq=48$
Command:
dimmer?
Description:
Request current front display dimmer level
Return String(s):
dimmer=0$ / dimmer=1$ / dimmer=2$ / dimmer=3$ / dimmer=4$
Return Description:
Current front display dimmer level
Example:
dimmer=3$
5
Command:
version?
Description:
Request the software version
Return String:
version=#.##$
Return Description:
Rotel main CPU software version
Example:
version=1.02$ Command:
ip?
Description:
Request the IP address of the product
Return String:
ipaddress=###.###.###.###$
Return Description:
Current IP address
Example:
ipaddress =192.168.100.8$
Command:
mac?
Description:
Request the MAC address of the product
Return String:
mac=############$
Return Description:
MAC address (uppercase characters)
Example:
mac=0CEFAF90125E$
Command:
model?
Description:
Request the model number
Return String:
model=text$
Return Description:
Rotel model number
Example:
model=a12$ Command:
discover?
Description:
Request the device to identify itself on the network
Return String:
discover=ip=###.###.###.### port=#### mac=############$
Return Description:
Device’s IP address, port number and MAC address
Example:
discover=ip=192.168.100.25 port=9596 mac=0cefaf90125e$
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