Zennio AudioInRoom User manual

AudioInRoom
KNX controller for audio with Bluetooth
and auxiliary input –4 outputs
ZMU-AUIR
USER MANUAL
dsñkmfroi
Application Program Version: 1.2
User manual edition: [1.2]_b
www.zennio.com

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CONTENTS
Contents........................................................................................................................................ 2
Document updates........................................................................................................................ 3
1. Introduction............................................................................................................................ 4
1.1 AudioInRoom ................................................................................................................... 4
1.2 Audio Playback System .................................................................................................... 5
1.3 InstalLation....................................................................................................................... 7
1.4 Bluetooth Connection...................................................................................................... 9
1.4.1 Check-in / Check-out ................................................................................................. 9
1.4.2 Pairing........................................................................................................................ 9
1.5 Inicialization and power tension.................................................................................... 11
2. Configuration........................................................................................................................ 12
2.1 General........................................................................................................................... 12
2.2 Bluetooth Audio Module................................................................................................ 13
ANNEX I. Communication Objects............................................................................................... 23

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DOCUMENT UPDATES
Version
Changes
Page(s)
[1.2]_b
Changes in the document:
•Warning: Some functionalities are only supported for
serial numbers from 20ACC0494 on.
-
[1.2]_a
Changes in the application programme:
•Pairing Time is increased up to 3 minutes.
•Sending status objects after power tension.
•New track information objects.
•Setting auxiliary input or Bluetooth streaming as the
priority source for playback control.
•Two additional tones: Welcome and Wake Up (only
supported from serial number 20ACC0494 on).
•Room State Control: “No dot disturb”for muting the
Ring and Welcome Tones.
•Ckech-in/out protection improved.
9
11
13, 18
13, 18
15, 19
15, 20
[1.1]_a
Changes in the application programme:
•New pairing PIN generation modes.
•Resetting the volume value when switching audio
source device.
•Check-in/out: process is not interrupted when receiving
a new order.
•New parameter to select the polarity of the mute object.
•New object to indicate the pairing mode status.
-

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1. INTRODUCTION
1.1 AUDIOINROOM
AudioInRoom from Zennio is KNX interface capable of playing audio from an external
device, such as a smartphone, which is connected via Bluetooth or through an auxiliary
input (for example, for televisions).
The most notable features of this device are:
Audio Playback from an external user device.
Audio Available Controls:
➢Play/Stop.
➢Next track/Previous track.
➢Volume.
Track Information.
Bluetooth/Auxiliary Input audio source selector.
Bluetooth pairing with configurable password.
Ring tone.
Two additional tones: Welcome and Wake Up.
Do not Disturb for Ring Tone and Ring Wake Up.
2 independent stereo channels of audio output.
Heartbeat or periodic “still-alive” notification.
Important Warning: Functionality marked in this document with a warning
icon is only supported from serial number 20ACC0494 on.

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1.2 AUDIO PLAYBACK SYSTEM
The following figure shows the main elements involved in the audio playback system
through AudioInRoom, either from an external Bluetooth source or from the Auxiliary
Input:
Figure 1. AudioInRoom playback system elements.
AudioInRoom: KNX system for audio playback from a device connected via
Bluetooth or through the auxiliary input. Enables Play/Stop, Next
track/Previous track and volume control through KNX bus.
Bluetooth Streaming: Bluetooth audio source linked to the KNX device by
means of a pairing with configurable password.
Auxiliary Input: AudioInRoom can also be connected to systems without
Bluetooth. This is possible thanks to the Auxiliary Input, using an analogue
audio connector (mini Jack) or a RCA connector. In these cases, the
playback control can only be carried out from the own user device audio
player.
External Supply
24 VDC
KNX Bus
Bluetooth
Streaming
Auxiliary Input
Audio Outputs

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Audio Outputs: two independent channels with two connectors each for
speakers, which can be enabled or disabled individually. The audio output
signal from each channel can be configured to be played in stereo or mono
mode.

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1.3 INSTALLATION
AudioInRoom is connected to the KNX bus through the built-in terminal (2). This device
requires an external 24V DC power supply (1).
Figure 2. AudioInRoom.
A short press in Programming Button (4) will make the device enter the programming
mode. The Programming LED (3) will then light in red. On the contrary, if this button is
held while the device gets connected to the bus, AudioInRoom will enter the safe
mode. In such case, the programming LED will blink in red colour.
Moreover, a 3 seconds press in Testing Button (8) turns the Bluetooth module on and
sets the device into pairing mode. The Testing LED (9) will light:
In blue when the Bluetooth module is on.
In green when pairing is active.
Flashes red in the absence of KNX bus voltage, blending with the other
colours if several notifications are made at the same time.
If a device without a Bluetooth module is to be connected, it must be connected via the
audio auxiliary input (6). Figure 3 shows the correct AudioInRoom auxiliary input
connection, depending on whether a Jack analogue audio connector or an RCA
connector is used:
1. 24VDC Power Supply.
2. KNX Connector.
3. Programming LED.
4. Programming Button.
5. Not used.
6. Audio Auxiliary Input.
7. Ventilation Grill.
8. Testing Button.
9. Testing LED.
10. Audio Output Channels.
44,25
144,26
22,71
3
2
5
3
6
1
4
7
8
9
10
1
2
3
4
5
6
7
8
9
10

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Figure 3. Auxiliary Input: Jack connector (left) and RCA connector (right).
Once the AudioInRoom is connected to an audio source, the processed audio output
will take place through the audio output channels (10). Two independent channels
with two connectors each for the speakers are available.
The following figure shows how to connect the audio output channels:
Figure 4. Audio Output Channels.
For detailed information about the technical features of the device and for safety
instructions or about the installation process, please refer to the corresponding
Datasheet, bundled with the original package of the device and also available at
www.zennio.com.

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1.4 BLUETOOTH CONNECTION
AudioInRoom connection with an audio source device through the Bluetooth module is
a simple procedure that maintains connection security at all times when carried out
using a configurable password.
1.4.1 CHECK-IN / CHECK-OUT
The' Check-in' process represents the arrival of a new user to the room and establishes
a new identifier name for the AudioInRoom and a new password or PIN to link to it.
These two values are set by communication object.
Instead, the Check-out process resets the name and password to the default
(parameter) settings. In addition, the list of devices linked to AudioInRoom is deleted,
so that any user who wants to reconnect to AudioInRoom must repeat the pairing
process.
The Check-in or Check-out processes will not be interrupted by the arrival of new
Check-in or Check-out orders. Once finished, the last order received is analysed and, if
it is the opposite than the process just finished, the pertinent actions will be executed.
1.4.2 PAIRING
The pairing process is initiated in AudioInRoom by sending the order via the
corresponding communication object or by pressing (more than three seconds) the test
button.
Once the pairing mode is activated, the AudioInRoom will remain visible via Bluetooth
for approximately 3 minutes . It can be identified by the name established in the
Check-In process or by the name established by parameter in ETS.
When selecting the desired AudioInRoom to connect to, the pairing PIN is requested.
This PIN, again, may be the one established in the Check-in process or the one
established by parameter in ETS.
For serial numbers prior to 20ACC0494 the time it will remain visible will be 1
minute.

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After entering the PIN, the audio source device and AudioInRoom will be paired and
connected:
Connected Device: the device has already been paired through the security
PIN and it is connected to AudioInRoom. At this point the sound from the
device will be heard through the speakers connected to the AudioInRoom
audio output channels. In addition, playback and volume controls can be used
from the AudioInRoom
Paired Device: the device has already been paired through the security PIN.
However, the audio-multimedia connection has been disabled. AudioInRoom
does not allow the user to play music in this state.
AudioInRoom enables to have up to two devices paired and connected, so that audio
can be played from any of them, although, logically, not at the same time. When the
device playing the audio changes, the volume of the AudioInRoom is reset to the initial
value set by parameter.
If a third device is paired, one of the two previous devices will be deleted, which means
that it will have to be paired again if it wants to reconnect.
Note: If a pairing process starts while a Bluetooth device is playing music, and it is not
successful (cancellation, incorrect PIN or time exceeded), the playback will pause.

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1.5 INICIALIZATION AND POWER TENSION
After a programming, a Check-out procedure is executed, which will also update the
Bluetooth module with PIN and device name values set by parameter.
With a power failure, the Bluetooth connection gets lost. This causes the source device
playback gets stopped. AudioInRoom has been designed so that audio source
playback can be recovered in a known status.
On the other hand, a KNX bus power failure does not imply any change in the
device status since it has external power supply. The Testing LED will red flashing
for information.
After power tension, the following status objects are sent to the KNX bus:
[Audio] On/Off (Status)
[Audio] Check-in/Check-out (Status)
[Audio][BT] Name (Status)
[Audio] Aux. Input (Status)
[Audio] Channel X: Mute (Status)
[Audio] Channel X, Subchannel A: Mute (Status)
[Audio] Channel X, Subchannel B: Mute (Status)
[Audio] Channel X: Volume Limit (Status)
[Audio] Channel X: Volume Limit Value (Status)
[Audio] Channel X: Volume (Status)
[Audio] Channel X, Subchannel A: Volume (Status)
[Audio] Channel X, Subchannel B: Volume (Status)
[Audio] Channel X: Alarm (Status)
[Audio] Alarm: Overheating (Status)
[Audio] Title of the Track
[Audio] Name of the Artist

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2. CONFIGURATION
After importing the corresponding database in ETS and adding the device into the
topology of the desired project, the configuration process begins by entering
Parameters tab of the device.
2.1 GENERAL
From this screen the two main functions of AudioInRoom, Heartbeat and Bluetooth
Module, can be enabled.
ETS PARAMETERISATION
The configurable parameters on the General screen are the following:
Figure 5. General Configuration.
Heartbeat (Periodic Alive Notification) [disabled/enabled]
1
: incorporates a
one-bit object to the project (“[Heartbeat] Object to Send ‘1’”) that will be
sent periodically with a value of “1” to notify that the device is still working (still
alive).
Figure 6. Heartbeat (Periodic Alive Notification).
Note: The first sending after download or bus failure takes place with a delay
of up to 255 seconds, according to the individual address, to prevent bus
overload. The following sendings match the period set.
1
The default values of each parameter will be highlighted in blue in this document, as follows:
[default/rest of options].

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Bluetooth Audio Module [enabled]: Bluetooth module is the main
functionality of the AudioInRoom and is enabled permanently. For more
information, see section 2.2.
2.2 BLUETOOTH AUDIO MODULE
All aspects of the Bluetooth module are configured from this tab:
Device Name: customizable name for easy AudioInRoom identification while
searching and pairing devices via Bluetooth.
PIN: parameterisable four-digit numeric value allowing secure connection and
pairing with authorized user devices.
Track Information: Enable the title of the track and the name of the artist.
This functionality is exclusive of Bluetooth module.
Auxiliary Input: enables music playback from a wired audio source, without
Bluetooth connection.
A choice can be made whether the auxiliary input has priority over Bluetooth
streaming or vice versa. Thus, the playback control can only be carried out
from the own priority user device audio player.
Playback Channels: audio output channels. AudioInRoom has two
independent stereo channels with two setup options for audio playback mode:
➢Stereo: each of two tracks which form the audio signal is played through
one of the speakers (or subchannels), recreating a more natural listening
experience.
➢Mono: the two tracks sound together through each speaker (or
subchannel) and it is possible even disconnecting one of these speakers
without altering the audio output.
Playback control using KNX objects. There are two controls:
➢Play/Stop: starts and pauses the audio playback of user device.
➢Skip: plays the next track or plays back the previous one.

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Volume Control. AudioInRoom volume control depends directly on the
Bluetooth of the device connected. Thus, three different volume controls are
possible:
➢Device Volume Control: audio player volume control of the user device.
➢AudioInRoom Volume Control: volume control of amplifiers of
AudioInRoom, by means of a communication object.
➢[Device + AudioInRoom]:
•Bidirectional behaviour: that makes that the signal volume of both
amplifiers will be modified directly from the user device. Thus, when a
volume command is sent through the communication object to the
AudioInRoom, the user device audio player volume will be modified in
the same way. iOS devices typically work with bidirectional
communication.
•Unidirectional behaviour: user device does not directly change the
AudioInRoom volume. Simply it applies the percentage of its volume to
the AudioInRoom volume, however both volumes are not
synchronised. Android devices typically work with unidirectional
communication.
Bidirectional behaviour:
- AudioInRoom volume = 80%
- User device volume changes to 20%
 [Device + AudioInRoom] Volume: = 20%
Unidirectional behaviour:
- AudioInRoom volume = 80%
- User device volume changes to 20%
 [Device + AudioInRoom] Volume: = 16%
Note: In some Android devices, in advanced Bluetooth settings, there is a
parameter called "Volume Synchronization" that, when activating, enables
bidirectional communication.

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Regardless of the devices connected via Bluetooth, AudioInRoom can
configure the following controls:
➢Initial Volume: volume that will be set on each channel and/or subchannel
after programming or a power loss. It is also the initial volume when the
sound is played from the auxiliary input.
➢Volume Limitation: maximum value for the output volume of each
amplifier. The real output volume will be the result of adjusting the volume
established by the user [0-100%] to the configured limit value, as follows:
[Limit] = 50%, [Control Volume] = 50%  [Output Volume] = 25%
[Limit] = 60%, [Control Volume] = 60%  [Output Volume] = 36%
[Limit] = 60%, [Control Volume] = 50%  [Output Volume] = 30%
However, this limitation is transparent to the user. In other words, the value
of the volume control object is shown on the bus in any case.
Mute audio output: it is possible to mute the output volume in each channel
and/or subchannel by communication object.
Tone: AudioInRoom has, in addition to Ring Tone, a Welcome and Wake
Up Tone . These three ringtones emit a beep through the speakers that will
sound even when the Bluetooth module is off.
Mute tones: AudioInRoom can control whether or not the Ring Tone and the
Welcome Tone sounds depending on the state of the room.
Alarms: AudioInRoom provides three high temperature warning alarms, one
for each channel and one for the device itself.
When an alarm occurs, audio playback is stopped. To deactivate the alarm, it
is necessary to correct the problem that generates it (probably a connection
error) and unfreeze it. The object for unfreezing the alarms is common to all
of them.
For serial numbers prior to 20ACC0494 the welcome and wake up tones are
not supported.

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ETS PARAMETERISATION
After enabling the Bluetooth audio module in the “General” screen (see section 2.1), a
new tab will be incorporated into the tab tree on the left. The parameters available for
configuring the Bluetooth module can be found in the “Configuration” subtab:
Figure 7. Audio Bluetooth Module Configuration.
On/Off Object [enabled/disabled]: enables or disables the 1-bit object
"[Audio] On/Off" which switch on / off the Bluetooth module.
Moreover, the Bluetooth module status can be checked by reading the 1-bit
object “[Audio] On/Off (Status)”.

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Device Name [Zennio AiR]: default name of the Bluetooth module to identify
the AudioInRoom when pairing. This is the name set when a Check-out
process is performed.
➢Device Name Change Object [enabled/disabled]: when enabled, it is
possible to change the name of the device through the 14-bytes object
“[Audio][BT] Name”. The name saved in this object can be checked by
reading the 14-bytes objects “[Audio][BT] Name (Status)”. This is the
name set when a Check-in process is performed.
Note: the status object "[Audio][BT] Name (status)" does not always
indicate the current device name; it indicates the name that has been
recorded in the object "[Audio][BT] Name" and that will be set on the
device by Check-in.
Pairing PIN Generation Mode:
➢[Default]: the PIN for the Bluetooth pairing is always 0000.
➢[Random]: every time a check-in is made a random PIN is generated to be
used during Bluetooth pairing, while with a check-out the PIN is restored to
its default value.
➢[Custom]: sets a PIN value by parameter, as well as the possibility of
changing the PIN at runtime via the “[Audio][BT] PIN”object.
➢PIN [0000…9999]: PIN value (default or custom, depending on the option
selected above) of the Bluetooth module for device pairing. This is the PIN
set when a Check-out process is performed.
➢PIN Object [enabled/disabled]: enables the 14-bytes object “[Audio][BT]
PIN” to modify the PIN value. The PIN saved in this object can be checked
by reading the 14-bytes objects “[Audio][BT] PIN (Status)”. This is the
PIN set when a Check-in process is performed.
Notes:
•If a PIN outside the allowed range [0000-9999] is entered in the
"[Audio][BT] PIN" object:
oIf it is a numerical value, only the first 4 digits are taken.

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oIf it is not a numeric value, it is ignored and the PIN is updated to
the value set by parameter.
•In check-in state if the PIN is changed via the object “[Audio][BT]
PIN”, this PIN will be used for pairing, while in check-out state, if the
PIN is changed, it will be necessary to do a check-in for this change to
take effect.
Track Information: [enabled/disabled]: enables o disables the objects
“[Audio] Title of the Track” and “[Audio] Name of the artist”
Auxiliary Input [enabled/disabled]: enables o disables, using the 1-bit object
“[Audio] Aux. Input”, the audio reception through the auxiliary input. The
object “[Audio] Aux. Input (Status)” will indicate the status of that input.
Figure 8. Auxiliary Input Priority.
➢Priority [Auxiliary Input / Bluetooth]: sets which audio source, auxiliary
input or Bluetooth streaming, will have the control over playback if both
sources are active. So, when starting playback on the selected priority
device, the audio of the secondary source will be stopped until the
decoupling/disconnection of the first one is detected.
If the priority is assigned to the "Bluetooth" module, a new parameter will
be displayed:
•Aux Always Enabled [enabled/disabled]. If enabled, the auxiliary
input will always be active. The binary objects “[Audio] Aux. Input”
and “[Audio] Aux. Input (Status)” will not be needed anymore.
Absolute [enabled]: volume control for each channel and/or subchannel
through the 1-byte object “[Audio] Channel X: Volume Absolute” and/or
“[Audio] Channel X, Subchannel Y: Volume Absolute”, depending on
whether the channel configuration is stereo or mono, respectively.

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Relative Step [enabled/disabled]: step volume control for each channel
and/or subchannel through the 1-byte object “[Audio] Channel X: Volume
Relative Step” and/or “[Audio] Channel X, Subchannel Y: Volume
Relative Step”, depending on whether the channel configuration is stereo or
mono, respectively.
➢Step Size [100% / 50% / 25% / 12.5% / 6.25% / 3.1% / 1.5%]: value by
which the volume of each channel and/or subchannel will increase or
decrease when sending, respectively, “1” or “0” via the previous objects.
Relative [enabled/disabled]: gradual volume control according to the step
size received by the 4-bit object “[Audio] Channel X: Volume Relative
Control” and/or “[Audio] Channel X, Subchannel Y: Volume Relative
Control”.
➢Speed [3…10] [s]: regulation speed to cover the entire control range
(0% ↔100%).
The state object “[Audio] Channel X: Volume (Status)” and/or “[Audio] Channel X,
Subchannel Y: Volume (Status)” will send the updated volume value each time a
change through any of the above volume controls occurs.
Mute Polarity [0 = Disable Mute; 1 = Enable Mute / 0 = Enable Mute; 1 =
Disable Mute]: sets the polarity of the object to mute the volume.
Ring Tone [enabled]: plays when a "0" or "1" is received through the 1-bit
object “[Audio] Ring Tone”
Welcome Tone [enabled/disabled]: plays when a "1" is received through
the 1-bit object “[Audio] Welcome Tone” and stops when a “0” is received.
Figure 9. Welcome Tone.
➢Number of Repetitions [1, 2]: chooses the number of times the tone will
be repeated.

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➢Polarity [0 = Stop; 1 = Play / 0 = Play; 1 = Stop]: sets the polarity of the
object for the Welcome Tone.
Wake Up Tone [enabled/disabled]: plays when a "1" is received through
the 1-bit object “[Audio] Wake Up Tone” and stops when a “0” is received.
Figure 10. Wake Up Tone.
➢Number of Repetitions [1…5…10]: chooses the number of times the
wake up tone will be repeated.
➢Polarity [0 = Stop; 1 = Play / 0 = Play; 1 = Stop]: sets the polarity of the
object.
Volume [0…100] [%]: volume of the ring, welcome and wake up tone.
Mute (Ring and Welcome Tone) [enabled/disabled]: controls whether or not
the sound of these tones will be muted depending on the room state.
Figure 11. Mute ring and welcome tone.
➢Type [1 bit / Room State]: sets whether the ring and welcome tones will be
muted via a 1-bit “[Audio] Mute Tone” or 1-byte “[Audio] Room State”
object.
For serial numbers prior to 20ACC0494 the welcome and wake up tones are not
supported.