Elvaco Sense 100W User manual

Elvaco Sense User’s Manual English
Elvaco Sense
Wireless M-Bus Indoor Sensors
100W, 200W, 300W
User’s Manual
English
v1.0

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Contents
1DOCUMENT NOTES .....................................................................................................4
1.1 COPYRIGHT AND TRADEMARK.........................................................................................4
1.2 CONTACTS.....................................................................................................................4
2IMPORTANT USAGE AND SAFETY INFORMATION...................................................5
3USING THIS MANUAL ..................................................................................................6
3.1 PURPOSE AND AUDIENCE ...............................................................................................6
3.2 ONLINE RESOURCES ......................................................................................................6
3.3 SYMBOLS.......................................................................................................................6
4INTRODUCTION............................................................................................................7
4.1 PURPOSE....................................................................................................................... 7
4.2 APPLICATION DESCRIPTION.............................................................................................7
4.3 PRODUCT FEATURES......................................................................................................7
4.4 COMPATIBILITY...............................................................................................................8
5GETTING STARTED......................................................................................................9
5.1 PURPOSE....................................................................................................................... 9
5.2 PRODUCT SPECIFICATION...............................................................................................9
5.3 MOUNT THE DEVICE........................................................................................................9
5.3.1 Mounting...................................................................................................................... 9
5.4 OPERATION.................................................................................................................. 11
5.4.1 Configuration using the OTC App ............................................................................. 11
5.4.2 Configuration settings................................................................................................ 11
5.4.2.1 LED flash ...........................................................................................................11
5.4.3 Transmit interval........................................................................................................ 11
5.4.4 Wireless M-Bus mode............................................................................................... 12
5.4.5 Encryption mode ....................................................................................................... 12
5.4.6 Configuration lock...................................................................................................... 12
5.4.7 CO2 Calibration.......................................................................................................... 12
6PROTOCOL SPECIFICATION.....................................................................................13
6.1 PURPOSE..................................................................................................................... 13
6.2 M-BUS PRODUCT IDENTIFICATION................................................................................. 13
6.3 WIRELESS M-BUS MODE ..............................................................................................13
6.4 ENCRYPTION MODE...................................................................................................... 13
6.5 TRANSMISSIONS........................................................................................................... 13
6.5.1 Telegram description of Elvaco Sense 100W ........................................................... 13
6.5.2 Telegram description of Elvaco Sense 200W ........................................................... 14
6.5.3 Telegram description of Elvaco Sense 300W ........................................................... 15
7TROUBLESHOOTING.................................................................................................17
7.1 THE WIRELESS M-BUS RECEIVER DOES NOT RECEIVE ANY TELEGRAM FROM THE SENSOR
17
7.2 TEMPERATURE VALUE IS INACCURATE...........................................................................17
8TECHNICAL SPECIFICATIONS..................................................................................18
8.1 CHARACTERISTICS .......................................................................................................18
8.2 FACTORY DEFAULT SETTINGS....................................................................................... 19

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8.3 DIMENSIONS (MM)........................................................................................................ 19
9TYPE APPROVALS.....................................................................................................20
10 DOCUMENT HISTORY................................................................................................21
10.1 VERSIONS....................................................................................................................21

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1 Document notes
All information in this manual, including product data, diagrams, charts, etc. represents information on
products at the time of publication, and is subject to change without prior notice due to product
improvements or other reasons. Latest product information can be downloaded from Elvaco AB public
web site.
The documentation and product are provided on an “as is” basis only and may contain deficiencies or
inadequacies. Elvaco AB takes no responsibility for damages, liabilities, or other losses (direct or indirect)
by using this product.
1.1 Copyright and trademark
© 2023, Elvaco AB. All rights reserved. No part of the contents of this manual may be transmitted or
reproduced in any form by any means without the written permission of Elvaco AB. Printed in Sweden.
The Elvaco Sense is a trademark of Elvaco AB, Sweden.
1.2 Contacts
Elvaco AB Headquarter
Kabelgatan 2T
434 37 Kungsbacka
SWEDEN
Phone: [phone]
E-Mail: [email protected]
Elvaco AB Technical Support
Phone: [phone]
E-Mail: [e-mail]
Online: http://www.elvaco.com

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2 Important usage and safety information
The following safety precautions must be observed during all phases of the operation, usage, service or
repair of any Elvaco Sense product. Users of the product are advised to convey the information to users
and operating personnel and, to incorporate these guidelines into all manuals supplied with the product.
Failure to comply with these precautions violates safety standards of the design, manufacture and
intended use of the product. Elvaco AB assumes no liability for customer’s failure to comply with these
precautions.
The installation of Elvaco Sense product should not be started before the information in this manual is
completely understood. The installation must follow applicable regional regulations and be performed by
qualified personnel.
To use the product's NFC functionality, follow the instructions issued by the manufacturer of the NFC
reader for safe and efficient operation.
The labelling of the product should not be changed, removed or made unrecognizable.

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3 Using this manual
3.1 Purpose and audience
This manual provides all information needed to mount, configure and use the Elvaco Sense 100W-300W
Wireless M-Bus Sensors. The manual is intended for field engineers and integrators.
3.2 Online resources
To download the latest version of this user’s manual, or to find information in other languages, please
visit http://www.elvaco.com/.
3.3 Symbols
The following symbols are used throughout the manual to emphasize important information and useful
tips:
The Note symbol is used to mark information that is important to take into consideration for
safety reasons or to assure correct operation of the product.
The Tip symbol is used to mark information intended to help you get the most out of your
product. It can for example be used to highlight a possible customization option related to the
current section.
Table 1 provides information on how the product should be installed and recycled.
Symbol
Description
Waste electrical products should not be disposed of with household waste. Please recycle
where facilities exist. Contact your Local Authority for recycling advise.
Electrostatic-sensitive device. Please observe the necessary ESD protective measures
when installing the product.
Table 1: Installation and recycling information

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4 Introduction
4.1 Purpose
This chapter provides a general description of the Elvaco Sense sensors. In the next-coming sections
you will learn more about possible applications for the product and how Elvaco Sense sensors can be
combined with other products to build versatile solutions.
4.2 Application description
The Elvaco Sense is a smart wireless M-Bus sensor solution with the ability to precisely measure CO2,
temperature and humidity. It’s equipped with replaceable batteries and made for indoor use. The
Scandinavian minimalist design makes it suitable in homes, offices and public spaces.
The sensor automatically starts to transmit wireless M-Bus telegrams as soon as the replaceable
batteries are installed. Using the Elvaco OTC smartphone app, the sensor can be commissioned to suite
various wireless M-Bus installations following the OMS standard. The user has the ability to change
different settings such as transmit interval, encryption mode and wireless m-bus mode. The Elvaco OTC
app can also be used to verify that the sensor is operational before leaving the installation site.
Following figure shows an example of how the Elvaco Sense can be used in an Elvaco end-to-end
solution.
4.3 Product features
Key features of the Elvaco Sense series include:
•IoT-ready
As soon as the sensor has been mounted and started up, it will automatically initiate transmission
of sensor data without any manual steps needed. The sensor is prepared for seamless
integration with all wireless M-Bus receivers following the OMS standard.
•Long battery lifetime
The sensor is designed with replaceable batteries, which extends the product lifetime. The
sensor is also designed to be energy efficient to enable up to 16 years of battery lifetime.
•Easy and fast commissioning
The Elvaco OTC app is used to configure and deploy sensors quickly and securely. Using the
Elvaco OTC app, simply enter your desired settings and place your smartphone on the sensor.
Figure 1 Application example

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New settings will be applied instantaneously using NFC.
•High accuracy
The sensors are equipped with the latest sensor technology giving best possible accuracy of its
lifetime.
4.4 Compatibility
The Elvaco Sense series is OMS 4.0 compatible and can be used with any wireless M-Bus
receiver following the OMS standard with the following configuration:
•Frequency 868.95 MHZ
•Encryption mode 0 or 5
•Wireless M-Bus mode C1a, C1b or T1

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5 Getting started
5.1 Purpose
This chapter provides instructions on how to get started with the Elvaco Sense sensors. After reading and
carefully following each step of this chapter, your sensor will be installed and operational.
5.2 Product specification
5.3 Mount the device
5.3.1 Mounting
1. Remove the back panel of the sensor by gently prying the tab with a small screwdriver.
1. NFC antenna placement
2. LED
3. Serial number
Figure 3: Elvaco Sense front
Figure 2: Elvaco Sense side

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2. Install the 3.6V lithium battery/batteries (ER14505). Ensure that the plus and minus poles are
facing the right direction. Upon installation the sensor will activate which is indicated by a long
red flash followed by a long green flash.
3. Use any of the four mounting holes to mount the back panel to the wall. At least two appropriate
screws should be used. Alternatively attach the sensor with double sided adhesive tape.
Caution: Using batteries other than the ones provided may result in loss of performance,
battery life and damage to the device.
Avoid mounting the product near supplementary heat sources, such as kitchen stoves or in
direct sunlight.
Make sure to mount the product at least 1.5 meters above the floor and at least 1 meter
from nearest radiator.
Do not mount the product on an external wall or near a door. If mounted over a conduit pipe,
make sure that the pipe is filled to prevent air flow.
Do not mount the sensor in a steel cabinet. Doing so will dramatically decrease the signal
coverage.

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4. Attach the sensor part by hinging it on the back panel.
5.4 Operation
Upon installation of the batteries, the sensor will begin to transmit wireless M-Bus telegrams. The
telegrams contain sensor data as well as various information about the product status. The Elvaco Sense
are equipped with an NFC antenna, which can be used to configure settings or to read data using a
smartphone. To read the current sensor values in the Elvaco OTC app, scan the sensor twice within 30
seconds. The first scan will wake up the sensor and collect the current sensor values.
5.4.1 Configuration using the OTC App
Download the Elvaco OTC app from Google Play or App Store to a smartphone. The smartphone must
support NFC.
5.4.2 Configuration settings
For configuration settings on the Elvaco Sense, press SCAN in the OTC app and hold the smartphone on
top of the NFC antenna of the sensor. Select APPLY in the OTC app and change the settings for a
customized sensor experience.
5.4.2.1 LED flash
For successful configuration settings the LED will flash blue.
For Automatic Baseline Calibration On / Off the LED will begin to flash red and then continue to flash
green.
For Fresh Air Calibration the LED will flash green.
5.4.3 Transmit interval
The transmit interval of the wireless M-Bus telegram can be set between one and fifteen minutes.
Note: Change of transmit interval will affect the battery lifetime.
OTC app on Android
OTC app on IPhone

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5.4.4 Wireless M-Bus mode
Elvaco Sense has three different wireless M-Bus modes; C1a, C1b and T1.
5.4.5 Encryption mode
The Elvaco Sense wireless M-Bus telegram can be encrypted using mode 5 by selecting Yes in the line
wM-Bus encryption enabled.
5.4.6 Configuration lock
The Elvaco Sense can be secured by disabling the possibility of applying configuration without having
access to the Product Access Key (PAK). By enabling setup lock the sensor can only be configured or
unlocked by a user having access to the PAK. Elvaco recommend enabling the setup lock during installation
to secure the device for unwanted re-configuration.
To unable setup lock use the sensor key found in elvaco.evo portal. Upon delivery the customer will
receive an invitation to the elvaco.evo portal via email, triggered by Elvaco.
5.4.7 CO2 Calibration
Elvaco Sense has a self-correcting calibration algorithm, Automatic Baseline Calibration (ABC). The ABC
uses the lowest sensor value over the last eight days and uses it as a baseline value corresponding to
400 ppm. For this to work correctly, the sensor must be exposed to well-ventilated air at least once every
eight days. The ABC needs approximately one month to calibrate the sensor before being able to provide
correct values.
The ABC is activated by default, and it can show incorrect values due to mechanical stress from
transportation. Calibration can be done manually which will instantly calibrate the sensor. This process
can be triggered using the Elvaco OTC app and placing the sensor in well-ventilated air for at least 10
minutes.
If the sensor is placed in a location where there are people constantly present, the recommendation is to
turn the ABC calibration off and instead use the Elvaco OTC app and manually calibrate the sensor once
a year.

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6 Protocol specification
6.1 Purpose
This chapter contains the protocol specifications of the Elvaco Sense 100W, 200W and 300W. The
wireless M-Bus implementation is according to M-Bus standards EN13757:2018
6.2 M-Bus product identification
The product can be identified using the following information:
•Manufacturer string = ELV
•Medium = 0x1B (Room sensor)
The M-Bus Generation field between product releases will only change (increase by one) if the M-Bus
protocol information changes between sensor versions.
6.3 Wireless M-Bus mode
The product uses wireless M-Bus mode C1a (default), C1b or T1 which means that it sends spontaneous
data in one direction, from sensor to wireless M-Bus receiver.
6.4 Encryption mode
The product supports both unencrypted and encryption mode 5. In encrypted mode, an AES 128-bit
algorithm is used to encrypt all transmitted data from the sensor. In unencrypted mode, no data will be
encrypted.
6.5 Transmissions
The product will automatically begin transmitting data after the batteries are inserted. By default, a
SND_NR telegram will be transmitted according to the tables; Table 2, Table 3, Table 4.
6.5.1 Telegram description of Elvaco Sense 100W
Description of Elvaco Sense 100W –wM-Bus indoor temperature sensor
Byte index
Data
Description
0
0xnn
L-Field
1
0x44
C-Field: SND_NR
2..3
0x9615
Manufacturer “ELV”
4..7
0xnnnnnnnn
Identification number
8
0xnn
Version field: 80d..84d
9
0x1B
Device type (Medium) = Room sensor
10
0x7A
0x7A = short application header
11
0xnn
Access number, increases after each transmission
(0…255)
12
0xnn
Status
No Error: 0x00
Any Error: 0x10
13..14
0xnnnn
CONFIG:
Bit 3..0 = 0
Bit 7..4 = 1 to 15, number of encrypted 16-byte block, 0 if

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Byte index
Data
Description
encryption = OFF
Bit 12..8 = encryption mode, 5 with encryption, 0 without
encryption
Bit 13=1 (synchronized)
Bit 15..14 = 0
15..16
0x2f2f
AES check (idle filler)
Only if encrypted
17
0x02 (0x32 in case of error)
Instantaneous DIF
18
0xFD
VIF, extension table FD
19
0x46
VIFE, battery voltage in mV
20..21
0xnnnn
Instantaneous battery voltage
In case of error this value will be set to 0.
22
0x02 (0x32 in case of error)
Instantaneous DIF
23
0x65
VIF, external temperature
24..25
0xnnnn
Instantaneous temperature x 100
In case of error this value will be set to 0.
Table 2: Telegram description of Elvaco Sense 100W
6.5.2 Telegram description of Elvaco Sense 200W
Description of Elvaco Sense 200W –wM-Bus indoor temperature and humidity sensor.
Byte index
Data
Description
0
0xnn
L-Field
1
0x44
C-Field: SND_NR
2..3
0x9615
Manufacturer “ELV”
4..7
0xnnnnnnnn
Identification number
8
0xnn
Version field: 85d..89d
9
0x1B
Device type (Medium) = Room sensor
10
0x7A
0x7A = short application header
11
0xnn
Access number, increases after each transmission
(0…255)
12
0xnn
Status
No Error: 0x00
Any Error: 0x10
13..14
0xnnnn
CONFIG:
Bit 3..0 = 0
Bit 7..4 = 1 to 15, number of encrypted 16-byte block, 0 if
encryption = OFF
Bit 12..8 = encryption mode, 5 with encryption, 0 without
encryption
Bit 13=1 (synchronized)
Bit 15..14 = 0
15..16
0x2f2f
AES check (idle filler)
Only if encrypted
17
0x02 (0x32 in case of error)
Instantaneous DIF
18
0xFD
VIF, extension table FD
19
0x46
VIFE, battery voltage in mV

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Byte index
Data
Description
20..21
0xnnnn
Instantaneous battery voltage
In case of error this value will be set to 0.
22
0x02 (0x32 in case of error)
Instantaneous DIF
23
0x65
VIF, external temperature
24..25
0xnnnn
Instantaneous temperature x 100
In case of error this value will be set to 0.
26
0x02 (0x32 in case of error)
Instantaneous relative DIF
27
0xfb
VIF, extension table FB
28
0x1a
Instantaneous relative humidity VIFE
29..30
0xnnnn
Instantaneous relative humidity x 10
In case of error this value will be set to 0.
Table 3: Telegram description of Elvaco Sense 200W
6.5.3 Telegram description of Elvaco Sense 300W
Description of Elvaco Sense 300W –wM-Bus indoor CO2 multi sensor.
Byte index
Data
Description
0
0xnn
L-Field
1
0x44
C-Field: SND_NR
2..3
0x9615
Manufacturer “ELV”
4..7
0xnnnnnnnn
Identification number
8
0xnn
Version field: 90d..94d
9
0x1B
Device type (Medium) = Room sensor
10
0x7A
0x7A = short application header
11
0xnn
Access number, increases aftereach transmission
(0…255)
12
0xnn
Status
No Error: 0x00
Any Error: 0x10
13..14
0xnnnn
CONFIG:
Bit 3..0 = 0
Bit 7..4 = 1 to 15, number of encrypted 16-byte block, 0 if
encryption = OFF
Bit 12..8 = encryption mode, 5 with encryption, 0 without
encryption
Bit 13=1 (synchronized)
Bit 15..14 = 0
15..16
0x2f2f
AES check (idle filler)
Only if encrypted
17
0x02 (0x32 in case of error)
Instantaneous DIF
18
0xFD
VIF, extension table FD
19
0x46
VIFE, battery voltage in mV
20..21
0xnnnn
Instantaneous battery voltage
In case of error this value will be set to 0.
22
0x02 (0x32 in case of error)
Instantaneous DIF
23
0x65
VIF, external temperature

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Byte index
Data
Description
24..25
0xnnnn
Instantaneous temperature x 100
In case of error this value will be set to 0.
26
0x02 (0x32 in case of error)
Instantaneous relative DIF
27
0xfb
VIF, extension table FB
28
0x1a
Instantaneous relative humidity VIFE
29..30
0xnnnn
Instantaneous relative humidity x 10
In case of error this value will be set to 0.
31
0x02 (0x32 in case of error)
Instantaneous value, 16-bit DIF
32
0x7C
Plain-text VIF
33
0x03
Length of plain-text VIF
34
0x32
'2'
35
0x4F
'O'
36
0x43
'C'
37..38
0xnnnn
Value [ppm]
In case of error this value will be set to 0.
Table 4: Telegram description of Elvaco Sense 300W

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7 Troubleshooting
7.1 The Wireless M-Bus receiver does not receive any telegram from
the sensor
Please verify that:
•The sensor has been activated.
•The receiver is connected to a power source and is correctly configured.
•The receiver is within range of the radio signal.
•The receiver antenna is mounted properly.
•The receiver and the sensor use the same wireless M-Bus mode (C1a).
•The sensor is not mounted inside a metallic cabinet.
•The sensor is not disturbed by other radio equipment.
•The sensor battery voltage is in operating condition. Use Elvaco OTC app (NFC) to verify.
•If the meter value does not show up in the Elvaco OTC App after a second scanning the sensor
is not powered.
7.2 Temperature value is inaccurate
Although the data collected by the temperature sensor is accurate, an incorrect positioning of the product
can sometimes result in unintended temperature variations. When mounting the sensor, please verify
that:
•The sensor is not mounted near any heat and cold sources.
•The sensor is not mounted in direct sunlight.
•The sensor is not mounted in a spotlight beam.

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8 Technical specifications
8.1 Characteristics
Type
Value
Unit
Comments
Mechanics
Casing material
ABS UL94-V0
-
White
Protection class
IP20
-
Dimensions
76.2x76.2x22.5
mm
Weight
60
g
Excluding batteries
Mounting
Wall-mount
-
Electrical
Power supply
Lithium Battery
-
Removable
Battery type
ER14505
-
Battery size
AA
-
Operating voltage
3.6
V
Environmental
Operating temperature
0 –50
°C
Operating humidity
0 –85
%RH
No condensation
Operating altitude
0-2000
m
Pollution degree
Degree 2
-
Usage environment
Indoor
-
Storage temperature
-40 –85
°C
Sensor characteristics
Temperature range
0 –50
°C
Temperature accuracy
± 0.2
°C
Humidity range
0 - 85
%RH
Humidity accuracy
± 2
%RH
CO2range
400 –10 000
ppm
CO2accuracy
± 30
ppm
At 400-5000 ppm, ± 3% of reading (15-35 °C,
0-80% RH)
CO2accuracy
± 10
ppm
At 5001-10000 ppm, ± 10% of reading (15-35
°C, 0-80% RH)
User interface
LED
Activation
-
App support
Elvaco OTC
-
Using NFC
Wireless M-Bus
Frequency
868.95
MHz
Transmit power
25
MW
Transmit interval
According to Table 6
min
Encryption
Yes/No
-
Mode 5 or 0

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Wireless M-Bus modes
C1a/C1b/T1
-
C1a (default)
Wireless M-Bus Standard
EN13757:2018
-
OMS Standard
4.0
-
Table 5: Technical specifications
8.2 Factory default settings
Sensor
Function
Value
Elvaco Sense 100W
Transmit interval
3 min
Elvaco Sense 200W
Transmit interval
6 min
Elvaco Sense 300W
Transmit interval
15 min
Elvaco Sense 300W
Automatic Baseline Calibration
On
Elvaco Sense series
Wireless M-Bus mode
C1a
Elvaco Sense series
Encryption mode
Off
Elvaco Sense series
Setup lock
No
Table 6: Factory default settings
8.3 Dimensions (mm)
Figure 4 Dimensions

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9 Type approvals
The Elvaco Sense series is designed to comply with the directives and standards listed below.
Approval
Description
EMC
2014/30/EU
RED
2014/53/EU
LVD
2014/35/EU
REACH
2011/65/EU + 2015/863
Table 7: Type approvals