A: The device and its parts should not be disposed of with
household or industrial waste. Contact certified disposal service
providers for proper disposal according to RoHS directives.

Q: What type of battery does the sensor contain?

A: The sensor contains a lithium battery that must be disposed
of separately from the device.

“`

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Operating manual
Publish Date: 2025-04-29 v1.2

Wireless sensor

Operating manual
ERS Series LoRa

ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se
Specifications in this document are subject to change without notice. ©ElektronikSystem i Umeå AB 2022

Operating manual ERS series LoRa
Important safety information
Read this manual before attempting to install the device!
Failure to observe recommendations included in this manual may be dangerous or cause a violation of the law. The manufacturer, ElektronikSystem i Umeå AB will not be held responsible for any loss or damage resulting from not following the instructions of this operating manual.
· The device must not be dismantled or modified in any way. · The device is only intended for indoor use. Do not expose it to moisture. · The device is not intended to be used as a reference sensor, and
ElektronikSystem i Umeå AB will not be held liable for any damage which may result from inaccurate readings. · The battery should be removed from the device if it is not to be used for an extended period. Otherwise, the battery might leak and damage the device. Never leave a discharged battery in the battery compartment. · The device must never be subjected to shocks or impacts. · To clean the device, wipe with a soft moistened cloth. Use another soft, dry cloth to wipe dry. Do not use any detergent or alcohol to clean the device.
Disposal note in accordance with Waste from Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU
The device, as well as all the individual parts, must not be disposed of with household waste or industrial waste. You are obliged to dispose of the device at the end of its service life in accordance with the requirements of RoHS 2012/19/EU to protect the environment and to reduce waste through recycling. For additional information and how to carry out disposal, please contact the certified disposal service providers. The sensors contain a lithium battery, which must be disposed of separately.
ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
Contents
1. Description ……………………………………………………………………………………. 1 1.1 Dimensions (mm) …………………………………………………………………… 1 1.2 Label …………………………………………………………………………………….. 2 1.3 Main features of the ERS series LoRa…………………………………………. 3
2. Mounting guidelines ……………………………………………………………………….. 4 2.1 Motion PIR …………………………………………………………………………….. 4 2.2 Room occupancy sensor…………………………………………………………… 4 2.3 Sound level…………………………………………………………………………….. 4
3. Installation …………………………………………………………………………………….. 5 4. Service and maintenance…………………………………………………………………. 6 5. Sensor configuration……………………………………………………………………….. 7
5.1 NFC Configuration …………………………………………………………………… 7 5.2 Over the air configuration …………………………………………………………. 8 5.3 Application parameters …………………………………………………………….. 8 6. Sensor behavior …………………………………………………………………………….. 9 6.1 Sensor startup ………………………………………………………………………… 9 6.2 Sampling mode / Periodic measurement …………………………………….. 9 6.3 Scheduled transmission ……………………………………………………………. 9 6.4 LED indication ………………………………………………………………………. 10 7. Internal sensors ……………………………………………………………………………. 11
ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa 7.1 Temperature…………………………………………………………………………. 12 7.2 Humidity ………………………………………………………………………………. 12 7.3 Light……………………………………………………………………………………. 13 7.4 CO2 ……………………………………………………………………………………. 13 7.5 Motion PIR …………………………………………………………………………… 14 7.5.1 PIR Lens detection pattern………………………………………………………. 15 7.6 Room occupancy (ERS Eye LoRa) …………………………………………… 16 7.6.1 Detailed description………………………………………………………………….16 7.6.2 Special functions for ERS Eye LoRa ………………………………………… 16 7.7 Sound level…………………………………………………………………………… 17 7.8 VOC…………………………………………………………………………………….. 17
8. Device specifications …………………………………………………………………….. 18 9. Sensor payload format ………………………………………………………………….. 19 10. Regulations………………………………………………………………………………. 19
10.1 Legal Notices ……………………………………………………………………….. 19 10.2 Declaration of conformity………………………………………………………… 19 10.3 Federal Communication Commission Interference Statement ……….. 19 11. Revision History………………………………………………………………………… 21
ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
1. Description
The ERS series LoRa of sensors are universal LoRaWAN® indoor climate sensors. The sensor measures, depending on model, temperature, humidity, light intensity, CO2-level, sound-level, volatile organic compounds (VOC), occupancy and detects motion. ERS LoRa is a battery-powered device and is designed to be wall-mounted. The sensors are equipped with NFC (Near Field Communication) for easy configuration with an NFC-enabled smartphone.
1.1 Dimensions (mm)
LED Motion detector Light sensor
1 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
1.2 Label
At the back of your device there is a label with an Aztec barcode containing DevEUI and sensor type.
2 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
1.3 Main features of the ERS series LoRa
· Compatible with LoRaWAN® specification 1.0.4 · Measures ambient temperature · Measures ambient humidity · Measures light intensity* · Measures CO2 level* · Measures sound level* · Measures VOC level* · Detects room occupancy* · Detects motion using a passive IR sensor* · Indicates low, normal or high values with an LED light* · Easy installation · Easy configuration · May be installed on a wall or any (non-metallic) surface · Battery-powered · Long-range communication · Configurable over NFC · Configurable over the air · Ten years of battery life** · Supported channel plans: EU863-870, IN865, US902-928, AU915-
928, AS923, KR920-923, HK923 · CE Approved and RoHS compliant
* Depending on model
** Depending on settings and environmental factors
3 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
2. Mounting guidelines
Common mounting guidelines for ERS LoRa line of sensors:
· Place the sensor in an open space on the wall, with an installation height of 1.6 meters (does not apply to ERS Eye LoRa, see 4.2).
· For best RF and measurement performance, make sure you mount the sensor with the ventilation openings vertically. See installation in chapter 2.
· Make sure that the sensor is not placed in direct sunlight, close to heating vents, near windows, air ventilation where it may measure values that is not representative for the rest of the room.
2.1 Motion PIR
The PIR can self-trigger if sensors are placed too close to each other. Keep this in mind when you mount or test the sensors.
2.2 Room occupancy sensor
The Grid Eye sensor has an 8×8 temperature matrix with a field of view of 60° and a range of 5 meters for detecting humans. Keep this in mind when you place the sensor and make sure that you have enough sensors to cover your whole desired area. Preferably place the ERS Eye LoRa in the ceiling at between 2.2 to 5 meters height. Do not place the sensor so it faces windows or moving heat sources as this can cause a false positive reading.
2.3 Sound level
Think carefully about the placement of the ERS Sound LoRa. If the sensor is placed close to loud sources such as machines or ventilation, it will be reflected in the sensor readings due to sounds being louder close to the source.
4 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
3. Installation
1. Remove the back panel of the sensor by gently prying the tab with a small screwdriver.
2. Install the batteries. The ERS LoRa requires one or two AA batteries. The battery type is 3.6V Lithium Battery (ER14505). You can use one battery, but it’s recommended that you use two for best battery life. Use battery slot A if only one battery is used.
A B
Caution: Using batteries other than the ones provided may result in loss of performance, battery life, and also damage to the device. Dispose of properly, observing environmental protection rules.
5 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa 3. Mount the back panel securely to the wall with at least 2 appropriate screws, using some of the four mounting holes. Alternatively, attach the sensor with double sided adhesive tape.
4. Attach the sensor part by hinging it on the back panel.
4. Service and maintenance
No serviceable parts inside. If service is needed other than battery replacement, please contact your distributor.
6 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
5. Sensor configuration
All sensor settings can be configured via a smartphone application with NFC (Near Field Communication) or over the air via the network server and downlink data to the sensor. The sampling rate, spreading factor, encryption keys, port, and modes can be changed. All sensor settings can be locked from the server or NFC to make end-users unable to read or change settings on the sensor.
5.1 NFC Configuration
1. Download ELSYS “Sensor Settings” application from Google Play or App store and install it on a smartphone or tablet. The device must support NFC.
2. Enable NFC on the device and start the application. 3. Place your device on top of the NFC antenna on the sensor. Keep the two
devices close to each other and don’t move them to get as good connectivity as possible. 4. Remove the device. Current settings will be displayed in the application.
NFCantenna location
5. Use the application to change any settings if needed. 6. Tap the device on top of the NFC antenna to transfer the new settings to
the sensor. Make sure that the application confirms your new settings. 7. Wait for the sensor to reboot (1 sec), indicated by the LED flashing. Sensor
settings have been updated. Always validate your settings by reading the NFC data after the sensor has restarted.
7 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
5.2 Over the air configuration
All settings may be configured over the air via your LoRaWAN® infrastructure. Please visit the support section on our webpage for more information regarding downlink protocol.
5.3 Application parameters
All parameters for the “Sensor settings” application can be found in our settings document. Please visit the support section on our webpage for more information.
8 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
6. Sensor behavior
6.1 Sensor startup
1. When the sensor starts up it loads any configuration parameters written to the NFC chip. The sensor will then write all configuration parameters back to the NFC chip. 2. When the configuration is done the sensor tries to join the network if OTAA (Over the Air Activation) is enabled. Make sure that the sensor credentials (DevEUI, AppKey, JoinEUI) match the keys added in the server for activation of the device. The join procedure starts at spreading factor 7 with a join request every ~15 seconds. The sensor will gradually increase the time as well as the Spreading Factor between the following join requests until the join is successful. Every join request is indicated by a yellow LED blink. 3. After successful connection to a network, the sensor sends an uplink containing the sensor settings and enters sampling mode.
6.2 Sampling mode / Periodic measurement
The sensor makes periodic measurements according to the user configuration.
6.3 Scheduled transmission
The sensor transmits data according to the user configuration. However, the configured sending interval can be overridden by network limitations. Due to this, the spreading factor and sending interval settings might result in longer intervals than intended.
9 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa

6.4 LED indication
The LED, located in the bottom right corner, indicates different actions when the sensor is active.

LED indication Long red blink, long green blink Short yellow blink Short green blink Short red blink
Long blue blink

Action Sensor is starting up LoRa join request transmission LoRa uplink transmission Sensor failed to send an uplink Common cause is duty cycle limits Sensor has loaded new configuration from NFC

10 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa

7. Internal sensors
The populated internal sensors in the ERS series LoRa differ between models according to the list below.

ERS LoRa
Temperature Humidity Light Motion PIR CO2 Room occupancy Sound level VOC NFC

ERS Lite LoRa

ERS CO2 LoRa

ERS CO2 Lite
LoRa

ERS Eye LoRa

ERS Sound LoRa

ERS VOC LoRa

11 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
7.1 Temperature
Resolution: 0.1 °C Accuracy: 0.2 °C typical, see figure
7.2 Humidity
Resolution: 1 % RH Accuracy at 25 °C: ±2 % RH, see figure
Accuracy of RH over temp.: See figure
12 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
7.3 Light
The light sensor sits behind the PIR lens. For correct reading, make sure it isn’t obstructed. Accuracy can depend on angle of light source. Range: 0-65535 lux Accuracy: ± 10 % or ± 10 lux, whichever is greater.
7.4 CO2
The CO2 sensor normally runs an automatic baseline correction algorithm (ABC), with a period of 8 days. For a fully corrected measurement, the ABC needs 3 consecutive 8-day periods where the sensor sees fresh air (400 ppm) sometime during each ABC period. It can also be calibrated manually, and the ABC can be turned off. In this case it is recommended to do a manual calibration in fresh air once/year. Range: 400-10000 ppm Accuracy: 400-5000 ppm: ±30 ppm, ±3 % of reading (15-35 °C, 0-80 % RH) 5001-10000 ppm: ±10 % of reading (15-35 °C, 0-80 % RH)
13 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
7.5 Motion PIR
The PIR is able to detect human motion when the temperature difference increases or decreases between the fields created by the PIR lens. There are four options for motion detection, Count, Trigger, Trigger Once and Occupancy. In count mode, the sensor will report the number of times the PIR has been triggered from the last report. In trigger mode, the sensor will send a triggered uplink each time motion is detected as well as the total number of triggers for the elapsed period. In trigger once mode, the sensor will send one triggered uplink each report period, as well as the total number of triggers for the elapsed period. In occupancy mode, the sensor reports occupancy data. Occupancy has three levels, 0, 1 and 2. Occupancy is incremented when motion is detected and decreased when no motion is detected after a (selectable) period of time.
Note: The PIR has a blanking time of 8 seconds right after motion event and transmission. Any movements during this time will be ignored.
14 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa 7.5.1 PIR Lens detection pattern

Lens for ERS LoRa, ERS CO2 LoRa, ERS Sound LoRa and ERS VOC LoRa (wall mount)

From side

From top

Lens for ERS Eye LoRa (ceiling mount)

From side

From top

15 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
7.6 Room occupancy (ERS Eye LoRa)
The room occupancy algorithm uses both the PIR sensor and an 8×8 pixel heat map sensor. If the PIR triggers, occupancy is detected. If the PIR doesn’t trigger, the heat map is enabled, and its pattern is compared to a filtered mean value of the room. If there is a big enough difference between the two, occupancy is detected. Please allow for up to 24 hours for the algorithm to stabilize after installation.
7.6.1 Detailed description When the PIR is triggered, room occupancy is set to 1. If no other motion is detected within 5 minutes, the sensor captures a heat map image. Room occupancy is set to 2 if heat signatures are detected, otherwise, room occupancy is set to 0 and a new background image is calibrated.
Whenever the occupancy value is changed, the ERS Eye LoRa will trigger a transmission. No triggered transmission will be done as long as the occupancy value remains unchanged. Periodic transmissions will send all values, including occupancy.
Examples of occupancy values:
· Occupancy 0: Unoccupied. · Occupancy 1: Occupied. Occupancy detected by motion. · Occupancy 2: Occupied. Occupancy detected by heat signatures.
Heat map viewing angle: 60°x60°
Heat map accuracy (typical): ± 2.5°C
7.6.2 Special functions for ERS Eye LoRa Hot spot: Reports highest temperature pixel.
Raw data: Reports all 8×8 pixel temperature data.
Note: The heat map will also detect other warm objects (e.g., laptops). Warm objects that stay in the same place will eventually be calculated into the background image.
16 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
7.7 Sound level
The sound level sensor continuously measures the average and peak sound pressure level with no missing events. The analog part is always on, with a peakhold circuit for peak level, and a mean-value filtering for average value. The digital part wakes and samples both signals every 10 s and does the final calculation before sending the data at the desired send interval.
Average value range: 31 75 dB SPL
Peak value range: 59 100 dB SPL
Filtering: dBA
Sound resolution: 1 dB
Sound accuracy: ±5 dB

10s sample and peak reset. For every send interval, the ERS Sound LoRa calculates total peak and average for all samples. Red = peak, yellow = average.

7.8 VOC
Resolution: 0 ppb 2008 ppb: 2008 ppb 11110 ppb: 11110 ppb 60000 ppb:

1 ppb 6 ppb 32 ppb

Accuracy: 15 % of measured value (typical), 40% (max)

Measurement range: 0 60000 ppb TVOC
17 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
8. Device specifications

Mechanical specifications
Dimensions Weight
Enclosure IP rating Mounting Recommended installation height
Operating conditions
Usage environment Temperature Humidity
Power supply
Operating voltage Battery type Battery life
Radio / wireless
Wireless technology
Wireless security
LoRaWAN® Device Type Supported LoRaWAN® features Supported LoRaWAN® regions
Link budget RF Transmit Power EU directives compliance

76,4 x 76,4 x 22.5 mm 53 60 g excluding batteries / 70 95 g including batteries (depending on model) Plastic, PC / ABS IP20 Screws / Adhesive tape 1.6 m Wall 2.2m Ceiling, only ERS Eye LoRa
Indoor 0 to 50 °C 0 to 85 % RH (non-condensing)
3.6V DC AA 14505 (Li-SOCI2) Up to 10 years (Depending on settings and environmental factors).
LoRaWAN® 1.0.4, Regional Parameters RP2 – 1.0.3 LoRaWAN® End-to-End encryption (AESCTR), Data Integrity Protection (AESCMAC) Class A End-device OTAA, ABP, ADR, Adaptive Channel Setup EU868, IN865, US915, AU915, AS923, KR923, HK923 137dB (SF7) to 151 dB (SF12) Max 14 dBm EIRP RED 2014/53/EU, RoHS 2011/65/EU WEEE 2012/19/EU

18 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
9. Sensor payload format
The device uses the standard ELSYS payload format. Please see the specified document on our webpage.
10. Regulations
10.1 Legal Notices
All information, including, but not limited to, information regarding the features, functionality, and/or other product specification, are subject to change without notice. ELSYS reserves all rights to revise or update its products, software, or documentation without any obligation to notify any individual or entity. ELSYS and ELSYS logo are trademarks of ElektronikSystem i Umeå AB. All other brands and product names referred to herein are trademarks of their respective holders.
10.2 Declaration of conformity Hereby, ElektronikSystem i Umeå AB declares that the radio equipment type
Radio communication devices for low-speed data R&TTE Class 1 is in compliance with Directive 2014/53/EU, Directive 2011/65/EU and Directive 2012/19/EU.
The full text of the EU declaration of conformity is available at: https://www.elsys.se/link/eu-doc
10.3 Federal Communication Commission Interference Statement
Notice:
This device complies with Part 15 of the FCC Rules and with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
19 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: (1) l’appareil ne doit pas produire de brouillage, et (2) l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.

Radiofrequency radiation exposure Information: This equipment complies with FCC and Innovation, Science and Economic Development radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Informations sur l’exposition aux rayonnements radiofréquences:
Cet équipement est conforme à la réglementation de la FCC et aux limites d’exposition aux rayonnements définies par Innovation, Sciences et Développement économique pour un environnement non contrôlé. Cet équipement doit être installé et utilisé à une distance minimale de 20 cm entre le radiateur et votre corps. Cet émetteur ne doit pas être co-localisé ou fonctionner en conjonction avec une autre antenne ou un autre émetteur.

FCC ID: 2ANX3-ERS02

IC ID: 26904-ERS02

NOTICE: Changes or modifications made to this equipment not expressly approved by Elektroniksystem i Umeå AB may void the FCC authorization to operate this equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
20 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Operating manual ERS series LoRa
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Reorient or relocate the receiving antenna. · Increase the separation between the equipment and receiver. · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help.

11. Revision History

Revision 1.0
1.1 1.3

Description ERS2 series manual created Update for FCC/ISED Name Update

Date 2023-01-26
2023-09-25 2025-04-29

21 ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se Web: www.elsys.se

Documents / Resources

ELSYS ERS Series LoRa Wireless Sensor [pdf] Instruction Manual
ERS Series LoRa Wireless Sensor, ERS Series, LoRa Wireless Sensor, Wireless Sensor, Sensor

References

User Manual

ELSYS ERS Series LoRa Wireless Sensor Instruction Manual

ERS Series LoRa Wireless Sensor

Product Information

Specifications

Product Usage Instructions

Mounting Guidelines

Installation

Service and Maintenance

Sensor Configuration

FAQ

Q: How do I dispose of the device?

Q: What type of battery does the sensor contain?

Documents / Resources

References

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