ELSYS se ELT Series LoRaWan Wireless Sensor Instruction Manual
ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se ǀ Web: www.elsys.se
Specifications in this document are subject to change without notice.
©ElektronikSystem i Umeå AB 2022
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 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.
Product information
Description
The ELT series of sensors are universal LoRaWAN® industrial sensors for both in- and outdoor use. The internal sensors measure, depending on model, temperature, humidity, atmospheric pressure, distance, and acceleration. The ELT series are also equipped with multi-purpose I/O for connection to external sensors and equipment.
The sensors are equipped with NFC (Near Field Communication) for easy configuration with an NFC-enabled smartphone.
ELT Series attributes
Label
At the back of your device there is a label with an Aztec barcode containing DevEUI and sensor type.
Dimensions (mm)
Main features of the ELT series
- Compatible with LoRaWAN® specification 1.0.3
- IP67-rated
- Measures ambient temperature*
- Measures ambient humidity*
- Measures atmospheric pressure*
- Measures acceleration*
- Measures distance*
- Multi-purpose I/O**
- Modular build with expandable functionality
- Can be connected to external sensors and meters
- Easy installation
- Easy configuration
- 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
** Number of multi-purpose I/O ports differ depending on model
*** Depending on settings and environmental factors
Mounting guidelines
Common mounting guidelines for ELT line of sensors:
- For best RF and measurement performance, make sure you mount the sensor with the antenna vertically.
- If external wiring is to be connected to the sensor and the sensor is to be placed in environments where it may get wet, consider water runoff, and place the sensor with the cable gland placed vertically.
- Make sure that the sensor is not placed in direct sunlight, as the temperature reading from within the sensor case may be affected.
Ultrasonic and Snow
Place the sensor with the sonar nozzle pointed towards the surface that’s to be measured. Make sure that there’s a minimum of 30 cm clearance from the line to where the sonar module is pointed and the nearest object.
Consider §7.5, §7.6 and §7.7 for more information.
Installation
- Remove the front lid.
- Install the battery. The ELT requires one AA battery. The battery type is 3.6V Lithium Battery (ER14505).
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.
- Screw the lid in place with the four provided screws.
Service and maintenance
No serviceable parts inside. If service is needed other than battery replacement, please contact your distributor. - 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.
Sensor configuration
- Download ELSYS “Sensor Settings” application from Google Play or App store and install it on a smartphone or tablet. The device must support NFC.
- Enable NFC on the device and start the application.
- 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.
- Remove the device. Current settings will be displayed in the application.
- Use the application to change any settings if needed.
- 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.
- 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.
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.
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.
Sensor behavior
Sensor startup
- 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.
- 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.
- After successful connection to a network, the sensor sends an uplink containing the sensor settings and enters sampling mode.
Sampling mode / Periodic measurement
The sensor makes periodic measurements according to the user configuration.
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.
LED indication
The LED, located in the bottom right corner on the PCB, indicates different actions when the sensor is active.
Internal sensors
The populated internal sensors in the ERS2 series differ between models according to the list below.
Temperature
Resolution: 0.1 °C
Accuracy: 0.2 °C typical, see figure
Humidity
Note that the internal sensor will react very slowly to external changes in humidity.
The humidity sensor can be somewhat helped by equipping the ELT with a membrane if cable gland is not needed, but the response time will not be comparable to a sensor exposed to open air.
Resolution: 1 % RH
Accuracy at 25 °C: ±2 % RH, see figure
Accuracy of RH over temp.: See figure
Atmospheric Pressure
Note that the ELT2 is equipped with a cable gland with a pressure membrane, which allows for atmospheric pressure reading while keeping its IP 67 rating.
Atmospheric pressure
Range: 260 – 1260 hPa
Accuracy: ± 1 hPa.
Accelerometer
The accelerometer sensor reports values of X, Y and Z direction, depending on the sensor orientation. In the picture the Z reference value is around 64 and the value for X, Y is 0.
The accelerometer can be configured to send triggered messages when the measured acceleration exceededs a threshold in any axis for a selected amount of samples.
Range: ± 2.0 g
Sensitivity: 16 mg/digit
Data rate: 10 Hz
External Sensors
The ELT series of sensors can be connected to a wide array of external sensors, equipment, and modules. All connections to external gear are made available through the terminal block located on the top left of the circuit board inside the ELT. Available connections on the terminal block are power, ground and either one or two multi-purpose I/O-ports depending on the ELT variant.
Device specifications
Sensor payload format
The device uses the standard ELSYS payload format. Please see the specified document on our webpage.
Regulations
a. 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.
b. 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
c. 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.
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.
FCC ID: 2ANX3-ELT01 IC ID: 26904-ELT01
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 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.
Revision History
ElektronikSystem i Umeå AB Tvistevägen 48C, 90736 Umeå, Sweden
E-mail: support@elsys.se ǀ Web: www.elsys.se
Documents / Resources
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