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EGK-LW20L00 Operating Manual

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 will not be held responsible for any loss or damage resulting from not following the instructions of this operating manual.

  • Do not dismantle or modify in any way.
  • The device is not intended to be used as a reference sensor, and enginko Srl will not be held liable for any damage which may result from inaccurate readings.
  • Avoid mechanical stress
  • Do not use any detergent or alcohol to clean the device.
  • Risk of explosion if the battery is replaced with an incorrect type.
  • Risk of explosion if the battery pack is subjected to a short circuit.
  • Risk of explosion if the battery is burned or placed near high heat sources.
  • Risk of explosion if batteries are crushed, punctured or cut.
  • Do not expose batteries to contact with liquid substances.

Disposal information for users

Pursuant to and in accordance with Article 14 of the Directive 2012/19/EU of the European Parliament on waste electrical and electronic equipment (WEEE), and pursuant to and in accordance with Article 20 of the Directive 2013/56/EU of the European Parliament on batteries and accumulators and waste batteries.

The barred symbol of the rubbish bin shown on the equipment indicates that, at the end of its useful life, the product must be collected separately from other waste.

Please note that the lithium batteries must be removed from the equipment before it is given as waste and disposed separately. To remove the batteries refer to the specifications in the user manual. For additional information and how to carry out disposal, please contact the certified disposal service providers.

1. Description

The EGK-LW20L00 is a battery powered sensor intended for level measurement up to 7 meters. The device sends collected data over the LoRaWAN® network.

egk-lw20l00.jpg

2. Overview

2.1 Technical data

  • CPU ARM Cortex M4
  • Class A LoRaWAN® 1.0.2 , EU868
  • OTAA/ABP activation
  • Level range 350 ÷ 7000mm, resolution 1mm, accuracy TBD
  • Field of View: ±15°
  • Non contact level detection up to 7mt
  • Embedded antenna
  • Magnetic start-up
  • Time interval based or thresholds based uplink
  • Embedded accelerometer for tilt status
  • Primary battery with no harmful substances, replacement possible
  • Pole or surface mount
  • 5 years life time with SF12 and max Tx power, 48 Uplinks messages per day
  • Transmission @ 868 MHZ, 14dBm max.
  • BLE 5.0 interface for configuration, data reading and FW upgrade
  • Remote configuration
  • Storage temperature -30°C ÷ +80°C
  • Working temperature -30°C ÷ +65°C
  • Dimensions: 64.5×58.5×44.7mm
  • Protection grade: IP67
  • Weight: 95g

2.2 Installation

To ensure correct operation and reliable and consistent level measurements, install the EGK-LW20L00 sensor in front of the target whose distance need to be measured. Screws are provided. Mounting could be vertical or horizontal, depending on the application.

The device must be placed where the LoRaWAN® signal coverage is good (SF = 7 optimal, SF = 12 weak).

The device measures the distance to the closest target on its field of view. It works with different materials, for example water level in rivers or flooded streets, snow height, waste or grains level in bins or silos.

The measure is performed periodically according to parameter Period [min].

Custom brackets available on request.

2.2.1 Wall mount

For mounting onto wall, use the provided plate:

wall_mount.jpg

egk-rawall.jpg

2.2.2 Pole mount

For installation on poles, pillars or posts use the included bracket and fasteners:

pole_mount_1.jpg

\\  ===     2.2.3    LoRa Tool ===

To deploy the sensor, download the latest LoRa Tool Android App to setup LoRaWAN® credentials and other preferences :

lora_tool.jpg

2.2.4 Connection

Enable the Bluetooth on the smartphobne and open the App:

bt_scan.jpeg

once the sensors list appears (as BLE MAC address), select the sensor you need to configure:

bt_mac.jpg

and read it:

bt_read.jpg

2.3 Power ON/OFF

The sensor is shipped completely off to prevent battery consumption during storage. It is therefore necessary to carry out a first power-on prior to commissioning.

To power on the sensor: lay the magnet at the bottom of the provided tool into the area shown in the figure:

on_mag.jpg

Successful power on is signaled by the flashing of the 2 LEDs.

In case of long period of inactivity, if necessary, is possible to shut-off again the sensor to prevent battery consumption, via downlink or with LoRa Tool App:

bt_off.jpg

2.4 System leds

egk-lw20l00_led.jpg

LoRaWAN® not configured gfrf_rev0.jpg Slow flashing
Joining gf_ev0.jpg Quick flashing
Sending gf_ev0.jpg Quick flashing

2.5 Battery

This sensor contains lithium battery, which must be disposed of separately.

EGK-LW20L00 is provided with a battery pack:

Code Description
EGK-1S2PCR 4800mAh battery pack

Replacement battery only available from enginko.

This is the estimated battery life (in years) in the worst conditions:

10min reading 15min reading 30min reading
SF12 2 3 5
SF7 4 5 8

2.5.1 Battery replacement

  • remove the front panel of the sensor with a small screwdriver:

batt0.jpg

  • remve the PCB batteries pack from the main board (PCB board is secured with two small screws):

batt2.jpg

batt3.jpg

  • Place the new PCB batteries pack and put them in place with the screws:

batt1.jpg

\\    * Place the front panel and fix it with the 4 screws.

After the batteries replacement, internal counters need to be resetted.

batt_res.jpg

To perform the operation, you need a unique reset code that must be requested to enginko (please provide the DevEUI of the sensor when you ask for that code):

battery_res_0.jpg

At the end of the procedure the battery level displays 100%.

2.6 Firmware update

Download the latest firmwares available on the smartphone:

update_firmwares.jpg

Upload it with LoraTool App:

bt_fw.jpg

3. Measures

On each reading of the sensor by LoraTool, the measured distance is shown on the main page:

sc2_dist.jpg

Once provisioned on a LoRaWAN® network, the device sends the distance & timestamp to the server via uplink.

3.1 Level settings

Level measurements are carried out according to few parameter settings. A target over the defined range cannot be detected. Read and write of parameters can be done using LoRaTool App. They have a default value and can be modified to be tailored on the specific use case.

Meaning of parameters is related to following diagram. The “REFERENCE” (distance=0mm) is the top surface of the sensor:

distances.jpg

3.1.1 Start [mm]

Starting point of the measurement (in mm from “REFERENCE” point).

Values can be set from 140 to 1360:

start_1.jpg

Default: 400

A target within the “Start [mm]” distance will result at a “Start” distance.

The “Start [mm]” value is also related to other level parameters. Contact enginko in case of assistance.

3.1.2 End [mm]

Range of measure (in mm, from “Reference” point).

Values can be set from 0 to 7000:

end_1.jpg

Default: 7000

The END value can be inferred from a physical measurement of obtained from the sensor itself using the function “Calculate Floor”

Floor_1.jpg

After executing this function, perform a new reading and validate the value obtained.

3.1.3 Power

Power setting for target detection.

Values can be set from 1 to 5:

power_1.jpg

Default: 3

3.1.4 Sort

Sorting type.

Values can be set from 0 to 3:

sort_1.jpg

Default: 1

3.1.5 Avg

Number of samples for each measure

Values can be set from 1 to 100:

avg_1.jpg

Default: 5

3.1.6 Algorithm

alg_1.jpg

Default: Standard

3.1.7 Threshold type

Values can be set from 0 to 2:

thr_1.jpg

Default: 2

4 LoRaWAN network

The sensor is compliant with LoRaWAN® specification 1.0.2.

activation2_0.jpg

4.1 Activation

The device supports the following activations on a LoRaWAN® network:

  1. NONE: sensor not activated
  2. OTAA: the JoinEUI and the AppKey not setted, must be written to the device;
  3. OTAA MCF88: Over the air activation, fixed keys: JoinEUI = 904e915000000001, AppKey on request;
  4. OTAA ENGINKO: Over the air activation, fixed keys: JoinEUI = 904e915000000001, AppKey on request;
  5. ABP: requires writing to the device of NwkSkey, AppSkey, DevAddr.

activation1_0.jpg

The device exits factory activated with NONE mode. On request devices can be shipped already activated.

Note: in OTAA AppKey is write only, in reading the field will always be empty, even if set.


Time sync

Normally sensor asks for a time sync at every power on (uplink starting with 01) or once a week. If no or wrong reply received it will retry after 1 week.

If not handled in the right way can cause a unnecessary battery consumption (battery life < 2 years).

Please check chapter 2.1 DATA FRAME FORMAT.

4.2 Other settings

Network settings: please keep “Any” settings. Change it only if Objenious network is used (default_ any).

Network type: LoRa syncword can be setted as “private”(0x12) instead “public” (0x34), but the NS must be setted accordingly (default: public).

Band: select the right LoRaWAN ® band settings accodingly to country requirements.

activation3_0.jpg

DST: set to change DST (default: none).

No time sync: set to disable time synchronization request (default: enabled).

UnConfirmed: set for unconfirmed uplinks (default: confirmed uplink).

Led OFF: set to disable the led.

Single join/day: set for to allow only one join per day (default: multiple join allowed).

Period: time interval between two measures (in minutes).

Clock timed: set to sincronize the reading with the internal clock.

Accelerometer: set to enable asynchronous measure in case of shaking (useful for debug).

bt_set1.jpg

5 Passwords

The device can be protected by passwords, to avoid unauthorized persons to read data or modify parameters.

As default passwords are equal to 0.

Allowed values range from 0 to 999999999 (only numbers).

To change the passwords, set the new values with the LoRa Tool App:

password1_0.jpg

Once the passwords are setted, to gain access from LoRa Tool to the sensor, open the App:

bt_scan.jpeg

and set the right values before reading from the device:

password2_0.jpg

To bring back the sensor to factory default and reset the passwords, a reset code must be requested to enginko (please provide the DevEUI of the sensor when you ask for that code).

6 Configuration file

WIth LoRa Tool App is possible to configure the device using an XML file, instead to manually adjust the parameters (for details about the file format please ask to enginko). This is very useful especially in case of multiple devices configuration.

With “Save” button an XML file with the actual configuration of the sensor will be generated. This is useful to store or clone the configuration, or to send it to enginko's support if needed.

files_rev0.jpg

6.1 Multi devices configuration

WIth LoRa Tool App is possible to configure many devices in an easy way.

For multi-configuration is needed at least one XML file with the parameters to set.

Settings on this file will be applied to all the sensors.

With an additional XLS file is possible to load different LoRa configuration parameters (Activation Type, AppKey, AppEUI, NetKey, DevAddress, Band, Private option) for each sensor, based on DevEUI.

When the sensor is approached, if one parameter is different from files, the APP will ask you if you want to overwrite.

XLS is prevailing on the XML, so if both files are enabled, if the DevEUI of the device matches one of the DevEUIs in the XLS file, LoRa parameters will be setted from this one.

These configuration can be done in the in the Settings:

  • Enable or disable the use of the general configuration by file;
  • Enable or disable the use of the specific configuration by file;
  • Verify the passwords;
  • Writing the passwords.

multiple_rev0.jpg

For details on files format please ask to enginko.

7 LoRaWEB Tool

enginko provides, upon free registration, LoRaWEB online tool, where for each sensor it is possible to find documentation, javascript examples for parsing, downlink generator and uplink decoder:

LoRaWEB Tool (iot.mcf88.cloud/LoRaWeb)

lt1_0.jpg

lt2_0.jpg

8 Payload

For payload descriptions, uplinks and downlinks format and available commands please refer to this document:

DATA FRAME FORMAT

9 Ordering code

Ordering Code Description
EGK-LW20L00 LoRaWAN® level sensor

10 Declaration of conformity

Hereby, enginko Srl declares that EGK-LW20L00 complies with the essential requirements and other relevant provisions of Directive 2014/53/EU.

11 Contacts

enginko Srl
Via Roma 3 I-28060 Sozzago (NO)
T : +39 0321 15 93 088

E : info@enginko.com
PEC: enginkosrl@legalmail.it
W: enginko.com


Document rev. 7