DirekTronik LSN50v2-D20 Manuale utente

LSN50v2-D20-D22-D23 LoRaWAN Temperature

Sensor User Manual

last modiﬁed by Xiaoling

on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

Table of Contents

1. Introduction ........................................................................................................................................................................ 4

1.1 What is LSN50V2-D2x LoRaWAN Temperature Sensor ........................................................................................ 4

1.2 Speciﬁcations ................................................................................................................................................................ 4

1.3 Features ........................................................................................................................................................................ 5

1.4 Applications ................................................................................................................................................................... 5

1.5 Hardware Variant ......................................................................................................................................................... 5

1.6 Pin Deﬁnitions and Switch .......................................................................................................................................... 6

1.6.1 Pin Deﬁnition ........................................................................................................................................................... 6

1.6.2 Jumper JP2 ............................................................................................................................................................. 7

1.6.3 BOOT MODE / SW1 .............................................................................................................................................. 7

1.6.4 Reset Button ............................................................................................................................................................ 7

1.6.5 LED ........................................................................................................................................................................... 7

1.7 Hardware Change log ................................................................................................................................................. 7

2. How to use LSN50v2-D2x? ............................................................................................................................................. 7

2.1 How it works ................................................................................................................................................................. 7

2.2 Quick guide to connect to LoRaWAN server (OTAA) ............................................................................................. 7

2.3 Uplink Payload ............................................................................................................................................................ 13

2.3.1 Payload Analyze ................................................................................................................................................... 13

2.3.2 Payload Decoder ﬁle .............................................................................................................................................. 16

2.4 Temperature Alarm Feature ..................................................................................................................................... 16

2.5 Conﬁgure LSN50v2-D20 ........................................................................................................................................... 18

2.5.1 General Conﬁgure Commands ........................................................................................................................... 18

2.5.2 Sensor related commands .................................................................................................................................. 19

2.6 LED Status ................................................................................................................................................................. 20

2.7 Button Function .......................................................................................................................................................... 20

2.8 Firmware Change Log ............................................................................................................................................... 20

3. Battery & How to replace .............................................................................................................................................. 20

3.1 Battery Type ............................................................................................................................................................... 20

3.2 Replace Battery .......................................................................................................................................................... 21

3.3 Power Consumption Analyze ................................................................................................................................... 21

3.3.1 Battery Note .......................................................................................................................................................... 23

3.3.2 Replace the battery ............................................................................................................................................. 23

4. Use AT Command .......................................................................................................................................................... 23

4.1 Access AT Commands ............................................................................................................................................. 23

5. FAQ .................................................................................................................................................................................. 25

5.1 What is the frequency range of LSN50v2-D20? .................................................................................................... 25

5.2 What is the Frequency Plan? ................................................................................................................................... 25

5.3 How to update the ﬁrmware? ................................................................................................................................... 25

6. Trouble Shooting ............................................................................................................................................................ 26

6.1 AT Command input doesn't work ............................................................................................................................ 26

6.2Abnormal temperature ............................................................................................................................................... 26

7. Order Info ........................................................................................................................................................................ 26

8. Packing Info ..................................................................................................................................................................... 26

9. Support ............................................................................................................................................................................. 26

Page 2 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual



Table of Contents:

•1. Introduction

•1.1 What is LSN50V2-D2x LoRaWAN Temperature Sensor

•1.2 Speciﬁcations

•1.3 Features

•1.4 Applications

•1.5 Hardware Variant

•1.6 Pin Deﬁnitions and Switch

•1.6.1 Pin Deﬁnition

•1.6.2 Jumper JP2

•1.6.3 BOOT MODE / SW1

•1.6.4 Reset Button

•1.6.5 LED

•1.7 Hardware Change log

•2. How to use LSN50v2-D2x?

•2.1 How it works

•2.2 Quick guide to connect to LoRaWAN server (OTAA)

•2.3 Uplink Payload

•2.3.1 Payload Analyze

•Battery:

•Temperature RED or Temperature White :

•Temperature White:

•Temperature Black:

•Alarm Flag& MOD:

•Decode corresponding probe color：

•2.3.2 Payload Decoder ﬁle

•2.4 Temperature Alarm Feature

•2.5 Conﬁgure LSN50v2-D20

•2.5.1 General Conﬁgure Commands

•2.5.2 Sensor related commands

•Set Alarm Threshold:

•Set Alarm Interval:

•Poll the Alarm settings:

•2.6 LED Status

•2.7 Button Function

•2.8 Firmware Change Log

Page 3 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

•3. Battery & How to replace

•3.1 Battery Type

•3.2 Replace Battery

•3.3 Power Consumption Analyze

•3.3.1 Battery Note

•3.3.2 Replace the battery

•4. Use AT Command

•4.1 Access AT Commands

•5. FAQ

•5.1 What is the frequency range of LSN50v2-D20?

•5.2 What is the Frequency Plan?

•5.3 How to update the ﬁrmware?

•6. Trouble Shooting

•6.1 AT Command input doesn't work

•6.2Abnormal temperature

•7. Order Info

•8. Packing Info

•9. Support

1. Introduction

1.1 What is LSN50V2-D2x LoRaWAN Temperature Sensor

The Dragino LSN50v2-D2x is a LoRaWAN Temperature Sensor for Internet of Things solution. It can be used to

measure the temperature of air, liquid or object, and then upload to IoT server via LoRaWAN wireless protocol.

The temperature sensor used in LSN50v2-D2x can measure -55°C ~ 125°C with accuracy ±0.5°C (max ±2.0

°C).

LSN50v2-D2x supports temperature alarm feature, user can set temperature alarm for instant notice.

LSN50v2-D2x has max 3 probes which measure maximum 3 temperature points.

LSN50v2-D2x is powered by 8500mAh Li-SOCI2 battery, it is designed for long term use up to 10 years. (Actually

Battery life depends on the use environment, update period. Please check related Power Analyze report).

Each LSN50v2-D2x is pre-load with a set of unique keys for LoRaWAN registration, register these keys to local

LoRaWAN server and it will auto connect after power on.

1.2 Speciﬁcations

Common DC Characteristics:

Page 4 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

• Supply Voltage: built in 8500mAh Li-SOCI2 battery

• Operating Temperature: -40 ~ 85°C

Temperature Sensor:

• Range: -55 to + 125°C

• Accuracy ±0.5°C (max ±2.0 °C).

LoRa Spec:

• Frequency Range, 

• Band 1 (HF): 862 ~ 1020 Mhz

• 168 dB maximum link budget.

• High sensitivity: down to -148 dBm.

• Bullet-proof front end: IIP3 = -12.5 dBm.

• Excellent blocking immunity.

• Built-in bit synchronizer for clock recovery.

• Preamble detection.

• 127 dB Dynamic Range RSSI.

• Automatic RF Sense and CAD with ultra-fast AFC.

• LoRaWAN 1.0.3 Speciﬁcation

Power Consumption

• Sleeping Mode: 20uA

• LoRaWAN Transmit Mode: 125mA @ 20dBm 44mA @ 14dBm

1.3 Features

• LoRaWAN v1.0.3 Class A

• Ultra-low power consumption

• 1 ~ 3 External Temperature Probes

• Measure range -55°C ~ 125°C

• Temperature alarm

• Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865

• AT Commands to change parameters

• Uplink on periodically or Interrupt

• Downlink to change conﬁgure

• 8500mAh Battery for long term use

1.4 Applications

• Wireless Alarm and Security Systems

• Home and Building Automation

• Automated Meter Reading

• Industrial Monitoring and Control

• Long range Irrigation Systems,etc.

1.5 Hardware Variant

Model Photo Probe Info

Page 5 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

LSN50v2 D20 1 x DS28B20 Probe

Cable Length : 2 meters

sensor cable is made by Silica Gel for higher

temperature tolerance.

LSN50v2 D22 2 x DS28B20 Probes

Cable lengths total 1.5meters per probe

Cable Drawing: See This Link

LSN50v2 D23 3 x DS28B20 Probes

Cable lengths total 1.5meters per probe

Cable Drawing: See This Link

1.6 Pin Deﬁnitions and Switch

1.6.1 Pin Deﬁnition

Page 6 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

The device is pre-conﬁgured to connect to temperature sensor. The other pins are not used. If user want to know

more about other pins, please refer the user manual of LSn50v2 at: http://www.dragino.com/downloads/index.php?

dir=LSN50-LoRaST/

1.6.2 Jumper JP2

Power on Device when put this jumper.

1.6.3 BOOT MODE / SW1

1. ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade ﬁrmware. LED won't

work. Firmware won't run.

2. Flash: work mode, device starts to work and send out console output for further debug

1.6.4 Reset Button

Press to reboot the device.

1.6.5 LED

It will ﬂash:

1. When boot the device in ﬂash mode

2. Send an uplink packet

1.7 Hardware Change log

LSN50v2-D20 v1.0: Release.

2. How to use LSN50v2-D2x?

2.1 How it works

The LSN50v2-D2x is working as LoRaWAN OTAA Class A end node. Each LSN50v2-D2x is shipped with a

worldwide unique set of OTAA and ABP keys. User needs to input the OTAA or ABP keys in the LoRaWAN network

server to register. Open the enclosure and power on the LSN50v2-D2x, it will join the LoRaWAN network and start

to transmit data. The default period for each uplink is 20 minutes.

2.2 Quick guide to connect to LoRaWAN server (OTAA)

Here is an example for how to join the TTN LoRaWANServer. Below is the network structure, in this demo we use

DLOS8 as LoRaWAN gateway.

Page 7 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

The DLOS8 is already set to connect to TTN. What the rest we need to is register the LSN50V2-D20 to TTN:

Step 1: Create a device in TTN with the OTAA keys from LSN50V2-D20.

Each LSN50V2-D20 is shipped with a sticker with the default device EUI as below:



You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:

Page 8 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

Add APP EUI and DEV EUI：

Page 9 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

User Manual for LoRaWAN End Nodes - LSN50v2-D20-

D22-D23 LoRaWAN Temperature Sensor User Manual

Add APP EUI in the application：

Page 10 / 27 - last modiﬁed by Xiaoling on 2023/03/07 17:41

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