Dragino LTC2 Manuel utilisateur
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LTC2 LoRaWAN Temperature Transmitter User Manual
Document Version: 1.1
Image Version: v1.0
Version
Description
Date
1.0
Release
2021-May-17
1.1
Correct Index
2021-Jul-5
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1. Introduction..............................................................................................................................4
1.1 What is LTC2 LoRaWAN Temperature Transmitter .....................................................................4
1.2 Features......................................................................................................................................4
1.3 Applications................................................................................................................................5
1.4 Hardware Change log.................................................................................................................5
1.5 Pin Definitions and Switch ..........................................................................................................5
1.5.1 Jumper JP2 ( Power ON) ...................................................................................................5
1.5.2 LED....................................................................................................................................5
1.5.3 PT100 Interfaces ...............................................................................................................6
1.5.4 Reset Button .....................................................................................................................6
1.6 Probe Variant..............................................................................................................................6
2. How to use LTC2?......................................................................................................................8
2.1 Connect to PT100 sensors ..........................................................................................................8
2.2 How it works?.............................................................................................................................8
2.3 Quick guide to connect to LoRaWAN server (OTAA) ...................................................................8
2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2. ........................................8
2.3.2 Step 2: Power on LTC2 ....................................................................................................12
2.4 Uplink Payload..........................................................................................................................13
2.4.1 Payload Analyze..............................................................................................................13
2.5 Datalog Feature........................................................................................................................14
2.5.1 Unix TimeStamp..............................................................................................................14
2.5.2 Set Device Time ..............................................................................................................15
2.5.3 Poll sensor value .............................................................................................................16
2.5.4 Datalog Uplink payload...................................................................................................17
2.6 Alarm Mode..............................................................................................................................18
3. Configure LTC2 via AT Command or LoRaWAN Downlink ........................................................19
3.1 Set Transmit Interval Time........................................................................................................19
3.2 Enable PT100 channels.............................................................................................................19
3.3 Set External Sensor Mode.........................................................................................................20
3.4 Quit AT Command ....................................................................................................................21
3.5 Set system time ........................................................................................................................21
3.6 Set Time Sync Mode .................................................................................................................21
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3.7 Set Time Sync Interval ..............................................................................................................22
3.8 Retrieve data ............................................................................................................................22
3.9 Enable Alarm mode ..................................................................................................................22
3.10 Alarm check time.................................................................................................................22
3.11 Set Alarm Threshold ............................................................................................................23
3.12 Set Calibrate Value ..............................................................................................................23
3.13 Poll Calibrate Value..............................................................................................................24
3.14 Print data entries base on page...........................................................................................24
3.15 Print last few data entries....................................................................................................25
3.16 Clear Flash Record ...............................................................................................................25
4. Battery & How to replace........................................................................................................26
4.1 Battery Type .............................................................................................................................26
4.2 Replace Battery ........................................................................................................................26
4.3 Power Consumption Analyze ....................................................................................................26
5. Firmware Change Log and Upload Firmware...........................................................................27
6. FAQ.........................................................................................................................................28
6.1 How to use AT Command to configure LTC2 .............................................................................28
6.2 How to connect a customized PT100 cable? ............................................................................29
6.3 What is the frequency range of LTC2 LoRa part? .....................................................................31
6.4 How to change the LoRa Frequency Bands/Region? ................................................................31
7. Trouble Shooting.....................................................................................................................31
8. Order Info ...............................................................................................................................31
9. Packing Info ............................................................................................................................32
10. Support ..............................................................................................................................32
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1. Introduction
1.1 What is LTC2 LoRaWAN Temperature Transmitter
The Dragino LTC2 Industrial LoRaWAN Temperature Transmitter is designed to monitor
temperature for different environment. It supports to read PT100 probe and convert the value to
temperature and uplink to IoT server via LoRaWAN protocol.
LTC2 supports Datalog feature. User can retrieve the sensor value via LoRaWAN downlink
command.
LTC2 is powered by 8500mA Li-SOCI2 battery for long time measurement. The battery can run
2~10 years depends on the network environment and working mode.
Each LTC2 has two internal 24-bit ADC interfaces and are calibrated on 12 set resistors to make
sure the accuracy measurement on wide range.
LTC2 is LoRaWAN v1.0.3 compatible. Each LTC2 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 Features
✓LoRaWAN v1.0.3 Class A
✓max: 2 x monitor temperature channels
✓Support 3 -wire PT-100
✓8500mAh Li-SOCI2 Battery
✓Firmware upgrade via console
✓Wall Mountable
✓Configurable via LoRa or UART
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✓Datalog and retrieve via LoRaWAN
✓Use pre-load PT100 probe or 3rd PT100 probe
✓Factory calibration for different resistance range
✓Support accuracy measure of resistance and upload
✓Battery Monitoring and upload
1.3 Applications
✓Logistics and Supply Chain Management
✓Food management
✓Cold chains solution
✓Industrial Monitoring and Control
1.4 Hardware Change log
LTC2 v1.0: Release.
1.5 Pin Definitions and Switch
1.5.1 Jumper JP2 ( Power ON)
Put a jumper on JP2 will power on the LTC2.
1.5.2 LED
The LED will flash in below case.
1) Send an uplink packet
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1.5.3 PT100 Interfaces
There are two independent channels to connect 2 x PT100 probes.
Each channel has 3-wire connection for 3-wire PT100 probes.
1.5.4 Reset Button
Press this button will reboot the LTC2
1.6 Probe Variant
LTC2 provide default probe version. See below for the variant:
Model
Photo
Description
LTC2-SI
Standard IP68 Probe Version
➢LTC2 with 1 x Standard IP68 PT100 probe.
➢Installation: Insert
➢Cable Length : 2m
➢PT100 Class : Class A
➢Probe Dimension: 4*30mm
➢Measure Range: -50 ~ 200 °C
➢Suitable Environment: General environment
LTC2-LT
Low Temperature Version
➢LTC2 with 1 x Low Temperature PT100 probe.
➢Installation: Insert
➢Cable Length : 2m
➢PT100 Class : Class A
➢Probe Dimension: 4*30mm
➢Measure Range: -196 ~ 150 °C
➢Suitable Environment: Low temperature
measurement, such as COVID vaccine transport
LTC2-FS
Food Safety Version
➢LTC2 with 1 x Food Safety PT100 probe.
➢Installation: Insert
➢Cable Length : 2m
➢PT100 Class : Class A
➢Probe Dimension: 4*150mm
➢Measure Range: -50 ~ 200 °C
➢Suitable Environment: Food temperature
measurement
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LTC2-FT
Flat Type Version
➢LTC2 with 1 x Flat Type PT100 probe.
➢Installation: Attached
➢Cable Length : 2m
➢PT100 Class : Class A
➢Probe Dimension: 8*25mm
➢Measure Range: -50 ~ 200 °C
➢Suitable Environment: Attached to the measure
point.
LTC2-HT
High Temperature Version
➢LTC2 with 1 x high temperature PT100 probe.
➢Installation: Insert
➢Cable Length : 3m
➢PT100 Class : Class A
➢Probe Dimension: 4*30mm
➢Measure Range: -70 ~ 550 °C
Suitable Environment: High Temperature
LTC2-NA
No Probe version:
➢User can connect to their own PT100 Probe
➢Grand Hole: M12
➢Suitable Environment:
Connect to customized probe
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2. How to use LTC2?
2.1 Connect to PT100 sensors
LTC2 has different probe option provided for ordering, if user has LTC2 with probe, just skip this
step. If user want to connect to a 3rd party PT100 probe, please see CONNECT A 3rd PARTY PT100
probe.
2.2 How it works?
The LTC2 is working in LoRaWAN OTAA Class A mode. Each LTC2 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 so to register. LTC2 will join the LoRaWAN network and start to transmit data. The
default period for each uplink is 20 minutes.
On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor
and send out to server.
2.3 Quick guide to connect to LoRaWAN server (OTAA)
Here is an example for how to join the TTN v3 LoRaWAN Server. Below is the network structure,
in this demo we use DLOS8 as LoRaWAN gateway.
The DLOS8 is already set to connect to TTN . Rest we need to is register the LTC2 to TTN v3:
2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2.
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Below is TTN screen shot:
➢Create Application first.
➢Manually Add a LoRaWAN End Device device. Choose OTAA and MAC v1.0.3
Input the OTAA keys for LTC2.
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Each LTC2 is shipped with a sticker with the default device EUI as below:
➢Input these keys to device portal.
➢Choose the Frequency band for this end node.
Ce manuel convient aux modèles suivants
6
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