Dragino LHT65N-E5 User manual

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance
Sensor User Manual
Last modified by Xiaoling (/xwiki/bin/view/XWiki/Xiaoling) on 2023/04/27 10:59
Table of Contents：
1. Introduction
1.1 What is LHT65N-E5 Temperature,Humidity&Illuminance Sensor
1.2 Features
1.3 Specification
2. Connect LHT65N-E5 to IoT Server
2.1 How does LHT65N-E5 work?
2.2 How to Activate LHT65N-E5?
2.3 Example to join LoRaWAN network
2.3.1 Step 1: Create Device n TTN
2.3.2 Step 2: Activate LHT65N-E5 by pressing the ACT button for more than 5 seconds.
2.4 Uplink Payload ( Fport=2)
2.4.1 Decoder in TTN V3
2.4.2 BAT-Battery Info
2.4.3 Built-in Temperature
2.4.4 Built-in Humidity
2.4.5 Ext value
2.4.5.1 Ext=0x05, Illuminance Sensor
2.4.5.2 Ext=0x85, E5 sensor with Unix Timestamp
2.5 Show data on Datacake
2.6 Datalog Feature
2.6.1 Ways to get datalog via LoRaWAN
2.6.2 Unix TimeStamp
2.6.3 Set Device Time
2.6.4 Poll sensor value
2.6.5 Datalog Uplink payload
2.7 Alarm Mode

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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2.7.1 ALARM MODE
2.8 LED Indicator
2.9 installation
3. Sensors and Accessories
3.1 E2 Extension Cable
4. Configure LHT65N-E5 via AT command or LoRaWAN downlink
4.1 Set Transmit Interval Time
4.2 Currently only supports E5
4.3 Set to sleep mode
4.4 Set system time
4.5 Set Time Sync Mode
4.6 Set Time Sync Interval
4.7 Print data entries base on page.
4.8 Print last few data entries.
4.9 Clear Flash Record
4.10 Auto Send None-ACK messages
5. Battery & How to replace
5.1 Battery Type
5.2 Replace Battery
5.3 Battery Life Analyze
6. FAQ
6.1 How to use AT Command?
6.2 Where to use AT commands and Downlink commands
6.3 How to change the uplink interval？
6.4 How to use TTL-USB to connect PC to upgrade firmware?
7. Order Info
8. Packing Info
9. Reference material
10. FCC Warning
1. Introduction
1.1 What is LHT65N-E5 Temperature,Humidity&Illuminance Sensor
The Dragino LHT65N-E5 Temperature, Humidity & Illuminance sensor is a Long Range LoRaWAN Sensor.It includes a built-in Temperature & Humidity sensor and
has an external Illuminance sensor.
The LHT65N-E5 allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity
whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building
automation, and so on.
LHT65N-E5 has a built-in 2400mAh non-chargeable battery which can be used for more than 10 years*.
LHT65N-E5 is fully compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
* The actual battery life depends on how often to send data, please see battery analyzer chapter.
1.2 Features
LoRaWAN v1.0.3 Class A protocol
Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
AT Commands to change parameters
Remote configure parameters via LoRaWAN Downlink
Firmware upgradeable via program port
Built-in 2400mAh battery for up to 10 years of use.
Built-in Temperature & Humidity sensor
External Illuminance Sensor
Tri-color LED to indicate working status
Datalog feature to save sensor data when no LoRaWAN network
1.3 Specification
Built-in Temperature Sensor:
Resolution: 0.01 °C
Accuracy Tolerance : Typ ±0.3 °C
Long Term Drift: < 0.02 °C/yr
Operating Range: -40 ~ 85 °C

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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Built-in Humidity Sensor:
Resolution: 0.04 %RH
Accuracy Tolerance : Typ ±3 %RH
Long Term Drift: < 0.02 °C/yr
Operating Range: 0 ~ 96 %RH
External IIIuminace Sensor:
Base on BH1750 Illumination Sensor
Cable Length : 50cm
Resolution: 1 lx
Range: 0-65535 lx
Operating Range: -40 °C ~ 85 °C
2. Connect LHT65N-E5 to IoT Server
2.1 How does LHT65N-E5 work?
LHT65N-E5 is configured as LoRaWAN OTAA Class A sensor by default. Each LHT65N-E5 is shipped with a worldwide unique set of OTAA keys. To use LHT65N-E5 in a
LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N-E5.
If LHT65N-E5 is within the coverage of this LoRaWAN network. LHT65N-E5 can join the LoRaWAN network automatically. After successfully joining, LHT65N-E5 will start
to measure environment temperature, humidity & illumination, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
2.2 How to Activate LHT65N-E5?
The LHT65N-E5 has two working modes:
Deep Sleep Mode: LHT65N-E5 doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
Working Mode: In this mode, LHT65N-E5 works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between
each sampling/tx/rx periodically, LHT65N-E5 will be in STOP mode (IDLE mode), in STOP mode, LHT65N-E5 has the same power consumption as Deep Sleep
mode.
The LHT65N-E5 is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
Behavior on ACT Function Action
Pressing ACT between
1s < time < 3s
Test uplink
status
If LHT65N is already Joined to
rhe LoRaWAN network, LHT65N
will send an uplink packet, if
LHT65N has external sensor
connected,Blue led will blink
once. If LHT65N has not external
sensor, Red led will blink once.
Pressing ACT for more
than 3s
Active Device Green led will fast blink 5 times,
LHT65N will enter working mode
and start to JOIN LoRaWAN
network.
Green led will solidly turn on for
5 seconds after join in network.

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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Fast press ACT 5 times. Deactivate
Device
Red led will solid on for 5
seconds. Means LHT65N is in
Deep Sleep Mode.
2.3 Example to join LoRaWAN network
This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
Assume the LPS8v2 is already set to connect to TTN V3 network (https://eu1.cloud.thethings.network) , So it provides network coverage for LHT65N-E5. Next we need
add the LHT65N-E5 device in TTN V3:
2.3.1 Step 1: Create Device n TTN
Create a device in TTN V3 with the OTAA keys from LHT65N-E5.
Each LHT65N-E5 is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
Add APP EUI in the application.

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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Note: LHT65N-E5 use same payload decoder as LHT65.

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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Input APP EUI, APP KEY and DEV EUI:
2.3.2 Step 2: Activate LHT65N-E5 by pressing the ACT button for more than 5 seconds.
Use ACT button to activate LHT65N-E5 and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the
panel.
2.4 Uplink Payload ( Fport=2)
The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and every 20 minutes send one uplink by default.
After each uplink, the BLUE LED will blink once.
Size(bytes) 2 2 2 1 4
Value BAT Built-In
Temperature
Built-in
Humidity
Ext # Ext
value
The First 6 bytes: has fix meanings for every LHT65N-E5.
The 7th byte (EXT #): defines the external sensor model. It can be 0x05 or 0x09 for LHT65N-E5
The 8 ~ 9 byte: Illuminance. Range: 0-65535 lx.
The 10th ~ 11th byte: Reserve, always 0xFFFF
th th

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2.4.1 Decoder in TTN V3
When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N-E5 decoder in TTNv3 for friendly reading.
Below is the position to put the decoder and LHT65N-E5 decoder can be download from here: https://github.com/dragino/dragino-end-node-decoder
(https://github.com/dragino/dragino-end-node-decoder)
2.4.2 BAT-Battery Info
These two bytes of BAT include the battery state and the actually voltage
Bit(bit) [15:14] [13:0]
Value BAT Status
00(b): Ultra Low ( BAT <= 2.50v)
01(b): Low (2.50v <=BAT <= 2.55v)
10(b): OK (2.55v <= BAT <=2.65v)
11(b): Good (BAT >= 2.65v)
Actually BAT voltage
Check the battery voltage for LHT65N-E5.
BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
2.4.3 Built-in Temperature
Temperature: 0x0ABB/100=27.47℃
Temperature: (0xF5C6-65536)/100=-26.18℃
2.4.4 Built-in Humidity

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LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual - DRAGINO
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Humidity: 0x025C/10=60.4%
2.4.5 Ext value
2.4.5.1 Ext=0x05, Illuminance Sensor
Illumination=0x005E=94 lux
The last 2 bytes of data are meaningless
When the sensor is not connected or not connected properly, will show "NULL"
The last 2 bytes of data are meaningless
2.4.5.2 Ext=0x85, E5 sensor with Unix Timestamp
Timestamp mode is designed for LHT65N-E5 with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of
AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
Size(bytes) 2 2 2 1 4
Value External
temperature
Built-In
Temperature
BAT Status
&
Illumination
Status
& Ext
Unix
Time
Stamp
Battery status & Built-in Humidity
Bit(bit) [15:14] [13:0]
Value BAT Status
00(b): Ultra Low ( BAT <= 2.50v)
01(b): Low (2.50v <=BAT <= 2.55v)
10(b): OK (2.55v <= BAT <=2.65v)
11(b): Good (BAT >= 2.65v)
Illumination
Status & Ext Byte
Bits 7 6 5 4 [3:0]
Status&Ext None-
ACK
Flag
Poll
Message
FLAG
Sync
time
OK
Unix Time
Request
Ext:
0b(1001)
Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
Sync time OK: 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N-E5 will set this bit to 0 until got the time stamp from the application server.
Unix Time Request: 1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N-E5 will set this bit to 1 every 10 days to request a time SYNC.
(AT+SYNCMOD to set this)
2.5 Show data on Datacake

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Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 an
see the data in Datacake. Below are the steps:
Step 1: Be sure that your device is programmed and properly connected to the LoRaWAN network.
Step 2: Configure your Application to forward data to Datacake you will need to add integration. Go to TTN V3 Console --> Applications --> Integrations --> Add
Integrations.
Add Datacake:
Select default key as Access Key:
In Datacake console (https://datacake.co/ (https://datacake.co/) ) , add LHT65 device.

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2.6 Datalog Feature
Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LHT65N-E5 will store the
reading for future retrieving purposes. There are two ways for IoT servers to get datalog from LHT65N-E5.
2.6.1 Ways to get datalog via LoRaWAN
There are two methods:
Method 1: IoT Server sends a downlink LoRaWAN command to poll the value for specified time range.
Method 2: Set PNACKMD=1, LHT65N-E5 will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N-E5 will mark these records with non-ack
messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
Note for method 2:
a) LHT65N-E5 will do an ACK check for data records sending to make sure every data arrive server.
b) LHT65N-E5 will send data in CONFIRMED Mode when PNACKMD=1, but LHT65N-E5 won't re-transmit the packet if it doesn't get ACK, it will just mark it as a
NONE-ACK message. In a future uplink if LHT65N-E5 gets a ACK, LHT65N-E5 will consider there is a network connection and resend all NONE-ACK Message.
Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)