Dragino LHT65N-E5 User manual

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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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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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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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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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Note: LHT65N-E5 use same payload decoder as LHT65.

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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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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)

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2.6.2 Unix TimeStamp
LHT65N-E5 uses Unix TimeStamp format based on
User can get this time from link: https://www.epochconverter.com/ (https://www.epochconverter.com/) :
Below is the converter example
So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan -- 29 Friday 03:03:25
2.6.3 Set Device Time
There are two ways to set device's time:
1. Through LoRaWAN MAC Command (Default settings)
User need to set SYNCMOD=1 to enable sync time via MAC command.
Once LHT65N-E5 Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to
LHT65N-E5. If LHT65N-E5 fails to get the time from the server, LHT65N-E5 will use the internal time and wait for next time request (AT+SYNCTDC to set the time reques
period, default is 10 days).
Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot
support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the
packet with time request for TTN V3 v2 if SYNCMOD=1.
2. Manually Set Time
User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
2.6.4 Poll sensor value
User can poll sensor value based on timestamps from the server. Below is the downlink command.

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1byte 4bytes 4bytes 1byte
31 Timestamp start Timestamp end Uplink Interval
Timestamp start and Timestamp end use Unix TimeStamp format as mentioned above. Devices will reply with all data log during this time period, use the uplink interval.
For example, downlink command 31 5FC5F350 5FC6 0160 05
Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
Uplink Internal =5s，means LHT65N-E5 will send one packet every 5s. range 5~255s.
2.6.5 Datalog Uplink payload
The Datalog poll reply uplink will use below payload format.
Retrieval data payload:
Size(bytes) 2 2 2 1 4
Value External
sensor
data
Built In
Temperature
Built-in
Humidity
Poll
message
flag & Ext
Unix
Time
Stamp
Poll message flag & Ext:
Bits 7 6 5 4 [3:0]
Status&Ext No ACK
Flag
Poll
Message
FLAG
Sync
time
OK
Unix Time
Request
Ext:
0b(1001)
No ACK Message: 1: This message means this payload is fromn Uplink Message which doesn't get ACK from the server before ( for PNACKMD=1 feature)
Poll Message Flag: 1: This message is a poll message reply.
Poll Message Flag is set to 1.
Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
For example, in US915 band, the max payload for different DR is:
a) DR0: max is 11 bytes so one entry of data
b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
c) DR2: total payload includes 11 entries of data
d) DR3: total payload includes 22 entries of data.
If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0
Example:
If LHT65N-E5 has below data inside Flash:
If user sends below downlink command: 3160065F9760066DA705
Where : Start time: 60065F97 = time 21/1/19 04:27:03
Stop time: 60066DA7= time 21/1/19 05:27:03
LHT65N-E5 will uplink this payload.

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7FFF089801464160065F97 7FFF 088E 014B 41 60066009
7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1
Where the first 11 bytes is for the first entry:
7FFF089801464160065F97
Ext sensor data=0x7FFF/100=327.67
Temp=0x088E/100=22.00
Hum=0x014B/10=32.6
poll message flag & Ext=0x41,means reply data,Ext=1
Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
2.7 Alarm Mode
when the device is in alarm mode, it checks the built-in sensor temperature for a short time. if the temperature exceeds the preconfigured range, it sends an uplink
immediately.
Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
2.7.1 ALARM MODE
AT+WMOD=1: Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
AT+CITEMP=1: The interval between checking the alarm temperature. (In minutes)
AT+ARTEMP: Gets or sets the alarm range of the internal temperature sensor
AT+ARTEMP=？ : Gets the alarm range of the internal temperature sensor
AT+ARTEMP=45,105: Set the internal temperature sensor alarm range from 45 to 105.
Downlink Command: AAXXXXXXXXXXXXXX
Total bytes: 8 bytes
Example:AA0100010001003C
WMOD=01
CITEMP=0001
TEMPlow=0001
TEMPhigh=003C
2.8 LED Indicator
The LHT65 has a triple color LED which for easy showing different stage .
While user press ACT button, the LED will work as per LED status with ACT button.
In a normal working state:

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For each uplink, the BLUE LED or RED LED will blink once.
BLUE LED when external sensor is connected.
RED LED when external sensor is not connected
For each success downlink, the PURPLE LED will blink once
2.9 installation
3. Sensors and Accessories
3.1 E2 Extension Cable
1m long breakout cable for LHT65N-E5. Features:
Use for AT Command
Update firmware for LHT65N-E5
Exposed All pins from the LHT65N-E5 Type-C connector.

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4. Configure LHT65N-E5 via AT command or LoRaWAN downlink
Use can configure LHT65N-E5 via AT Command or LoRaWAN Downlink.
AT Command Connection: See FAQ.
LoRaWAN Downlink instruction for different platforms: IoT LoRaWAN Server (/xwiki/bin/view/Main/)
There are two kinds of commands to configure LHT65N-E5, they are:
General Commands.
These commands are to configure:
1. General system settings like: uplink interval.
2. LoRaWAN protocol & radio-related commands.
They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note**). These commands can be found on the wiki: End Device Downlink
Command (/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/)
Commands special design for LHT65N-E5
These commands are only valid for LHT65N-E5, as below:
4.1 Set Transmit Interval Time
Feature: Change LoRaWAN End Node Transmit Interval.
AT Command: AT+TDC
Command Example Function Response
AT+TDC? Show current transmit
Interval
30000 OK the interval is
30000ms = 30s
AT+TDC=60000 Set Transmit Interval OK Set transmit interval
to 60000ms = 60 seconds
Downlink Command: 0x01
Format: Command Code (0x01) followed by 3 bytes time value.
If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
Example 1: Downlink Payload: 0100001E // Set Transmit Interval (TDC) = 30 seconds
Example 2: Downlink Payload: 0100003C // Set Transmit Interval (TDC) = 60 seconds
4.2 Currently only supports E5
Feature: Set device password, max 9 digits
AT Command: AT+EXT
Command Example Function Response
AT+EXT=? Get or Set external
sensor model
5
OK
AT+EXT=5 Set external sensor mode to 5
Downlink Command:0xA2
Total bytes: 2 bytes
Example:
0xA205: Set external sensor type to E5
4.3 Set to sleep mode
Feature: Set device to sleep mode
AT+Sleep=0 : Normal working mode, device will sleep and use lower power when there is no LoRa message
AT+Sleep=1 : Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
AT Command: AT+SLEEP
Command Example Function Response

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AT+SLEEP Set to sleep mode Clear all stored sensor data…
OK
Downlink Command:
There is no downlink command to set to Sleep mode.
4.4 Set system time
Feature: Set system time, unix format. See here for format detail.
AT Command:
Command Example Function
AT+TIMESTAMP=1611104352 OK
Set System time to 2021-01-20 00:59:12
Downlink Command:
0x306007806000 // Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
4.5 Set Time Sync Mode
Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
SYNCMOD is set to 1 by default. If user want to set a different time from LoRaWAN server, user need to set this to 0.
AT Command:
Command Example Function
AT+SYNCMOD=1 Enable Sync system time via LoRaWAN MAC
Command (DeviceTimeReq)
Downlink Command:
0x28 01 // Same As AT+SYNCMOD=1
0x28 00 // Same As AT+SYNCMOD=0
4.6 Set Time Sync Interval
Feature: Define System time sync interval. SYNCTDC default value: 10 days.
AT Command:
Command Example Function
AT+SYNCTDC=0x0A Set SYNCTDC to 10 (0x0A), so the sync time is
10 days.
Downlink Command:
0x29 0A // Same as AT+SYNCTDC=0x0A
4.7 Print data entries base on page.
Feature: Print the sector data from start page to stop page (max is 416 pages).
AT Command: AT+PDTA

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Downlink Command:
No downlink commands for feature
4.8 Print last few data entries.
Feature: Print the last few data entries
AT Command: AT+PLDTA
Downlink Command:
No downlink commands for feature
4.9 Clear Flash Record
Feature: Clear flash storage for data log feature.
AT Command: AT+CLRDTA
Command Example Function Response
AT+CLRDTA Clear date record Clear all stored sensor data…
OK
Downlink Command: 0xA3
Example: 0xA301 // Same as AT+CLRDTA
4.10 Auto Send None-ACK messages
Feature: LHT65N-E5 will wait for ACK for each uplink, If LHT65N-E5 doesn't get ACK from the IoT server, it will consider the message doesn't arrive server and store it.
LHT65N-E5 keeps sending messages in normal periodically. Once LHT65N-E5 gets ACK from a server, it will consider the network is ok and start to send the not-arrive
message.
AT Command: AT+PNACKMD
The default factory setting is 0

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Command Example Function Response
AT+PNACKMD=1 Poll None-ACK
message
OK
Downlink Command: 0x34
Example: 0x3401 // Same as AT+PNACKMD=1
5. Battery & How to replace
5.1 Battery Type
LHT65N-E5 is equipped with a 2400mAH Li-MnO2 (CR17505) battery . The battery is an un-rechargeable battery with low discharge rate targeting for up to 8~10 years
use. This type of battery is commonly used in IoT devices for long-term running, such as water meters.
The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
The minimum Working Voltage for the LHT65N-E5 is ~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
5.2 Replace Battery
LHT65N-E5 has two screws on the back, Unscrew them, and changing the battery inside is ok. The battery is a general CR17450 battery (3.0v). Any brand should be ok.
5.3 Battery Life Analyze
Dragino battery-powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimated battery life:
https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
(https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf)
A full detail test report for LHT65N-E5 on different frequency can be found at : https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0
(https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0)
6. FAQ
6.1 How to use AT Command?
LHT65N-E5 supports AT Command set.User can use a USB to TTL adapter plus the Program Cable to connect to LHT65 for using AT command, as below.

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In PC, User needs to set serial tool(such as putty (https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html) , SecureCRT) baud rate to 9600 to access to access
serial console for LHT65N-E5. The AT commands are disable by default and need to enter password (default:123456) to active it. Timeout to input AT Command is 5 min,
after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.

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AT Command List is as below:
AT+<CMD>? : Help on <CMD>
AT+<CMD> : Run <CMD>
AT+<CMD>=<value> : Set the value
AT+<CMD>=? : Get the value
AT+DEBUG: Set more info output
ATZ: Trig a reset of the MCU
AT+FDR: Reset Parameters to Factory Default, Keys Reserve
AT+DEUI: Get or Set the Device EUI
AT+DADDR: Get or Set the Device Address
AT+APPKEY: Get or Set the Application Key
AT+NWKSKEY: Get or Set the Network Session Key
AT+APPSKEY: Get or Set the Application Session Key
AT+APPEUI: Get or Set the Application EUI
AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)
AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
AT+PNM: Get or Set the public network mode. (0: off, 1: on)
AT+RX2FQ: Get or Set the Rx2 window frequency
AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
AT+NWKID: Get or Set the Network ID
AT+FCU: Get or Set the Frame Counter Uplink
AT+FCD: Get or Set the Frame Counter Downlink