Dragino LHT65N User Manual

User Manual for LoRaWAN End Nodes - LHT65N LoRaWAN Temperature & Humidity Sensor Manual
Table of Contents
1. Introduction .......................................................................................................................................................................... 5
1.1 What is LHT65N Temperature & Humidity Sensor .................................................................................................. 5
1.2 Features .......................................................................................................................................................................... 5
1.3 Specification ................................................................................................................................................................... 5
2. Connect LHT65N to IoT Server ....................................................................................................................................... 6
2.1 How does LHT65N work? ........................................................................................................................................... 6
2.2 How to Activate LHT65N? ........................................................................................................................................... 6
2.3 Example to join LoRaWAN network ........................................................................................................................... 7
2.3.1 Step 1: Create Device n TTN ................................................................................................................................ 7
2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. .......................................... 12
2.4 Uplink Payload ............................................................................................................................................................. 12
2.4.1 Decoder in TTN V3 ............................................................................................................................................... 13
2.4.2 BAT-Battery Info .................................................................................................................................................... 13
2.4.3 Built-in Temperature ............................................................................................................................................. 14
2.4.4 Built-in Humidity ..................................................................................................................................................... 15
2.4.5 Ext # ........................................................................................................................................................................ 15
2.4.6 Ext value ................................................................................................................................................................. 15
2.5 Show data on Datacake ............................................................................................................................................. 17
2.6 Datalog Feature ........................................................................................................................................................... 20
2.6.1 Ways to get datalog via LoRaWAN .................................................................................................................... 20
2.6.2 Unix TimeStamp .................................................................................................................................................... 20
2.6.3 Set Device Time .................................................................................................................................................... 21
2.6.4 Poll sensor value ................................................................................................................................................... 21
2.6.5 Datalog Uplink payload ........................................................................................................................................ 22
2.7 Alarm Mode ................................................................................................................................................................. 24
2.8 LED Indicator ............................................................................................................................................................... 25
2.9 installation ..................................................................................................................................................................... 25
3. Sensorsand Accessories ................................................................................................................................................ 26
3.1E2 Extension Cable ..................................................................................................................................................... 26
3.2E3 Temperature Probe ............................................................................................................................................... 26
4. Configure LHT65N via AT command or LoRaWAN downlink .................................................................................... 27
4.1 Set Transmit Interval Time ........................................................................................................................................ 27
4.2 Set External Sensor Mode ......................................................................................................................................... 28
4.3 Enable/Disable uplink Temperature probe ID ......................................................................................................... 28
4.4 Set Password .............................................................................................................................................................. 29
4.5 Quit AT Command ...................................................................................................................................................... 29
4.6 Set to sleep mode ....................................................................................................................................................... 30
4.7 Set system time ........................................................................................................................................................... 30
4.8 Set Time Sync Mode .................................................................................................................................................. 30
4.9 Set Time Sync Interval ............................................................................................................................................... 31
4.10 Print data entries base on page. ............................................................................................................................. 31
4.11 Print last few data entries. ....................................................................................................................................... 32
4.12 Clear Flash Record ................................................................................................................................................... 33
4.13 Auto Send None-ACK messages ........................................................................................................................... 33
5. Battery & How to replace ................................................................................................................................................ 34
5.1 Battery Type ................................................................................................................................................................ 34
5.2 Replace Battery ........................................................................................................................................................... 34
5.3 Battery Life Analyze .................................................................................................................................................... 35
6. FAQ .................................................................................................................................................................................... 35
6.1 How to use AT Command? ....................................................................................................................................... 35
6.2 Where to use AT commands and Downlink commands ........................................................................................ 39
6.3How to change the uplink
interval？
...................................................................................................................... 43
6.4How to use TTL-USB to connect a PC to input AT commands? .......................................................................... 44
Page 1 / 56 - last modified by Bei Jinggeng on 2022/07/06 13:48

Dragino LHT65N Specifications

General

Model	LHT65N
Category	Measuring Instruments
Humidity Range	0% to 100% RH
Humidity Accuracy	±3% RH
Battery	Yes
Battery Life	Up to 10 years
LoRaWAN Class	Class A
Ingress Protection	Yes
IP Rating	IP65
Communication	LoRaWAN
Communication Protocol	LoRaWAN
Type	Temperature and Humidity Sensor
Frequency	EU868
Temperature Range	-40°C to 80°C
Operating Temperature	-40°C to 80°C
Frequency Band	EU868, US915, AS923

Summary

Introduction to LHT65N Sensor

What is LHT65N Temperature & Humidity Sensor

The Dragino LHT65N is a Long Range LoRaWAN Sensor with built-in and external sensor connectors.

LHT65N Features Overview

Lists key features: wall mountable, LoRaWAN v1.0.3 Class A, AT commands, remote configuration, firmware upgrade.

LHT65N Sensor Specifications

Details specs for built-in/external temp/humidity sensors, including resolution, accuracy, and operating range.

Connecting LHT65N to IoT Server

How LHT65N Works

Explains LHT65N operates in LoRaWAN OTAA Class A mode, automatically joining networks and sending data.

Activating the LHT65N Device

Describes two modes: Deep Sleep Mode for storage and Working Mode for network operation.

Joining LoRaWAN Network Example

Illustrates joining the TTN V3 LoRaWAN IoT server with a diagram and steps.

Understanding Uplink Payload

Details the uplink payload structure, typically 11 bytes, sent every 20 minutes.

LHT65N Datalog Feature

Explains the Datalog feature for storing data when the network is unavailable.

LHT65N Alarm Mode Configuration

Describes alarm mode for temperature alerts and related AT commands.

Sensors and Accessories for LHT65N

E2 Extension Cable Details

Details E2 extension cable features and pin mapping for AT commands and firmware updates.

E3 Temperature Probe Specifications

Introduces the E3 temperature probe with its specifications.

Configuring LHT65N via AT Command or LoRaWAN Downlink

Setting Transmit Interval Time

Explains how to change the LoRaWAN transmit interval using AT commands or downlink.

Configuring External Sensor Mode

Describes how to set the external sensor mode using AT commands or downlink.

Setting Device Password

Details setting a device password using AT commands.

Setting LHT65N Sleep Mode

Describes setting the device to normal or deep sleep modes using AT commands.

Clearing Flash Data Records

Explains clearing the flash storage for data logging using AT commands.

LHT65N Battery Information and Replacement

LHT65N Battery Type

Identifies the battery type (CR17505) and provides discharge performance graphs.

Replacing the LHT65N Battery

Guides on replacing the battery, mentioning required screws and battery type.

Analyzing LHT65N Battery Life

Provides links to resources for analyzing estimated battery life.

Frequently Asked Questions (FAQ)

Using AT Commands with LHT65N

Explains connecting to the LHT65 using a USB to TTL adapter for AT commands.

AT Commands via TTL-USB Connection

Details the physical connection using TTL-USB for AT command input.

Firmware Upgrade via TTL-USB

Guides on using TTL-USB for firmware upgrades, including software installation.

Firmware Upgrade via USB-TYPE-C

Details using USB-TYPE-C for firmware upgrades, including wiring and software steps.

Order Information

Packing Information

Reference Materials

FCC Compliance Warning