LHT65S-PIR -- Temperature/Humidity/PIR Motion Sensor User Manual

Last modified by Xiaoling on 2023/08/08 15:57

Table of Contents:

1. Introduction
2. Connect LHT65S-PIR to IoT Server
3. Sensors and Accessories
- 3.1 E2 Extension Cable
4. Configure LHT65S-PIR
5. Battery & Power Consumption
6. OTA firmware update
7. FAQ
8. Order Info
9. Packing Info
10. Reference material
11. FCC Warning

1. Introduction

1.1 What is LHT65S-PIR Temperature,Humidity & PIR Sensor

The Dragino LHT65S-PIR Temperature, Humidity & PIR sensor is a Long Range LoRaWAN Sensor.It includes a built-in Temperature & Humidity sensor and has an external PIR Probe. LHT65S-PIR can detect environment Temperature & Humdity, it also detects People Activity via PIR probe and them send these info to LoRaWAN IoT Server.

The LHT65S-PIR 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.

LHT65S-PIR has a built-in 2400mAh non-chargeable battery which can be used for more than 5 years*.

LHT65S-PIR supports wireless configure & OTA update which make user easy to use.

LHT65S-PIR 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
Support wireless OTA update firmware
Firmware upgradeable via program port
Built-in 2400mAh battery for up to 5 years of use.
Built-in Temperature & Humidity sensor
External PIR Sensor
Tri-color LED to indicate working status

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

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 PIR Sensor:

Base on RDB223 Sensor
Cable Length : 1 meter
Stable detect distance : 0~3 meter

2. Connect LHT65S-PIR to IoT Server

2.1 How does LHT65S-PIR work?

LHT65S-PIR is configured as LoRaWAN OTAA Class A sensor by default. Each LHT65S-PIR is shipped with a worldwide unique set of OTAA keys. To use LHT65S-PIR in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65S-PIR.

If LHT65S-PIR is within the coverage of this LoRaWAN network. LHT65S-PIR can join the LoRaWAN network automatically. After successfully joining, LHT65S-PIR will start to measure environment temperature, humidity & people activity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.

2.2 How to Activate LHT65S-PIR?

The LHT65S-PIR has two working modes:

Deep Sleep Mode: LHT65S-PIR doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.

Working Mode: In this mode, LHT65S-PIR works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65S-PIR will be in STOP mode (IDLE mode), in STOP mode, the PIR sensor is still working to detect people activity in low power consumption.

The LHT65S-PIR 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 LHT65S-PIR is already Joined to rhe LoRaWAN network, LHT65S-PIR will send an uplink packet, if LHT65S-PIR has external sensor connected,Blue led will blink once. If LHT65S-PIR has not external sensor, Red led will blink once.
Pressing ACT for more than 3s	Active Device	Green led will fast blink 5 times, LHT65S-PIR will enter working mode and start to JOIN LoRaWAN network. Green led will solidly turn on for 5 seconds after join in network.
Fast press ACT 5 times.	Deactivate Device	Red led will solid on for 5 seconds. Means LHT65S-PIR 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, So it provides network coverage for LHT65S-PIR. Next we need to add the LHT65S-PIR device in TTN V3:

2.3.1 Step 1: Create Device n TTN

Create a device in TTN V3 with the OTAA keys from LHT65S-PIR.

Each LHT65S-PIR 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.

Note: LHT65S-PIR use same payload decoder as LHT65.

Input APP EUI, APP KEY and DEV EUI:

2.3.2 Step 2: Activate LHT65S-PIR by pressing the ACT button for more than 5 seconds.

Use ACT button to activate LHT65S-PIR 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--Device Status, (Fport=5)

Users can use the downlink command(0x26 01) to ask LHT65S-PIR to send device configure detail, include device configure status. LHT65S-PIR will uplink a payload via FPort=5 to server.

The Payload format is as below.

Device Status (FPORT=5)
Size (bytes)	1	2	1	1	2
Value	Sensor Model	Firmware Version	Frequency Band	Sub-band	BAT

Example parse in TTNv3

Sensor Model: For LHT65S-PIR, this value is 0x1A

Firmware Version: 0x0100, Means: v1.0.0 version

Frequency Band:

*0x01: EU868

*0x02: US915

*0x03: IN865

*0x04: AU915

*0x05: KZ865

*0x06: RU864

*0x07: AS923

*0x08: AS923-1

*0x09: AS923-2

*0x0a: AS923-3

*0x0b: CN470

*0x0c: EU433

*0x0d: KR920

*0x0e: MA869

Sub-Band:

AU915 and US915: value 0x00 ~ 0x08

CN470: value 0x0B ~ 0x0C

Other Bands: Always 0x00

Battery Info:

Check the battery voltage.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

2.5 Uplink Payload, Sensor Data ( 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 LHT65S-PIR.
The 7th byte (EXT #): defines the external sensor model. It can be 0x0A for LHT65S-PIR
The 8^th byte: Alarm Bit (if this uplink is from periodically or movement)
The 9^th ~ 11^st byte: Movement Detect Count.

2.5.1 Decoder in TTN V3

When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65S-PIR decoder in TTNv3 for friendly reading.

Below is the position to put the decoder and LHT65S-PIR decoder can be download from here: https://github.com/dragino/dragino-end-node-decoder

2.5.2 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 LHT65S-PIR.

BAT status=(0xcba4>>14)&0xFF=11(B)，very good
Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV

2.5.3 Built-in Temperature

Temperature: 0x0ABB/100=27.47℃

Temperature: (0xF5C6-65536)/100=-26.18℃

2.5.4 Built-in Humidity

Humidity: 0x025C/10=60.4%

2.5.5 Ext value

2.5.5.1 Ext=0x0E, PIR Sensor

2.5.5.2 Ext Value

There are 4 bytes in Ext Value field.

Bit0 of byte 8th shows if this uplink is generate by PIR activity.

The 8^th byte	Bit 1~7	Bit 0
Value	Reserve	0: Normal Uplink 1: Uplink by activity detected

Note: Uplink by activity is disable by default.

The 9^th ~ 11^st byte: Movement Detect Count.

0x00 E5 09 : Total detect 58633 activity since end node start.

2.6 Show data on Datacake

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 and 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/) , add LHT65 device.

2.7 LED Indicator

The LHT65S-PIR 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:

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

2.8 installation

1. Don't install LHT65S-PIR outdoor or place where will get wet.

2. Towards the PIR probe to the place where need to monitor activity. Below is the detect beam.

Stable distance is 0~3m. Some motion might not detected between 3~5 m.

Notice: PIR can only detect motion activity, not to use to detect static people case.

1. PIR Motion Detector should not be installed near the Air conditioner places where with cold wind or hot wind flow, because PIR motion detector is sensitive with the temperature changes of the environment. Environment changes quickly will cause a false alarm.

2. PIR should not be installed facing the glass window, facing glass window will be interfered by the outside sunlight and moving objects (people or vehicle). The infrared energy can penetrate the glass window.

3. PIR should not be installed facing the moving objects or background changing objects, movement object will cause airflow change, it may cause false alarm.

4. Between the detection range of PIR Motion detector, there is should be less objects. Many objects may reduce the sensitive of detection range.

5. Do not install more than one (2 or above) Wireless PIR in the same detection space (like at the same room).

3. Sensors and Accessories

3.1 E2 Extension Cable

1m long breakout cable for LHT65S-PIR. Features:

Use for AT Command
Update firmware for LHT65S-PIR

4. Configure LHT65S-PIR

4.1 Configure Methods:

LHT65S-PIR supports below configure method:

AT Command via UART Connection : See FAQ.

LoRaWAN Downlink. Instruction for different platforms: See IoT LoRaWAN Server section.

4.2 General Commands

These commands are to configure:

General system settings like: uplink interval.
LoRaWAN protocol & radio related command.

They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:

http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/

4.3 Commands special design for LHT65S-PIR

These commands only valid for LHT65S-PIR, as below:

4.3.1 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 Payload: 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

4.3.2 Get Device Status

Send a LoRaWAN downlink to ask device send Alarm settings.

Downlink Payload: 0x26 01

Sensor will upload Device Status via FPORT=5. See payload section for detail.

4.3.3 Set Password

Feature: Set device password, max 9 digits

AT Command: AT+PWORD

Command Example	Function	Response
AT+PWORD=?	Show password	123456 OK
AT+PWORD=999999	Set password	OK

Downlink Command:

No downlink command for this feature.

4.3.4 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
AT+SLEEP	Set to sleep mode	Clear all stored sensor data… OK

Downlink Command:

There is no downlink command to set to Sleep mode.

4.3.5 Set UOA (Uplink on Activity)

Feature: Enable / Disable Uplink on Activity

AT+UOA=0 : Disable UoA

AT+UOA=1,2 : Enable UoA , Calm Down Time: 2 minutes. If device already send a uplink on activity, it will not send another uplink on activiy in 2 minutes, even detect activity.

Notice: Calm Down time range is 1 ~ 65535 minutes. If user set Calm Down time to low value, such as 1 minute, the sensor might send uplink very frequenctly and battery drain fast.

AT Command: AT+UOA

Downlink Command: xxxxxxx

5. Battery & Power Consumption

LHT65S-PIR use CR17450 battery pack. See below link for detail information about the battery info and how to replace.

Battery Info & Power Consumption Analyze .

6. OTA firmware update

User can change firmware LHT65S-PIR to:

Change Frequency band/ region.
Update with new features.
Fix bugs.

Firmware and changelog can be downloaded from : Firmware download link

Methods to Update Firmware:

(Recommanded way) OTA firmware update via wireless: http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/
Update through UART TTL interface. Instruction.

7. FAQ

7.1 How to use AT Command?

LHT65S-PIR 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.

In PC, User needs to set serial tool(such as putty, SecureCRT) baud rate to 9600 to access to access serial console for LHT65S-PIR. 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.

7.2 Where to use AT commands and Downlink commands

AT commands：

Downlink commands:

TTN:

Helium：

Chirpstack: The downlink window will not be displayed until the network is accessed

Aws:

7.3 How to change the uplink interval？

Please see this link: http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/

7.4 How to use TTL-USB to connect PC to upgrade firmware?

Step1: Install TremoProgrammer first.

Step2：wiring method.

First connect the four lines；

，

Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.

Step3：Select the device port to be connected, baud rate and bin file to be downloaded.

Click the start button to start the firmware upgrade.

When this interface appears, it indicates that the download has been completed.

Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.

8. Order Info

Part Number: LHT65S-PIR-XX

XX : The default frequency band

AS923: LoRaWAN AS923 band
AU915: LoRaWAN AU915 band
EU433: LoRaWAN EU433 band
EU868: LoRaWAN EU868 band
KR920: LoRaWAN KR920 band
US915: LoRaWAN US915 band
IN865: LoRaWAN IN865 band
CN470: LoRaWAN CN470 band

9. Packing Info

Package Includes:

LHT65S-PIR Temperature/Humidity/PIR Sensor x 1

10. Reference material

Datasheet, photos, decoder, firmware

11. FCC Warning

This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:

(1) This device may not cause harmful interference；

(2) this device must accept any interference received, including interference that may cause undesired operation.

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