PIR Motion Sensor User Manual

Last modified by Xiaoling on 2025/06/10 09:17

From 45.3 to 45.4 From 48.1 to 48.2

From version 45.4

edited by Xiaoling
on 2023/05/27 08:48

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To version 48.1

edited by Mengting Qiu
on 2024/01/16 17:54

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@@ -1,1 +1,1 @@
--XWiki.Xiaoling
++XWiki.ting

Content

@@ -72,7 +72,6 @@
  * Stable detect distance : 0~~3 meter
--
  = 2. Connect LHT65N-PIR to IoT Server =
  == 2.1 How does LHT65N-PIR work? ==
@@ -99,18 +99,21 @@
  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
--|=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
++|=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on **ACT|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)Function|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)Action
  |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Test uplink status|(% style="background-color:#f2f2f2; width:225px" %)(((
--If LHT65N is already Joined to rhe LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has external sensor connected,(% style="color:blue" %)**Blue led** (%%)will blink once. If LHT65N has not external sensor, (% style="color:red" %)**Red led**(%%) will blink once.
++
++
++If LHT65N-PIR is already Joined to rhe LoRaWAN network, LHT65N-PIR will send an uplink packet, if LHT65N-PIR has external sensor connected,Blue led will blink once. If LHT65N-PIR has not external sensor, Red led will blink once.
  )))
  |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
--(% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
--(% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
++
++
++Green led will fast blink 5 times, LHT65N-PIR will enter working mode and start to JOIN LoRaWAN network.
++Green led will solidly turn on for 5 seconds after join in network.
  )))
--|(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means LHT65N is in Deep Sleep Mode.
++|(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)Red led will solid on for 5 seconds. Means LHT65N-PIR is in Deep Sleep Mode.
--
  == 2.3 Example to join LoRaWAN network ==
@@ -166,10 +166,10 @@
  Use ACT button to activate LHT65N-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.
--[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N-E5%20LoRaWAN%20Temperature_Humidity%20%26%20Illuminance%20Sensor%20User%20Manual/WebHome/image-20220522233300-8.png?rev=1.1||alt="image-20220522233300-8.png"]]
++[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N-E5%20LoRaWAN%20Temperature_Humidity%20%26%20Illuminance%20Sensor%20User%20Manual/WebHome/image-20220522233300-8.png?rev=1.1||alt="image-20220522233300-8.png" height="378" width="1248"]]
--== 2.4 Uplink Payload~-~-Device Status, (Fport~=5) ==
++== 2.4 Uplink Payload~-~-Device Status, (Fport~=5)(% style="display:none" %) (%%) ==
  Users can use the downlink command(**0x26 01**) to ask LHT65N-PIR to send device configure detail, include device configure status. LHT65N-PIR will uplink a payload via FPort=5 to server.
@@ -183,7 +183,7 @@
  Example parse in TTNv3
--[[image:image-20230508151932-1.png]]
++[[image:image-20230508151932-1.png||height="213" width="1245"]]
  (% style="color:blue" %)**Sensor Model**(%%): For LHT65N-PIR, this value is 0x1A
@@ -192,34 +192,35 @@
  (% style="color:blue" %)**Frequency Band**:
--*0x01: EU868
++0x01: EU868
--*0x02: US915
++0x02: US915
--*0x03: IN865
++0x03: IN865
--*0x04: AU915
++0x04: AU915
--*0x05: KZ865
++0x05: KZ865
--*0x06: RU864
++0x06: RU864
--*0x07: AS923
++0x07: AS923
--*0x08: AS923-1
++0x08: AS923-1
--*0x09: AS923-2
++0x09: AS923-2
--*0x0a: AS923-3
++0x0a: AS923-3
--*0x0b: CN470
++0x0b: CN470
--*0x0c: EU433
++0x0c: EU433
--*0x0d: KR920
++0x0d: KR920
--*0x0e: MA869
++0x0e: MA869
++
  (% style="color:blue" %)**Sub-Band**:
  AU915 and US915: value 0x00 ~~ 0x08
@@ -228,6 +228,7 @@
  Other Bands: Always 0x00
++
  (% style="color:blue" %)**Battery Info**:
  Check the battery voltage.
@@ -259,7 +259,7 @@
  **4**
  )))
  |(% style="width:97px" %)(((
--**Value**
++Value
  )))|(% style="width:39px" %)(((
  [[BAT>>||anchor="H2.5.2BAT-BatteryInfo"]]
  )))|(% style="width:100px" %)(((
@@ -281,6 +281,7 @@
  * 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 ===
@@ -302,7 +302,7 @@
  **Bit(bit)**
  )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
  |(% style="width:66px" %)(((
--**Value**
++Value
  )))|(% style="width:250px" %)(((
  BAT Status
 (b): Ultra Low ( BAT <= 2.50v)
@@ -319,8 +319,10 @@
  * BAT status=(0xcba4>>14)&0xFF=11(B)，very good
  * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
++
  === 2.5.3 Built-in Temperature ===
++
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
  * Temperature:  0x0ABB/100=27.47℃
@@ -329,18 +329,21 @@
  * Temperature:  (0xF5C6-65536)/100=-26.18℃
++
  === 2.5.4 Built-in Humidity ===
++
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
  * Humidity:    0x025C/10=60.4%
++
  === 2.5.5 Ext value ===
  ==== 2.5.5.1 Ext~=0x0E, PIR Sensor ====
--[[image:ext=14.png||alt="image-20221224161634-2.png"]]
++[[image:ext=14.png||alt="image-20221224161634-2.png" height="166" width="1252"]]
  ==== 2.5.5.2 Ext Value ====
@@ -405,11 +405,195 @@
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20221224161957-6.png||height="306" width="852"]]
++== 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
--== 2.7 LED Indicator ==
++(((
++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.
++)))
++(((
++(% style="color:red" %)**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 ( Since v1.3.1 firmware) ===
++
++
++**Internal GXHT30 temperature alarm(Acquisition time: fixed at one minute)**
++
++(((
++(% class="box infomessage" %)
++(((
++**AT+WMOD=3**:              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
++
++(% _mstmutation="1" %)**AT+ARTEMP=? **(%%):          Gets the alarm range of the internal temperature sensor(% style="display:none" %)
++
++**AT+ARTEMP=45,105**:   Set the internal temperature sensor alarm range from 45 to 105.
++
++**AT+LEDALARM=1** :       Enable LED visual Alarm.
++)))
++)))
++
++(% style="color:#4f81bd" %)**Downlink Command:**
++
++AT+WMOD=1:  A501    ,     AT+WMOD=0 :   A600
++
++AT+CITEMP=1 : A60001
++
++AT+ARTEMP=1,60  :  A70001003C
++
++AT+ARTEMP=-16,60 :  A7FFF0003C
++
++AT+LEDALARM=1  :  3601
++
++
++(% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
++
++Total bytes: 8 bytes
++
++**Example: **AA0100010001003C
++
++WMOD=01
++
++CITEMP=0001
++
++TEMPlow=0001
++
++TEMPhigh=003C
++
++
++**DS18B20 and TMP117 Threshold Alarm**
++
++**~ AT+WMOD=1,60,-10,20**
++
++(% style="color:#4f81bd" %)**Downlink Command:**
++
++**Example: **A5013CFC180014
++
++MOD=01
++
++CITEMP=3C(S)
++
++TEMPlow=FC18
++
++TEMPhigh=0014
++
++
++**Fluctuation alarm for DS18B20 and TMP117(Acquisition time: minimum 1s)**
++
++**AT+WMOD=2,60,5**
++
++(% style="color:#4f81bd" %)**Downlink Command:**
++
++**Example: **A5023C05
++
++MOD=02
++
++CITEMP=3C(S)
++
++temperature fluctuation=05
++
++
++**Sampling multiple times and uplink together**
++
++**AT+WMOD=3,1,60,20,-16,32,1**
++
++Explain:
++
++* (% style="color:#037691" %)**parameter1: **(%%)Set Working Mode to **Mode 3**
++* (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
++* (% style="color:#037691" %)**parameter3: **(%%)Sampling Interval is **60**s.
++* (% style="color:#037691" %)**parameter4: **(%%)When there is **20** sampling dats, Device will send these data via one uplink. (max value is 60, means max 60 sampling in one uplink)
++* (% style="color:#037691" %)**parameter5 & parameter6: **(%%)Temperature alarm range is **-16** to **32**°C,
++* (% style="color:#037691" %)**parameter7:**(%%) 1 to enable temperature alarm, **0** to disable the temperature alarm. If alarm is enabled, a data will be sent immediately  if temperate exceeds the Alarm range.
++
++(% style="color:#4f81bd" %)**Downlink Command:**
++
++**Example: **A50301003C14FFF0002001
++
++MOD=03
++
++TEMP=DS18B20
++
++CITEMP=003C(S)
++
++Total number of acquisitions=14
++
++TEMPlow=FFF0
++
++TEMPhigh=0020
++
++ARTEMP=01
++
++
++**Uplink payload( Fport=3)**
++
++**Example: CBEA**01**0992**//0A41//**09C4**
++
++BatV=CBEA
++
++TEMP=DS18B20
++
++Temp1=0992   ~/~/ 24.50℃
++
++Temp2=0A41   ~/~/ 26.25℃
++
++Temp3=09C4   ~/~/ 25.00℃
++
++(% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
++
++(% style="color:red" %)**           In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
++)))
++
++
++=== 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
++
++
++(% class="box infomessage" %)
++(((
++(((
++**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
++)))
++
++(((
++(% _mstmutation="1" %)**AT+ARTEMP=? **(%%):          Gets the alarm range of the internal temperature sensor(% style="display:none" %)
++)))
++
++(((
++**AT+ARTEMP=45,105**:   Set the internal temperature sensor alarm range from 45 to 105.
++)))
++)))
++
++(% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
++
++Total bytes: 8 bytes
++
++**Example:**AA0100010001003C
++
++WMOD=01
++
++CITEMP=0001
++
++TEMPlow=0001
++
++TEMPhigh=003C
++
++
++== 2.8 LED Indicator ==
++
++
  The LHT65N-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.
@@ -421,9 +421,10 @@
  * (% style="color:red" %)**RED LED**(%%) when external sensor is not connected
  * For each success downlink, the (% style="color:purple" %)**PURPLE LED**(%%) will blink once
--== 2.8 installation ==
++== 2.9 installation ==
++
  ~1. Don't install LHT65N-PIR outdoor or place where will get wet.
 . Towards the PIR probe to the place where need to monitor activity. Below is the detect beam.
@@ -445,6 +445,7 @@
  * 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 ==
@@ -476,6 +476,7 @@
  * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>url:http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
++
  == 4.2 General Commands ==
@@ -500,11 +500,11 @@
  Feature: Change LoRaWAN End Node Transmit Interval.
--(% style="color:#4f81bd" %)**AT Command: AT+TDC**
++(% style="color:#4f81bd" %)**AT Command: **
  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
  |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:166px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:180px" %)**Response**
--|(% style="width:155px" %)AT+TDC?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
++|(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
  |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
  (% style="color:#4f81bd" %)**Downlink Payload: 0x01**
@@ -517,6 +517,7 @@
  * **Example 2**: Downlink Payload: 0100003C         ~/~/ Set Transmit Interval (TDC) = 60 seconds
++
  === 4.3.2 Get Device Status ===
@@ -532,7 +532,7 @@
  Feature: Set device password, max 9 digits
--(% style="color:#4f81bd" %)**AT Command: AT+PWORD**
++(% style="color:#4f81bd" %)**AT Command: **
  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
  |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:128px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:89px" %)**Response**
@@ -553,11 +553,11 @@
  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
++* (% style="color:#037691" %)**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.
++* (% style="color:#037691" %)**AT+Sleep=1**(%%) :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
--(% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
++(% style="color:#4f81bd" %)**AT Command: **
  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
  |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:140px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:218px" %)**Response**
@@ -571,23 +571,43 @@
  * 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
++(% style="color:#4f81bd" %)**AT Command: **
--* **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.
++* (% style="color:#037691" %)**AT+UOA=0**(%%)  : Disable UoA
++* (% style="color:#037691" %)**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.
++
  (% style="color:red" %)**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.**
--(% style="color:#4f81bd" %)**AT Command: AT+UOA**
++(% style="color:#4f81bd" %)**Downlink Command:**
--(% style="color:#4f81bd" %)**Downlink Command:  **(% class="mark" %)**xxxxxxx**
++Format: Command Code (0xA1) followed by 1 byte or 3 bytes.
++When followed by 3 bytes, the first byte is 01, and the second and third bytes are Calm Down Time.
++* (% style="color:#037691" %)**A1 00    **(%%)**         ==>    AT+UOA=0     **
++* (% style="color:#037691" %)**A1 01 00 02  **(%%)** ==>    AT+UOA=1,2**
++
++
++=== 4.3.6 Get data ===
++
++
++Feature: Get the current sensor data
++
++(% style="color:#4f81bd" %)**AT Command:**
++
++       **AT+GETSENSORVALUE=0**      ~/~/ The serial port gets the reading of the current sensor
++
++       **AT+GETSENSORVALUE=1**      ~/~/  The serial port gets the current sensor reading and uploads it.
++
++
  = 5. Battery & Power Consumption =
@@ -612,6 +612,7 @@
  * (Recommanded way) OTA firmware update via wireless: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]
  * Update through UART TTL interface. **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**.
++
  = 7. FAQ =
  == 7.1 How to use AT Command? ==
@@ -623,7 +623,6 @@
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220615153355-1.png||_mstalt="430222"]]
--
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@1655802313617-381.png||_mstalt="293917"]]
@@ -684,10 +684,12 @@
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220615153355-1.png||_mstalt="430222"]]
++
  (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220615170542-5.png||_mstalt="430638"]]
++
  (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
  First connect the four lines；(% style="display:none" %)
@@ -700,7 +700,6 @@
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220621170938-2.png||_mstalt="431704"]]
--
  (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220615171334-6.png||_mstalt="431028"]]
@@ -716,8 +716,6 @@
  Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
--
--
  [[image:Main.User Manual for LoRaWAN End Nodes.LHT65N-E5 LoRaWAN Temperature_Humidity & Illuminance Sensor User Manual.WebHome@image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
@@ -737,6 +737,7 @@
  * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
  * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
++
  = 9. Packing Info =
@@ -744,16 +744,13 @@
  * LHT65N-PIR Temperature/Humidity/PIR Sensor x 1
--**Dimension and weight**:
--* Device Size:  10 x 10 x 3.5 mm
--* Device Weight: 120.5g
--
  = 10. Reference material =
  * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
++
  = 11. FCC Warning =
@@ -762,3 +762,6 @@
  (1) This device may not cause harmful interference；
  (2) this device must accept any interference received, including interference that may cause undesired operation.
++
++
++

Changes for page LHT65N-PIR Temperature/Humidity/PIR Motion Sensor User Manual

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