Changes for page LMDS200 -- LoRaWAN Microwave Radar Distance Sensor User Manual

Last modified by Xiaoling on 2025/04/27 16:45

From 147.2 to 147.1 From 151.1 to 150.62

From version 150.62

edited by Xiaoling
on 2022/06/11 09:25

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To version 147.2

edited by Xiaoling
on 2022/06/10 17:34

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@@ -3,7 +3,6 @@
  **Contents:**
--{{toc/}}
@@ -11,7 +11,6 @@
--
  = 1.  Introduction =
  == 1.1  What is LoRaWAN Distance Detection Sensor ==
@@ -20,51 +20,24 @@
  (((
--(((
  The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
--)))
--(((
--
--)))
--(((
  It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
--)))
--(((
--
--)))
--(((
  The LoRa wireless technology used in LDDS75 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
--)))
--(((
--
--)))
--(((
  LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
--)))
--(((
--
--)))
--(((
  Each LDDS75 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
--)))
--(((
--
--)))
--(((
--(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
++(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
  )))
  )))
--)))
  [[image:1654847051249-359.png]]
@@ -86,6 +86,7 @@
  * IP66 Waterproof Enclosure
  * 4000mAh or 8500mAh Battery for long term use
++
  == 1.3  Specification ==
  === 1.3.1  Rated environmental conditions ===
@@ -92,12 +92,12 @@
  [[image:image-20220610154839-1.png]]
--(((
--**Remarks: (1)  a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
--)))
++**Remarks: (1)  a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
++**b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
++
  === 1.3.2  Effective measurement range Reference beam pattern ===
  **(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
@@ -107,10 +107,7 @@
  [[image:1654852253176-749.png]]
--
--(((
  **(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
--)))
  [[image:1654852175653-550.png]](% style="display:none" %) ** **
@@ -129,6 +129,7 @@
  * Sewer
  * Bottom water level monitoring
++
  == 1.6  Pin mapping and power on ==
@@ -175,17 +175,11 @@
  [[image:image-20220607170145-1.jpeg]]
--(((
  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
--)))
--(((
  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
--)))
--(((
  **Add APP EUI in the application**
--)))
  [[image:image-20220610161353-4.png]]
@@ -228,15 +228,11 @@
  == 2.3  Uplink Payload ==
  (((
--(((
  LDDS75 will uplink payload via LoRaWAN with below payload format:
--)))
--(((
  Uplink payload includes in total 4 bytes.
  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
  )))
--)))
  (((
@@ -247,12 +247,12 @@
  **Size (bytes)**
  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
--[[Distance>>||anchor="H2.3.2A0Distance"]]
++[[Distance>>||anchor="H2.3.3A0Distance"]]
  (unit: mm)
--)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
--[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
--)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
++)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
++[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
++)))|[[Sensor Flag>>path:#Sensor_Flag]]
  [[image:1654850511545-399.png]]
@@ -271,21 +271,18 @@
  === 2.3.2  Distance ===
--(((
  Get the distance. Flat object range 280mm - 7500mm.
--)))
--(((
  For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
--)))
  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
  * If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.
++
  === 2.3.3  Interrupt Pin ===
--This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up.
++This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.
  **Example:**
@@ -311,18 +311,14 @@
  === 2.3.5  Sensor Flag ===
--(((
 x01: Detect Ultrasonic Sensor
--)))
--(((
 x00: No Ultrasonic Sensor
--)))
++===
++(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
--=== 2.3.6  Decode payload in The Things Network ===
--
  While using TTN network, you can add the payload format to decode the payload.
@@ -330,9 +330,7 @@
  The payload decoder function for TTN V3 is here:
--(((
  LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
--)))
@@ -862,17 +862,10 @@
  == 2.8  Firmware Change Log ==
--(((
  **Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
--)))
--(((
--
--)))
--(((
  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
--)))
@@ -881,13 +881,11 @@
  [[image:image-20220610172003-1.png]]
--
  [[image:image-20220610172003-2.png]]
++== 2.10  Battery Analysis  ==
--== 2.10  Battery Analysis ==
--
  === 2.10.1  Battery Type ===
  The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
@@ -896,7 +896,7 @@
  The battery related documents as below:
  * (((
--[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
++[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
  )))
  * (((
  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
@@ -912,7 +912,7 @@
  === 2.10.2  Replace the battery ===
  (((
--You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v.  On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
++You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v.  On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
  )))
  (((
@@ -920,12 +920,12 @@
  )))
  (((
--The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
++The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
  )))
--= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
++= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
  (((
  (((
@@ -935,7 +935,7 @@
  * (((
  (((
--AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
++AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
  )))
  )))
  * (((
@@ -1016,9 +1016,7 @@
  [[image:image-20220610172924-5.png]]
--(((
  In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
--)))
   [[image:image-20220610172924-6.png||height="601" width="860"]]
@@ -1034,115 +1034,304 @@
  [[image:image-20220610173409-7.png]]
++
++
  (((
--(% style="color:#037691" %)**Downlink Command: 0x01**
++(% style="color:#037691" %)**Downlink Command: 0x06**
  )))
  (((
++Format: Command Code (0x06) followed by 3 bytes.
++)))
++
  (((
--Format: Command Code (0x01) followed by 3 bytes time value.
++This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
++)))
++* (((
++Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
++)))
++* (((
++Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
++)))
++
++== 3.3  Get Firmware Version Info ==
++
++Feature: use downlink to get firmware version.
++
++(% style="color:#037691" %)**Downlink Command: 0x26**
++
++[[image:image-20220607171917-10.png]]
++
++* Reply to the confirmation package: 26 01
++* Reply to non-confirmed packet: 26 00
++
++Device will send an uplink after got this downlink command. With below payload:
++
++Configures info payload:
++
++(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
++|=(((
++**Size(bytes)**
++)))|=**1**|=**1**|=**1**|=**1**|=**1**|=**5**|=**1**
++|**Value**|Software Type|(((
++Frequency
++
++Band
++)))|Sub-band|(((
++Firmware
++
++Version
++)))|Sensor Type|Reserve|(((
++[[Message Type>>||anchor="H2.3.7A0MessageType"]]
++Always 0x02
++)))
++
++**Software Type**: Always 0x03 for LLDS12
++
++
++**Frequency Band**:
++
++*0x01: EU868
++
++*0x02: US915
++
++*0x03: IN865
++
++*0x04: AU915
++
++*0x05: KZ865
++
++*0x06: RU864
++
++*0x07: AS923
++
++*0x08: AS923-1
++
++*0x09: AS923-2
++
++*0xa0: AS923-3
++
++
++**Sub-Band**: value 0x00 ~~ 0x08
++
++
++**Firmware Version**: 0x0100, Means: v1.0.0 version
++
++
++**Sensor Type**:
++
++0x01: LSE01
++
++0x02: LDDS75
++
++0x03: LDDS20
++
++0x04: LLMS01
++
++0x05: LSPH01
++
++0x06: LSNPK01
++
++0x07: LLDS12
++
++
++
++= 5.  Battery & How to replace =
++
++== 5.1  Battery Type ==
++
  (((
--If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
++LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
  )))
--* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
--* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
++(((
++The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
  )))
++[[image:1654593587246-335.png]]
--
++
++Minimum Working Voltage for the LLDS12:
++
++LLDS12:  2.45v ~~ 3.6v
++
++
++
++== 5.2  Replace Battery ==
++
++(((
++Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
  )))
--== 3.3  Set Interrupt Mode ==
++(((
++And make sure the positive and negative pins match.
++)))
--Feature, Set Interrupt mode for GPIO_EXIT.
--(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
--[[image:image-20220610174917-9.png]]
++== 5.3  Power Consumption Analyze ==
++(((
++Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
++)))
--(% style="color:#037691" %)**Downlink Command: 0x06**
++(((
++Instruction to use as below:
++)))
--Format: Command Code (0x06) followed by 3 bytes.
++**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
++
++[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
++
++
++**Step 2**: Open it and choose
++
++* Product Model
++* Uplink Interval
++* Working Mode
++
++And the Life expectation in difference case will be shown on the right.
++
++[[image:1654593605679-189.png]]
++
++
++The battery related documents as below:
++
++* (((
++[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
++)))
++* (((
++[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
++)))
++* (((
++[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
++)))
++
++[[image:image-20220607172042-11.png]]
++
++
++
++=== 5.3.1  Battery Note ===
++
  (((
--This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
++The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
  )))
--* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
--* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
++=== 5.3.2  Replace the battery ===
--= 4.  FAQ =
++(((
++You can change the battery in the LLDS12.The type of battery is not limited as long as the output is between 3v to 3.6v.  On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
++)))
--== 4.1  What is the frequency plan for LDDS75? ==
++(((
++The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
++)))
--LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
++= 6.  Use AT Command =
--== 4.2  How to change the LoRa Frequency Bands/Region ==
++== 6.1  Access AT Commands ==
--You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
--When downloading the images, choose the required image file for download.
++LLDS12 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LLDS12 for using AT command, as below.
++[[image:1654593668970-604.png]]
++**Connection:**
--== 4.3  Can I use LDDS75 in condensation environment? ==
++(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
--LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
++(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
++(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
--= 5.  Trouble Shooting =
++(((
++(((
++In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
++)))
--== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
++(((
++LLDS12 will output system info once power on as below:
++)))
++)))
--It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
++ [[image:1654593712276-618.png]]
--== 5.2  AT Command input doesn't work ==
++Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
++
++= 7.  FAQ =
++
++== 7.1  How to change the LoRa Frequency Bands/Region ==
++
++You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
++When downloading the images, choose the required image file for download.
++
++
++= 8.  Trouble Shooting =
++
++== 8.1  AT Commands input doesn’t work ==
++
++
++(((
  In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
++)))
++
++== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
++
++
  (((
--
++(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.)
  )))
++(((
++Troubleshooting: Please avoid use of this product under such circumstance in practice.
++)))
--= 6.  Order Info =
++(((
++
++)))
++(((
++(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
++)))
--Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
++(((
++Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
++)))
--(% style="color:blue" %)**XX**(%%)**: **The default frequency band
--* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
--* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
--* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
--* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
--* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
--* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
--* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
--* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
++= 9.  Order Info =
--(% style="color:blue" %)**YY**(%%): Battery Option
--* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
--* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
++Part Number: (% style="color:blue" %)**LLDS12-XX**
++(% style="color:blue" %)**XX**(%%): The default frequency band
--= 7.  Packing Info =
++* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
++* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
++* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
++* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
++* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
++* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
++* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
++* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
++= 10.  Packing Info =
++
  **Package Includes**:
--* LDDS75 LoRaWAN Distance Detection Sensor x 1
++* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
  **Dimension and weight**:
@@ -1151,9 +1151,7 @@
  * Package Size / pcs : cm
  * Weight / pcs : g
++= 11.  Support =
--
--= 8.  Support =
--
  * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
  * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].

image-20220610174836-8.png

Author

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Changes for page LMDS200 -- LoRaWAN Microwave Radar Distance Sensor User Manual

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