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

Last modified by Mengting Qiu on 2024/03/07 08:41

From version < 147.4 >

edited by Xiaoling
on 2022/06/10 17:40

To version < 143.2 >

edited by Xiaoling
on 2022/06/10 17:24

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@@ -58,6 +58,7 @@
  * 4000mAh or 8500mAh Battery for long term use
++
  == 1.3  Specification ==
  === 1.3.1  Rated environmental conditions ===
@@ -99,6 +99,7 @@
  * Bottom water level monitoring
++
  == 1.6  Pin mapping and power on ==
@@ -240,6 +240,7 @@
  * 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="H4.2A0SetInterruptMode"]] for the hardware and software set up.
@@ -810,6 +810,7 @@
  * Blink once when device transmit a packet.
++
  == 2.8  Firmware Change Log ==
@@ -828,7 +828,7 @@
  [[image:image-20220610172003-2.png]]
--== 2.10  Battery Analysis  ==
++== 2.10  Battery Analysis   ==
  === 2.10.1  Battery Type ===
@@ -850,30 +850,73 @@
   [[image:image-20220610172400-3.png]]
++= 3.  LiDAR ToF Measurement =
--=== 2.10.2  Replace the battery ===
++== 3.1  Principle of Distance Measurement ==
++The LiDAR probe is based on TOF, namely, Time of Flight principle. To be specific, the product emits modulation wave of near infrared ray on a periodic basis, which will be reflected after contacting object. The product obtains the time of flight by measuring round-trip phase difference and then calculates relative range between the product and the detection object, as shown below.
++
++[[image:1654831757579-263.png]]
++
++
++
++== 3.2  Distance Measurement Characteristics ==
++
++With optimization of light path and algorithm, The LiDAR probe has minimized influence from external environment on distance measurement performance. Despite that, the range of distance measurement may still be affected by the environment illumination intensity and the reflectivity of detection object. As shown in below:
++
++[[image:1654831774373-275.png]]
++
++
  (((
--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.
++(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
  )))
  (((
--
++(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
  )))
  (((
--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)
++(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
  )))
++(((
++Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at the different distances. The diameter of light spot depends on the FOV of The LiDAR probe (the term of FOV generally refers to the smaller value between the receiving angle and the transmitting angle), which is calculated as follows:
++)))
--= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
++[[image:1654831797521-720.png]]
++
++
  (((
++In the formula above, d is the diameter of light spot; D is detecting range; β is the value of the receiving angle of The LiDAR probe, 3.6°. Correspondence between the diameter of light spot and detecting range is given in Table below.
++)))
++
++[[image:1654831810009-716.png]]
++
++
  (((
--Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
++If the light spot reaches two objects with different distances, as shown in Figure 3, the output distance value will be a value between the actual distance values of the two objects. For a high accuracy requirement in practice, the above situation should be noticed to avoid the measurement error.
  )))
++
++
++
++== 3.3  Notice of usage: ==
++
++Possible invalid /wrong reading for LiDAR ToF tech:
++
++* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
++* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
++* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
++* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
++
++= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
++
++(((
++(((
++Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
  )))
++)))
  * (((
  (((
@@ -892,7 +892,7 @@
  )))
  (((
--There are two kinds of commands to configure LDDS75, they are:
++There are two kinds of commands to configure LLDS12, they are:
  )))
  )))
@@ -933,88 +933,156 @@
  * (((
  (((
--(% style="color:#4f81bd" %)** Commands special design for LDDS75**
++(% style="color:#4f81bd" %)** Commands special design for LLDS12**
  )))
  )))
  (((
  (((
--These commands only valid for LDDS75, as below:
++These commands only valid for LLDS12, as below:
  )))
  )))
--== 3.1  Access AT Commands ==
++== 4.1  Set Transmit Interval Time ==
--LDDS75 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LDDS75 for using AT command, as below.
++Feature: Change LoRaWAN End Node Transmit Interval.
--[[image:image-20220610172924-4.png||height="483" width="988"]]
++(% style="color:#037691" %)**AT Command: AT+TDC**
++[[image:image-20220607171554-8.png]]
--Or if you have below board, use below connection:
++(((
++(% style="color:#037691" %)**Downlink Command: 0x01**
++)))
--[[image:image-20220610172924-5.png]]
++(((
++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.
++)))
--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:
++* (((
++Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
++)))
++* (((
++Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
++)))
++== 4.2  Set Interrupt Mode ==
-- [[image:image-20220610172924-6.png||height="601" width="860"]]
++Feature, Set Interrupt mode for GPIO_EXIT.
++(% style="color:#037691" %)**AT Command: AT+INTMOD**
++[[image:image-20220610105806-2.png]]
--== 3.2  Set Transmit Interval Time ==
--Feature: Change LoRaWAN End Node Transmit Interval.
++(((
++(% style="color:#037691" %)**Downlink Command: 0x06**
++)))
--(% style="color:#037691" %)**AT Command: AT+TDC**
++(((
++Format: Command Code (0x06) followed by 3 bytes.
++)))
--[[image:image-20220610173409-7.png]]
++(((
++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
++)))
++== 4.3  Get Firmware Version Info ==
++Feature: use downlink to get firmware version.
--(((
--(% style="color:#037691" %)**Downlink Command: 0x01**
--)))
++(% style="color:#037691" %)**Downlink Command: 0x26**
--(((
--(((
--Format: Command Code (0x01) followed by 3 bytes time value.
++[[image:image-20220607171917-10.png]]
--If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
++* Reply to the confirmation package: 26 01
++* Reply to non-confirmed packet: 26 00
--* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
--* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
--)))
++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
  )))
--== 3.3  Set Interrupt Mode ==
++**Software Type**: Always 0x03 for LLDS12
--Feature, Set Interrupt mode for GPIO_EXIT.
++**Frequency Band**:
--(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
++*0x01: EU868
--[[image:image-20220610105907-1.png]]
++*0x02: US915
++*0x03: IN865
--**Downlink Command: 0x06**
++*0x04: AU915
--Format: Command Code (0x06) followed by 3 bytes.
++*0x05: KZ865
--This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
++*0x06: RU864
--* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
--* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
++*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 ==

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