Last modified by Mengting Qiu on 2023/12/14 11:15

From version 79.20
edited by Xiaoling
on 2023/06/14 15:26
Change comment: Update document after refactoring.
To version 80.4
edited by Xiaoling
on 2023/06/14 16:21
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Title
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1 -LDS12-LB_LoRaWAN_LiDAR_ToF_Distance_Sensor_User_Manual
1 +LDS12-LB -- LoRaWAN LiDAR ToF Distance Sensor User Manual
Content
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1 1  (% style="text-align:center" %)
2 -[[image:image-20230613133716-2.png||height="717" width="717"]]
2 +[[image:image-20230614153353-1.png]]
3 3  
4 4  
5 5  
... ... @@ -7,7 +7,6 @@
7 7  
8 8  
9 9  
10 -
11 11  **Table of Contents:**
12 12  
13 13  {{toc/}}
... ... @@ -19,22 +19,22 @@
19 19  
20 20  = 1. Introduction =
21 21  
22 -== 1.1 What is LoRaWAN Ultrasonic liquid level Sensor ==
21 +== 1.1 What is LoRaWAN LiDAR ToF Distance Sensor ==
23 23  
24 24  
25 -The Dragino DDS20-LB is a (% style="color:blue" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:blue" %)**none-contact method **(%%)to measure the (% style="color:blue" %)**height of liquid**(%%) in a container without opening the container, and send the value via LoRaWAN network to IoT Server.
24 +The Dragino LDS12-LB is a (% style="color:blue" %)**LoRaWAN LiDAR ToF (Time of Flight) Distance Sensor**(%%) for Internet of Things solution. It is capable to measure the distance to an object as close as 10 centimeters (+/- 5cm up to 6m) and as far as 12 meters (+/-1% starting at 6m)!. The LiDAR probe uses laser induction technology for distance measurement.
26 26  
27 -The DDS20-LB sensor is installed directly below the container to detect the height of the liquid level. User doesn't need to open a hole on the container to be tested. The none-contact measurement makes the measurement safety, easier and possible for some strict situation. 
26 +The LDS12-LB can be applied to scenarios such as horizontal distance measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, etc.
28 28  
29 -DDS20-LB uses (% style="color:blue" %)**ultrasonic sensing technology**(%%) for distance measurement. DDS20-LB is of high accuracy to measure various liquid such as: (% style="color:blue" %)**toxic substances**(%%), (% style="color:blue" %)**strong acids**(%%), (% style="color:blue" %)**strong alkalis**(%%) and (% style="color:blue" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
28 +It detects the distance between the measured object and the sensor, and uploads the value via wireless to LoRaWAN IoT Server.
30 30  
31 -The LoRa wireless technology used in DDS20-LB 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.
30 +The LoRa wireless technology used in LDS12-LB 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.
32 32  
33 -DDS20-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.
32 +LDS12-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.
34 34  
35 -DDS20-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.
34 +LDS12-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.
36 36  
37 -Each DDS20-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.
36 +Each LDS12-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.
38 38  
39 39  [[image:image-20230613140115-3.png||height="453" width="800"]]
40 40  
... ... @@ -58,7 +58,6 @@
58 58  * 8500mAh Battery for long term use
59 59  
60 60  
61 -
62 62  == 1.3 Specification ==
63 63  
64 64  
... ... @@ -88,7 +88,6 @@
88 88  * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
89 89  
90 90  
91 -
92 92  == 1.4 Suitable Container & Liquid ==
93 93  
94 94  
... ... @@ -100,15 +100,14 @@
100 100  * Pure liquid without irregular deposition.
101 101  
102 102  
103 -
104 104  (% style="display:none" %)
105 105  
106 -== 1.5 Install DDS20-LB ==
102 +== 1.5 Install LDS12-LB ==
107 107  
108 108  
109 109  (% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
110 110  
111 -DDS20-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
107 +LDS12-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
112 112  
113 113  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-3.png?rev=1.1||alt="image-20220615091045-3.png"]]
114 114  
... ... @@ -134,15 +134,15 @@
134 134  )))
135 135  
136 136  (((
137 -Power on DDS20-LB, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
133 +Power on LDS12-LB, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
138 138  )))
139 139  
140 140  (((
141 -It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-LB won't detect the liquid level.
137 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDS12-LB won't detect the liquid level.
142 142  )))
143 143  
144 144  (((
145 -After paste the DDS20-LB well, power on DDS20-LB. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
141 +After paste the LDS12-LB well, power on LDS12-LB. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
146 146  )))
147 147  
148 148  
... ... @@ -162,7 +162,7 @@
162 162  )))
163 163  
164 164  (((
165 -LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
161 +LDS12-LB will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
166 166  )))
167 167  
168 168  
... ... @@ -184,7 +184,7 @@
184 184  )))
185 185  
186 186  (((
187 -Reset DDS20-LB and see if the BLUE LED is slowly blinking.
183 +Reset LDS12-LB and see if the BLUE LED is slowly blinking.
188 188  )))
189 189  
190 190  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-8.png?width=341&height=203&rev=1.1||alt="image-20220615091045-8.png"]] [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-9.png?width=284&height=200&rev=1.1||alt="image-20220615091045-9.png"]]
... ... @@ -209,7 +209,6 @@
209 209  * Smart liquefied gas solution
210 210  
211 211  
212 -
213 213  == 1.7 Precautions ==
214 214  
215 215  
... ... @@ -219,7 +219,6 @@
219 219  
220 220  * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
221 221  
222 -
223 223  (% style="display:none" %)
224 224  
225 225  == 1.8 Sleep mode and working mode ==
... ... @@ -250,11 +250,10 @@
250 250  |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode.
251 251  
252 252  
253 -
254 254  == 1.10 BLE connection ==
255 255  
256 256  
257 -DDS20-LB support BLE remote configure.
250 +LDS12-LB support BLE remote configure.
258 258  
259 259  BLE can be used to configure the parameter of sensor or see the console output from sensor. BLE will be only activate on below case:
260 260  
... ... @@ -290,12 +290,12 @@
290 290  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615090910-2.png?rev=1.1||alt="image-20220615090910-2.png"]]
291 291  
292 292  
293 -= 2. Configure DDS20-LB to connect to LoRaWAN network =
286 += 2. Configure LDS12-LB to connect to LoRaWAN network =
294 294  
295 295  == 2.1 How it works ==
296 296  
297 297  
298 -The DDS20-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and press the button to activate the DDS20-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.
291 +The LDS12-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and press the button to activate the LDS12-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.
299 299  
300 300  (% style="display:none" %) (%%)
301 301  
... ... @@ -309,9 +309,9 @@
309 309  [[image:image-20230613140140-4.png||height="453" width="800"]](% style="display:none" %)
310 310  
311 311  
312 -(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS20-LB.
305 +(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from LDS12-LB.
313 313  
314 -Each DDS20-LB is shipped with a sticker with the default device EUI as below:
307 +Each LDS12-LB is shipped with a sticker with the default device EUI as below:
315 315  
316 316  [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
317 317  
... ... @@ -340,10 +340,10 @@
340 340  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-6.png?width=744&height=485&rev=1.1||alt="图片-20220611161308-6.png"]]
341 341  
342 342  
343 -(% style="color:blue" %)**Step 2:**(%%) Activate on DDS20-LB
336 +(% style="color:blue" %)**Step 2:**(%%) Activate on LDS12-LB
344 344  
345 345  
346 -Press the button for 5 seconds to activate the DDS20-LB.
339 +Press the button for 5 seconds to activate the LDS12-LB.
347 347  
348 348  (% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:blue" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network. (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
349 349  
... ... @@ -354,7 +354,7 @@
354 354  
355 355  
356 356  (((
357 -DDS20-LB will uplink payload via LoRaWAN with below payload format: 
350 +LDS12-LB will uplink payload via LoRaWAN with below payload format: 
358 358  )))
359 359  
360 360  (((
... ... @@ -378,7 +378,7 @@
378 378  === 2.3.1  Battery Info ===
379 379  
380 380  
381 -Check the battery voltage for DDS20-LB.
374 +Check the battery voltage for LDS12-LB.
382 382  
383 383  Ex1: 0x0B45 = 2885mV
384 384  
... ... @@ -403,7 +403,6 @@
403 403  * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
404 404  
405 405  
406 -
407 407  === 2.3.3  Interrupt Pin ===
408 408  
409 409  
... ... @@ -450,7 +450,7 @@
450 450  The payload decoder function for TTN V3 is here:
451 451  
452 452  (((
453 -DDS20-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
445 +LDS12-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
454 454  )))
455 455  
456 456  
... ... @@ -457,7 +457,7 @@
457 457  == 2.4  Uplink Interval ==
458 458  
459 459  
460 -The DDS20-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>||anchor="H3.3.1SetTransmitIntervalTime"]]
452 +The LDS12-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>||anchor="H3.3.1SetTransmitIntervalTime"]]
461 461  
462 462  
463 463  == 2.5  ​Show Data in DataCake IoT Server ==
... ... @@ -485,7 +485,7 @@
485 485  
486 486  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
487 487  
488 -(% style="color:blue" %)**Step 4**(%%)**: Search the DDS20-LB and add DevEUI.**
480 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDS12-LB and add DevEUI.**
489 489  
490 490  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654851029373-510.png?rev=1.1||alt="1654851029373-510.png"]]
491 491  
... ... @@ -498,19 +498,19 @@
498 498  == 2.6 Datalog Feature ==
499 499  
500 500  
501 -Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DDS20-LB will store the reading for future retrieving purposes.
493 +Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LDS12-LB will store the reading for future retrieving purposes.
502 502  
503 503  
504 504  === 2.6.1 Ways to get datalog via LoRaWAN ===
505 505  
506 506  
507 -Set PNACKMD=1, DDS20-LB will wait for ACK for every uplink, when there is no LoRaWAN network,DDS20-LB will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
499 +Set PNACKMD=1, LDS12-LB will wait for ACK for every uplink, when there is no LoRaWAN network,LDS12-LB will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
508 508  
509 509  * (((
510 -a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
502 +a) LDS12-LB will do an ACK check for data records sending to make sure every data arrive server.
511 511  )))
512 512  * (((
513 -b) DDS20-LB will send data in **CONFIRMED Mode** when PNACKMD=1, but DDS20-LB won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if DDS20-LB gets a ACK, DDS20-LB will consider there is a network connection and resend all NONE-ACK messages.
505 +b) LDS12-LB will send data in **CONFIRMED Mode** when PNACKMD=1, but LDS12-LB won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if LDS12-LB gets a ACK, LDS12-LB will consider there is a network connection and resend all NONE-ACK messages.
514 514  )))
515 515  
516 516  Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
... ... @@ -521,7 +521,7 @@
521 521  === 2.6.2 Unix TimeStamp ===
522 522  
523 523  
524 -DDS20-LB uses Unix TimeStamp format based on
516 +LDS12-LB uses Unix TimeStamp format based on
525 525  
526 526  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-11.png?width=627&height=97&rev=1.1||alt="图片-20220523001219-11.png" height="97" width="627"]]
527 527  
... ... @@ -540,7 +540,7 @@
540 540  
541 541  User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
542 542  
543 -Once DDS20-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DDS20-LB. If DDS20-LB fails to get the time from the server, DDS20-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
535 +Once LDS12-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to LDS12-LB. If LDS12-LB fails to get the time from the server, LDS12-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
544 544  
545 545  (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.**
546 546  
... ... @@ -568,7 +568,7 @@
568 568  )))
569 569  
570 570  (((
571 -Uplink Internal =5s,means DDS20-LB will send one packet every 5s. range 5~~255s.
563 +Uplink Internal =5s,means LDS12-LB will send one packet every 5s. range 5~~255s.
572 572  )))
573 573  
574 574  
... ... @@ -575,17 +575,17 @@
575 575  == 2.7 Frequency Plans ==
576 576  
577 577  
578 -The DDS20-LB uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.
570 +The LDS12-LB uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.
579 579  
580 580  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
581 581  
582 582  
583 -= 3. Configure DDS20-LB =
575 += 3. Configure LDS12-LB =
584 584  
585 585  == 3.1 Configure Methods ==
586 586  
587 587  
588 -DDS20-LB supports below configure method:
580 +LDS12-LB supports below configure method:
589 589  
590 590  * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
591 591  
... ... @@ -594,7 +594,6 @@
594 594  * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
595 595  
596 596  
597 -
598 598  == 3.2 General Commands ==
599 599  
600 600  
... ... @@ -609,10 +609,10 @@
609 609  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
610 610  
611 611  
612 -== 3.3 Commands special design for DDS20-LB ==
603 +== 3.3 Commands special design for LDS12-LB ==
613 613  
614 614  
615 -These commands only valid for DDS20-LB, as below:
606 +These commands only valid for LDS12-LB, as below:
616 616  
617 617  
618 618  === 3.3.1 Set Transmit Interval Time ===
... ... @@ -695,11 +695,10 @@
695 695  * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
696 696  
697 697  
698 -
699 699  = 4. Battery & Power Consumption =
700 700  
701 701  
702 -DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
692 +LDS12-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
703 703  
704 704  [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
705 705  
... ... @@ -708,7 +708,7 @@
708 708  
709 709  
710 710  (% class="wikigeneratedid" %)
711 -User can change firmware DDS20-LB to:
701 +User can change firmware LDS12-LB to:
712 712  
713 713  * Change Frequency band/ region.
714 714  
... ... @@ -725,42 +725,40 @@
725 725  * 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]]**.
726 726  
727 727  
728 -
729 729  = 6. FAQ =
730 730  
731 -== 6.1  What is the frequency plan for DDS20-LB? ==
720 +== 6.1 What is the frequency plan for LDS12-LB? ==
732 732  
733 733  
734 -DDS20-LB 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"]]
723 +LDS12-LB 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"]]
735 735  
736 736  
737 -== 6.2  Can I use DDS20-LB in condensation environment? ==
726 += 7Trouble Shooting =
738 738  
728 +== 7.1 AT Command input doesn't work ==
739 739  
740 -DDS20-LB is not suitable to be used in condensation environment. Condensation on the DDS20-LB probe will affect the reading and always got 0.
741 741  
731 +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:blue" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:blue" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
742 742  
743 -= 7.  Trouble Shooting =
744 744  
745 -== 7.1  Why I can't join TTN V3 in US915 / AU915 bands? ==
734 +== 7.2 Significant error between the output distant value of LiDAR and actual distance ==
746 746  
747 747  
748 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
737 +(((
738 +(% 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.)
739 +)))
749 749  
741 +(((
742 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
743 +)))
750 750  
751 -== 7.2  AT Command input doesn't work ==
752 752  
753 -
754 -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:blue" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:blue" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
755 -
756 -
757 -== 7.3  Why i always see 0x0000 or 0 for the distance value? ==
758 -
759 -
760 760  (((
761 -LDDS20 has a strict [[**installation requirement**>>||anchor="H1.5A0InstallDDS20-LB"]]. Please make sure the installation method exactly follows up with the installation requirement. Otherwise, the reading might be always 0x00.
747 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
748 +)))
762 762  
763 -If you have followed the instruction requirement exactly but still see the 0x00 reading issue, please. please double-check the decoder, you can check the raw payload to verify.
750 +(((
751 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
764 764  )))
765 765  
766 766  
... ... @@ -767,7 +767,7 @@
767 767  = 8. Order Info =
768 768  
769 769  
770 -Part Number: (% style="color:blue" %)**DDS20-LB-XXX**
758 +Part Number: (% style="color:blue" %)**LDS12-LB-XXX**
771 771  
772 772  (% style="color:red" %)**XXX**(%%): **The default frequency band**
773 773  
... ... @@ -788,13 +788,12 @@
788 788  * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
789 789  
790 790  
791 -
792 792  = 9. ​Packing Info =
793 793  
794 794  
795 795  (% style="color:#037691" %)**Package Includes**:
796 796  
797 -* DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
784 +* LDS12-LB LoRaWAN LiDAR ToF Distance Sensor x 1
798 798  
799 799  (% style="color:#037691" %)**Dimension and weight**:
800 800  
... ... @@ -807,7 +807,6 @@
807 807  * Weight / pcs : g
808 808  
809 809  
810 -
811 811  = 10. Support =
812 812  
813 813  
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