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Last modified by Mengting Qiu on 2023/12/14 11:15
From version 109.14
edited by Xiaoling
on 2023/11/10 08:51
Change comment: Update document after refactoring.
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edited by Xiaoling
on 2023/11/10 10:03
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Title
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1 -DS20L_LoRaWAN_Smart_Distance_Detector_User_Manual
1 +DS20L -- LoRaWAN Smart Distance Detector User Manual
Content
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1 1  (% style="text-align:center" %)
2 -[[image:image-20230614153353-1.png]]
2 +[[image:image-20231110085342-2.png||height="481" width="481"]]
3 3  
4 4  
5 5  
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7 7  
8 8  
9 9  
10 +
10 10  **Table of Contents：**
11 11  
12 12  {{toc/}}
... ... @@ -18,174 +18,59 @@
18 18  
19 19  = 1. Introduction =
20 20  
21 -== 1.1 What is LoRaWAN LiDAR ToF Distance Sensor ==
22 +== 1.1 What is LoRaWAN Smart Distance Detector ==
22 22  
23 23  
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.
25 +The Dragino (% style="color:blue" %)**DS20L is a smart distance detector**(%%) base on long-range wireless LoRaWAN technology. It uses (% style="color:blue" %)**LiDAR sensor**(%%) to detect the distance between DS20L and object, then DS20L will send the distance data to the IoT Platform via LoRaWAN.
25 25  
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.
27 +DS20L allows users to send data and reach extremely long ranges via LoRaWAN. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current 
28 +consumption. It targets professional wireless sensor network applications such smart cities, building automation, and so on.
27 27  
28 -It detects the distance between the measured object and the sensor, and uploads the value via wireless to LoRaWAN IoT Server.
30 +DS20L has a (% style="color:blue" %)**built-in 2400mAh non-chargeable battery**(%%) for long-term use up to several years*. Users can also power DS20L with an external power source for (% style="color:blue" %)**continuous measuring and distance alarm / counting purposes.**
29 29  
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 +DS20L is fully compatible with (% style="color:blue" %)**LoRaWAN v1.0.3 Class A protocol**(%%), it can work with a standard LoRaWAN gateway.
31 31  
32 -LDS12-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.
34 +DS20L supports (% style="color:blue" %)**Datalog feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
33 33  
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 +[[image:image-20231110091506-4.png||height="391" width="768"]]
35 35  
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.
37 37  
38 -[[image:image-20230615152941-1.png||height="459" width="800"]]
39 -
40 -
41 41  == 1.2 ​Features ==
42 42  
43 43  
44 -* LoRaWAN 1.0.3 Class A
45 -* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
46 -* Ultra-low power consumption
47 -* Laser technology for distance detection
48 -* Measure Distance: 0.1m~~12m
49 -* Accuracy :  ±5cm@(0.1-5m), ±1%@(5m-12m)
50 -* Monitor Battery Level
51 -* Support Bluetooth v5.1 and LoRaWAN remote configure
52 -* Support wireless OTA update firmware
42 +* LoRaWAN Class A protocol
43 +* LiDAR distance detector, range 3 ~~ 200cm
44 +* Periodically detect or continuously detect mode
53 53  * AT Commands to change parameters
54 -* Downlink to change configure
55 -* 8500mAh Battery for long term use
46 +* Remotely configure parameters via LoRaWAN Downlink
47 +* Alarm & Counting mode
48 +* Datalog Feature
49 +* Firmware upgradable via program port or LoRa protocol
50 +* Built-in 2400mAh battery or power by external power source
56 56  
57 -
58 58  == 1.3 Specification ==
59 59  
60 60  
61 -(% style="color:#037691" %)**Common DC Characteristics:**
55 +(% style="color:#037691" %)**LiDAR Sensor:**
62 62  
63 -* Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~~ 3.6v
64 -* Operating Temperature: -40 ~~ 85°C
57 +* Operation Temperature: -40 ~~ 80 °C
58 +* Operation Humidity: 0~~99.9%RH (no Dew)
59 +* Storage Temperature: -10 ~~ 45°C
60 +* Measure Range: 3cm~~200cm @ 90% reflectivity
61 +* Accuracy: ±2cm @ (3cm~~100cm); ±5% @ (100~~200cm)
62 +* ToF FoV: ±9°, Total 18°
63 +* Light source: VCSEL
65 65  
66 -(% style="color:#037691" %)**Probe Specification:**
67 67  
68 -* Storage temperature：-20℃~~75℃
69 -* Operating temperature : -20℃~~60℃
70 -* Measure Distance:
71 -** 0.1m ~~ 12m @ 90% Reflectivity
72 -** 0.1m ~~ 4m @ 10% Reflectivity
73 -* Accuracy : ±5cm@(0.1-5m), ±1%@(5m-12m)
74 -* Distance resolution : 1cm
75 -* Ambient light immunity : 70klux
76 -* Enclosure rating : IP65
77 -* Light source : LED
78 -* Central wavelength : 850nm
79 -* FOV : 3.6°
80 -* Material of enclosure : ABS+PC
81 -* Wire length : 25cm
82 -
83 -(% style="color:#037691" %)**LoRa Spec:**
84 -
85 -* Frequency Range,  Band 1 (HF): 862 ~~ 1020 Mhz
86 -* Max +22 dBm constant RF output vs.
87 -* RX sensitivity: down to -139 dBm.
88 -* Excellent blocking immunity
89 -
90 -(% style="color:#037691" %)**Battery:**
91 -
92 -* Li/SOCI2 un-chargeable battery
93 -* Capacity: 8500mAh
94 -* Self-Discharge: <1% / Year @ 25°C
95 -* Max continuously current: 130mA
96 -* Max boost current: 2A, 1 second
97 -
98 -(% style="color:#037691" %)**Power Consumption**
99 -
100 -* Sleep Mode: 5uA @ 3.3v
101 -* LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
102 -
103 -
104 -== 1.4 Applications ==
105 -
106 -
107 -* Horizontal distance measurement
108 -* Parking management system
109 -* Object proximity and presence detection
110 -* Intelligent trash can management system
111 -* Robot obstacle avoidance
112 -* Automatic control
113 -* Sewer
114 -
115 -
116 116  (% style="display:none" %)
117 117  
118 -== 1.5 Sleep mode and working mode ==
119 119  
69 += 2. Configure DS20L to connect to LoRaWAN network =
120 120  
121 -(% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.
122 -
123 -(% style="color:blue" %)**Working Mode:** (%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.
124 -
125 -
126 -== 1.6 Button & LEDs ==
127 -
128 -
129 -[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
130 -
131 -
132 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
133 -|=(% style="width: 167px;background-color:#4F81BD;color:white" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 225px;background-color:#4F81BD;color:white" %)**Action**
134 -|(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
135 -If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
136 -Meanwhile, BLE module will be active and user can connect via BLE to configure device.
137 -)))
138 -|(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
139 -(% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network.
140 -(% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
141 -Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device join or not join LoRaWAN network.
142 -)))
143 -|(% 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.
144 -
145 -
146 -== 1.7 BLE connection ==
147 -
148 -
149 -LDS12-LB support BLE remote configure.
150 -
151 -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:
152 -
153 -* Press button to send an uplink
154 -* Press button to active device.
155 -* Device Power on or reset.
156 -
157 -If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
158 -
159 -
160 -== 1.8 Pin Definitions ==
161 -
162 -
163 -[[image:image-20230805144259-1.png||height="413" width="741"]]
164 -
165 -== 1.9 Mechanical ==
166 -
167 -
168 -[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]]
169 -
170 -
171 -[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143899218-599.png]]
172 -
173 -
174 -[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]]
175 -
176 -
177 -(% style="color:blue" %)**Probe Mechanical:**
178 -
179 -
180 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654827224480-952.png?rev=1.1||alt="1654827224480-952.png"]]
181 -
182 -
183 -= 2. Configure LDS12-LB to connect to LoRaWAN network =
184 -
185 185  == 2.1 How it works ==
186 186  
187 187  
188 -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.
74 +The DS20L 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 DS20L. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.
189 189  
190 190  (% style="display:none" %) (%%)
191 191  
... ... @@ -196,12 +196,12 @@
196 196  
197 197  The LPS8v2 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.
198 198  
199 -[[image:image-20230615153004-2.png||height="459" width="800"]](% style="display:none" %)
85 +[[image:image-20231110091447-3.png||height="383" width="752"]](% style="display:none" %)
200 200  
201 201  
202 -(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from LDS12-LB.
88 +(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DS20L.
203 203  
204 -Each LDS12-LB is shipped with a sticker with the default device EUI as below:
90 +Each DS20L is shipped with a sticker with the default device EUI as below:
205 205  
206 206  [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
207 207  
... ... @@ -230,10 +230,10 @@
230 230  [[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"]]
231 231  
232 232  
233 -(% style="color:blue" %)**Step 2:**(%%) Activate on LDS12-LB
119 +(% style="color:blue" %)**Step 2:**(%%) Activate on DS20L
234 234  
235 235  
236 -Press the button for 5 seconds to activate the LDS12-LB.
122 +Press the button for 5 seconds to activate the DS20L.
237 237  
238 238  (% 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.
239 239  
... ... @@ -245,7 +245,7 @@
245 245  === 2.3.1 Device Status, FPORT~=5 ===
246 246  
247 247  
248 -Users can use the downlink command(**0x26 01**) to ask LDS12-LB to send device configure detail, include device configure status. LDS12-LB will uplink a payload via FPort=5 to server.
134 +Users can use the downlink command(**0x26 01**) to ask DS20L to send device configure detail, include device configure status. DS20L will uplink a payload via FPort=5 to server.
249 249  
250 250  The Payload format is as below.
251 251  
... ... @@ -259,7 +259,7 @@
259 259  
260 260  [[image:image-20230805103904-1.png||height="131" width="711"]]
261 261  
262 -(% style="color:blue" %)**Sensor Model**(%%): For LDS12-LB, this value is 0x24
148 +(% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x24
263 263  
264 264  (% style="color:blue" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version
265 265  
... ... @@ -314,7 +314,7 @@
314 314  
315 315  
316 316  (((
317 -LDS12-LB will send this uplink **after** Device Status once join the LoRaWAN network successfully. And LDS12-LB will:
203 +DS20L will send this uplink **after** Device Status once join the LoRaWAN network successfully. And DS20L will:
318 318  
319 319  periodically send this uplink every 20 minutes, this interval [[can be changed>>||anchor="H3.3.1SetTransmitIntervalTime"]].
320 320  
... ... @@ -339,7 +339,7 @@
339 339  ==== (% style="color:blue" %)**Battery Info**(%%) ====
340 340  
341 341  
342 -Check the battery voltage for LDS12-LB.
228 +Check the battery voltage for DS20L.
343 343  
344 344  Ex1: 0x0B45 = 2885mV
345 345  
... ... @@ -444,7 +444,7 @@
444 444  === 2.3.3 Historical measuring distance, FPORT~=3 ===
445 445  
446 446  
447 -LDS12-LB stores sensor values and users can retrieve these history values via the [[downlink command>>||anchor="H2.5.4Pollsensorvalue"]].
333 +DS20L stores sensor values and users can retrieve these history values via the [[downlink command>>||anchor="H2.5.4Pollsensorvalue"]].
448 448  
449 449  The historical payload includes one or multiplies entries and every entry has the same payload as Real-Time measuring distance.
450 450  
... ... @@ -469,7 +469,7 @@
469 469  )))
470 470  
471 471  * (((
472 -Each data entry is 11 bytes and has the same structure as [[Uplink Payload>>||anchor="H2.3.2UplinkPayload2CFPORT3D2"]], to save airtime and battery, LDS12-LB will send max bytes according to the current DR and Frequency bands.
358 +Each data entry is 11 bytes and has the same structure as [[Uplink Payload>>||anchor="H2.3.2UplinkPayload2CFPORT3D2"]], to save airtime and battery, DS20L will send max bytes according to the current DR and Frequency bands.
473 473  )))
474 474  
475 475  For example, in the US915 band, the max payload for different DR is:
... ... @@ -482,7 +482,7 @@
482 482  
483 483  **d) DR3:** total payload includes 22 entries of data.
484 484  
485 -If LDS12-LB doesn't have any data in the polling time. It will uplink 11 bytes of 0
371 +If DS20L doesn't have any data in the polling time. It will uplink 11 bytes of 0
486 486  
487 487  
488 488  **Downlink:**
... ... @@ -536,7 +536,7 @@
536 536  )))
537 537  
538 538  (((
539 -LDS12-LB TTN Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
425 +DS20L TTN Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
540 540  )))
541 541  
542 542  
... ... @@ -565,7 +565,7 @@
565 565  
566 566  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
567 567  
568 -(% style="color:blue" %)**Step 4**(%%)**: Search the LDS12-LB and add DevEUI.**
454 +(% style="color:blue" %)**Step 4**(%%)**: Search the DS20L and add DevEUI.**
569 569  
570 570  [[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"]]
571 571  
... ... @@ -578,30 +578,27 @@
578 578  == 2.5 Datalog Feature ==
579 579  
580 580  
581 -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.
467 +Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DS20L will store the reading for future retrieving purposes.
582 582  
583 583  
584 584  === 2.5.1 Ways to get datalog via LoRaWAN ===
585 585  
586 586  
587 -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.
473 +Set PNACKMD=1, DS20L will wait for ACK for every uplink, when there is no LoRaWAN network, DS20L 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.
588 588  
589 589  * (((
590 -a) LDS12-LB will do an ACK check for data records sending to make sure every data arrive server.
476 +a) DS20L will do an ACK check for data records sending to make sure every data arrive server.
591 591  )))
592 592  * (((
593 -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.
479 +b) DS20L will send data in **CONFIRMED Mode** when PNACKMD=1, but DS20L 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 DS20L gets a ACK, DS20L will consider there is a network connection and resend all NONE-ACK messages.
594 594  )))
595 595  
596 -Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
597 597  
598 -[[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-20220703111700-2.png?width=1119&height=381&rev=1.1||alt="图片-20220703111700-2.png" height="381" width="1119"]]
599 599  
600 -
601 601  === 2.5.2 Unix TimeStamp ===
602 602  
603 603  
604 -LDS12-LB uses Unix TimeStamp format based on
487 +DS20L uses Unix TimeStamp format based on
605 605  
606 606  [[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"]]
607 607  
... ... @@ -620,7 +620,7 @@
620 620  
621 621  User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
622 622  
623 -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).
506 +Once DS20L Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DS20L. If DS20L fails to get the time from the server, DS20L will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
624 624  
625 625  (% 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.**
626 626  
... ... @@ -660,94 +660,8 @@
660 660  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
661 661  
662 662  
663 -== 2.7 LiDAR ToF Measurement ==
546 +(% style="color:inherit; font-family:inherit; font-size:29px" %)3. Configure LDS12-LB
664 664  
665 -=== 2.7.1 Principle of Distance Measurement ===
666 -
667 -
668 -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.
669 -
670 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654831757579-263.png?rev=1.1||alt="1654831757579-263.png"]]
671 -
672 -
673 -=== 2.7.2 Distance Measurement Characteristics ===
674 -
675 -
676 -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:
677 -
678 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654831774373-275.png?rev=1.1||alt="1654831774373-275.png"]]
679 -
680 -
681 -(((
682 -(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
683 -)))
684 -
685 -(((
686 -(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
687 -)))
688 -
689 -(((
690 -(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
691 -)))
692 -
693 -
694 -(((
695 -Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at 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:
696 -)))
697 -
698 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654831797521-720.png?rev=1.1||alt="1654831797521-720.png"]]
699 -
700 -(((
701 -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.
702 -)))
703 -
704 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654831810009-716.png?rev=1.1||alt="1654831810009-716.png"]]
705 -
706 -(((
707 -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.
708 -)))
709 -
710 -
711 -=== 2.7.3 Notice of usage ===
712 -
713 -
714 -Possible invalid /wrong reading for LiDAR ToF tech:
715 -
716 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
717 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might be wrong.
718 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
719 -* The sensor window is made by Acrylic. Don't touch it with alcohol material. This will destroy the sensor window.
720 -
721 -
722 -=== 2.7.4  Reflectivity of different objects ===
723 -
724 -
725 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:379px" %)
726 -|=(% style="width: 54px;background-color:#4F81BD;color:white" %)Item|=(% style="width: 231px;background-color:#4F81BD;color:white" %)Material|=(% style="width: 94px;background-color:#4F81BD;color:white" %)Relectivity
727 -|(% style="width:53px" %)1|(% style="width:229px" %)Black foam rubber|(% style="width:93px" %)2.4%
728 -|(% style="width:53px" %)2|(% style="width:229px" %)Black fabric|(% style="width:93px" %)3%
729 -|(% style="width:53px" %)3|(% style="width:229px" %)Black rubber|(% style="width:93px" %)4%
730 -|(% style="width:53px" %)4|(% style="width:229px" %)Coal (different types of coal)|(% style="width:93px" %)4~~8%
731 -|(% style="width:53px" %)5|(% style="width:229px" %)Black car paint|(% style="width:93px" %)5%
732 -|(% style="width:53px" %)6|(% style="width:229px" %)Black Jam|(% style="width:93px" %)10%
733 -|(% style="width:53px" %)7|(% style="width:229px" %)Opaque black plastic|(% style="width:93px" %)14%
734 -|(% style="width:53px" %)8|(% style="width:229px" %)Clean rough board|(% style="width:93px" %)20%
735 -|(% style="width:53px" %)9|(% style="width:229px" %)Translucent plastic bottle|(% style="width:93px" %)62%
736 -|(% style="width:53px" %)10|(% style="width:229px" %)Carton cardboard|(% style="width:93px" %)68%
737 -|(% style="width:53px" %)11|(% style="width:229px" %)Clean pine|(% style="width:93px" %)70%
738 -|(% style="width:53px" %)12|(% style="width:229px" %)Opaque white plastic|(% style="width:93px" %)87%
739 -|(% style="width:53px" %)13|(% style="width:229px" %)White Jam|(% style="width:93px" %)90%
740 -|(% style="width:53px" %)14|(% style="width:229px" %)Kodak Standard Whiteboard|(% style="width:93px" %)100%
741 -|(% style="width:53px" %)15|(% style="width:229px" %)(((
742 -Unpolished white metal surface
743 -)))|(% style="width:93px" %)130%
744 -|(% style="width:53px" %)16|(% style="width:229px" %)Glossy light metal surface|(% style="width:93px" %)150%
745 -|(% style="width:53px" %)17|(% style="width:229px" %)stainless steel|(% style="width:93px" %)200%
746 -|(% style="width:53px" %)18|(% style="width:229px" %)Reflector plate, reflective tape|(% style="width:93px" %)>300%
747 -
748 -
749 -= 3. Configure LDS12-LB =
750 -
751 751  == 3.1 Configure Methods ==
752 752  
753 753  
... ... @@ -759,7 +759,6 @@
759 759  
760 760  * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
761 761  
762 -
763 763  == 3.2 General Commands ==
764 764  
765 765  
... ... @@ -864,36 +864,6 @@
864 864  * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
865 865  
866 866  
867 -=== 3.3.3  Set Power Output Duration ===
868 -
869 -Control the output duration 3V3(pin of VBAT_OUT) . Before each sampling, device will
870 -
871 -~1. first enable the power output to external sensor,
872 -
873 -2. keep it on as per duration, read sensor value and construct uplink payload
874 -
875 -3. final, close the power output.
876 -
877 -(% style="color:blue" %)**AT Command: AT+3V3T**
878 -
879 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
880 -|=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
881 -|(% style="width:154px" %)AT+3V3T=?|(% style="width:196px" %)Show 3V3 open time.|(% style="width:157px" %)0 (default)
882 -OK
883 -|(% style="width:154px" %)AT+3V3T=1000|(% style="width:196px" %)Close after a delay of 1000 milliseconds.|(% style="width:157px" %)OK
884 -|(% style="width:154px" %)AT+3V3T=0|(% style="width:196px" %)Always turn on the power supply of 3V3 pin.|(% style="width:157px" %)OK
885 -|(% style="width:154px" %)AT+3V3T=65535|(% style="width:196px" %)Always turn off the power supply of 3V3 pin.|(% style="width:157px" %)OK
886 -
887 -(% style="color:blue" %)**Downlink Command: 0x07**(%%)
888 -Format: Command Code (0x07) followed by 3 bytes.
889 -
890 -The first byte is 01,the second and third bytes are the time to turn on.
891 -
892 -* Example 1: Downlink Payload: 07 01 00 00  **~-~-->**  AT+3V3T=0
893 -* Example 2: Downlink Payload: 07 01 01 F4  **~-~-->**  AT+3V3T=500
894 -* Example 3: Downlink Payload: 07 01 FF FF  **~-~-->**  AT+3V3T=65535
895 -
896 -
897 897  = 4. Battery & Power Consumption =
898 898  
899 899  
... ... @@ -914,7 +914,7 @@
914 914  
915 915  * Fix bugs.
916 916  
917 -Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/w1p7ukjrx49e62r/AAB3uCNCt-koYUvMkZUPBRSca?dl=0]]**
683 +Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/zqv1vt3komgp4tu/AAC33PnXIcWOVl_UXBEAeT_xa?dl=0]]**
918 918  
919 919  Methods to Update Firmware:
920 920  
... ... @@ -922,7 +922,6 @@
922 922  
923 923  * 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]]**.
924 924  
925 -
926 926  = 6. FAQ =
927 927  
928 928  == 6.1 What is the frequency plan for LDS12-LB? ==
... ... @@ -963,7 +963,7 @@
963 963  = 8. Order Info =
964 964  
965 965  
966 -Part Number: (% style="color:blue" %)**LDS12-LB-XXX**
731 +Part Number: (% style="color:blue" %)**DS20L-XXX**
967 967  
968 968  (% style="color:red" %)**XXX**(%%): **The default frequency band**
969 969  
... ... @@ -983,13 +983,12 @@
983 983  
984 984  * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
985 985  
986 -
987 987  = 9. ​Packing Info =
988 988  
989 989  
990 990  (% style="color:#037691" %)**Package Includes**:
991 991  
992 -* LDS12-LB LoRaWAN LiDAR ToF Distance Sensor x 1
756 +* DS20L LoRaWAN Smart Distance Detector x 1
993 993  
994 994  (% style="color:#037691" %)**Dimension and weight**:
995 995  
... ... @@ -1001,7 +1001,6 @@
1001 1001  
1002 1002  * Weight / pcs : g
1003 1003  
1004 -
1005 1005  = 10. Support =
1006 1006  
1007 1007  
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