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Last modified by Xiaoling on 2025/04/27 16:45
From version 169.8
edited by Xiaoling
on 2022/06/15 09:35
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To version 147.10
edited by Xiaoling
on 2022/06/10 17:47
Change comment: There is no comment for this version

Summary

Details

Page properties
Title
... ... @@ -1,1 +1,1 @@
1 -LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
1 +LDDS75 - LoRaWAN Distance Detection Sensor User Manual
Content
... ... @@ -1,97 +1,54 @@
1 1  (% style="text-align:center" %)
2 -[[image:1655254599445-662.png]]
2 +[[image:1654846127817-788.png]]
3 3  
4 +**Contents:**
4 4  
5 5  
6 6  
7 -**Table of Contents:**
8 8  
9 9  
10 10  
11 11  
12 12  
13 -
14 -
15 -
16 16  = 1.  Introduction =
17 17  
18 -== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
15 +== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
19 19  
20 20  (((
21 21  
22 22  
23 23  (((
24 -(((
25 -(((
26 -The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
27 -)))
21 +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.
28 28  
29 -(((
30 -
31 -)))
32 32  
33 -(((
34 -The LDDS20 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 (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**. 
35 -)))
24 +It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
36 36  
37 -(((
38 -
39 -)))
40 40  
41 -(((
42 -LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
43 -)))
27 +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.
44 44  
45 -(((
46 -
47 -)))
48 48  
49 -(((
50 -The LoRa wireless technology used in LDDS20 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.
51 -)))
30 +LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
52 52  
53 -(((
54 -
55 -)))
56 56  
57 -(((
58 -LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 -)))
33 +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.
60 60  
61 -(((
62 -
63 -)))
64 64  
65 -(((
66 -Each LDDS20 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.
36 +(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
67 67  )))
68 -
69 -(((
70 -
71 71  )))
72 -)))
73 73  
74 -(((
75 -(((
76 -(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 -)))
78 -)))
79 -)))
80 -)))
81 81  
41 +[[image:1654847051249-359.png]]
82 82  
83 -[[image:1655255122126-327.png]]
84 84  
85 85  
86 -
87 87  == ​1.2  Features ==
88 88  
89 89  * LoRaWAN 1.0.3 Class A
90 90  * Ultra low power consumption
91 -* Liquid Level Measurement by Ultrasonic technology
92 -* Measure through container, No need to contact Liquid.
93 -* Valid level range 20mm - 2000mm
94 -* Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
49 +* Distance Detection by Ultrasonic technology
50 +* Flat object range 280mm - 7500mm
51 +* Accuracy: ±(1cm+S*0.3%) (S: Distance)
95 95  * Cable Length : 25cm
96 96  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 97  * AT Commands to change parameters
... ... @@ -98,111 +98,48 @@
98 98  * Uplink on periodically
99 99  * Downlink to change configure
100 100  * IP66 Waterproof Enclosure
101 -* 8500mAh Battery for long term use
58 +* 4000mAh or 8500mAh Battery for long term use
102 102  
60 +== 1.3  Specification ==
103 103  
104 -== 1.3  Suitable Container & Liquid ==
62 +=== 1.3.1  Rated environmental conditions ===
105 105  
106 -* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 -* Container shape is regular, and surface is smooth.
108 -* Container Thickness:
109 -** Pure metal material.  2~~8mm, best is 3~~5mm
110 -** Pure non metal material: <10 mm
111 -* Pure liquid without irregular deposition.
64 +[[image:image-20220610154839-1.png]]
112 112  
66 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
113 113  
114 -== 1.4  Mechanical ==
68 +**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)**
115 115  
116 -[[image:image-20220615090910-1.png]]
117 117  
118 118  
119 -[[image:image-20220615090910-2.png]]
72 +=== 1.3.2  Effective measurement range Reference beam pattern ===
120 120  
74 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
121 121  
122 122  
123 -== 1.5  Install LDDS20 ==
124 124  
78 +[[image:1654852253176-749.png]]
125 125  
126 -(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
127 127  
128 -LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
81 +**(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.**
129 129  
130 -[[image:image-20220615091045-3.png]]
131 131  
84 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
132 132  
133 133  
134 -(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
135 135  
136 -For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
88 +== 1.5 ​ Applications ==
137 137  
138 -[[image:image-20220615092010-11.png]]
90 +* Horizontal distance measurement
91 +* Liquid level measurement
92 +* Parking management system
93 +* Object proximity and presence detection
94 +* Intelligent trash can management system
95 +* Robot obstacle avoidance
96 +* Automatic control
97 +* Sewer
98 +* Bottom water level monitoring
139 139  
140 -
141 -No polish needed if the container is shine metal surface without paint or non-metal container.
142 -
143 -[[image:image-20220615092044-12.png]]
144 -
145 -
146 -(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
147 -
148 -Power on LDDS75, 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.
149 -
150 -
151 -It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152 -
153 -[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
154 -
155 -
156 -After paste the LDDS20 well, power on LDDS20. 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.
157 -
158 -
159 -(% style="color:red" %)**LED Status:**
160 -
161 -* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
162 -
163 -* (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
164 -* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
165 -
166 -LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
167 -
168 -
169 -(% style="color:red" %)**Note 2:**
170 -
171 -(% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
172 -
173 -
174 -(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175 -
176 -
177 -Prepare Eproxy AB glue.
178 -
179 -Put Eproxy AB glue in the sensor and press it hard on the container installation point.
180 -
181 -Reset LDDS20 and see if the BLUE LED is slowly blinking.
182 -
183 -[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
184 -
185 -
186 -(% style="color:red" %)**Note 1:**
187 -
188 -Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
189 -
190 -
191 -(% style="color:red" %)**Note 2:**
192 -
193 -(% style="color:red" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
194 -
195 -
196 -
197 -== 1.6 ​ Applications ==
198 -
199 -
200 -
201 -* Smart liquid control solution.
202 -* Smart liquefied gas solution.
203 -
204 -
205 -
206 206  == 1.6  Pin mapping and power on ==
207 207  
208 208  
... ... @@ -239,8 +239,6 @@
239 239  )))
240 240  
241 241  (((
242 -
243 -
244 244  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
245 245  )))
246 246  
... ... @@ -251,19 +251,11 @@
251 251  [[image:image-20220607170145-1.jpeg]]
252 252  
253 253  
254 -(((
255 255  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
256 -)))
257 257  
258 -(((
259 259  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
260 -)))
261 261  
262 -(((
263 -
264 -
265 265  **Add APP EUI in the application**
266 -)))
267 267  
268 268  [[image:image-20220610161353-4.png]]
269 269  
... ... @@ -306,15 +306,11 @@
306 306  == 2.3  ​Uplink Payload ==
307 307  
308 308  (((
309 -(((
310 310  LDDS75 will uplink payload via LoRaWAN with below payload format: 
311 -)))
312 312  
313 -(((
314 314  Uplink payload includes in total 4 bytes.
315 315  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
316 316  )))
317 -)))
318 318  
319 319  (((
320 320  
... ... @@ -325,12 +325,12 @@
325 325  **Size (bytes)**
326 326  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
327 327  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
328 -[[Distance>>||anchor="H2.3.2A0Distance"]]
208 +[[Distance>>||anchor="H2.3.3A0Distance"]]
329 329  
330 330  (unit: mm)
331 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
332 -[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
333 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
211 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
212 +[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
213 +)))|[[Sensor Flag>>path:#Sensor_Flag]]
334 334  
335 335  [[image:1654850511545-399.png]]
336 336  
... ... @@ -349,13 +349,9 @@
349 349  
350 350  === 2.3.2  Distance ===
351 351  
352 -(((
353 353  Get the distance. Flat object range 280mm - 7500mm.
354 -)))
355 355  
356 -(((
357 357  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.**
358 -)))
359 359  
360 360  
361 361  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
... ... @@ -363,7 +363,7 @@
363 363  
364 364  === 2.3.3  Interrupt Pin ===
365 365  
366 -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.
242 +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.
367 367  
368 368  **Example:**
369 369  
... ... @@ -389,18 +389,14 @@
389 389  
390 390  === 2.3.5  Sensor Flag ===
391 391  
392 -(((
393 393  0x01: Detect Ultrasonic Sensor
394 -)))
395 395  
396 -(((
397 397  0x00: No Ultrasonic Sensor
398 -)))
399 399  
400 400  
273 +===
274 +(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
401 401  
402 -=== 2.3.6  Decode payload in The Things Network ===
403 -
404 404  While using TTN network, you can add the payload format to decode the payload.
405 405  
406 406  
... ... @@ -408,9 +408,7 @@
408 408  
409 409  The payload decoder function for TTN V3 is here:
410 410  
411 -(((
412 412  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/]]
413 -)))
414 414  
415 415  
416 416  
... ... @@ -939,17 +939,10 @@
939 939  == 2.8  ​Firmware Change Log ==
940 940  
941 941  
942 -(((
943 943  **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/]]
944 -)))
945 945  
946 -(((
947 -
948 -)))
949 949  
950 -(((
951 951  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
952 -)))
953 953  
954 954  
955 955  
... ... @@ -958,11 +958,9 @@
958 958  
959 959  [[image:image-20220610172003-1.png]]
960 960  
961 -
962 962  [[image:image-20220610172003-2.png]]
963 963  
964 964  
965 -
966 966  == 2.10  Battery Analysis ==
967 967  
968 968  === 2.10.1  Battery Type ===
... ... @@ -973,7 +973,7 @@
973 973  The battery related documents as below:
974 974  
975 975  * (((
976 -[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
837 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
977 977  )))
978 978  * (((
979 979  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
... ... @@ -989,7 +989,7 @@
989 989  === 2.10.2  Replace the battery ===
990 990  
991 991  (((
992 -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.
853 +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.
993 993  )))
994 994  
995 995  (((
... ... @@ -997,12 +997,12 @@
997 997  )))
998 998  
999 999  (((
1000 -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)
861 +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)
1001 1001  )))
1002 1002  
1003 1003  
1004 1004  
1005 -= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
866 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
1006 1006  
1007 1007  (((
1008 1008  (((
... ... @@ -1012,7 +1012,7 @@
1012 1012  
1013 1013  * (((
1014 1014  (((
1015 -AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
876 +AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
1016 1016  )))
1017 1017  )))
1018 1018  * (((
... ... @@ -1093,9 +1093,7 @@
1093 1093  [[image:image-20220610172924-5.png]]
1094 1094  
1095 1095  
1096 -(((
1097 1097  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:
1098 -)))
1099 1099  
1100 1100  
1101 1101   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1119,19 +1119,16 @@
1119 1119  (((
1120 1120  Format: Command Code (0x01) followed by 3 bytes time value.
1121 1121  
1122 -(((
1123 1123  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1124 -)))
1125 1125  
1126 1126  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1127 1127  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1128 1128  )))
1129 -)))
1130 1130  
1131 1131  
988 +
989 +)))
1132 1132  
1133 -
1134 -
1135 1135  == 3.3  Set Interrupt Mode ==
1136 1136  
1137 1137  Feature, Set Interrupt mode for GPIO_EXIT.
... ... @@ -1138,7 +1138,7 @@
1138 1138  
1139 1139  (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1140 1140  
1141 -[[image:image-20220610174917-9.png]]
997 +[[image:image-20220610105907-1.png]]
1142 1142  
1143 1143  
1144 1144  (% style="color:#037691" %)**Downlink Command: 0x06**
... ... @@ -1145,72 +1145,113 @@
1145 1145  
1146 1146  Format: Command Code (0x06) followed by 3 bytes.
1147 1147  
1148 -(((
1149 1149  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1150 -)))
1151 1151  
1152 1152  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1153 1153  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1154 1154  
1155 -= 4.  FAQ =
1156 1156  
1157 -== 4.1  What is the frequency plan for LDDS75? ==
1158 1158  
1159 -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"]]
1160 1160  
1012 += 6.  Use AT Command =
1161 1161  
1014 +== 6.1  Access AT Commands ==
1162 1162  
1163 -== 4.2  How to change the LoRa Frequency Bands/Region ==
1016 +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.
1164 1164  
1165 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1166 -When downloading the images, choose the required image file for download. ​
1018 +[[image:1654593668970-604.png]]
1167 1167  
1020 +**Connection:**
1168 1168  
1022 +(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1169 1169  
1170 -== 4.3  Can I use LDDS75 in condensation environment? ==
1024 +(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1171 1171  
1172 -LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1026 +(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1173 1173  
1174 1174  
1029 +(((
1030 +(((
1031 +In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
1032 +)))
1175 1175  
1176 -= 5.  Trouble Shooting =
1034 +(((
1035 +LLDS12 will output system info once power on as below:
1036 +)))
1037 +)))
1177 1177  
1178 -== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1179 1179  
1180 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1040 + [[image:1654593712276-618.png]]
1181 1181  
1042 +Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1182 1182  
1183 -== 5.2  AT Command input doesn't work ==
1184 1184  
1045 += 4.  FAQ =
1046 +
1047 +== 4.1  How to change the LoRa Frequency Bands/Region ==
1048 +
1049 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1050 +When downloading the images, choose the required image file for download. ​
1051 +
1052 +
1053 += 5.  Trouble Shooting =
1054 +
1055 +== 5.1  AT Commands input doesn’t work ==
1056 +
1057 +
1058 +(((
1185 1185  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.
1060 +)))
1186 1186  
1062 +
1063 +== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
1064 +
1065 +
1187 1187  (((
1067 +(% 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.)
1068 +)))
1069 +
1070 +(((
1071 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
1072 +)))
1073 +
1074 +(((
1188 1188  
1189 1189  )))
1190 1190  
1078 +(((
1079 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1080 +)))
1191 1191  
1082 +(((
1083 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1084 +)))
1085 +
1086 +
1087 +
1192 1192  = 6.  Order Info =
1193 1193  
1194 1194  
1195 -Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1091 +Part Number: (% style="color:blue" %)**LDDS75-XX-YY**
1196 1196  
1197 1197  
1198 -(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1094 +(% style="color:blue" %)**XX**(%%): The default frequency band
1199 1199  
1200 -* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1201 -* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1202 -* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1203 -* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1204 -* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1205 -* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1206 -* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1207 -* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1096 +* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
1097 +* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1098 +* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1099 +* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1100 +* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1101 +* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1102 +* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1103 +* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1208 1208  
1209 1209  (% style="color:blue" %)**YY**(%%): Battery Option
1210 1210  
1211 -* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1212 -* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1107 +* (% style="color:red" %)**4**(%%): 4000mAh battery
1108 +* (% style="color:red" %)**8**(%%): 8500mAh battery
1213 1213  
1110 +
1214 1214  = 7. ​ Packing Info =
1215 1215  
1216 1216  
... ... @@ -1225,6 +1225,7 @@
1225 1225  * Package Size / pcs : cm
1226 1226  * Weight / pcs : g
1227 1227  
1125 +
1228 1228  = 8.  ​Support =
1229 1229  
1230 1230  * 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.
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