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Last modified by Xiaoling on 2025/04/27 16:45
From version 157.2
edited by Xiaoling
on 2022/06/15 09:09
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To version 147.4
edited by Xiaoling
on 2022/06/10 17:40
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
... ... @@ -98,30 +98,37 @@
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  
103 103  
61 +== 1.3  Specification ==
104 104  
105 -== 1.3  Suitable Container & Liquid ==
63 +=== 1.3.1  Rated environmental conditions ===
106 106  
107 -* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
108 -* Container shape is regular, and surface is smooth.
109 -* Container Thickness:
110 -** Pure metal material.  2~~8mm, best is 3~~5mm
111 -** Pure non metal material: <10 mm
112 -* Pure liquid without irregular deposition.
65 +[[image:image-20220610154839-1.png]]
113 113  
67 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
114 114  
69 +**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 -== 1.4  Mechanical ==
117 117  
118 -[[image:image-20220615090910-1.png]]
119 119  
73 +=== 1.3.2  Effective measurement range Reference beam pattern ===
120 120  
121 -[[image:image-20220615090910-2.png]]
75 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
122 122  
123 123  
124 124  
79 +[[image:1654852253176-749.png]]
80 +
81 +
82 +**(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.**
83 +
84 +
85 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
86 +
87 +
88 +
125 125  == 1.5 ​ Applications ==
126 126  
127 127  * Horizontal distance measurement
... ... @@ -134,6 +134,7 @@
134 134  * Sewer
135 135  * Bottom water level monitoring
136 136  
101 +
137 137  == 1.6  Pin mapping and power on ==
138 138  
139 139  
... ... @@ -170,8 +170,6 @@
170 170  )))
171 171  
172 172  (((
173 -
174 -
175 175  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
176 176  )))
177 177  
... ... @@ -182,19 +182,11 @@
182 182  [[image:image-20220607170145-1.jpeg]]
183 183  
184 184  
185 -(((
186 186  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
187 -)))
188 188  
189 -(((
190 190  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
191 -)))
192 192  
193 -(((
194 -
195 -
196 196  **Add APP EUI in the application**
197 -)))
198 198  
199 199  [[image:image-20220610161353-4.png]]
200 200  
... ... @@ -237,15 +237,11 @@
237 237  == 2.3  ​Uplink Payload ==
238 238  
239 239  (((
240 -(((
241 241  LDDS75 will uplink payload via LoRaWAN with below payload format: 
242 -)))
243 243  
244 -(((
245 245  Uplink payload includes in total 4 bytes.
246 246  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
247 247  )))
248 -)))
249 249  
250 250  (((
251 251  
... ... @@ -256,12 +256,12 @@
256 256  **Size (bytes)**
257 257  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
258 258  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
259 -[[Distance>>||anchor="H2.3.2A0Distance"]]
210 +[[Distance>>||anchor="H2.3.3A0Distance"]]
260 260  
261 261  (unit: mm)
262 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
263 -[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
264 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
213 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
214 +[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
215 +)))|[[Sensor Flag>>path:#Sensor_Flag]]
265 265  
266 266  [[image:1654850511545-399.png]]
267 267  
... ... @@ -280,21 +280,18 @@
280 280  
281 281  === 2.3.2  Distance ===
282 282  
283 -(((
284 284  Get the distance. Flat object range 280mm - 7500mm.
285 -)))
286 286  
287 -(((
288 288  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.**
289 -)))
290 290  
291 291  
292 292  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
293 293  * 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.
294 294  
242 +
295 295  === 2.3.3  Interrupt Pin ===
296 296  
297 -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.
245 +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.
298 298  
299 299  **Example:**
300 300  
... ... @@ -320,18 +320,14 @@
320 320  
321 321  === 2.3.5  Sensor Flag ===
322 322  
323 -(((
324 324  0x01: Detect Ultrasonic Sensor
325 -)))
326 326  
327 -(((
328 328  0x00: No Ultrasonic Sensor
329 -)))
330 330  
331 331  
276 +===
277 +(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
332 332  
333 -=== 2.3.6  Decode payload in The Things Network ===
334 -
335 335  While using TTN network, you can add the payload format to decode the payload.
336 336  
337 337  
... ... @@ -339,9 +339,7 @@
339 339  
340 340  The payload decoder function for TTN V3 is here:
341 341  
342 -(((
343 343  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/]]
344 -)))
345 345  
346 346  
347 347  
... ... @@ -867,20 +867,14 @@
867 867  * Solid ON for 5 seconds once device successful Join the network.
868 868  * Blink once when device transmit a packet.
869 869  
812 +
870 870  == 2.8  ​Firmware Change Log ==
871 871  
872 872  
873 -(((
874 874  **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/]]
875 -)))
876 876  
877 -(((
878 -
879 -)))
880 880  
881 -(((
882 882  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
883 -)))
884 884  
885 885  
886 886  
... ... @@ -889,13 +889,11 @@
889 889  
890 890  [[image:image-20220610172003-1.png]]
891 891  
892 -
893 893  [[image:image-20220610172003-2.png]]
894 894  
895 895  
831 +== 2.10  Battery Analysis ==
896 896  
897 -== 2.10  Battery Analysis ==
898 -
899 899  === 2.10.1  Battery Type ===
900 900  
901 901  The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
... ... @@ -904,7 +904,7 @@
904 904  The battery related documents as below:
905 905  
906 906  * (((
907 -[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
841 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
908 908  )))
909 909  * (((
910 910  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
... ... @@ -920,7 +920,7 @@
920 920  === 2.10.2  Replace the battery ===
921 921  
922 922  (((
923 -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.
857 +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.
924 924  )))
925 925  
926 926  (((
... ... @@ -928,12 +928,12 @@
928 928  )))
929 929  
930 930  (((
931 -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)
865 +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)
932 932  )))
933 933  
934 934  
935 935  
936 -= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
870 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
937 937  
938 938  (((
939 939  (((
... ... @@ -943,7 +943,7 @@
943 943  
944 944  * (((
945 945  (((
946 -AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
880 +AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
947 947  )))
948 948  )))
949 949  * (((
... ... @@ -1024,9 +1024,7 @@
1024 1024  [[image:image-20220610172924-5.png]]
1025 1025  
1026 1026  
1027 -(((
1028 1028  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:
1029 -)))
1030 1030  
1031 1031  
1032 1032   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1042,6 +1042,8 @@
1042 1042  [[image:image-20220610173409-7.png]]
1043 1043  
1044 1044  
977 +
978 +
1045 1045  (((
1046 1046  (% style="color:#037691" %)**Downlink Command: 0x01**
1047 1047  )))
... ... @@ -1050,104 +1050,232 @@
1050 1050  (((
1051 1051  Format: Command Code (0x01) followed by 3 bytes time value.
1052 1052  
1053 -(((
1054 1054  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1055 -)))
1056 1056  
1057 1057  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1058 1058  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1059 1059  )))
1060 -)))
1061 1061  
1062 1062  
994 +
995 +)))
1063 1063  
1064 -
1065 -
1066 1066  == 3.3  Set Interrupt Mode ==
1067 1067  
1068 1068  Feature, Set Interrupt mode for GPIO_EXIT.
1069 1069  
1001 +
1070 1070  (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1071 1071  
1072 -[[image:image-20220610174917-9.png]]
1004 +[[image:image-20220610105907-1.png]]
1073 1073  
1074 1074  
1075 -(% style="color:#037691" %)**Downlink Command: 0x06**
1007 +**Downlink Command: 0x06**
1076 1076  
1077 1077  Format: Command Code (0x06) followed by 3 bytes.
1078 1078  
1079 -(((
1080 1080  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1081 -)))
1082 1082  
1083 1083  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1084 1084  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1085 1085  
1086 -= 4.  FAQ =
1087 1087  
1088 -== 4.1  What is the frequency plan for LDDS75? ==
1089 1089  
1090 -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"]]
1018 += 5.  Battery & How to replace =
1091 1091  
1020 +== 5.1  Battery Type ==
1092 1092  
1022 +(((
1023 +LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
1024 +)))
1093 1093  
1094 -== 4.2  How to change the LoRa Frequency Bands/Region ==
1026 +(((
1027 +The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
1028 +)))
1095 1095  
1096 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1097 -When downloading the images, choose the required image file for download. ​
1030 +[[image:1654593587246-335.png]]
1098 1098  
1099 1099  
1033 +Minimum Working Voltage for the LLDS12:
1100 1100  
1101 -== 4.3  Can I use LDDS75 in condensation environment? ==
1035 +LLDS12:  2.45v ~~ 3.6v
1102 1102  
1103 -LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1104 1104  
1105 1105  
1039 +== 5.2  Replace Battery ==
1106 1106  
1107 -= 5.  Trouble Shooting =
1041 +(((
1042 +Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1043 +)))
1108 1108  
1109 -== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1045 +(((
1046 +And make sure the positive and negative pins match.
1047 +)))
1110 1110  
1111 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1112 1112  
1113 1113  
1114 -== 5.2  AT Command input doesn't work ==
1051 +== 5.3  Power Consumption Analyze ==
1115 1115  
1053 +(((
1054 +Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
1055 +)))
1056 +
1057 +(((
1058 +Instruction to use as below:
1059 +)))
1060 +
1061 +
1062 +**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1063 +
1064 +[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
1065 +
1066 +
1067 +**Step 2**: Open it and choose
1068 +
1069 +* Product Model
1070 +* Uplink Interval
1071 +* Working Mode
1072 +
1073 +And the Life expectation in difference case will be shown on the right.
1074 +
1075 +[[image:1654593605679-189.png]]
1076 +
1077 +
1078 +The battery related documents as below:
1079 +
1080 +* (((
1081 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1082 +)))
1083 +* (((
1084 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1085 +)))
1086 +* (((
1087 +[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
1088 +)))
1089 +
1090 +[[image:image-20220607172042-11.png]]
1091 +
1092 +
1093 +
1094 +=== 5.3.1  ​Battery Note ===
1095 +
1096 +(((
1097 +The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
1098 +)))
1099 +
1100 +
1101 +
1102 +=== ​5.3.2  Replace the battery ===
1103 +
1104 +(((
1105 +You can change the battery in the LLDS12.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
1106 +)))
1107 +
1108 +(((
1109 +The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
1110 +)))
1111 +
1112 +
1113 +
1114 += 6.  Use AT Command =
1115 +
1116 +== 6.1  Access AT Commands ==
1117 +
1118 +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.
1119 +
1120 +[[image:1654593668970-604.png]]
1121 +
1122 +**Connection:**
1123 +
1124 +(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1125 +
1126 +(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1127 +
1128 +(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1129 +
1130 +
1131 +(((
1132 +(((
1133 +In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
1134 +)))
1135 +
1136 +(((
1137 +LLDS12 will output system info once power on as below:
1138 +)))
1139 +)))
1140 +
1141 +
1142 + [[image:1654593712276-618.png]]
1143 +
1144 +Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1145 +
1146 +
1147 += 7.  FAQ =
1148 +
1149 +== 7.1  How to change the LoRa Frequency Bands/Region ==
1150 +
1151 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1152 +When downloading the images, choose the required image file for download. ​
1153 +
1154 +
1155 += 8.  Trouble Shooting =
1156 +
1157 +== 8.1  AT Commands input doesn’t work ==
1158 +
1159 +
1160 +(((
1116 1116  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.
1162 +)))
1117 1117  
1164 +
1165 +== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
1166 +
1167 +
1118 1118  (((
1169 +(% 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.)
1170 +)))
1171 +
1172 +(((
1173 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
1174 +)))
1175 +
1176 +(((
1119 1119  
1120 1120  )))
1121 1121  
1180 +(((
1181 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1182 +)))
1122 1122  
1123 -= 6.  Order Info =
1184 +(((
1185 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1186 +)))
1124 1124  
1125 1125  
1126 -Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1127 1127  
1190 += 9.  Order Info =
1128 1128  
1129 -(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1130 1130  
1131 -* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1132 -* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1133 -* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1134 -* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1135 -* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1136 -* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1137 -* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1138 -* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1193 +Part Number: (% style="color:blue" %)**LLDS12-XX**
1139 1139  
1140 -(% style="color:blue" %)**YY**(%%): Battery Option
1141 1141  
1142 -* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1143 -* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1196 +(% style="color:blue" %)**XX**(%%): The default frequency band
1144 1144  
1145 -= 7. ​ Packing Info =
1198 +* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
1199 +* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1200 +* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1201 +* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1202 +* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1203 +* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1204 +* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1205 +* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1146 1146  
1207 += 10. ​ Packing Info =
1147 1147  
1209 +
1148 1148  **Package Includes**:
1149 1149  
1150 -* LDDS75 LoRaWAN Distance Detection Sensor x 1
1212 +* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1151 1151  
1152 1152  **Dimension and weight**:
1153 1153  
... ... @@ -1156,7 +1156,7 @@
1156 1156  * Package Size / pcs : cm
1157 1157  * Weight / pcs : g
1158 1158  
1159 -= 8.  ​Support =
1221 += 11.  ​Support =
1160 1160  
1161 1161  * 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.
1162 1162  * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].
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