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Last modified by Xiaoling on 2025/04/27 16:45
From version 150.20
edited by Xiaoling
on 2022/06/11 08:50
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To version 157.2
edited by Xiaoling
on 2022/06/15 09:09
Change comment: There is no comment for this version

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Title
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1 -LDDS75 - LoRaWAN Distance Detection Sensor User Manual
1 +LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
Content
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1 1  (% style="text-align:center" %)
2 -[[image:1654846127817-788.png]]
2 +[[image:1655254599445-662.png]]
3 3  
4 -**Contents:**
5 5  
6 -{{toc/}}
7 7  
8 8  
7 +**Table of Contents:**
9 9  
10 10  
11 11  
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12 12  
13 13  
14 14  
14 +
15 +
15 15  = 1.  Introduction =
16 16  
17 -== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
18 +== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
18 18  
19 19  (((
20 20  
21 21  
22 22  (((
23 -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.
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 +)))
24 24  
29 +(((
30 +
31 +)))
25 25  
26 -It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
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 +)))
27 27  
37 +(((
38 +
39 +)))
28 28  
29 -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.
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 +)))
30 30  
45 +(((
46 +
47 +)))
31 31  
32 -LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
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 +)))
33 33  
53 +(((
54 +
55 +)))
34 34  
35 -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.
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 +)))
36 36  
61 +(((
62 +
63 +)))
37 37  
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.
67 +)))
68 +
69 +(((
70 +
71 +)))
72 +)))
73 +
74 +(((
75 +(((
38 38  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
39 39  )))
40 40  )))
79 +)))
80 +)))
41 41  
42 42  
43 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
44 44  
45 45  
46 46  
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48 48  
49 49  * LoRaWAN 1.0.3 Class A
50 50  * Ultra low power consumption
51 -* Distance Detection by Ultrasonic technology
52 -* Flat object range 280mm - 7500mm
53 -* Accuracy: ±(1cm+S*0.3%) (S: Distance)
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)
54 54  * Cable Length : 25cm
55 55  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
56 56  * AT Commands to change parameters
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57 57  * Uplink on periodically
58 58  * Downlink to change configure
59 59  * IP66 Waterproof Enclosure
60 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
61 61  
62 62  
63 -== 1.3  Specification ==
64 64  
65 -=== 1.3.1  Rated environmental conditions ===
105 +== 1.3  Suitable Container & Liquid ==
66 66  
67 -[[image:image-20220610154839-1.png]]
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.
68 68  
69 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
70 70  
71 -**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)**
72 72  
116 +== 1.4  Mechanical ==
73 73  
118 +[[image:image-20220615090910-1.png]]
74 74  
75 -=== 1.3.2  Effective measurement range Reference beam pattern ===
76 76  
77 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
121 +[[image:image-20220615090910-2.png]]
78 78  
79 79  
80 80  
81 -[[image:1654852253176-749.png]]
82 -
83 -
84 -
85 -**(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.**
86 -
87 -
88 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
89 -
90 -
91 -
92 92  == 1.5 ​ Applications ==
93 93  
94 94  * Horizontal distance measurement
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101 101  * Sewer
102 102  * Bottom water level monitoring
103 103  
104 -
105 -
106 106  == 1.6  Pin mapping and power on ==
107 107  
108 108  
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139 139  )))
140 140  
141 141  (((
173 +
174 +
142 142  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
143 143  )))
144 144  
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149 149  [[image:image-20220607170145-1.jpeg]]
150 150  
151 151  
185 +(((
152 152  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
187 +)))
153 153  
189 +(((
154 154  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
191 +)))
155 155  
193 +(((
194 +
195 +
156 156  **Add APP EUI in the application**
197 +)))
157 157  
158 158  [[image:image-20220610161353-4.png]]
159 159  
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196 196  == 2.3  ​Uplink Payload ==
197 197  
198 198  (((
240 +(((
199 199  LDDS75 will uplink payload via LoRaWAN with below payload format: 
242 +)))
200 200  
244 +(((
201 201  Uplink payload includes in total 4 bytes.
202 202  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
203 203  )))
248 +)))
204 204  
205 205  (((
206 206  
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235 235  
236 236  === 2.3.2  Distance ===
237 237  
283 +(((
238 238  Get the distance. Flat object range 280mm - 7500mm.
285 +)))
239 239  
287 +(((
240 240  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 +)))
241 241  
242 242  
243 243  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
244 244  * 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.
245 245  
246 -
247 -
248 -
249 249  === 2.3.3  Interrupt Pin ===
250 250  
251 251  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.
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274 274  
275 275  === 2.3.5  Sensor Flag ===
276 276  
323 +(((
277 277  0x01: Detect Ultrasonic Sensor
325 +)))
278 278  
327 +(((
279 279  0x00: No Ultrasonic Sensor
329 +)))
280 280  
281 281  
282 282  
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289 289  
290 290  The payload decoder function for TTN V3 is here:
291 291  
342 +(((
292 292  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/]]
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293 293  
294 294  
295 295  
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818 818  == 2.8  ​Firmware Change Log ==
819 819  
820 820  
873 +(((
821 821  **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/]]
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822 822  
877 +(((
878 +
879 +)))
823 823  
881 +(((
824 824  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
883 +)))
825 825  
826 826  
827 827  
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830 830  
831 831  [[image:image-20220610172003-1.png]]
832 832  
892 +
833 833  [[image:image-20220610172003-2.png]]
834 834  
835 835  
896 +
836 836  == 2.10  Battery Analysis ==
837 837  
838 838  === 2.10.1  Battery Type ===
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843 843  The battery related documents as below:
844 844  
845 845  * (((
846 -[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
907 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
847 847  )))
848 848  * (((
849 849  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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859 859  === 2.10.2  Replace the battery ===
860 860  
861 861  (((
862 -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.
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.
863 863  )))
864 864  
865 865  (((
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867 867  )))
868 868  
869 869  (((
870 -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)
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)
871 871  )))
872 872  
873 873  
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882 882  
883 883  * (((
884 884  (((
885 -AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
946 +AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
886 886  )))
887 887  )))
888 888  * (((
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963 963  [[image:image-20220610172924-5.png]]
964 964  
965 965  
1027 +(((
966 966  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 +)))
967 967  
968 968  
969 969   [[image:image-20220610172924-6.png||height="601" width="860"]]
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987 987  (((
988 988  Format: Command Code (0x01) followed by 3 bytes time value.
989 989  
1053 +(((
990 990  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1055 +)))
991 991  
992 992  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
993 993  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
994 994  )))
1060 +)))
995 995  
996 996  
997 -
998 -)))
999 999  
1064 +
1065 +
1000 1000  == 3.3  Set Interrupt Mode ==
1001 1001  
1002 1002  Feature, Set Interrupt mode for GPIO_EXIT.
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1010 1010  
1011 1011  Format: Command Code (0x06) followed by 3 bytes.
1012 1012  
1079 +(((
1013 1013  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 +)))
1014 1014  
1015 1015  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1016 1016  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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