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Last modified by Xiaoling on 2025/04/27 16:45
From version 150.38
edited by Xiaoling
on 2022/06/11 09:13
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To version 157.2
edited by Xiaoling
on 2022/06/15 09:09
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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  
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21 21  
22 22  (((
23 23  (((
24 -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.
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
25 25  )))
26 26  
27 27  (((
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29 29  )))
30 30  
31 31  (((
32 -It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
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**. 
33 33  )))
34 34  
35 35  (((
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37 37  )))
38 38  
39 39  (((
40 -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.
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.
41 41  )))
42 42  
43 43  (((
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45 45  )))
46 46  
47 47  (((
48 -LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
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.
49 49  )))
50 50  
51 51  (((
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53 53  )))
54 54  
55 55  (((
56 -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.
58 +LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
57 57  )))
58 58  
59 59  (((
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61 61  )))
62 62  
63 63  (((
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 +(((
64 64  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
65 65  )))
66 66  )))
67 67  )))
80 +)))
68 68  
69 69  
70 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
71 71  
72 72  
73 73  
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75 75  
76 76  * LoRaWAN 1.0.3 Class A
77 77  * Ultra low power consumption
78 -* Distance Detection by Ultrasonic technology
79 -* Flat object range 280mm - 7500mm
80 -* 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)
81 81  * Cable Length : 25cm
82 82  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
83 83  * AT Commands to change parameters
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84 84  * Uplink on periodically
85 85  * Downlink to change configure
86 86  * IP66 Waterproof Enclosure
87 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
88 88  
89 89  
90 90  
91 -== 1.3  Specification ==
105 +== 1.3  Suitable Container & Liquid ==
92 92  
93 -=== 1.3.1  Rated environmental conditions ===
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.
94 94  
95 -[[image:image-20220610154839-1.png]]
96 96  
97 -(((
98 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  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)**
99 -)))
100 100  
116 +== 1.4  Mechanical ==
101 101  
118 +[[image:image-20220615090910-1.png]]
102 102  
103 -=== 1.3.2  Effective measurement range Reference beam pattern ===
104 104  
105 -**(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]]
106 106  
107 107  
108 108  
109 -[[image:1654852253176-749.png]]
110 -
111 -
112 -
113 -**(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.**
114 -
115 -
116 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
117 -
118 -
119 -
120 120  == 1.5 ​ Applications ==
121 121  
122 122  * Horizontal distance measurement
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165 165  )))
166 166  
167 167  (((
173 +
174 +
168 168  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
169 169  )))
170 170  
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175 175  [[image:image-20220607170145-1.jpeg]]
176 176  
177 177  
185 +(((
178 178  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
187 +)))
179 179  
189 +(((
180 180  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
191 +)))
181 181  
193 +(((
194 +
195 +
182 182  **Add APP EUI in the application**
197 +)))
183 183  
184 184  [[image:image-20220610161353-4.png]]
185 185  
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222 222  == 2.3  ​Uplink Payload ==
223 223  
224 224  (((
240 +(((
225 225  LDDS75 will uplink payload via LoRaWAN with below payload format: 
242 +)))
226 226  
244 +(((
227 227  Uplink payload includes in total 4 bytes.
228 228  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
229 229  )))
248 +)))
230 230  
231 231  (((
232 232  
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261 261  
262 262  === 2.3.2  Distance ===
263 263  
283 +(((
264 264  Get the distance. Flat object range 280mm - 7500mm.
285 +)))
265 265  
287 +(((
266 266  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 +)))
267 267  
268 268  
269 269  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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297 297  
298 298  === 2.3.5  Sensor Flag ===
299 299  
323 +(((
300 300  0x01: Detect Ultrasonic Sensor
325 +)))
301 301  
327 +(((
302 302  0x00: No Ultrasonic Sensor
329 +)))
303 303  
304 304  
305 305  
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312 312  
313 313  The payload decoder function for TTN V3 is here:
314 314  
342 +(((
315 315  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 +)))
316 316  
317 317  
318 318  
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841 841  == 2.8  ​Firmware Change Log ==
842 842  
843 843  
873 +(((
844 844  **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 +)))
845 845  
877 +(((
878 +
879 +)))
846 846  
881 +(((
847 847  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
883 +)))
848 848  
849 849  
850 850  
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988 988  [[image:image-20220610172924-5.png]]
989 989  
990 990  
1027 +(((
991 991  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 +)))
992 992  
993 993  
994 994   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1012 1012  (((
1013 1013  Format: Command Code (0x01) followed by 3 bytes time value.
1014 1014  
1053 +(((
1015 1015  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1055 +)))
1016 1016  
1017 1017  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1018 1018  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1019 1019  )))
1060 +)))
1020 1020  
1021 1021  
1022 -
1023 -)))
1024 1024  
1064 +
1065 +
1025 1025  == 3.3  Set Interrupt Mode ==
1026 1026  
1027 1027  Feature, Set Interrupt mode for GPIO_EXIT.
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1035 1035  
1036 1036  Format: Command Code (0x06) followed by 3 bytes.
1037 1037  
1079 +(((
1038 1038  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 +)))
1039 1039  
1040 1040  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1041 1041  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1042 1042  
1043 -
1044 1044  = 4.  FAQ =
1045 1045  
1046 1046  == 4.1  What is the frequency plan for LDDS75? ==
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1100 1100  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1101 1101  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1102 1102  
1103 -
1104 1104  = 7. ​ Packing Info =
1105 1105  
1106 1106  
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1115 1115  * Package Size / pcs : cm
1116 1116  * Weight / pcs : g
1117 1117  
1118 -
1119 1119  = 8.  ​Support =
1120 1120  
1121 1121  * 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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