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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 150.36
edited by Xiaoling
on 2022/06/11 09:12
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Title
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1 -LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
1 +LDDS75 - LoRaWAN Distance Detection Sensor User Manual
Content
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1 1  (% style="text-align:center" %)
2 -[[image:1655254599445-662.png]]
2 +[[image:1654846127817-788.png]]
3 3  
4 +**Contents:**
4 4  
6 +{{toc/}}
5 5  
6 6  
7 -**Table of Contents:**
8 8  
9 9  
10 10  
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11 11  
12 12  
13 13  
14 -
15 -
16 16  = 1.  Introduction =
17 17  
18 -== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
17 +== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
19 19  
20 20  (((
21 21  
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22 22  
23 23  (((
24 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
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.
27 27  )))
28 28  
29 29  (((
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31 31  )))
32 32  
33 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**. 
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.
35 35  )))
36 36  
37 37  (((
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39 39  )))
40 40  
41 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.
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.
43 43  )))
44 44  
45 45  (((
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47 47  )))
48 48  
49 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.
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*.
51 51  )))
52 52  
53 53  (((
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55 55  )))
56 56  
57 57  (((
58 -LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
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.
59 59  )))
60 60  
61 61  (((
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63 63  )))
64 64  
65 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 -(((
76 76  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 77  )))
78 78  )))
79 79  )))
80 -)))
81 81  
82 82  
83 -[[image:1655255122126-327.png]]
70 +[[image:1654847051249-359.png]]
84 84  
85 85  
86 86  
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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)
78 +* Distance Detection by Ultrasonic technology
79 +* Flat object range 280mm - 7500mm
80 +* 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
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98 98  * Uplink on periodically
99 99  * Downlink to change configure
100 100  * IP66 Waterproof Enclosure
101 -* 8500mAh Battery for long term use
87 +* 4000mAh or 8500mAh Battery for long term use
102 102  
103 103  
104 104  
105 -== 1.3  Suitable Container & Liquid ==
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.
92 +== 1.3  Specification ==
113 113  
94 +=== 1.3.1  Rated environmental conditions ===
114 114  
96 +[[image:image-20220610154839-1.png]]
115 115  
116 -== 1.4  Mechanical ==
98 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
117 117  
118 -[[image:image-20220615090910-1.png]]
100 +**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)**
119 119  
120 120  
121 -[[image:image-20220615090910-2.png]]
122 122  
104 +=== 1.3.2  Effective measurement range Reference beam pattern ===
123 123  
106 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
124 124  
108 +
109 +
110 +[[image:1654852253176-749.png]]
111 +
112 +
113 +
114 +**(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.**
115 +
116 +
117 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
118 +
119 +
120 +
125 125  == 1.5 ​ Applications ==
126 126  
127 127  * Horizontal distance measurement
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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  
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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  
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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  
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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  
273 +
295 295  === 2.3.3  Interrupt Pin ===
296 296  
297 297  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.
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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  
332 332  
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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  
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867 867  * Solid ON for 5 seconds once device successful Join the network.
868 868  * Blink once when device transmit a packet.
869 869  
843 +
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  
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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"]]
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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  
1025 +
1026 +)))
1063 1063  
1064 -
1065 -
1066 1066  == 3.3  Set Interrupt Mode ==
1067 1067  
1068 1068  Feature, Set Interrupt mode for GPIO_EXIT.
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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  
1046 +
1047 +
1086 1086  = 4.  FAQ =
1087 1087  
1088 1088  == 4.1  What is the frequency plan for LDDS75? ==
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1142 1142  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1143 1143  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1144 1144  
1107 +
1108 +
1145 1145  = 7. ​ Packing Info =
1146 1146  
1147 1147  
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1156 1156  * Package Size / pcs : cm
1157 1157  * Weight / pcs : g
1158 1158  
1123 +
1124 +
1159 1159  = 8.  ​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.
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