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Last modified by Xiaoling on 2025/04/27 16:45
From version 155.2
edited by Xiaoling
on 2022/06/15 09:06
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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  
91 +
105 105  == 1.3  Specification ==
106 106  
107 107  === 1.3.1  Rated environmental conditions ===
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108 108  
109 109  [[image:image-20220610154839-1.png]]
110 110  
111 -(((
112 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
98 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
113 113  
114 -**~ 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 -)))
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)**
116 116  
117 117  
118 118  
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126 126  
127 127  
128 128  
129 -(((
130 130  **(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.**
131 -)))
132 132  
133 133  
134 134  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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183 183  )))
184 184  
185 185  (((
186 -
187 -
188 188  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
189 189  )))
190 190  
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195 195  [[image:image-20220607170145-1.jpeg]]
196 196  
197 197  
198 -(((
199 199  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
200 -)))
201 201  
202 -(((
203 203  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
204 -)))
205 205  
206 -(((
207 -
208 -
209 209  **Add APP EUI in the application**
210 -)))
211 211  
212 212  [[image:image-20220610161353-4.png]]
213 213  
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250 250  == 2.3  ​Uplink Payload ==
251 251  
252 252  (((
253 -(((
254 254  LDDS75 will uplink payload via LoRaWAN with below payload format: 
255 -)))
256 256  
257 -(((
258 258  Uplink payload includes in total 4 bytes.
259 259  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
260 260  )))
261 -)))
262 262  
263 263  (((
264 264  
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293 293  
294 294  === 2.3.2  Distance ===
295 295  
296 -(((
297 297  Get the distance. Flat object range 280mm - 7500mm.
298 -)))
299 299  
300 -(((
301 301  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.**
302 -)))
303 303  
304 304  
305 305  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
306 306  * 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.
307 307  
273 +
308 308  === 2.3.3  Interrupt Pin ===
309 309  
310 310  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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333 333  
334 334  === 2.3.5  Sensor Flag ===
335 335  
336 -(((
337 337  0x01: Detect Ultrasonic Sensor
338 -)))
339 339  
340 -(((
341 341  0x00: No Ultrasonic Sensor
342 -)))
343 343  
344 344  
345 345  
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352 352  
353 353  The payload decoder function for TTN V3 is here:
354 354  
355 -(((
356 356  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/]]
357 -)))
358 358  
359 359  
360 360  
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880 880  * Solid ON for 5 seconds once device successful Join the network.
881 881  * Blink once when device transmit a packet.
882 882  
843 +
883 883  == 2.8  ​Firmware Change Log ==
884 884  
885 885  
886 -(((
887 887  **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/]]
888 -)))
889 889  
890 -(((
891 -
892 -)))
893 893  
894 -(((
895 895  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
896 -)))
897 897  
898 898  
899 899  
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1037 1037  [[image:image-20220610172924-5.png]]
1038 1038  
1039 1039  
1040 -(((
1041 1041  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:
1042 -)))
1043 1043  
1044 1044  
1045 1045   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1063 1063  (((
1064 1064  Format: Command Code (0x01) followed by 3 bytes time value.
1065 1065  
1066 -(((
1067 1067  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1068 -)))
1069 1069  
1070 1070  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1071 1071  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1072 1072  )))
1073 -)))
1074 1074  
1075 1075  
1025 +
1026 +)))
1076 1076  
1077 -
1078 -
1079 1079  == 3.3  Set Interrupt Mode ==
1080 1080  
1081 1081  Feature, Set Interrupt mode for GPIO_EXIT.
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1089 1089  
1090 1090  Format: Command Code (0x06) followed by 3 bytes.
1091 1091  
1092 -(((
1093 1093  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1094 -)))
1095 1095  
1096 1096  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1097 1097  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1098 1098  
1046 +
1047 +
1099 1099  = 4.  FAQ =
1100 1100  
1101 1101  == 4.1  What is the frequency plan for LDDS75? ==
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1155 1155  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1156 1156  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1157 1157  
1107 +
1108 +
1158 1158  = 7. ​ Packing Info =
1159 1159  
1160 1160  
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1169 1169  * Package Size / pcs : cm
1170 1170  * Weight / pcs : g
1171 1171  
1123 +
1124 +
1172 1172  = 8.  ​Support =
1173 1173  
1174 1174  * 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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