Last modified by Xiaoling on 2025/04/27 16:45
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From version < 150.42 >
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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 70  [[image:1654847051249-359.png]]
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86 86  * IP66 Waterproof Enclosure
87 87  * 4000mAh or 8500mAh Battery for long term use
88 88  
89 -
90 90  == 1.3  Specification ==
91 91  
92 92  === 1.3.1  Rated environmental conditions ===
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94 94  [[image:image-20220610154839-1.png]]
95 95  
96 96  (((
97 -**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)**
109 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
110 +
111 +**~ 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)**
98 98  )))
99 99  
100 100  
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109 109  
110 110  
111 111  
126 +(((
112 112  **(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.**
128 +)))
113 113  
114 114  
115 115  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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128 128  * Sewer
129 129  * Bottom water level monitoring
130 130  
131 -
132 -
133 133  == 1.6  Pin mapping and power on ==
134 134  
135 135  
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166 166  )))
167 167  
168 168  (((
183 +
184 +
169 169  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
170 170  )))
171 171  
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176 176  [[image:image-20220607170145-1.jpeg]]
177 177  
178 178  
195 +(((
179 179  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
197 +)))
180 180  
199 +(((
181 181  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
201 +)))
182 182  
203 +(((
204 +
205 +
183 183  **Add APP EUI in the application**
207 +)))
184 184  
185 185  [[image:image-20220610161353-4.png]]
186 186  
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223 223  == 2.3  ​Uplink Payload ==
224 224  
225 225  (((
250 +(((
226 226  LDDS75 will uplink payload via LoRaWAN with below payload format: 
252 +)))
227 227  
254 +(((
228 228  Uplink payload includes in total 4 bytes.
229 229  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
230 230  )))
258 +)))
231 231  
232 232  (((
233 233  
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262 262  
263 263  === 2.3.2  Distance ===
264 264  
293 +(((
265 265  Get the distance. Flat object range 280mm - 7500mm.
295 +)))
266 266  
297 +(((
267 267  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.**
299 +)))
268 268  
269 269  
270 270  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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298 298  
299 299  === 2.3.5  Sensor Flag ===
300 300  
333 +(((
301 301  0x01: Detect Ultrasonic Sensor
335 +)))
302 302  
337 +(((
303 303  0x00: No Ultrasonic Sensor
339 +)))
304 304  
305 305  
306 306  
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313 313  
314 314  The payload decoder function for TTN V3 is here:
315 315  
352 +(((
316 316  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/]]
354 +)))
317 317  
318 318  
319 319  
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842 842  == 2.8  ​Firmware Change Log ==
843 843  
844 844  
883 +(((
845 845  **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/]]
885 +)))
846 846  
887 +(((
888 +
889 +)))
847 847  
891 +(((
848 848  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
893 +)))
849 849  
850 850  
851 851  
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989 989  [[image:image-20220610172924-5.png]]
990 990  
991 991  
1037 +(((
992 992  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:
1039 +)))
993 993  
994 994  
995 995   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1013 1013  (((
1014 1014  Format: Command Code (0x01) followed by 3 bytes time value.
1015 1015  
1063 +(((
1016 1016  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1065 +)))
1017 1017  
1018 1018  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1019 1019  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1020 1020  )))
1070 +)))
1021 1021  
1022 1022  
1023 -
1024 -)))
1025 1025  
1074 +
1075 +
1026 1026  == 3.3  Set Interrupt Mode ==
1027 1027  
1028 1028  Feature, Set Interrupt mode for GPIO_EXIT.
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1036 1036  
1037 1037  Format: Command Code (0x06) followed by 3 bytes.
1038 1038  
1089 +(((
1039 1039  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1091 +)))
1040 1040  
1041 1041  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1042 1042  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1655254599445-662.png
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