Last modified by Xiaoling on 2025/04/27 16:45
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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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130 130  * Sewer
131 131  * Bottom water level monitoring
132 132  
133 -
134 -
135 135  == 1.6  Pin mapping and power on ==
136 136  
137 137  
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168 168  )))
169 169  
170 170  (((
183 +
184 +
171 171  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
172 172  )))
173 173  
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178 178  [[image:image-20220607170145-1.jpeg]]
179 179  
180 180  
195 +(((
181 181  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
197 +)))
182 182  
199 +(((
183 183  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
201 +)))
184 184  
203 +(((
204 +
205 +
185 185  **Add APP EUI in the application**
207 +)))
186 186  
187 187  [[image:image-20220610161353-4.png]]
188 188  
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225 225  == 2.3  ​Uplink Payload ==
226 226  
227 227  (((
250 +(((
228 228  LDDS75 will uplink payload via LoRaWAN with below payload format: 
252 +)))
229 229  
254 +(((
230 230  Uplink payload includes in total 4 bytes.
231 231  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
232 232  )))
258 +)))
233 233  
234 234  (((
235 235  
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264 264  
265 265  === 2.3.2  Distance ===
266 266  
293 +(((
267 267  Get the distance. Flat object range 280mm - 7500mm.
295 +)))
268 268  
297 +(((
269 269  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 +)))
270 270  
271 271  
272 272  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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300 300  
301 301  === 2.3.5  Sensor Flag ===
302 302  
333 +(((
303 303  0x01: Detect Ultrasonic Sensor
335 +)))
304 304  
337 +(((
305 305  0x00: No Ultrasonic Sensor
339 +)))
306 306  
307 307  
308 308  
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315 315  
316 316  The payload decoder function for TTN V3 is here:
317 317  
352 +(((
318 318  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 +)))
319 319  
320 320  
321 321  
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844 844  == 2.8  ​Firmware Change Log ==
845 845  
846 846  
883 +(((
847 847  **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 +)))
848 848  
887 +(((
888 +
889 +)))
849 849  
891 +(((
850 850  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
893 +)))
851 851  
852 852  
853 853  
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991 991  [[image:image-20220610172924-5.png]]
992 992  
993 993  
1037 +(((
994 994  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 +)))
995 995  
996 996  
997 997   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1015 1015  (((
1016 1016  Format: Command Code (0x01) followed by 3 bytes time value.
1017 1017  
1063 +(((
1018 1018  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1065 +)))
1019 1019  
1020 1020  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1021 1021  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1022 1022  )))
1070 +)))
1023 1023  
1024 1024  
1025 -
1026 -)))
1027 1027  
1074 +
1075 +
1028 1028  == 3.3  Set Interrupt Mode ==
1029 1029  
1030 1030  Feature, Set Interrupt mode for GPIO_EXIT.
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1038 1038  
1039 1039  Format: Command Code (0x06) followed by 3 bytes.
1040 1040  
1089 +(((
1041 1041  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 +)))
1042 1042  
1043 1043  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1044 1044  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1655254599445-662.png
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