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Last modified by Xiaoling on 2025/04/27 16:45
From version 150.35
edited by Xiaoling
on 2022/06/11 09:11
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To version 154.3
edited by Xiaoling
on 2022/06/15 09:04
Change comment: There is no comment for this version

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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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92 92  
93 93  [[image:image-20220610154839-1.png]]
94 94  
95 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
108 +(((
109 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
96 96  
97 -**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)**
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)**
112 +)))
98 98  
99 99  
100 100  
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108 108  
109 109  
110 110  
126 +(((
111 111  **(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 +)))
112 112  
113 113  
114 114  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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163 163  )))
164 164  
165 165  (((
183 +
184 +
166 166  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
167 167  )))
168 168  
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173 173  [[image:image-20220607170145-1.jpeg]]
174 174  
175 175  
195 +(((
176 176  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
197 +)))
177 177  
199 +(((
178 178  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
201 +)))
179 179  
203 +(((
204 +
205 +
180 180  **Add APP EUI in the application**
207 +)))
181 181  
182 182  [[image:image-20220610161353-4.png]]
183 183  
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220 220  == 2.3  ​Uplink Payload ==
221 221  
222 222  (((
250 +(((
223 223  LDDS75 will uplink payload via LoRaWAN with below payload format: 
252 +)))
224 224  
254 +(((
225 225  Uplink payload includes in total 4 bytes.
226 226  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
227 227  )))
258 +)))
228 228  
229 229  (((
230 230  
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259 259  
260 260  === 2.3.2  Distance ===
261 261  
293 +(((
262 262  Get the distance. Flat object range 280mm - 7500mm.
295 +)))
263 263  
297 +(((
264 264  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 +)))
265 265  
266 266  
267 267  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
268 268  * 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.
269 269  
270 -
271 271  === 2.3.3  Interrupt Pin ===
272 272  
273 273  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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296 296  
297 297  === 2.3.5  Sensor Flag ===
298 298  
333 +(((
299 299  0x01: Detect Ultrasonic Sensor
335 +)))
300 300  
337 +(((
301 301  0x00: No Ultrasonic Sensor
339 +)))
302 302  
303 303  
304 304  
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311 311  
312 312  The payload decoder function for TTN V3 is here:
313 313  
352 +(((
314 314  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 +)))
315 315  
316 316  
317 317  
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837 837  * Solid ON for 5 seconds once device successful Join the network.
838 838  * Blink once when device transmit a packet.
839 839  
840 -
841 841  == 2.8  ​Firmware Change Log ==
842 842  
843 843  
883 +(((
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/]]
885 +)))
845 845  
887 +(((
888 +
889 +)))
846 846  
891 +(((
847 847  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
893 +)))
848 848  
849 849  
850 850  
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988 988  [[image:image-20220610172924-5.png]]
989 989  
990 990  
1037 +(((
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:
1039 +)))
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  
1063 +(((
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.
1065 +)))
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  )))
1070 +)))
1020 1020  
1021 1021  
1022 -
1023 -)))
1024 1024  
1074 +
1075 +
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  
1089 +(((
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.
1091 +)))
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 -
1045 1045  = 4.  FAQ =
1046 1046  
1047 1047  == 4.1  What is the frequency plan for LDDS75? ==
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1101 1101  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1102 1102  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1103 1103  
1104 -
1105 -
1106 1106  = 7. ​ Packing Info =
1107 1107  
1108 1108  
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1117 1117  * Package Size / pcs : cm
1118 1118  * Weight / pcs : g
1119 1119  
1120 -
1121 -
1122 1122  = 8.  ​Support =
1123 1123  
1124 1124  * 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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