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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  (((
... ... @@ -29,7 +29,7 @@
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  (((
... ... @@ -53,7 +53,7 @@
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  (((
... ... @@ -61,13 +61,24 @@
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 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
71 71  
72 72  
73 73  
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75 75  
76 76  * LoRaWAN 1.0.3 Class A
77 77  * Ultra low power consumption
78 -* Distance Detection by Ultrasonic technology
79 -* Flat object range 280mm - 7500mm
80 -* Accuracy: ±(1cm+S*0.3%) (S: Distance)
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)
81 81  * Cable Length : 25cm
82 82  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
83 83  * AT Commands to change parameters
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84 84  * Uplink on periodically
85 85  * Downlink to change configure
86 86  * IP66 Waterproof Enclosure
87 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
88 88  
89 89  
90 -== 1.3  Specification ==
91 91  
92 -=== 1.3.1  Rated environmental conditions ===
105 +== 1.3  Suitable Container & Liquid ==
93 93  
94 -[[image:image-20220610154839-1.png]]
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.
95 95  
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)**
98 -)))
99 99  
100 100  
116 +== 1.4  Mechanical ==
101 101  
102 -=== 1.3.2  Effective measurement range Reference beam pattern ===
118 +[[image:image-20220615090910-1.png]]
103 103  
104 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
105 105  
121 +[[image:image-20220615090910-2.png]]
106 106  
107 107  
108 -[[image:1654852253176-749.png]]
109 109  
110 -
111 -
112 -(((
113 -**(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.**
114 -)))
115 -
116 -
117 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
118 -
119 -
120 -
121 121  == 1.5 ​ Applications ==
122 122  
123 123  * Horizontal distance measurement
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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  (((
173 +
174 +
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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187 187  )))
188 188  
189 189  (((
194 +
195 +
190 190  **Add APP EUI in the application**
191 191  )))
192 192  
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314 314  
315 315  === 2.3.5  Sensor Flag ===
316 316  
323 +(((
317 317  0x01: Detect Ultrasonic Sensor
325 +)))
318 318  
327 +(((
319 319  0x00: No Ultrasonic Sensor
329 +)))
320 320  
321 321  
322 322  
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329 329  
330 330  The payload decoder function for TTN V3 is here:
331 331  
342 +(((
332 332  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 +)))
333 333  
334 334  
335 335  
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858 858  == 2.8  ​Firmware Change Log ==
859 859  
860 860  
873 +(((
861 861  **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 +)))
862 862  
877 +(((
878 +
879 +)))
863 863  
881 +(((
864 864  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
883 +)))
865 865  
866 866  
867 867  
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1005 1005  [[image:image-20220610172924-5.png]]
1006 1006  
1007 1007  
1027 +(((
1008 1008  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 +)))
1009 1009  
1010 1010  
1011 1011   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1029 1029  (((
1030 1030  Format: Command Code (0x01) followed by 3 bytes time value.
1031 1031  
1053 +(((
1032 1032  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1055 +)))
1033 1033  
1034 1034  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1035 1035  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1036 1036  )))
1060 +)))
1037 1037  
1038 1038  
1039 -
1040 -)))
1041 1041  
1064 +
1065 +
1042 1042  == 3.3  Set Interrupt Mode ==
1043 1043  
1044 1044  Feature, Set Interrupt mode for GPIO_EXIT.
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1052 1052  
1053 1053  Format: Command Code (0x06) followed by 3 bytes.
1054 1054  
1079 +(((
1055 1055  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 +)))
1056 1056  
1057 1057  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1058 1058  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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