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Last modified by Xiaoling on 2025/04/27 16:45
From version 151.12
edited by Xiaoling
on 2022/06/11 09:38
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To version 167.2
edited by Xiaoling
on 2022/06/15 09:21
Change comment: There is no comment for this version

Summary

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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  (((
... ... @@ -37,7 +37,7 @@
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  (((
... ... @@ -45,7 +45,7 @@
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  
104 +== 1.3  Suitable Container & Liquid ==
90 90  
106 +* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 +* Container shape is regular, and surface is smooth.
108 +* Container Thickness:
109 +** Pure metal material.  2~~8mm, best is 3~~5mm
110 +** Pure non metal material: <10 mm
111 +* Pure liquid without irregular deposition.
91 91  
92 -== 1.3  Specification ==
93 93  
94 -=== 1.3.1  Rated environmental conditions ===
114 +== 1.4  Mechanical ==
95 95  
96 -[[image:image-20220610154839-1.png]]
116 +[[image:image-20220615090910-1.png]]
97 97  
98 -(((
99 -**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)**
100 -)))
101 101  
119 +[[image:image-20220615090910-2.png]]
102 102  
103 103  
104 -=== 1.3.2  Effective measurement range Reference beam pattern ===
105 105  
106 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
123 +== 1.5  Install LDDS20 ==
107 107  
108 108  
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
109 109  
110 -[[image:1654852253176-749.png]]
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
111 111  
130 +[[image:image-20220615091045-3.png]]
112 112  
113 113  
114 -(((
115 -**(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.**
133 +
134 +(% style="color:blue" %)**Step 2**(%%): Polish the installation point.
135 +
136 +For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
137 +
138 +[[image:image-20220615092010-11.png]]
139 +
140 +
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
142 +
143 +[[image:image-20220615092044-12.png]]
144 +
145 +
146 +(% style="color:blue" %)**Step3: **(%%)Test the installation point.
147 +
148 +Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
149 +
150 +
151 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152 +
153 +
154 +
155 +|(((
156 +BLUE LED
116 116  )))
117 117  
159 +[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
118 118  
119 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
120 120  
121 121  
163 +After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
122 122  
165 +
166 +(% style="color:blue" %)LED Status:
167 +
168 +* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
169 +
170 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
171 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
172 +
173 +LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
174 +
175 +Note 2:
176 +
177 +Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
178 +
179 +
180 +(% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
181 +
182 +[[image:image-20220615091045-8.png]]
183 +
184 +Prepare Eproxy AB glue.
185 +
186 +
187 +Put Eproxy AB glue in the sensor and press it hard on the container installation point.
188 +
189 +
190 +Reset LDDS20 and see if the BLUE LED is slowly blinking.
191 +
192 +[[image:image-20220615091045-9.png]]
193 +
194 +(% style="color:red" %)Note1:
195 +
196 +Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
197 +
198 +
199 +(% style="color:red" %)Note 2:
200 +
201 +(% style="color:blue" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
202 +
203 +
204 +
205 +
206 +
207 +
123 123  == 1.5 ​ Applications ==
124 124  
125 125  * Horizontal distance measurement
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132 132  * Sewer
133 133  * Bottom water level monitoring
134 134  
135 -
136 -
137 -
138 138  == 1.6  Pin mapping and power on ==
139 139  
140 140  
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171 171  )))
172 172  
173 173  (((
256 +
257 +
174 174  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
175 175  )))
176 176  
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190 190  )))
191 191  
192 192  (((
277 +
278 +
193 193  **Add APP EUI in the application**
194 194  )))
195 195  
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289 289  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
290 290  * 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.
291 291  
292 -
293 -
294 -
295 295  === 2.3.3  Interrupt Pin ===
296 296  
297 297  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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867 867  * Solid ON for 5 seconds once device successful Join the network.
868 868  * Blink once when device transmit a packet.
869 869  
870 -
871 -
872 -
873 873  == 2.8  ​Firmware Change Log ==
874 874  
875 875  
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1086 1086  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1087 1087  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1088 1088  
1089 -
1090 -
1091 -
1092 1092  = 4.  FAQ =
1093 1093  
1094 1094  == 4.1  What is the frequency plan for LDDS75? ==
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