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Last modified by Xiaoling on 2025/04/27 16:45
From version 154.2
edited by Xiaoling
on 2022/06/15 09:00
Change comment: There is no comment for this version
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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22 22  
23 23  (((
24 24  (((
25 -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
26 26  )))
27 27  
28 28  (((
29 -It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
30 +
30 30  )))
31 31  
32 32  (((
33 -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.
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**. 
34 34  )))
35 35  
36 36  (((
37 -LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
38 +
38 38  )))
39 39  
40 40  (((
41 -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.
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.
42 42  )))
43 43  
44 44  (((
46 +
47 +)))
48 +
49 +(((
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.
51 +)))
52 +
53 +(((
54 +
55 +)))
56 +
57 +(((
58 +LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 +)))
60 +
61 +(((
62 +
63 +)))
64 +
65 +(((
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 +(((
45 45  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
46 46  )))
47 47  )))
48 48  )))
80 +)))
49 49  
50 50  
51 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
52 52  
53 53  
54 54  
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56 56  
57 57  * LoRaWAN 1.0.3 Class A
58 58  * Ultra low power consumption
59 -* Distance Detection by Ultrasonic technology
60 -* Flat object range 280mm - 7500mm
61 -* 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)
62 62  * Cable Length : 25cm
63 63  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
64 64  * AT Commands to change parameters
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65 65  * Uplink on periodically
66 66  * Downlink to change configure
67 67  * IP66 Waterproof Enclosure
68 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
69 69  
70 70  
71 -== 1.3  Specification ==
104 +== 1.3  Suitable Container & Liquid ==
72 72  
73 -=== 1.3.1  Rated environmental conditions ===
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.
74 74  
75 -[[image:image-20220610154839-1.png]]
76 76  
77 -(((
78 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
114 +== 1.4  Mechanical ==
79 79  
80 -**~ 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)**
81 -)))
116 +[[image:image-20220615090910-1.png]]
82 82  
83 83  
119 +[[image:image-20220615090910-2.png]]
84 84  
85 -=== 1.3.2  Effective measurement range Reference beam pattern ===
86 86  
87 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
88 88  
123 +== 1.5  Install LDDS20 ==
89 89  
90 90  
91 -[[image:1654852253176-749.png]]
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
92 92  
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
93 93  
130 +[[image:image-20220615091045-3.png]]
94 94  
95 -(((
96 -**(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.**
132 +
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
97 97  )))
98 98  
159 +[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
99 99  
100 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
101 101  
102 102  
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.
103 103  
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 +
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207 +
104 104  == 1.5 ​ Applications ==
105 105  
106 106  * Horizontal distance measurement
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113 113  * Sewer
114 114  * Bottom water level monitoring
115 115  
116 -
117 117  == 1.6  Pin mapping and power on ==
118 118  
119 119  
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272 272  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
273 273  * 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.
274 274  
275 -
276 276  === 2.3.3  Interrupt Pin ===
277 277  
278 278  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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848 848  * Solid ON for 5 seconds once device successful Join the network.
849 849  * Blink once when device transmit a packet.
850 850  
851 -
852 852  == 2.8  ​Firmware Change Log ==
853 853  
854 854  
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1065 1065  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1066 1066  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1067 1067  
1068 -
1069 1069  = 4.  FAQ =
1070 1070  
1071 1071  == 4.1  What is the frequency plan for LDDS75? ==
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1125 1125  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1126 1126  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1127 1127  
1128 -
1129 1129  = 7. ​ Packing Info =
1130 1130  
1131 1131  
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1140 1140  * Package Size / pcs : cm
1141 1141  * Weight / pcs : g
1142 1142  
1143 -
1144 1144  = 8.  ​Support =
1145 1145  
1146 1146  * 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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