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Last modified by Xiaoling on 2025/04/27 16:45
From version 167.2
edited by Xiaoling
on 2022/06/15 09:21
Change comment: There is no comment for this version
To version 154.2
edited by Xiaoling
on 2022/06/15 09:00
Change comment: There is no comment for this version

Summary

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Content
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22 22  
23 23  (((
24 24  (((
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 +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.
27 27  )))
28 28  
29 29  (((
30 -
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.
31 31  )))
32 32  
33 33  (((
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 +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.
35 35  )))
36 36  
37 37  (((
38 -
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*.
39 39  )))
40 40  
41 41  (((
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 +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.
43 43  )))
44 44  
45 45  (((
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 -(((
76 76  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 77  )))
78 78  )))
79 79  )))
80 -)))
81 81  
82 82  
83 -[[image:1655255122126-327.png]]
51 +[[image:1654847051249-359.png]]
84 84  
85 85  
86 86  
... ... @@ -88,10 +88,9 @@
88 88  
89 89  * LoRaWAN 1.0.3 Class A
90 90  * Ultra low power consumption
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)
59 +* Distance Detection by Ultrasonic technology
60 +* Flat object range 280mm - 7500mm
61 +* Accuracy: ±(1cm+S*0.3%) (S: Distance)
95 95  * Cable Length : 25cm
96 96  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 97  * AT Commands to change parameters
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98 98  * Uplink on periodically
99 99  * Downlink to change configure
100 100  * IP66 Waterproof Enclosure
101 -* 8500mAh Battery for long term use
68 +* 4000mAh or 8500mAh Battery for long term use
102 102  
103 103  
104 -== 1.3  Suitable Container & Liquid ==
71 +== 1.3  Specification ==
105 105  
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.
73 +=== 1.3.1  Rated environmental conditions ===
112 112  
75 +[[image:image-20220610154839-1.png]]
113 113  
114 -== 1.4  Mechanical ==
77 +(((
78 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
115 115  
116 -[[image:image-20220615090910-1.png]]
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 +)))
117 117  
118 118  
119 -[[image:image-20220615090910-2.png]]
120 120  
85 +=== 1.3.2  Effective measurement range Reference beam pattern ===
121 121  
87 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
122 122  
123 -== 1.5  Install LDDS20 ==
124 124  
125 125  
126 -(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
91 +[[image:1654852253176-749.png]]
127 127  
128 -LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
129 129  
130 -[[image:image-20220615091045-3.png]]
131 131  
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
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.**
157 157  )))
158 158  
159 -[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
160 160  
100 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
161 161  
162 162  
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.
164 164  
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 -
208 208  == 1.5 ​ Applications ==
209 209  
210 210  * Horizontal distance measurement
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217 217  * Sewer
218 218  * Bottom water level monitoring
219 219  
116 +
220 220  == 1.6  Pin mapping and power on ==
221 221  
222 222  
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375 375  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
376 376  * 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.
377 377  
275 +
378 378  === 2.3.3  Interrupt Pin ===
379 379  
380 380  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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950 950  * Solid ON for 5 seconds once device successful Join the network.
951 951  * Blink once when device transmit a packet.
952 952  
851 +
953 953  == 2.8  ​Firmware Change Log ==
954 954  
955 955  
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1166 1166  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1167 1167  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1168 1168  
1068 +
1169 1169  = 4.  FAQ =
1170 1170  
1171 1171  == 4.1  What is the frequency plan for LDDS75? ==
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1225 1225  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1226 1226  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1227 1227  
1128 +
1228 1228  = 7. ​ Packing Info =
1229 1229  
1230 1230  
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1239 1239  * Package Size / pcs : cm
1240 1240  * Weight / pcs : g
1241 1241  
1143 +
1242 1242  = 8.  ​Support =
1243 1243  
1244 1244  * 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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