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Last modified by Xiaoling on 2025/04/27 16:45
From version 157.1
edited by Xiaoling
on 2022/06/15 09:09
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To version 170.5
edited by Xiaoling
on 2022/06/15 09:46
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Summary

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102 102  
103 103  
104 104  
105 -== 1.3  Specification ==
106 106  
107 -=== 1.3.1  Rated environmental conditions ===
106 +== 1.3  Suitable Container & Liquid ==
108 108  
109 -[[image:image-20220610154839-1.png]]
108 +* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
109 +* Container shape is regular, and surface is smooth.
110 +* Container Thickness:
111 +** Pure metal material.  2~~8mm, best is 3~~5mm
112 +** Pure non metal material: <10 mm
113 +* Pure liquid without irregular deposition.
110 110  
111 -(((
112 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
113 113  
114 -**~ 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)**
115 -)))
116 116  
117 +== 1.4  Mechanical ==
117 117  
119 +[[image:image-20220615090910-1.png]]
118 118  
119 -=== 1.3.2  Effective measurement range Reference beam pattern ===
120 120  
121 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
122 +[[image:image-20220615090910-2.png]]
122 122  
123 123  
124 124  
125 -[[image:1654852253176-749.png]]
126 +== 1.5  Install LDDS20 ==
126 126  
127 127  
129 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
128 128  
129 -(((
130 -**(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.**
131 -)))
131 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
132 132  
133 +[[image:image-20220615091045-3.png]]
133 133  
134 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
135 135  
136 136  
137 +(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
137 137  
138 -== 1.5 ​ Applications ==
139 +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.
139 139  
140 -* Horizontal distance measurement
141 -* Liquid level measurement
142 -* Parking management system
143 -* Object proximity and presence detection
144 -* Intelligent trash can management system
145 -* Robot obstacle avoidance
146 -* Automatic control
147 -* Sewer
148 -* Bottom water level monitoring
141 +[[image:image-20220615092010-11.png]]
149 149  
150 -== 1.6  Pin mapping and power on ==
151 151  
144 +No polish needed if the container is shine metal surface without paint or non-metal container.
152 152  
153 -[[image:1654847583902-256.png]]
146 +[[image:image-20220615092044-12.png]]
154 154  
155 155  
149 +(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
156 156  
157 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
151 +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.
158 158  
153 +
154 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
155 +
156 +[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
157 +
158 +
159 +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.
160 +
161 +
162 +(% style="color:red" %)**LED Status:**
163 +
164 +* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
165 +
166 +* (% 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.
167 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
168 +
169 +LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
170 +
171 +
172 +(% style="color:red" %)**Note 2:**
173 +
174 +(% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
175 +
176 +
177 +(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
178 +
179 +
180 +Prepare Eproxy AB glue.
181 +
182 +Put Eproxy AB glue in the sensor and press it hard on the container installation point.
183 +
184 +Reset LDDS20 and see if the BLUE LED is slowly blinking.
185 +
186 +[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
187 +
188 +
189 +(% style="color:red" %)**Note 1:**
190 +
191 +Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
192 +
193 +
194 +(% style="color:red" %)**Note 2:**
195 +
196 +(% style="color:red" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
197 +
198 +
199 +
200 +== 1.6 ​ Applications ==
201 +
202 +* Smart liquid control solution.
203 +* Smart liquefied gas solution.
204 +
205 +
206 +== 1.7  Precautions ==
207 +
208 +* At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
209 +* For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
210 +* When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
211 +
212 +
213 +== 1.8  Pin mapping and power on ==
214 +
215 +
216 +[[image:1655257026882-201.png]]
217 +
218 +
219 +
220 += 2.  Configure LDDS20 to connect to LoRaWAN network =
221 +
222 +
159 159  == 2.1  How it works ==
160 160  
161 161  (((
162 -The LDDS75 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
226 +The LDDS20 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
163 163  )))
164 164  
165 165  (((
166 -In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75.
230 +In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0UsingtheATCommands"]]to set the keys in the LDDS20.
167 167  )))
168 168  
169 169  
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