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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 172.8
edited by Xiaoling
on 2022/06/15 10:04
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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131 131  
132 132  
133 133  
134 -(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
134 +(% style="color:blue" %)**Step 2**(%%): Polish the installation point.
135 135  
136 136  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.
137 137  
... ... @@ -140,24 +140,30 @@
140 140  
141 141  No polish needed if the container is shine metal surface without paint or non-metal container.
142 142  
143 -[[image:image-20220615092044-12.png]]
143 +[[image:image-20220615092044-12.png]]
144 144  
145 145  
146 +(% style="color:blue" %)**Step3: **(%%)Test the installation point.
146 146  
147 -(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
148 -
149 149  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.
150 150  
151 151  
152 152  It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
153 153  
154 -[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
155 155  
156 156  
155 +|(((
156 +BLUE LED
157 +)))
158 +
159 +[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
160 +
161 +
162 +
157 157  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.
158 158  
159 159  
160 -(% style="color:red" %)**LED Status:**
166 +(% style="color:blue" %)LED Status:
161 161  
162 162  * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
163 163  
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166 166  
167 167  LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
168 168  
175 +Note 2:
169 169  
170 -(% style="color:red" %)**Note 2:**
177 +Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
171 171  
172 -(% 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.
173 173  
180 +(% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
174 174  
182 +[[image:image-20220615091045-8.png]]
175 175  
176 -(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
177 -
178 178  Prepare Eproxy AB glue.
179 179  
186 +
180 180  Put Eproxy AB glue in the sensor and press it hard on the container installation point.
181 181  
189 +
182 182  Reset LDDS20 and see if the BLUE LED is slowly blinking.
183 183  
184 -[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
192 +[[image:image-20220615091045-9.png]]
185 185  
194 +(% style="color:red" %)Note1:
186 186  
187 -(% style="color:red" %)**Note 1:**
188 -
189 189  Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
190 190  
191 191  
192 -(% style="color:red" %)**Note 2:**
199 +(% style="color:red" %)Note 2:
193 193  
194 -(% 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.
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.
195 195  
196 196  
197 197  
198 -== 1.6 ​ Applications ==
199 199  
200 -* Smart liquid control solution.
201 -* Smart liquefied gas solution.
202 202  
203 203  
208 +== 1.5 ​ Applications ==
204 204  
205 -== 1.7  Precautions ==
210 +* Horizontal distance measurement
211 +* Liquid level measurement
212 +* Parking management system
213 +* Object proximity and presence detection
214 +* Intelligent trash can management system
215 +* Robot obstacle avoidance
216 +* Automatic control
217 +* Sewer
218 +* Bottom water level monitoring
206 206  
207 -* 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.
208 -* 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.
209 -* 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.
220 +== 1.6  Pin mapping and power on ==
210 210  
211 211  
223 +[[image:1654847583902-256.png]]
212 212  
213 -== 1.8  Pin mapping and power on ==
214 214  
215 215  
216 -[[image:1655257026882-201.png]]
227 += 2.  Configure LDDS75 to connect to LoRaWAN network =
217 217  
218 -
219 -
220 -= 2.  Configure LDDS20 to connect to LoRaWAN network =
221 -
222 -
223 223  == 2.1  How it works ==
224 224  
225 225  (((
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 LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
232 +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
227 227  )))
228 228  
229 229  (((
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.
236 +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.
231 231  )))
232 232  
233 233  
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239 239  )))
240 240  
241 241  (((
242 -[[image:1655257698953-697.png]]
248 +[[image:1654848616367-242.png]]
243 243  )))
244 244  
245 245  (((
... ... @@ -249,11 +249,11 @@
249 249  (((
250 250  
251 251  
252 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
258 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
253 253  )))
254 254  
255 255  (((
256 -Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
262 +Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
257 257  )))
258 258  
259 259  [[image:image-20220607170145-1.jpeg]]
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283 283  [[image:image-20220610161353-7.png]]
284 284  
285 285  
286 -
287 287  You can also choose to create the device manually.
288 288  
289 289   [[image:image-20220610161538-8.png]]
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296 296  
297 297  
298 298  
299 -(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
304 +(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
300 300  
301 301  
302 302  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
303 303  
304 -[[image:image-20220615095102-14.png]]
309 +[[image:image-20220610161724-10.png]]
305 305  
306 306  
307 -
308 308  (((
309 -(% style="color:blue" %)**Step 3**(%%)**:**  The LDDS20 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
313 +(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
310 310  )))
311 311  
312 312  [[image:1654849068701-275.png]]
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317 317  
318 318  (((
319 319  (((
320 -LDDS20 will uplink payload via LoRaWAN with below payload format: 
324 +LDDS75 will uplink payload via LoRaWAN with below payload format: 
325 +)))
321 321  
322 -Uplink payload includes in total 8 bytes.
323 -Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
327 +(((
328 +Uplink payload includes in total 4 bytes.
329 +Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
324 324  )))
325 325  )))
326 326  
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347 347  === 2.3.1  Battery Info ===
348 348  
349 349  
350 -Check the battery voltage for LDDS20.
356 +Check the battery voltage for LDDS75.
351 351  
352 352  Ex1: 0x0B45 = 2885mV
353 353  
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358 358  === 2.3.2  Distance ===
359 359  
360 360  (((
361 -Get the distance. Flat object range 20mm - 2000mm.
367 +Get the distance. Flat object range 280mm - 7500mm.
362 362  )))
363 363  
364 364  (((
365 -For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
371 +For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
366 366  )))
367 367  
368 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
369 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
370 370  
375 +* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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.
371 371  
372 -
373 373  === 2.3.3  Interrupt Pin ===
374 374  
375 -This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
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.
376 376  
377 377  **Example:**
378 378  
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418 418  The payload decoder function for TTN V3 is here:
419 419  
420 420  (((
421 -LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
426 +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/]]
422 422  )))
423 423  
424 424  
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