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Last modified by Xiaoling on 2025/04/27 16:45
From version 169.4
edited by Xiaoling
on 2022/06/15 09:28
Change comment: There is no comment for this version
To version 172.8
edited by Xiaoling
on 2022/06/15 10:04
Change comment: There is no comment for this version

Summary

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101 101  * 8500mAh Battery for long term use
102 102  
103 103  
104 -
105 105  == 1.3  Suitable Container & Liquid ==
106 106  
107 107  * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
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112 112  * Pure liquid without irregular deposition.
113 113  
114 114  
115 -
116 116  == 1.4  Mechanical ==
117 117  
118 118  [[image:image-20220615090910-1.png]]
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145 145  [[image:image-20220615092044-12.png]]
146 146  
147 147  
148 -(% style="color:blue" %)**Step3:  **(%%)Test the installation point.
149 149  
147 +(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
148 +
150 150  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.
151 151  
152 152  
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173 173  (% 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.
174 174  
175 175  
176 -(% style="color:blue" %)**Step4:  **(%%)Install use Epoxy ab glue.
177 177  
178 -[[image:image-20220615091045-8.png]]
176 +(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
179 179  
180 180  Prepare Eproxy AB glue.
181 181  
182 -
183 183  Put Eproxy AB glue in the sensor and press it hard on the container installation point.
184 184  
185 -
186 186  Reset LDDS20 and see if the BLUE LED is slowly blinking.
187 187  
188 -[[image:image-20220615091045-9.png]]
184 +[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
189 189  
190 -(% style="color:red" %)Note1:
191 191  
187 +(% style="color:red" %)**Note 1:**
188 +
192 192  Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
193 193  
194 194  
195 -(% style="color:red" %)Note 2:
192 +(% style="color:red" %)**Note 2:**
196 196  
197 -(% 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.
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.
198 198  
199 199  
200 200  
198 +== 1.6 ​ Applications ==
201 201  
200 +* Smart liquid control solution.
201 +* Smart liquefied gas solution.
202 202  
203 203  
204 -== 1.5 ​ Applications ==
205 205  
206 -* Horizontal distance measurement
207 -* Liquid level measurement
208 -* Parking management system
209 -* Object proximity and presence detection
210 -* Intelligent trash can management system
211 -* Robot obstacle avoidance
212 -* Automatic control
213 -* Sewer
214 -* Bottom water level monitoring
205 +== 1.7  Precautions ==
215 215  
216 -== 1.6  Pin mapping and power on ==
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.
217 217  
218 218  
219 -[[image:1654847583902-256.png]]
220 220  
213 +== 1.8  Pin mapping and power on ==
221 221  
222 222  
223 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
216 +[[image:1655257026882-201.png]]
224 224  
218 +
219 +
220 += 2.  Configure LDDS20 to connect to LoRaWAN network =
221 +
222 +
225 225  == 2.1  How it works ==
226 226  
227 227  (((
228 -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 LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
229 229  )))
230 230  
231 231  (((
232 -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.
233 233  )))
234 234  
235 235  
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241 241  )))
242 242  
243 243  (((
244 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
245 245  )))
246 246  
247 247  (((
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251 251  (((
252 252  
253 253  
254 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
252 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
255 255  )))
256 256  
257 257  (((
258 -Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
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.
259 259  )))
260 260  
261 261  [[image:image-20220607170145-1.jpeg]]
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285 285  [[image:image-20220610161353-7.png]]
286 286  
287 287  
286 +
288 288  You can also choose to create the device manually.
289 289  
290 290   [[image:image-20220610161538-8.png]]
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297 297  
298 298  
299 299  
300 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
301 301  
302 302  
303 303  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
304 304  
305 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
306 306  
307 307  
307 +
308 308  (((
309 -(% 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.
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.
310 310  )))
311 311  
312 312  [[image:1654849068701-275.png]]
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317 317  
318 318  (((
319 319  (((
320 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
321 -)))
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
322 322  
323 -(((
324 -Uplink payload includes in total 4 bytes.
325 -Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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).
326 326  )))
327 327  )))
328 328  
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349 349  === 2.3.1  Battery Info ===
350 350  
351 351  
352 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
353 353  
354 354  Ex1: 0x0B45 = 2885mV
355 355  
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360 360  === 2.3.2  Distance ===
361 361  
362 362  (((
363 -Get the distance. Flat object range 280mm - 7500mm.
361 +Get the distance. Flat object range 20mm - 2000mm.
364 364  )))
365 365  
366 366  (((
367 -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.**
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.**
368 368  )))
369 369  
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  
371 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
372 -* 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.
373 373  
372 +
374 374  === 2.3.3  Interrupt Pin ===
375 375  
376 -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.
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.
377 377  
378 378  **Example:**
379 379  
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419 419  The payload decoder function for TTN V3 is here:
420 420  
421 421  (((
422 -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/]]
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/]]
423 423  )))
424 424  
425 425  
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