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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 173.4
edited by Xiaoling
on 2022/06/15 10:13
Change comment: There is no comment for this version
To version 169.6
edited by Xiaoling
on 2022/06/15 09:34
Change comment: There is no comment for this version

Summary

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100 100  * IP66 Waterproof Enclosure
101 101  * 8500mAh Battery for long term use
102 102  
103 +
103 103  == 1.3  Suitable Container & Liquid ==
104 104  
105 105  * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
... ... @@ -109,6 +109,7 @@
109 109  ** Pure non metal material: <10 mm
110 110  * Pure liquid without irregular deposition.
111 111  
113 +
112 112  == 1.4  Mechanical ==
113 113  
114 114  [[image:image-20220615090910-1.png]]
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141 141  [[image:image-20220615092044-12.png]]
142 142  
143 143  
144 -
145 145  (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
146 146  
147 147  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.
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170 170  (% 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.
171 171  
172 172  
173 -
174 174  (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175 175  
176 +
176 176  Prepare Eproxy AB glue.
177 177  
178 178  Put Eproxy AB glue in the sensor and press it hard on the container installation point.
... ... @@ -193,35 +193,35 @@
193 193  
194 194  
195 195  
196 -== 1.6 ​ Applications ==
197 +== 1.5 ​ Applications ==
197 197  
198 -* Smart liquid control solution.
199 -* Smart liquefied gas solution.
199 +* Horizontal distance measurement
200 +* Liquid level measurement
201 +* Parking management system
202 +* Object proximity and presence detection
203 +* Intelligent trash can management system
204 +* Robot obstacle avoidance
205 +* Automatic control
206 +* Sewer
207 +* Bottom water level monitoring
200 200  
201 -== 1.7  Precautions ==
209 +== 1.6  Pin mapping and power on ==
202 202  
203 -* 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.
204 -* 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.
205 -* 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.
206 206  
207 -== 1.8  Pin mapping and power on ==
212 +[[image:1654847583902-256.png]]
208 208  
209 209  
210 -[[image:1655257026882-201.png]]
211 211  
216 += 2.  Configure LDDS75 to connect to LoRaWAN network =
212 212  
213 -
214 -= 2.  Configure LDDS20 to connect to LoRaWAN network =
215 -
216 -
217 217  == 2.1  How it works ==
218 218  
219 219  (((
220 -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.
221 +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
221 221  )))
222 222  
223 223  (((
224 -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.
225 +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.
225 225  )))
226 226  
227 227  
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233 233  )))
234 234  
235 235  (((
236 -[[image:1655257698953-697.png]]
237 +[[image:1654848616367-242.png]]
237 237  )))
238 238  
239 239  (((
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243 243  (((
244 244  
245 245  
246 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
247 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
247 247  )))
248 248  
249 249  (((
250 -Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
251 +Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
251 251  )))
252 252  
253 253  [[image:image-20220607170145-1.jpeg]]
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277 277  [[image:image-20220610161353-7.png]]
278 278  
279 279  
280 -
281 281  You can also choose to create the device manually.
282 282  
283 283   [[image:image-20220610161538-8.png]]
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290 290  
291 291  
292 292  
293 -(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
293 +(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
294 294  
295 295  
296 296  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
297 297  
298 -[[image:image-20220615095102-14.png]]
298 +[[image:image-20220610161724-10.png]]
299 299  
300 300  
301 -
302 302  (((
303 -(% 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.
302 +(% 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.
304 304  )))
305 305  
306 306  [[image:1654849068701-275.png]]
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311 311  
312 312  (((
313 313  (((
314 -LDDS20 will uplink payload via LoRaWAN with below payload format: 
313 +LDDS75 will uplink payload via LoRaWAN with below payload format: 
314 +)))
315 315  
316 -Uplink payload includes in total 8 bytes.
317 -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).
316 +(((
317 +Uplink payload includes in total 4 bytes.
318 +Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
318 318  )))
319 319  )))
320 320  
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341 341  === 2.3.1  Battery Info ===
342 342  
343 343  
344 -Check the battery voltage for LDDS20.
345 +Check the battery voltage for LDDS75.
345 345  
346 346  Ex1: 0x0B45 = 2885mV
347 347  
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352 352  === 2.3.2  Distance ===
353 353  
354 354  (((
355 -Get the distance. Flat object range 20mm - 2000mm.
356 +Get the distance. Flat object range 280mm - 7500mm.
356 356  )))
357 357  
358 358  (((
359 -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.**
360 +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.**
360 360  )))
361 361  
362 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
363 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
364 364  
364 +* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
365 +* 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.
366 +
365 365  === 2.3.3  Interrupt Pin ===
366 366  
367 -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.
369 +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.
368 368  
369 369  **Example:**
370 370  
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410 410  The payload decoder function for TTN V3 is here:
411 411  
412 412  (((
413 -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/]]
415 +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/]]
414 414  )))
415 415  
416 416  
417 417  
418 -== 2.4  Downlink Payload ==
420 +== 2.4  Uplink Interval ==
419 419  
420 -By default, LDDS20 prints the downlink payload to console port.
422 +The LDDS75 by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]]
421 421  
422 -[[image:image-20220615100930-15.png]]
423 423  
424 424  
425 -**Examples:**
426 -
427 -
428 -* (% style="color:blue" %)**Set TDC**
429 -
430 -If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
431 -
432 -Payload:    01 00 00 1E    TDC=30S
433 -
434 -Payload:    01 00 00 3C    TDC=60S
435 -
436 -
437 -* (% style="color:blue" %)**Reset**
438 -
439 -If payload = 0x04FF, it will reset the LDDS20
440 -
441 -
442 -* (% style="color:blue" %)**CFM**
443 -
444 -Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
445 -
446 -
447 -
448 448  == 2.5  ​Show Data in DataCake IoT Server ==
449 449  
450 450  (((
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472 472  
473 473  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
474 474  
475 -(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
453 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
476 476  
477 477  [[image:1654851029373-510.png]]
478 478  
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