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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 172.4
edited by Xiaoling
on 2022/06/15 09:52
Change comment: There is no comment for this version
To version 173.4
edited by Xiaoling
on 2022/06/15 10:13
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 -
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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111 111  ** Pure non metal material: <10 mm
112 112  * Pure liquid without irregular deposition.
113 113  
114 -
115 -
116 116  == 1.4  Mechanical ==
117 117  
118 118  [[image:image-20220615090910-1.png]]
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202 202  * Smart liquid control solution.
203 203  * Smart liquefied gas solution.
204 204  
205 -
206 -
207 -
208 208  == 1.7  Precautions ==
209 209  
210 210  * 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.
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211 211  * 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.
212 212  * 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.
213 213  
214 -
215 -
216 -
217 217  == 1.8  Pin mapping and power on ==
218 218  
219 219  
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227 227  == 2.1  How it works ==
228 228  
229 229  (((
230 -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.
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.
231 231  )))
232 232  
233 233  (((
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321 321  
322 322  (((
323 323  (((
324 -LDDS20 will uplink payload via LoRaWAN with below payload format:
314 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
325 325  
326 326  Uplink payload includes in total 8 bytes.
327 327  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).
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351 351  === 2.3.1  Battery Info ===
352 352  
353 353  
354 -Check the battery voltage for LDDS75.
344 +Check the battery voltage for LDDS20.
355 355  
356 356  Ex1: 0x0B45 = 2885mV
357 357  
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362 362  === 2.3.2  Distance ===
363 363  
364 364  (((
365 -Get the distance. Flat object range 280mm - 7500mm.
355 +Get the distance. Flat object range 20mm - 2000mm.
366 366  )))
367 367  
368 368  (((
369 -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.**
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.**
370 370  )))
371 371  
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.
372 372  
373 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
374 -* 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.
375 -
376 376  === 2.3.3  Interrupt Pin ===
377 377  
378 -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.
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.
379 379  
380 380  **Example:**
381 381  
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421 421  The payload decoder function for TTN V3 is here:
422 422  
423 423  (((
424 -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/]]
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/]]
425 425  )))
426 426  
427 427  
428 428  
429 -== 2.4  Uplink Interval ==
418 +== 2.4  Downlink Payload ==
430 430  
431 -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"]]
420 +By default, LDDS20 prints the downlink payload to console port.
432 432  
422 +[[image:image-20220615100930-15.png]]
433 433  
434 434  
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 +
435 435  == 2.5  ​Show Data in DataCake IoT Server ==
436 436  
437 437  (((
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459 459  
460 460  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
461 461  
462 -(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
475 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
463 463  
464 464  [[image:1654851029373-510.png]]
465 465  
image-20220615100930-15.png
Author
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1 +XWiki.Xiaoling
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