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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 172.6
edited by Xiaoling
on 2022/06/15 09:58
Change comment: There is no comment for this version
To version 173.3
edited by Xiaoling
on 2022/06/15 10:11
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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203 203  * Smart liquefied gas solution.
204 204  
205 205  
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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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  
214 214  
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.
222 +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:
316 +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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369 369  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  
364 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
365 +* 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.
375 375  
376 -
377 -
378 -
379 379  === 2.3.3  Interrupt Pin ===
380 380  
381 -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.
370 +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.
382 382  
383 383  **Example:**
384 384  
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424 424  The payload decoder function for TTN V3 is here:
425 425  
426 426  (((
427 -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/]]
416 +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/]]
428 428  )))
429 429  
430 430  
431 431  
432 -== 2.4  Uplink Interval ==
421 +== 2.4  Downlink Payload ==
433 433  
434 -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"]]
423 +By default, LDDS20 prints the downlink payload to console port.
435 435  
425 +[[image:image-20220615100930-15.png]]
436 436  
437 437  
428 +**Examples:**
429 +
430 +
431 +* (% style="color:blue" %)**Set TDC**
432 +
433 +If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
434 +
435 +Payload:    01 00 00 1E    TDC=30S
436 +
437 +Payload:    01 00 00 3C    TDC=60S
438 +
439 +
440 +* (% style="color:blue" %)**Reset**
441 +
442 +If payload = 0x04FF, it will reset the LDDS20
443 +
444 +
445 +* (% style="color:blue" %)**CFM**
446 +
447 +Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
448 +
449 +
450 +
438 438  == 2.5  ​Show Data in DataCake IoT Server ==
439 439  
440 440  (((
image-20220615100930-15.png
Author
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1 +XWiki.Xiaoling
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1 +10.5 KB
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