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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 170.7
edited by Xiaoling
on 2022/06/15 09:47
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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Content
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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]]
... ... @@ -202,8 +202,6 @@
202 202  * Smart liquid control solution.
203 203  * Smart liquefied gas solution.
204 204  
205 -
206 -
207 207  == 1.7  Precautions ==
208 208  
209 209  * 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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210 210  * 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.
211 211  * 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.
212 212  
213 -
214 -
215 215  == 1.8  Pin mapping and power on ==
216 216  
217 217  
... ... @@ -225,7 +225,7 @@
225 225  == 2.1  How it works ==
226 226  
227 227  (((
228 -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.
229 229  )))
230 230  
231 231  (((
... ... @@ -241,7 +241,7 @@
241 241  )))
242 242  
243 243  (((
244 -[[image:1654848616367-242.png]]
236 +[[image:1655257698953-697.png]]
245 245  )))
246 246  
247 247  (((
... ... @@ -251,11 +251,11 @@
251 251  (((
252 252  
253 253  
254 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
246 +(% 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.
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.
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  
280 +
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
293 +(% 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]]
298 +[[image:image-20220615095102-14.png]]
306 306  
307 307  
301 +
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.
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.
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 -)))
314 +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
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).
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.
344 +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.
355 +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.**
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.**
368 368  )))
369 369  
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.
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 -
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.
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.
377 377  
378 378  **Example:**
379 379  
... ... @@ -419,17 +419,41 @@
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/]]
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/]]
423 423  )))
424 424  
425 425  
426 426  
427 -== 2.4  Uplink Interval ==
418 +== 2.4  Downlink Payload ==
428 428  
429 -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.
430 430  
422 +[[image:image-20220615100930-15.png]]
431 431  
432 432  
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 +
433 433  == 2.5  ​Show Data in DataCake IoT Server ==
434 434  
435 435  (((
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457 457  
458 458  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
459 459  
460 -(% 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)(%%)**
461 461  
462 462  [[image:1654851029373-510.png]]
463 463  
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