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Version 170.2 by Xiaoling on 2022/06/15 09:37
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
3
4
5
6
7 **Table of Contents:**
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14
15
16 = 1.  Introduction =
17
18 == 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
19
20 (((
21
22
23 (((
24 (((
25 (((
26 The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
27 )))
28
29 (((
30
31 )))
32
33 (((
34 The LDDS20 sensor is installed directly below the container to detect the height of the liquid level. User doesn’t need to open a hole on the container to be tested. The (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**. 
35 )))
36
37 (((
38
39 )))
40
41 (((
42 LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
43 )))
44
45 (((
46
47 )))
48
49 (((
50 The LoRa wireless technology used in LDDS20 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
51 )))
52
53 (((
54
55 )))
56
57 (((
58 LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 )))
60
61 (((
62
63 )))
64
65 (((
66 Each LDDS20 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
67 )))
68
69 (((
70
71 )))
72 )))
73
74 (((
75 (((
76 (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 )))
78 )))
79 )))
80 )))
81
82
83 [[image:1655255122126-327.png]]
84
85
86
87 == ​1.2  Features ==
88
89 * LoRaWAN 1.0.3 Class A
90 * Ultra low power consumption
91 * Liquid Level Measurement by Ultrasonic technology
92 * Measure through container, No need to contact Liquid.
93 * Valid level range 20mm - 2000mm
94 * Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
95 * Cable Length : 25cm
96 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 * AT Commands to change parameters
98 * Uplink on periodically
99 * Downlink to change configure
100 * IP66 Waterproof Enclosure
101 * 8500mAh Battery for long term use
102
103
104 == 1.3  Suitable Container & Liquid ==
105
106 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 * Container shape is regular, and surface is smooth.
108 * Container Thickness:
109 ** Pure metal material.  2~~8mm, best is 3~~5mm
110 ** Pure non metal material: <10 mm
111 * Pure liquid without irregular deposition.
112
113
114 == 1.4  Mechanical ==
115
116 [[image:image-20220615090910-1.png]]
117
118
119 [[image:image-20220615090910-2.png]]
120
121
122
123 == 1.5  Install LDDS20 ==
124
125
126 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
127
128 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
129
130 [[image:image-20220615091045-3.png]]
131
132
133
134 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
135
136 For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
137
138 [[image:image-20220615092010-11.png]]
139
140
141 No polish needed if the container is shine metal surface without paint or non-metal container.
142
143 [[image:image-20220615092044-12.png]]
144
145
146 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
147
148 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.
149
150
151 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152
153 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
154
155
156 After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
157
158
159 (% style="color:red" %)**LED Status:**
160
161 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
162
163 * (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
164 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
165
166 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
167
168
169 (% style="color:red" %)**Note 2:**
170
171 (% 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.
172
173
174 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175
176
177 Prepare Eproxy AB glue.
178
179 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
180
181 Reset LDDS20 and see if the BLUE LED is slowly blinking.
182
183 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
184
185
186 (% style="color:red" %)**Note 1:**
187
188 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
189
190
191 (% style="color:red" %)**Note 2:**
192
193 (% 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.
194
195
196
197 == 1.6 ​ Applications ==
198
199 * Smart liquid control solution.
200 * Smart liquefied gas solution.
201
202
203
204 == 1.7  Precautions ==
205
206 * 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.
207 * 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.
208 * 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.
209
210
211
212 == 1.7  Pin mapping and power on ==
213
214
215 [[image:1655257026882-201.png]]
216
217
218
219 = 2.  Configure LDDS75 to connect to LoRaWAN network =
220
221 == 2.1  How it works ==
222
223 (((
224 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
225 )))
226
227 (((
228 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.
229 )))
230
231
232
233 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
234
235 (((
236 Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LG308>>url:http://www.dragino.com/products/lora/item/140-lg308.html]] as a LoRaWAN gateway in this example.
237 )))
238
239 (((
240 [[image:1654848616367-242.png]]
241 )))
242
243 (((
244 The LG308 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.
245 )))
246
247 (((
248
249
250 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
251 )))
252
253 (((
254 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
255 )))
256
257 [[image:image-20220607170145-1.jpeg]]
258
259
260 (((
261 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
262 )))
263
264 (((
265 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
266 )))
267
268 (((
269
270
271 **Add APP EUI in the application**
272 )))
273
274 [[image:image-20220610161353-4.png]]
275
276 [[image:image-20220610161353-5.png]]
277
278 [[image:image-20220610161353-6.png]]
279
280
281 [[image:image-20220610161353-7.png]]
282
283
284 You can also choose to create the device manually.
285
286 [[image:image-20220610161538-8.png]]
287
288
289
290 **Add APP KEY and DEV EUI**
291
292 [[image:image-20220610161538-9.png]]
293
294
295
296 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
297
298
299 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
300
301 [[image:image-20220610161724-10.png]]
302
303
304 (((
305 (% 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.
306 )))
307
308 [[image:1654849068701-275.png]]
309
310
311
312 == 2.3  ​Uplink Payload ==
313
314 (((
315 (((
316 LDDS75 will uplink payload via LoRaWAN with below payload format: 
317 )))
318
319 (((
320 Uplink payload includes in total 4 bytes.
321 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
322 )))
323 )))
324
325 (((
326
327 )))
328
329 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
330 |=(% style="width: 62.5px;" %)(((
331 **Size (bytes)**
332 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
333 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
334 [[Distance>>||anchor="H2.3.2A0Distance"]]
335
336 (unit: mm)
337 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
338 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
339 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
340
341 [[image:1654850511545-399.png]]
342
343
344
345 === 2.3.1  Battery Info ===
346
347
348 Check the battery voltage for LDDS75.
349
350 Ex1: 0x0B45 = 2885mV
351
352 Ex2: 0x0B49 = 2889mV
353
354
355
356 === 2.3.2  Distance ===
357
358 (((
359 Get the distance. Flat object range 280mm - 7500mm.
360 )))
361
362 (((
363 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.**
364 )))
365
366
367 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
368 * 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.
369
370 === 2.3.3  Interrupt Pin ===
371
372 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.
373
374 **Example:**
375
376 0x00: Normal uplink packet.
377
378 0x01: Interrupt Uplink Packet.
379
380
381
382 === 2.3.4  DS18B20 Temperature sensor ===
383
384 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
385
386 **Example**:
387
388 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
389
390 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
391
392 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
393
394
395
396 === 2.3.5  Sensor Flag ===
397
398 (((
399 0x01: Detect Ultrasonic Sensor
400 )))
401
402 (((
403 0x00: No Ultrasonic Sensor
404 )))
405
406
407
408 === 2.3.6  Decode payload in The Things Network ===
409
410 While using TTN network, you can add the payload format to decode the payload.
411
412
413 [[image:1654850829385-439.png]]
414
415 The payload decoder function for TTN V3 is here:
416
417 (((
418 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/]]
419 )))
420
421
422
423 == 2.4  Uplink Interval ==
424
425 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"]]
426
427
428
429 == 2.5  ​Show Data in DataCake IoT Server ==
430
431 (((
432 [[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
433 )))
434
435 (((
436
437 )))
438
439 (((
440 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
441 )))
442
443 (((
444 (% style="color:blue" %)**Step 2**(%%)**: To configure the Application to forward data to DATACAKE you will need to add integration. To add the DATACAKE integration, perform the following steps:**
445 )))
446
447
448 [[image:1654592790040-760.png]]
449
450
451 [[image:1654592800389-571.png]]
452
453
454 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
455
456 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
457
458 [[image:1654851029373-510.png]]
459
460
461 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
462
463 [[image:image-20220610165129-11.png||height="595" width="1088"]]
464
465
466
467 == 2.6  Frequency Plans ==
468
469 (((
470 The LDDS75 uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.
471 )))
472
473
474
475 === 2.6.1  EU863-870 (EU868) ===
476
477 (((
478 (% style="color:blue" %)**Uplink:**
479 )))
480
481 (((
482 868.1 - SF7BW125 to SF12BW125
483 )))
484
485 (((
486 868.3 - SF7BW125 to SF12BW125 and SF7BW250
487 )))
488
489 (((
490 868.5 - SF7BW125 to SF12BW125
491 )))
492
493 (((
494 867.1 - SF7BW125 to SF12BW125
495 )))
496
497 (((
498 867.3 - SF7BW125 to SF12BW125
499 )))
500
501 (((
502 867.5 - SF7BW125 to SF12BW125
503 )))
504
505 (((
506 867.7 - SF7BW125 to SF12BW125
507 )))
508
509 (((
510 867.9 - SF7BW125 to SF12BW125
511 )))
512
513 (((
514 868.8 - FSK
515 )))
516
517 (((
518
519 )))
520
521 (((
522 (% style="color:blue" %)**Downlink:**
523 )))
524
525 (((
526 Uplink channels 1-9 (RX1)
527 )))
528
529 (((
530 869.525 - SF9BW125 (RX2 downlink only)
531 )))
532
533
534
535 === 2.6.2  US902-928(US915) ===
536
537 (((
538 Used in USA, Canada and South America. Default use CHE=2
539
540 (% style="color:blue" %)**Uplink:**
541
542 903.9 - SF7BW125 to SF10BW125
543
544 904.1 - SF7BW125 to SF10BW125
545
546 904.3 - SF7BW125 to SF10BW125
547
548 904.5 - SF7BW125 to SF10BW125
549
550 904.7 - SF7BW125 to SF10BW125
551
552 904.9 - SF7BW125 to SF10BW125
553
554 905.1 - SF7BW125 to SF10BW125
555
556 905.3 - SF7BW125 to SF10BW125
557
558
559 (% style="color:blue" %)**Downlink:**
560
561 923.3 - SF7BW500 to SF12BW500
562
563 923.9 - SF7BW500 to SF12BW500
564
565 924.5 - SF7BW500 to SF12BW500
566
567 925.1 - SF7BW500 to SF12BW500
568
569 925.7 - SF7BW500 to SF12BW500
570
571 926.3 - SF7BW500 to SF12BW500
572
573 926.9 - SF7BW500 to SF12BW500
574
575 927.5 - SF7BW500 to SF12BW500
576
577 923.3 - SF12BW500(RX2 downlink only)
578
579
580
581 )))
582
583 === 2.6.3  CN470-510 (CN470) ===
584
585 (((
586 Used in China, Default use CHE=1
587 )))
588
589 (((
590 (% style="color:blue" %)**Uplink:**
591 )))
592
593 (((
594 486.3 - SF7BW125 to SF12BW125
595 )))
596
597 (((
598 486.5 - SF7BW125 to SF12BW125
599 )))
600
601 (((
602 486.7 - SF7BW125 to SF12BW125
603 )))
604
605 (((
606 486.9 - SF7BW125 to SF12BW125
607 )))
608
609 (((
610 487.1 - SF7BW125 to SF12BW125
611 )))
612
613 (((
614 487.3 - SF7BW125 to SF12BW125
615 )))
616
617 (((
618 487.5 - SF7BW125 to SF12BW125
619 )))
620
621 (((
622 487.7 - SF7BW125 to SF12BW125
623 )))
624
625 (((
626
627 )))
628
629 (((
630 (% style="color:blue" %)**Downlink:**
631 )))
632
633 (((
634 506.7 - SF7BW125 to SF12BW125
635 )))
636
637 (((
638 506.9 - SF7BW125 to SF12BW125
639 )))
640
641 (((
642 507.1 - SF7BW125 to SF12BW125
643 )))
644
645 (((
646 507.3 - SF7BW125 to SF12BW125
647 )))
648
649 (((
650 507.5 - SF7BW125 to SF12BW125
651 )))
652
653 (((
654 507.7 - SF7BW125 to SF12BW125
655 )))
656
657 (((
658 507.9 - SF7BW125 to SF12BW125
659 )))
660
661 (((
662 508.1 - SF7BW125 to SF12BW125
663 )))
664
665 (((
666 505.3 - SF12BW125 (RX2 downlink only)
667 )))
668
669
670
671 === 2.6.4  AU915-928(AU915) ===
672
673 (((
674 Default use CHE=2
675
676 (% style="color:blue" %)**Uplink:**
677
678 916.8 - SF7BW125 to SF12BW125
679
680 917.0 - SF7BW125 to SF12BW125
681
682 917.2 - SF7BW125 to SF12BW125
683
684 917.4 - SF7BW125 to SF12BW125
685
686 917.6 - SF7BW125 to SF12BW125
687
688 917.8 - SF7BW125 to SF12BW125
689
690 918.0 - SF7BW125 to SF12BW125
691
692 918.2 - SF7BW125 to SF12BW125
693
694
695 (% style="color:blue" %)**Downlink:**
696
697 923.3 - SF7BW500 to SF12BW500
698
699 923.9 - SF7BW500 to SF12BW500
700
701 924.5 - SF7BW500 to SF12BW500
702
703 925.1 - SF7BW500 to SF12BW500
704
705 925.7 - SF7BW500 to SF12BW500
706
707 926.3 - SF7BW500 to SF12BW500
708
709 926.9 - SF7BW500 to SF12BW500
710
711 927.5 - SF7BW500 to SF12BW500
712
713 923.3 - SF12BW500(RX2 downlink only)
714
715
716
717 )))
718
719 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
720
721 (((
722 (% style="color:blue" %)**Default Uplink channel:**
723 )))
724
725 (((
726 923.2 - SF7BW125 to SF10BW125
727 )))
728
729 (((
730 923.4 - SF7BW125 to SF10BW125
731 )))
732
733 (((
734
735 )))
736
737 (((
738 (% style="color:blue" %)**Additional Uplink Channel**:
739 )))
740
741 (((
742 (OTAA mode, channel added by JoinAccept message)
743 )))
744
745 (((
746
747 )))
748
749 (((
750 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
751 )))
752
753 (((
754 922.2 - SF7BW125 to SF10BW125
755 )))
756
757 (((
758 922.4 - SF7BW125 to SF10BW125
759 )))
760
761 (((
762 922.6 - SF7BW125 to SF10BW125
763 )))
764
765 (((
766 922.8 - SF7BW125 to SF10BW125
767 )))
768
769 (((
770 923.0 - SF7BW125 to SF10BW125
771 )))
772
773 (((
774 922.0 - SF7BW125 to SF10BW125
775 )))
776
777 (((
778
779 )))
780
781 (((
782 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
783 )))
784
785 (((
786 923.6 - SF7BW125 to SF10BW125
787 )))
788
789 (((
790 923.8 - SF7BW125 to SF10BW125
791 )))
792
793 (((
794 924.0 - SF7BW125 to SF10BW125
795 )))
796
797 (((
798 924.2 - SF7BW125 to SF10BW125
799 )))
800
801 (((
802 924.4 - SF7BW125 to SF10BW125
803 )))
804
805 (((
806 924.6 - SF7BW125 to SF10BW125
807 )))
808
809 (((
810
811 )))
812
813 (((
814 (% style="color:blue" %)**Downlink:**
815 )))
816
817 (((
818 Uplink channels 1-8 (RX1)
819 )))
820
821 (((
822 923.2 - SF10BW125 (RX2)
823 )))
824
825
826
827 === 2.6.6  KR920-923 (KR920) ===
828
829 (((
830 (% style="color:blue" %)**Default channel:**
831 )))
832
833 (((
834 922.1 - SF7BW125 to SF12BW125
835 )))
836
837 (((
838 922.3 - SF7BW125 to SF12BW125
839 )))
840
841 (((
842 922.5 - SF7BW125 to SF12BW125
843 )))
844
845 (((
846
847 )))
848
849 (((
850 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
851 )))
852
853 (((
854 922.1 - SF7BW125 to SF12BW125
855 )))
856
857 (((
858 922.3 - SF7BW125 to SF12BW125
859 )))
860
861 (((
862 922.5 - SF7BW125 to SF12BW125
863 )))
864
865 (((
866 922.7 - SF7BW125 to SF12BW125
867 )))
868
869 (((
870 922.9 - SF7BW125 to SF12BW125
871 )))
872
873 (((
874 923.1 - SF7BW125 to SF12BW125
875 )))
876
877 (((
878 923.3 - SF7BW125 to SF12BW125
879 )))
880
881 (((
882
883 )))
884
885 (((
886 (% style="color:blue" %)**Downlink:**
887 )))
888
889 (((
890 Uplink channels 1-7(RX1)
891 )))
892
893 (((
894 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
895 )))
896
897
898
899 === 2.6.7  IN865-867 (IN865) ===
900
901 (((
902 (% style="color:blue" %)**Uplink:**
903 )))
904
905 (((
906 865.0625 - SF7BW125 to SF12BW125
907 )))
908
909 (((
910 865.4025 - SF7BW125 to SF12BW125
911 )))
912
913 (((
914 865.9850 - SF7BW125 to SF12BW125
915 )))
916
917 (((
918
919 )))
920
921 (((
922 (% style="color:blue" %)**Downlink:**
923 )))
924
925 (((
926 Uplink channels 1-3 (RX1)
927 )))
928
929 (((
930 866.550 - SF10BW125 (RX2)
931 )))
932
933
934
935 == 2.7  LED Indicator ==
936
937 The LDDS75 has an internal LED which is to show the status of different state.
938
939
940 * Blink once when device power on.
941 * The device detects the sensor and flashes 5 times.
942 * Solid ON for 5 seconds once device successful Join the network.
943 * Blink once when device transmit a packet.
944
945 == 2.8  ​Firmware Change Log ==
946
947
948 (((
949 **Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
950 )))
951
952 (((
953
954 )))
955
956 (((
957 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
958 )))
959
960
961
962 == 2.9  Mechanical ==
963
964
965 [[image:image-20220610172003-1.png]]
966
967
968 [[image:image-20220610172003-2.png]]
969
970
971
972 == 2.10  Battery Analysis ==
973
974 === 2.10.1  Battery Type ===
975
976 The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
977
978
979 The battery related documents as below:
980
981 * (((
982 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
983 )))
984 * (((
985 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
986 )))
987 * (((
988 [[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
989 )))
990
991 [[image:image-20220610172400-3.png]]
992
993
994
995 === 2.10.2  Replace the battery ===
996
997 (((
998 You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
999 )))
1000
1001 (((
1002
1003 )))
1004
1005 (((
1006 The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
1007 )))
1008
1009
1010
1011 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1012
1013 (((
1014 (((
1015 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1016 )))
1017 )))
1018
1019 * (((
1020 (((
1021 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1022 )))
1023 )))
1024 * (((
1025 (((
1026 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1027 )))
1028 )))
1029
1030 (((
1031 (((
1032
1033 )))
1034
1035 (((
1036 There are two kinds of commands to configure LDDS75, they are:
1037 )))
1038 )))
1039
1040 * (((
1041 (((
1042 (% style="color:#4f81bd" %)** General Commands**.
1043 )))
1044 )))
1045
1046 (((
1047 (((
1048 These commands are to configure:
1049 )))
1050 )))
1051
1052 * (((
1053 (((
1054 General system settings like: uplink interval.
1055 )))
1056 )))
1057 * (((
1058 (((
1059 LoRaWAN protocol & radio related command.
1060 )))
1061 )))
1062
1063 (((
1064 (((
1065 They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
1066 )))
1067 )))
1068
1069 (((
1070 (((
1071
1072 )))
1073 )))
1074
1075 * (((
1076 (((
1077 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1078 )))
1079 )))
1080
1081 (((
1082 (((
1083 These commands only valid for LDDS75, as below:
1084 )))
1085 )))
1086
1087
1088
1089 == 3.1  Access AT Commands ==
1090
1091 LDDS75 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LDDS75 for using AT command, as below.
1092
1093 [[image:image-20220610172924-4.png||height="483" width="988"]]
1094
1095
1096 Or if you have below board, use below connection:
1097
1098
1099 [[image:image-20220610172924-5.png]]
1100
1101
1102 (((
1103 In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
1104 )))
1105
1106
1107 [[image:image-20220610172924-6.png||height="601" width="860"]]
1108
1109
1110
1111 == 3.2  Set Transmit Interval Time ==
1112
1113 Feature: Change LoRaWAN End Node Transmit Interval.
1114
1115 (% style="color:#037691" %)**AT Command: AT+TDC**
1116
1117 [[image:image-20220610173409-7.png]]
1118
1119
1120 (((
1121 (% style="color:#037691" %)**Downlink Command: 0x01**
1122 )))
1123
1124 (((
1125 (((
1126 Format: Command Code (0x01) followed by 3 bytes time value.
1127
1128 (((
1129 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1130 )))
1131
1132 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1133 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1134 )))
1135 )))
1136
1137
1138
1139
1140
1141 == 3.3  Set Interrupt Mode ==
1142
1143 Feature, Set Interrupt mode for GPIO_EXIT.
1144
1145 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1146
1147 [[image:image-20220610174917-9.png]]
1148
1149
1150 (% style="color:#037691" %)**Downlink Command: 0x06**
1151
1152 Format: Command Code (0x06) followed by 3 bytes.
1153
1154 (((
1155 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1156 )))
1157
1158 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1159 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1160
1161 = 4.  FAQ =
1162
1163 == 4.1  What is the frequency plan for LDDS75? ==
1164
1165 LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
1166
1167
1168
1169 == 4.2  How to change the LoRa Frequency Bands/Region ==
1170
1171 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1172 When downloading the images, choose the required image file for download. ​
1173
1174
1175
1176 == 4.3  Can I use LDDS75 in condensation environment? ==
1177
1178 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1179
1180
1181
1182 = 5.  Trouble Shooting =
1183
1184 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1185
1186 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1187
1188
1189 == 5.2  AT Command input doesn't work ==
1190
1191 In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1192
1193 (((
1194
1195 )))
1196
1197
1198 = 6.  Order Info =
1199
1200
1201 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1202
1203
1204 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1205
1206 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1207 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1208 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1209 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1210 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1211 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1212 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1213 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1214
1215 (% style="color:blue" %)**YY**(%%): Battery Option
1216
1217 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1218 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1219
1220 = 7. ​ Packing Info =
1221
1222
1223 **Package Includes**:
1224
1225 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1226
1227 **Dimension and weight**:
1228
1229 * Device Size: cm
1230 * Device Weight: g
1231 * Package Size / pcs : cm
1232 * Weight / pcs : g
1233
1234 = 8.  ​Support =
1235
1236 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1237 * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].