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Version 169.8 by Xiaoling on 2022/06/15 09:35
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
3
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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
200
201 * Smart liquid control solution.
202 * Smart liquefied gas solution.
203
204
205
206 == 1.6  Pin mapping and power on ==
207
208
209 [[image:1654847583902-256.png]]
210
211
212
213 = 2.  Configure LDDS75 to connect to LoRaWAN network =
214
215 == 2.1  How it works ==
216
217 (((
218 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
219 )))
220
221 (((
222 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.
223 )))
224
225
226
227 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
228
229 (((
230 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.
231 )))
232
233 (((
234 [[image:1654848616367-242.png]]
235 )))
236
237 (((
238 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.
239 )))
240
241 (((
242
243
244 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
245 )))
246
247 (((
248 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
249 )))
250
251 [[image:image-20220607170145-1.jpeg]]
252
253
254 (((
255 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
256 )))
257
258 (((
259 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
260 )))
261
262 (((
263
264
265 **Add APP EUI in the application**
266 )))
267
268 [[image:image-20220610161353-4.png]]
269
270 [[image:image-20220610161353-5.png]]
271
272 [[image:image-20220610161353-6.png]]
273
274
275 [[image:image-20220610161353-7.png]]
276
277
278 You can also choose to create the device manually.
279
280 [[image:image-20220610161538-8.png]]
281
282
283
284 **Add APP KEY and DEV EUI**
285
286 [[image:image-20220610161538-9.png]]
287
288
289
290 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
291
292
293 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
294
295 [[image:image-20220610161724-10.png]]
296
297
298 (((
299 (% 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.
300 )))
301
302 [[image:1654849068701-275.png]]
303
304
305
306 == 2.3  ​Uplink Payload ==
307
308 (((
309 (((
310 LDDS75 will uplink payload via LoRaWAN with below payload format: 
311 )))
312
313 (((
314 Uplink payload includes in total 4 bytes.
315 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
316 )))
317 )))
318
319 (((
320
321 )))
322
323 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
324 |=(% style="width: 62.5px;" %)(((
325 **Size (bytes)**
326 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
327 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
328 [[Distance>>||anchor="H2.3.2A0Distance"]]
329
330 (unit: mm)
331 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
332 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
333 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
334
335 [[image:1654850511545-399.png]]
336
337
338
339 === 2.3.1  Battery Info ===
340
341
342 Check the battery voltage for LDDS75.
343
344 Ex1: 0x0B45 = 2885mV
345
346 Ex2: 0x0B49 = 2889mV
347
348
349
350 === 2.3.2  Distance ===
351
352 (((
353 Get the distance. Flat object range 280mm - 7500mm.
354 )))
355
356 (((
357 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.**
358 )))
359
360
361 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
362 * 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.
363
364 === 2.3.3  Interrupt Pin ===
365
366 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
368 **Example:**
369
370 0x00: Normal uplink packet.
371
372 0x01: Interrupt Uplink Packet.
373
374
375
376 === 2.3.4  DS18B20 Temperature sensor ===
377
378 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
379
380 **Example**:
381
382 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
383
384 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
385
386 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
387
388
389
390 === 2.3.5  Sensor Flag ===
391
392 (((
393 0x01: Detect Ultrasonic Sensor
394 )))
395
396 (((
397 0x00: No Ultrasonic Sensor
398 )))
399
400
401
402 === 2.3.6  Decode payload in The Things Network ===
403
404 While using TTN network, you can add the payload format to decode the payload.
405
406
407 [[image:1654850829385-439.png]]
408
409 The payload decoder function for TTN V3 is here:
410
411 (((
412 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 )))
414
415
416
417 == 2.4  Uplink Interval ==
418
419 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
421
422
423 == 2.5  ​Show Data in DataCake IoT Server ==
424
425 (((
426 [[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:
427 )))
428
429 (((
430
431 )))
432
433 (((
434 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
435 )))
436
437 (((
438 (% 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:**
439 )))
440
441
442 [[image:1654592790040-760.png]]
443
444
445 [[image:1654592800389-571.png]]
446
447
448 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
449
450 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
451
452 [[image:1654851029373-510.png]]
453
454
455 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
456
457 [[image:image-20220610165129-11.png||height="595" width="1088"]]
458
459
460
461 == 2.6  Frequency Plans ==
462
463 (((
464 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.
465 )))
466
467
468
469 === 2.6.1  EU863-870 (EU868) ===
470
471 (((
472 (% style="color:blue" %)**Uplink:**
473 )))
474
475 (((
476 868.1 - SF7BW125 to SF12BW125
477 )))
478
479 (((
480 868.3 - SF7BW125 to SF12BW125 and SF7BW250
481 )))
482
483 (((
484 868.5 - SF7BW125 to SF12BW125
485 )))
486
487 (((
488 867.1 - SF7BW125 to SF12BW125
489 )))
490
491 (((
492 867.3 - SF7BW125 to SF12BW125
493 )))
494
495 (((
496 867.5 - SF7BW125 to SF12BW125
497 )))
498
499 (((
500 867.7 - SF7BW125 to SF12BW125
501 )))
502
503 (((
504 867.9 - SF7BW125 to SF12BW125
505 )))
506
507 (((
508 868.8 - FSK
509 )))
510
511 (((
512
513 )))
514
515 (((
516 (% style="color:blue" %)**Downlink:**
517 )))
518
519 (((
520 Uplink channels 1-9 (RX1)
521 )))
522
523 (((
524 869.525 - SF9BW125 (RX2 downlink only)
525 )))
526
527
528
529 === 2.6.2  US902-928(US915) ===
530
531 (((
532 Used in USA, Canada and South America. Default use CHE=2
533
534 (% style="color:blue" %)**Uplink:**
535
536 903.9 - SF7BW125 to SF10BW125
537
538 904.1 - SF7BW125 to SF10BW125
539
540 904.3 - SF7BW125 to SF10BW125
541
542 904.5 - SF7BW125 to SF10BW125
543
544 904.7 - SF7BW125 to SF10BW125
545
546 904.9 - SF7BW125 to SF10BW125
547
548 905.1 - SF7BW125 to SF10BW125
549
550 905.3 - SF7BW125 to SF10BW125
551
552
553 (% style="color:blue" %)**Downlink:**
554
555 923.3 - SF7BW500 to SF12BW500
556
557 923.9 - SF7BW500 to SF12BW500
558
559 924.5 - SF7BW500 to SF12BW500
560
561 925.1 - SF7BW500 to SF12BW500
562
563 925.7 - SF7BW500 to SF12BW500
564
565 926.3 - SF7BW500 to SF12BW500
566
567 926.9 - SF7BW500 to SF12BW500
568
569 927.5 - SF7BW500 to SF12BW500
570
571 923.3 - SF12BW500(RX2 downlink only)
572
573
574
575 )))
576
577 === 2.6.3  CN470-510 (CN470) ===
578
579 (((
580 Used in China, Default use CHE=1
581 )))
582
583 (((
584 (% style="color:blue" %)**Uplink:**
585 )))
586
587 (((
588 486.3 - SF7BW125 to SF12BW125
589 )))
590
591 (((
592 486.5 - SF7BW125 to SF12BW125
593 )))
594
595 (((
596 486.7 - SF7BW125 to SF12BW125
597 )))
598
599 (((
600 486.9 - SF7BW125 to SF12BW125
601 )))
602
603 (((
604 487.1 - SF7BW125 to SF12BW125
605 )))
606
607 (((
608 487.3 - SF7BW125 to SF12BW125
609 )))
610
611 (((
612 487.5 - SF7BW125 to SF12BW125
613 )))
614
615 (((
616 487.7 - SF7BW125 to SF12BW125
617 )))
618
619 (((
620
621 )))
622
623 (((
624 (% style="color:blue" %)**Downlink:**
625 )))
626
627 (((
628 506.7 - SF7BW125 to SF12BW125
629 )))
630
631 (((
632 506.9 - SF7BW125 to SF12BW125
633 )))
634
635 (((
636 507.1 - SF7BW125 to SF12BW125
637 )))
638
639 (((
640 507.3 - SF7BW125 to SF12BW125
641 )))
642
643 (((
644 507.5 - SF7BW125 to SF12BW125
645 )))
646
647 (((
648 507.7 - SF7BW125 to SF12BW125
649 )))
650
651 (((
652 507.9 - SF7BW125 to SF12BW125
653 )))
654
655 (((
656 508.1 - SF7BW125 to SF12BW125
657 )))
658
659 (((
660 505.3 - SF12BW125 (RX2 downlink only)
661 )))
662
663
664
665 === 2.6.4  AU915-928(AU915) ===
666
667 (((
668 Default use CHE=2
669
670 (% style="color:blue" %)**Uplink:**
671
672 916.8 - SF7BW125 to SF12BW125
673
674 917.0 - SF7BW125 to SF12BW125
675
676 917.2 - SF7BW125 to SF12BW125
677
678 917.4 - SF7BW125 to SF12BW125
679
680 917.6 - SF7BW125 to SF12BW125
681
682 917.8 - SF7BW125 to SF12BW125
683
684 918.0 - SF7BW125 to SF12BW125
685
686 918.2 - SF7BW125 to SF12BW125
687
688
689 (% style="color:blue" %)**Downlink:**
690
691 923.3 - SF7BW500 to SF12BW500
692
693 923.9 - SF7BW500 to SF12BW500
694
695 924.5 - SF7BW500 to SF12BW500
696
697 925.1 - SF7BW500 to SF12BW500
698
699 925.7 - SF7BW500 to SF12BW500
700
701 926.3 - SF7BW500 to SF12BW500
702
703 926.9 - SF7BW500 to SF12BW500
704
705 927.5 - SF7BW500 to SF12BW500
706
707 923.3 - SF12BW500(RX2 downlink only)
708
709
710
711 )))
712
713 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
714
715 (((
716 (% style="color:blue" %)**Default Uplink channel:**
717 )))
718
719 (((
720 923.2 - SF7BW125 to SF10BW125
721 )))
722
723 (((
724 923.4 - SF7BW125 to SF10BW125
725 )))
726
727 (((
728
729 )))
730
731 (((
732 (% style="color:blue" %)**Additional Uplink Channel**:
733 )))
734
735 (((
736 (OTAA mode, channel added by JoinAccept message)
737 )))
738
739 (((
740
741 )))
742
743 (((
744 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
745 )))
746
747 (((
748 922.2 - SF7BW125 to SF10BW125
749 )))
750
751 (((
752 922.4 - SF7BW125 to SF10BW125
753 )))
754
755 (((
756 922.6 - SF7BW125 to SF10BW125
757 )))
758
759 (((
760 922.8 - SF7BW125 to SF10BW125
761 )))
762
763 (((
764 923.0 - SF7BW125 to SF10BW125
765 )))
766
767 (((
768 922.0 - SF7BW125 to SF10BW125
769 )))
770
771 (((
772
773 )))
774
775 (((
776 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
777 )))
778
779 (((
780 923.6 - SF7BW125 to SF10BW125
781 )))
782
783 (((
784 923.8 - SF7BW125 to SF10BW125
785 )))
786
787 (((
788 924.0 - SF7BW125 to SF10BW125
789 )))
790
791 (((
792 924.2 - SF7BW125 to SF10BW125
793 )))
794
795 (((
796 924.4 - SF7BW125 to SF10BW125
797 )))
798
799 (((
800 924.6 - SF7BW125 to SF10BW125
801 )))
802
803 (((
804
805 )))
806
807 (((
808 (% style="color:blue" %)**Downlink:**
809 )))
810
811 (((
812 Uplink channels 1-8 (RX1)
813 )))
814
815 (((
816 923.2 - SF10BW125 (RX2)
817 )))
818
819
820
821 === 2.6.6  KR920-923 (KR920) ===
822
823 (((
824 (% style="color:blue" %)**Default channel:**
825 )))
826
827 (((
828 922.1 - SF7BW125 to SF12BW125
829 )))
830
831 (((
832 922.3 - SF7BW125 to SF12BW125
833 )))
834
835 (((
836 922.5 - SF7BW125 to SF12BW125
837 )))
838
839 (((
840
841 )))
842
843 (((
844 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
845 )))
846
847 (((
848 922.1 - SF7BW125 to SF12BW125
849 )))
850
851 (((
852 922.3 - SF7BW125 to SF12BW125
853 )))
854
855 (((
856 922.5 - SF7BW125 to SF12BW125
857 )))
858
859 (((
860 922.7 - SF7BW125 to SF12BW125
861 )))
862
863 (((
864 922.9 - SF7BW125 to SF12BW125
865 )))
866
867 (((
868 923.1 - SF7BW125 to SF12BW125
869 )))
870
871 (((
872 923.3 - SF7BW125 to SF12BW125
873 )))
874
875 (((
876
877 )))
878
879 (((
880 (% style="color:blue" %)**Downlink:**
881 )))
882
883 (((
884 Uplink channels 1-7(RX1)
885 )))
886
887 (((
888 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
889 )))
890
891
892
893 === 2.6.7  IN865-867 (IN865) ===
894
895 (((
896 (% style="color:blue" %)**Uplink:**
897 )))
898
899 (((
900 865.0625 - SF7BW125 to SF12BW125
901 )))
902
903 (((
904 865.4025 - SF7BW125 to SF12BW125
905 )))
906
907 (((
908 865.9850 - SF7BW125 to SF12BW125
909 )))
910
911 (((
912
913 )))
914
915 (((
916 (% style="color:blue" %)**Downlink:**
917 )))
918
919 (((
920 Uplink channels 1-3 (RX1)
921 )))
922
923 (((
924 866.550 - SF10BW125 (RX2)
925 )))
926
927
928
929 == 2.7  LED Indicator ==
930
931 The LDDS75 has an internal LED which is to show the status of different state.
932
933
934 * Blink once when device power on.
935 * The device detects the sensor and flashes 5 times.
936 * Solid ON for 5 seconds once device successful Join the network.
937 * Blink once when device transmit a packet.
938
939 == 2.8  ​Firmware Change Log ==
940
941
942 (((
943 **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/]]
944 )))
945
946 (((
947
948 )))
949
950 (((
951 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
952 )))
953
954
955
956 == 2.9  Mechanical ==
957
958
959 [[image:image-20220610172003-1.png]]
960
961
962 [[image:image-20220610172003-2.png]]
963
964
965
966 == 2.10  Battery Analysis ==
967
968 === 2.10.1  Battery Type ===
969
970 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.
971
972
973 The battery related documents as below:
974
975 * (((
976 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
977 )))
978 * (((
979 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
980 )))
981 * (((
982 [[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]]
983 )))
984
985 [[image:image-20220610172400-3.png]]
986
987
988
989 === 2.10.2  Replace the battery ===
990
991 (((
992 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.
993 )))
994
995 (((
996
997 )))
998
999 (((
1000 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)
1001 )))
1002
1003
1004
1005 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1006
1007 (((
1008 (((
1009 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1010 )))
1011 )))
1012
1013 * (((
1014 (((
1015 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1016 )))
1017 )))
1018 * (((
1019 (((
1020 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1021 )))
1022 )))
1023
1024 (((
1025 (((
1026
1027 )))
1028
1029 (((
1030 There are two kinds of commands to configure LDDS75, they are:
1031 )))
1032 )))
1033
1034 * (((
1035 (((
1036 (% style="color:#4f81bd" %)** General Commands**.
1037 )))
1038 )))
1039
1040 (((
1041 (((
1042 These commands are to configure:
1043 )))
1044 )))
1045
1046 * (((
1047 (((
1048 General system settings like: uplink interval.
1049 )))
1050 )))
1051 * (((
1052 (((
1053 LoRaWAN protocol & radio related command.
1054 )))
1055 )))
1056
1057 (((
1058 (((
1059 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]]
1060 )))
1061 )))
1062
1063 (((
1064 (((
1065
1066 )))
1067 )))
1068
1069 * (((
1070 (((
1071 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1072 )))
1073 )))
1074
1075 (((
1076 (((
1077 These commands only valid for LDDS75, as below:
1078 )))
1079 )))
1080
1081
1082
1083 == 3.1  Access AT Commands ==
1084
1085 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.
1086
1087 [[image:image-20220610172924-4.png||height="483" width="988"]]
1088
1089
1090 Or if you have below board, use below connection:
1091
1092
1093 [[image:image-20220610172924-5.png]]
1094
1095
1096 (((
1097 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:
1098 )))
1099
1100
1101 [[image:image-20220610172924-6.png||height="601" width="860"]]
1102
1103
1104
1105 == 3.2  Set Transmit Interval Time ==
1106
1107 Feature: Change LoRaWAN End Node Transmit Interval.
1108
1109 (% style="color:#037691" %)**AT Command: AT+TDC**
1110
1111 [[image:image-20220610173409-7.png]]
1112
1113
1114 (((
1115 (% style="color:#037691" %)**Downlink Command: 0x01**
1116 )))
1117
1118 (((
1119 (((
1120 Format: Command Code (0x01) followed by 3 bytes time value.
1121
1122 (((
1123 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1124 )))
1125
1126 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1127 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1128 )))
1129 )))
1130
1131
1132
1133
1134
1135 == 3.3  Set Interrupt Mode ==
1136
1137 Feature, Set Interrupt mode for GPIO_EXIT.
1138
1139 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1140
1141 [[image:image-20220610174917-9.png]]
1142
1143
1144 (% style="color:#037691" %)**Downlink Command: 0x06**
1145
1146 Format: Command Code (0x06) followed by 3 bytes.
1147
1148 (((
1149 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1150 )))
1151
1152 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1153 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1154
1155 = 4.  FAQ =
1156
1157 == 4.1  What is the frequency plan for LDDS75? ==
1158
1159 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"]]
1160
1161
1162
1163 == 4.2  How to change the LoRa Frequency Bands/Region ==
1164
1165 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1166 When downloading the images, choose the required image file for download. ​
1167
1168
1169
1170 == 4.3  Can I use LDDS75 in condensation environment? ==
1171
1172 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1173
1174
1175
1176 = 5.  Trouble Shooting =
1177
1178 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1179
1180 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1181
1182
1183 == 5.2  AT Command input doesn't work ==
1184
1185 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.
1186
1187 (((
1188
1189 )))
1190
1191
1192 = 6.  Order Info =
1193
1194
1195 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1196
1197
1198 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1199
1200 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1201 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1202 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1203 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1204 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1205 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1206 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1207 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1208
1209 (% style="color:blue" %)**YY**(%%): Battery Option
1210
1211 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1212 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1213
1214 = 7. ​ Packing Info =
1215
1216
1217 **Package Includes**:
1218
1219 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1220
1221 **Dimension and weight**:
1222
1223 * Device Size: cm
1224 * Device Weight: g
1225 * Package Size / pcs : cm
1226 * Weight / pcs : g
1227
1228 = 8.  ​Support =
1229
1230 * 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.
1231 * 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]].