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Version 169.4 by Xiaoling on 2022/06/15 09:28
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
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5
6
7 **Table of Contents:**
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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
105 == 1.3  Suitable Container & Liquid ==
106
107 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
108 * Container shape is regular, and surface is smooth.
109 * Container Thickness:
110 ** Pure metal material.  2~~8mm, best is 3~~5mm
111 ** Pure non metal material: <10 mm
112 * Pure liquid without irregular deposition.
113
114
115
116 == 1.4  Mechanical ==
117
118 [[image:image-20220615090910-1.png]]
119
120
121 [[image:image-20220615090910-2.png]]
122
123
124
125 == 1.5  Install LDDS20 ==
126
127
128 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
129
130 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
131
132 [[image:image-20220615091045-3.png]]
133
134
135
136 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
137
138 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.
139
140 [[image:image-20220615092010-11.png]]
141
142
143 No polish needed if the container is shine metal surface without paint or non-metal container.
144
145 [[image:image-20220615092044-12.png]]
146
147
148 (% style="color:blue" %)**Step3:  **(%%)Test the installation point.
149
150 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.
151
152
153 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
154
155 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
156
157
158 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.
159
160
161 (% style="color:red" %)**LED Status:**
162
163 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
164
165 * (% 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.
166 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
167
168 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
169
170
171 (% style="color:red" %)**Note 2:**
172
173 (% 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.
174
175
176 (% style="color:blue" %)**Step4:  **(%%)Install use Epoxy ab glue.
177
178 [[image:image-20220615091045-8.png]]
179
180 Prepare Eproxy AB glue.
181
182
183 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
184
185
186 Reset LDDS20 and see if the BLUE LED is slowly blinking.
187
188 [[image:image-20220615091045-9.png]]
189
190 (% style="color:red" %)Note1:
191
192 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
193
194
195 (% style="color:red" %)Note 2:
196
197 (% style="color:blue" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
198
199
200
201
202
203
204 == 1.5 ​ Applications ==
205
206 * Horizontal distance measurement
207 * Liquid level measurement
208 * Parking management system
209 * Object proximity and presence detection
210 * Intelligent trash can management system
211 * Robot obstacle avoidance
212 * Automatic control
213 * Sewer
214 * Bottom water level monitoring
215
216 == 1.6  Pin mapping and power on ==
217
218
219 [[image:1654847583902-256.png]]
220
221
222
223 = 2.  Configure LDDS75 to connect to LoRaWAN network =
224
225 == 2.1  How it works ==
226
227 (((
228 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
229 )))
230
231 (((
232 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.
233 )))
234
235
236
237 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
238
239 (((
240 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.
241 )))
242
243 (((
244 [[image:1654848616367-242.png]]
245 )))
246
247 (((
248 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.
249 )))
250
251 (((
252
253
254 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
255 )))
256
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.
259 )))
260
261 [[image:image-20220607170145-1.jpeg]]
262
263
264 (((
265 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
266 )))
267
268 (((
269 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
270 )))
271
272 (((
273
274
275 **Add APP EUI in the application**
276 )))
277
278 [[image:image-20220610161353-4.png]]
279
280 [[image:image-20220610161353-5.png]]
281
282 [[image:image-20220610161353-6.png]]
283
284
285 [[image:image-20220610161353-7.png]]
286
287
288 You can also choose to create the device manually.
289
290 [[image:image-20220610161538-8.png]]
291
292
293
294 **Add APP KEY and DEV EUI**
295
296 [[image:image-20220610161538-9.png]]
297
298
299
300 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
301
302
303 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
304
305 [[image:image-20220610161724-10.png]]
306
307
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.
310 )))
311
312 [[image:1654849068701-275.png]]
313
314
315
316 == 2.3  ​Uplink Payload ==
317
318 (((
319 (((
320 LDDS75 will uplink payload via LoRaWAN with below payload format: 
321 )))
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
326 )))
327 )))
328
329 (((
330
331 )))
332
333 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
334 |=(% style="width: 62.5px;" %)(((
335 **Size (bytes)**
336 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
337 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
338 [[Distance>>||anchor="H2.3.2A0Distance"]]
339
340 (unit: mm)
341 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
342 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
343 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
344
345 [[image:1654850511545-399.png]]
346
347
348
349 === 2.3.1  Battery Info ===
350
351
352 Check the battery voltage for LDDS75.
353
354 Ex1: 0x0B45 = 2885mV
355
356 Ex2: 0x0B49 = 2889mV
357
358
359
360 === 2.3.2  Distance ===
361
362 (((
363 Get the distance. Flat object range 280mm - 7500mm.
364 )))
365
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.**
368 )))
369
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 === 2.3.3  Interrupt Pin ===
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.
377
378 **Example:**
379
380 0x00: Normal uplink packet.
381
382 0x01: Interrupt Uplink Packet.
383
384
385
386 === 2.3.4  DS18B20 Temperature sensor ===
387
388 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
389
390 **Example**:
391
392 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
393
394 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
395
396 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
397
398
399
400 === 2.3.5  Sensor Flag ===
401
402 (((
403 0x01: Detect Ultrasonic Sensor
404 )))
405
406 (((
407 0x00: No Ultrasonic Sensor
408 )))
409
410
411
412 === 2.3.6  Decode payload in The Things Network ===
413
414 While using TTN network, you can add the payload format to decode the payload.
415
416
417 [[image:1654850829385-439.png]]
418
419 The payload decoder function for TTN V3 is here:
420
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/]]
423 )))
424
425
426
427 == 2.4  Uplink Interval ==
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"]]
430
431
432
433 == 2.5  ​Show Data in DataCake IoT Server ==
434
435 (((
436 [[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:
437 )))
438
439 (((
440
441 )))
442
443 (((
444 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
445 )))
446
447 (((
448 (% 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:**
449 )))
450
451
452 [[image:1654592790040-760.png]]
453
454
455 [[image:1654592800389-571.png]]
456
457
458 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
459
460 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
461
462 [[image:1654851029373-510.png]]
463
464
465 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
466
467 [[image:image-20220610165129-11.png||height="595" width="1088"]]
468
469
470
471 == 2.6  Frequency Plans ==
472
473 (((
474 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.
475 )))
476
477
478
479 === 2.6.1  EU863-870 (EU868) ===
480
481 (((
482 (% style="color:blue" %)**Uplink:**
483 )))
484
485 (((
486 868.1 - SF7BW125 to SF12BW125
487 )))
488
489 (((
490 868.3 - SF7BW125 to SF12BW125 and SF7BW250
491 )))
492
493 (((
494 868.5 - SF7BW125 to SF12BW125
495 )))
496
497 (((
498 867.1 - SF7BW125 to SF12BW125
499 )))
500
501 (((
502 867.3 - SF7BW125 to SF12BW125
503 )))
504
505 (((
506 867.5 - SF7BW125 to SF12BW125
507 )))
508
509 (((
510 867.7 - SF7BW125 to SF12BW125
511 )))
512
513 (((
514 867.9 - SF7BW125 to SF12BW125
515 )))
516
517 (((
518 868.8 - FSK
519 )))
520
521 (((
522
523 )))
524
525 (((
526 (% style="color:blue" %)**Downlink:**
527 )))
528
529 (((
530 Uplink channels 1-9 (RX1)
531 )))
532
533 (((
534 869.525 - SF9BW125 (RX2 downlink only)
535 )))
536
537
538
539 === 2.6.2  US902-928(US915) ===
540
541 (((
542 Used in USA, Canada and South America. Default use CHE=2
543
544 (% style="color:blue" %)**Uplink:**
545
546 903.9 - SF7BW125 to SF10BW125
547
548 904.1 - SF7BW125 to SF10BW125
549
550 904.3 - SF7BW125 to SF10BW125
551
552 904.5 - SF7BW125 to SF10BW125
553
554 904.7 - SF7BW125 to SF10BW125
555
556 904.9 - SF7BW125 to SF10BW125
557
558 905.1 - SF7BW125 to SF10BW125
559
560 905.3 - SF7BW125 to SF10BW125
561
562
563 (% style="color:blue" %)**Downlink:**
564
565 923.3 - SF7BW500 to SF12BW500
566
567 923.9 - SF7BW500 to SF12BW500
568
569 924.5 - SF7BW500 to SF12BW500
570
571 925.1 - SF7BW500 to SF12BW500
572
573 925.7 - SF7BW500 to SF12BW500
574
575 926.3 - SF7BW500 to SF12BW500
576
577 926.9 - SF7BW500 to SF12BW500
578
579 927.5 - SF7BW500 to SF12BW500
580
581 923.3 - SF12BW500(RX2 downlink only)
582
583
584
585 )))
586
587 === 2.6.3  CN470-510 (CN470) ===
588
589 (((
590 Used in China, Default use CHE=1
591 )))
592
593 (((
594 (% style="color:blue" %)**Uplink:**
595 )))
596
597 (((
598 486.3 - SF7BW125 to SF12BW125
599 )))
600
601 (((
602 486.5 - SF7BW125 to SF12BW125
603 )))
604
605 (((
606 486.7 - SF7BW125 to SF12BW125
607 )))
608
609 (((
610 486.9 - SF7BW125 to SF12BW125
611 )))
612
613 (((
614 487.1 - SF7BW125 to SF12BW125
615 )))
616
617 (((
618 487.3 - SF7BW125 to SF12BW125
619 )))
620
621 (((
622 487.5 - SF7BW125 to SF12BW125
623 )))
624
625 (((
626 487.7 - SF7BW125 to SF12BW125
627 )))
628
629 (((
630
631 )))
632
633 (((
634 (% style="color:blue" %)**Downlink:**
635 )))
636
637 (((
638 506.7 - SF7BW125 to SF12BW125
639 )))
640
641 (((
642 506.9 - SF7BW125 to SF12BW125
643 )))
644
645 (((
646 507.1 - SF7BW125 to SF12BW125
647 )))
648
649 (((
650 507.3 - SF7BW125 to SF12BW125
651 )))
652
653 (((
654 507.5 - SF7BW125 to SF12BW125
655 )))
656
657 (((
658 507.7 - SF7BW125 to SF12BW125
659 )))
660
661 (((
662 507.9 - SF7BW125 to SF12BW125
663 )))
664
665 (((
666 508.1 - SF7BW125 to SF12BW125
667 )))
668
669 (((
670 505.3 - SF12BW125 (RX2 downlink only)
671 )))
672
673
674
675 === 2.6.4  AU915-928(AU915) ===
676
677 (((
678 Default use CHE=2
679
680 (% style="color:blue" %)**Uplink:**
681
682 916.8 - SF7BW125 to SF12BW125
683
684 917.0 - SF7BW125 to SF12BW125
685
686 917.2 - SF7BW125 to SF12BW125
687
688 917.4 - SF7BW125 to SF12BW125
689
690 917.6 - SF7BW125 to SF12BW125
691
692 917.8 - SF7BW125 to SF12BW125
693
694 918.0 - SF7BW125 to SF12BW125
695
696 918.2 - SF7BW125 to SF12BW125
697
698
699 (% style="color:blue" %)**Downlink:**
700
701 923.3 - SF7BW500 to SF12BW500
702
703 923.9 - SF7BW500 to SF12BW500
704
705 924.5 - SF7BW500 to SF12BW500
706
707 925.1 - SF7BW500 to SF12BW500
708
709 925.7 - SF7BW500 to SF12BW500
710
711 926.3 - SF7BW500 to SF12BW500
712
713 926.9 - SF7BW500 to SF12BW500
714
715 927.5 - SF7BW500 to SF12BW500
716
717 923.3 - SF12BW500(RX2 downlink only)
718
719
720
721 )))
722
723 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
724
725 (((
726 (% style="color:blue" %)**Default Uplink channel:**
727 )))
728
729 (((
730 923.2 - SF7BW125 to SF10BW125
731 )))
732
733 (((
734 923.4 - SF7BW125 to SF10BW125
735 )))
736
737 (((
738
739 )))
740
741 (((
742 (% style="color:blue" %)**Additional Uplink Channel**:
743 )))
744
745 (((
746 (OTAA mode, channel added by JoinAccept message)
747 )))
748
749 (((
750
751 )))
752
753 (((
754 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
755 )))
756
757 (((
758 922.2 - SF7BW125 to SF10BW125
759 )))
760
761 (((
762 922.4 - SF7BW125 to SF10BW125
763 )))
764
765 (((
766 922.6 - SF7BW125 to SF10BW125
767 )))
768
769 (((
770 922.8 - SF7BW125 to SF10BW125
771 )))
772
773 (((
774 923.0 - SF7BW125 to SF10BW125
775 )))
776
777 (((
778 922.0 - SF7BW125 to SF10BW125
779 )))
780
781 (((
782
783 )))
784
785 (((
786 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
787 )))
788
789 (((
790 923.6 - SF7BW125 to SF10BW125
791 )))
792
793 (((
794 923.8 - SF7BW125 to SF10BW125
795 )))
796
797 (((
798 924.0 - SF7BW125 to SF10BW125
799 )))
800
801 (((
802 924.2 - SF7BW125 to SF10BW125
803 )))
804
805 (((
806 924.4 - SF7BW125 to SF10BW125
807 )))
808
809 (((
810 924.6 - SF7BW125 to SF10BW125
811 )))
812
813 (((
814
815 )))
816
817 (((
818 (% style="color:blue" %)**Downlink:**
819 )))
820
821 (((
822 Uplink channels 1-8 (RX1)
823 )))
824
825 (((
826 923.2 - SF10BW125 (RX2)
827 )))
828
829
830
831 === 2.6.6  KR920-923 (KR920) ===
832
833 (((
834 (% style="color:blue" %)**Default channel:**
835 )))
836
837 (((
838 922.1 - SF7BW125 to SF12BW125
839 )))
840
841 (((
842 922.3 - SF7BW125 to SF12BW125
843 )))
844
845 (((
846 922.5 - SF7BW125 to SF12BW125
847 )))
848
849 (((
850
851 )))
852
853 (((
854 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
855 )))
856
857 (((
858 922.1 - SF7BW125 to SF12BW125
859 )))
860
861 (((
862 922.3 - SF7BW125 to SF12BW125
863 )))
864
865 (((
866 922.5 - SF7BW125 to SF12BW125
867 )))
868
869 (((
870 922.7 - SF7BW125 to SF12BW125
871 )))
872
873 (((
874 922.9 - SF7BW125 to SF12BW125
875 )))
876
877 (((
878 923.1 - SF7BW125 to SF12BW125
879 )))
880
881 (((
882 923.3 - SF7BW125 to SF12BW125
883 )))
884
885 (((
886
887 )))
888
889 (((
890 (% style="color:blue" %)**Downlink:**
891 )))
892
893 (((
894 Uplink channels 1-7(RX1)
895 )))
896
897 (((
898 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
899 )))
900
901
902
903 === 2.6.7  IN865-867 (IN865) ===
904
905 (((
906 (% style="color:blue" %)**Uplink:**
907 )))
908
909 (((
910 865.0625 - SF7BW125 to SF12BW125
911 )))
912
913 (((
914 865.4025 - SF7BW125 to SF12BW125
915 )))
916
917 (((
918 865.9850 - SF7BW125 to SF12BW125
919 )))
920
921 (((
922
923 )))
924
925 (((
926 (% style="color:blue" %)**Downlink:**
927 )))
928
929 (((
930 Uplink channels 1-3 (RX1)
931 )))
932
933 (((
934 866.550 - SF10BW125 (RX2)
935 )))
936
937
938
939 == 2.7  LED Indicator ==
940
941 The LDDS75 has an internal LED which is to show the status of different state.
942
943
944 * Blink once when device power on.
945 * The device detects the sensor and flashes 5 times.
946 * Solid ON for 5 seconds once device successful Join the network.
947 * Blink once when device transmit a packet.
948
949 == 2.8  ​Firmware Change Log ==
950
951
952 (((
953 **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/]]
954 )))
955
956 (((
957
958 )))
959
960 (((
961 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
962 )))
963
964
965
966 == 2.9  Mechanical ==
967
968
969 [[image:image-20220610172003-1.png]]
970
971
972 [[image:image-20220610172003-2.png]]
973
974
975
976 == 2.10  Battery Analysis ==
977
978 === 2.10.1  Battery Type ===
979
980 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.
981
982
983 The battery related documents as below:
984
985 * (((
986 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
987 )))
988 * (((
989 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
990 )))
991 * (((
992 [[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]]
993 )))
994
995 [[image:image-20220610172400-3.png]]
996
997
998
999 === 2.10.2  Replace the battery ===
1000
1001 (((
1002 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.
1003 )))
1004
1005 (((
1006
1007 )))
1008
1009 (((
1010 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)
1011 )))
1012
1013
1014
1015 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1016
1017 (((
1018 (((
1019 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1020 )))
1021 )))
1022
1023 * (((
1024 (((
1025 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1026 )))
1027 )))
1028 * (((
1029 (((
1030 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1031 )))
1032 )))
1033
1034 (((
1035 (((
1036
1037 )))
1038
1039 (((
1040 There are two kinds of commands to configure LDDS75, they are:
1041 )))
1042 )))
1043
1044 * (((
1045 (((
1046 (% style="color:#4f81bd" %)** General Commands**.
1047 )))
1048 )))
1049
1050 (((
1051 (((
1052 These commands are to configure:
1053 )))
1054 )))
1055
1056 * (((
1057 (((
1058 General system settings like: uplink interval.
1059 )))
1060 )))
1061 * (((
1062 (((
1063 LoRaWAN protocol & radio related command.
1064 )))
1065 )))
1066
1067 (((
1068 (((
1069 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]]
1070 )))
1071 )))
1072
1073 (((
1074 (((
1075
1076 )))
1077 )))
1078
1079 * (((
1080 (((
1081 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1082 )))
1083 )))
1084
1085 (((
1086 (((
1087 These commands only valid for LDDS75, as below:
1088 )))
1089 )))
1090
1091
1092
1093 == 3.1  Access AT Commands ==
1094
1095 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.
1096
1097 [[image:image-20220610172924-4.png||height="483" width="988"]]
1098
1099
1100 Or if you have below board, use below connection:
1101
1102
1103 [[image:image-20220610172924-5.png]]
1104
1105
1106 (((
1107 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:
1108 )))
1109
1110
1111 [[image:image-20220610172924-6.png||height="601" width="860"]]
1112
1113
1114
1115 == 3.2  Set Transmit Interval Time ==
1116
1117 Feature: Change LoRaWAN End Node Transmit Interval.
1118
1119 (% style="color:#037691" %)**AT Command: AT+TDC**
1120
1121 [[image:image-20220610173409-7.png]]
1122
1123
1124 (((
1125 (% style="color:#037691" %)**Downlink Command: 0x01**
1126 )))
1127
1128 (((
1129 (((
1130 Format: Command Code (0x01) followed by 3 bytes time value.
1131
1132 (((
1133 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1134 )))
1135
1136 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1137 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1138 )))
1139 )))
1140
1141
1142
1143
1144
1145 == 3.3  Set Interrupt Mode ==
1146
1147 Feature, Set Interrupt mode for GPIO_EXIT.
1148
1149 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1150
1151 [[image:image-20220610174917-9.png]]
1152
1153
1154 (% style="color:#037691" %)**Downlink Command: 0x06**
1155
1156 Format: Command Code (0x06) followed by 3 bytes.
1157
1158 (((
1159 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1160 )))
1161
1162 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1163 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1164
1165 = 4.  FAQ =
1166
1167 == 4.1  What is the frequency plan for LDDS75? ==
1168
1169 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"]]
1170
1171
1172
1173 == 4.2  How to change the LoRa Frequency Bands/Region ==
1174
1175 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1176 When downloading the images, choose the required image file for download. ​
1177
1178
1179
1180 == 4.3  Can I use LDDS75 in condensation environment? ==
1181
1182 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1183
1184
1185
1186 = 5.  Trouble Shooting =
1187
1188 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1189
1190 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1191
1192
1193 == 5.2  AT Command input doesn't work ==
1194
1195 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.
1196
1197 (((
1198
1199 )))
1200
1201
1202 = 6.  Order Info =
1203
1204
1205 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1206
1207
1208 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1209
1210 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1211 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1212 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1213 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1214 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1215 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1216 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1217 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1218
1219 (% style="color:blue" %)**YY**(%%): Battery Option
1220
1221 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1222 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1223
1224 = 7. ​ Packing Info =
1225
1226
1227 **Package Includes**:
1228
1229 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1230
1231 **Dimension and weight**:
1232
1233 * Device Size: cm
1234 * Device Weight: g
1235 * Package Size / pcs : cm
1236 * Weight / pcs : g
1237
1238 = 8.  ​Support =
1239
1240 * 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.
1241 * 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]].