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Version 169.6 by Xiaoling on 2022/06/15 09:34
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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 == 1.5 ​ Applications ==
198
199 * Horizontal distance measurement
200 * Liquid level measurement
201 * Parking management system
202 * Object proximity and presence detection
203 * Intelligent trash can management system
204 * Robot obstacle avoidance
205 * Automatic control
206 * Sewer
207 * Bottom water level monitoring
208
209 == 1.6  Pin mapping and power on ==
210
211
212 [[image:1654847583902-256.png]]
213
214
215
216 = 2.  Configure LDDS75 to connect to LoRaWAN network =
217
218 == 2.1  How it works ==
219
220 (((
221 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
222 )))
223
224 (((
225 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.
226 )))
227
228
229
230 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
231
232 (((
233 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.
234 )))
235
236 (((
237 [[image:1654848616367-242.png]]
238 )))
239
240 (((
241 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.
242 )))
243
244 (((
245
246
247 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
248 )))
249
250 (((
251 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
252 )))
253
254 [[image:image-20220607170145-1.jpeg]]
255
256
257 (((
258 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
259 )))
260
261 (((
262 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
263 )))
264
265 (((
266
267
268 **Add APP EUI in the application**
269 )))
270
271 [[image:image-20220610161353-4.png]]
272
273 [[image:image-20220610161353-5.png]]
274
275 [[image:image-20220610161353-6.png]]
276
277
278 [[image:image-20220610161353-7.png]]
279
280
281 You can also choose to create the device manually.
282
283 [[image:image-20220610161538-8.png]]
284
285
286
287 **Add APP KEY and DEV EUI**
288
289 [[image:image-20220610161538-9.png]]
290
291
292
293 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
294
295
296 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
297
298 [[image:image-20220610161724-10.png]]
299
300
301 (((
302 (% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
303 )))
304
305 [[image:1654849068701-275.png]]
306
307
308
309 == 2.3  ​Uplink Payload ==
310
311 (((
312 (((
313 LDDS75 will uplink payload via LoRaWAN with below payload format: 
314 )))
315
316 (((
317 Uplink payload includes in total 4 bytes.
318 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
319 )))
320 )))
321
322 (((
323
324 )))
325
326 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
327 |=(% style="width: 62.5px;" %)(((
328 **Size (bytes)**
329 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
330 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
331 [[Distance>>||anchor="H2.3.2A0Distance"]]
332
333 (unit: mm)
334 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
335 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
336 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
337
338 [[image:1654850511545-399.png]]
339
340
341
342 === 2.3.1  Battery Info ===
343
344
345 Check the battery voltage for LDDS75.
346
347 Ex1: 0x0B45 = 2885mV
348
349 Ex2: 0x0B49 = 2889mV
350
351
352
353 === 2.3.2  Distance ===
354
355 (((
356 Get the distance. Flat object range 280mm - 7500mm.
357 )))
358
359 (((
360 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.**
361 )))
362
363
364 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
365 * 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.
366
367 === 2.3.3  Interrupt Pin ===
368
369 This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up.
370
371 **Example:**
372
373 0x00: Normal uplink packet.
374
375 0x01: Interrupt Uplink Packet.
376
377
378
379 === 2.3.4  DS18B20 Temperature sensor ===
380
381 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
382
383 **Example**:
384
385 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
386
387 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
388
389 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
390
391
392
393 === 2.3.5  Sensor Flag ===
394
395 (((
396 0x01: Detect Ultrasonic Sensor
397 )))
398
399 (((
400 0x00: No Ultrasonic Sensor
401 )))
402
403
404
405 === 2.3.6  Decode payload in The Things Network ===
406
407 While using TTN network, you can add the payload format to decode the payload.
408
409
410 [[image:1654850829385-439.png]]
411
412 The payload decoder function for TTN V3 is here:
413
414 (((
415 LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
416 )))
417
418
419
420 == 2.4  Uplink Interval ==
421
422 The LDDS75 by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]]
423
424
425
426 == 2.5  ​Show Data in DataCake IoT Server ==
427
428 (((
429 [[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:
430 )))
431
432 (((
433
434 )))
435
436 (((
437 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
438 )))
439
440 (((
441 (% 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:**
442 )))
443
444
445 [[image:1654592790040-760.png]]
446
447
448 [[image:1654592800389-571.png]]
449
450
451 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
452
453 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
454
455 [[image:1654851029373-510.png]]
456
457
458 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
459
460 [[image:image-20220610165129-11.png||height="595" width="1088"]]
461
462
463
464 == 2.6  Frequency Plans ==
465
466 (((
467 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.
468 )))
469
470
471
472 === 2.6.1  EU863-870 (EU868) ===
473
474 (((
475 (% style="color:blue" %)**Uplink:**
476 )))
477
478 (((
479 868.1 - SF7BW125 to SF12BW125
480 )))
481
482 (((
483 868.3 - SF7BW125 to SF12BW125 and SF7BW250
484 )))
485
486 (((
487 868.5 - SF7BW125 to SF12BW125
488 )))
489
490 (((
491 867.1 - SF7BW125 to SF12BW125
492 )))
493
494 (((
495 867.3 - SF7BW125 to SF12BW125
496 )))
497
498 (((
499 867.5 - SF7BW125 to SF12BW125
500 )))
501
502 (((
503 867.7 - SF7BW125 to SF12BW125
504 )))
505
506 (((
507 867.9 - SF7BW125 to SF12BW125
508 )))
509
510 (((
511 868.8 - FSK
512 )))
513
514 (((
515
516 )))
517
518 (((
519 (% style="color:blue" %)**Downlink:**
520 )))
521
522 (((
523 Uplink channels 1-9 (RX1)
524 )))
525
526 (((
527 869.525 - SF9BW125 (RX2 downlink only)
528 )))
529
530
531
532 === 2.6.2  US902-928(US915) ===
533
534 (((
535 Used in USA, Canada and South America. Default use CHE=2
536
537 (% style="color:blue" %)**Uplink:**
538
539 903.9 - SF7BW125 to SF10BW125
540
541 904.1 - SF7BW125 to SF10BW125
542
543 904.3 - SF7BW125 to SF10BW125
544
545 904.5 - SF7BW125 to SF10BW125
546
547 904.7 - SF7BW125 to SF10BW125
548
549 904.9 - SF7BW125 to SF10BW125
550
551 905.1 - SF7BW125 to SF10BW125
552
553 905.3 - SF7BW125 to SF10BW125
554
555
556 (% style="color:blue" %)**Downlink:**
557
558 923.3 - SF7BW500 to SF12BW500
559
560 923.9 - SF7BW500 to SF12BW500
561
562 924.5 - SF7BW500 to SF12BW500
563
564 925.1 - SF7BW500 to SF12BW500
565
566 925.7 - SF7BW500 to SF12BW500
567
568 926.3 - SF7BW500 to SF12BW500
569
570 926.9 - SF7BW500 to SF12BW500
571
572 927.5 - SF7BW500 to SF12BW500
573
574 923.3 - SF12BW500(RX2 downlink only)
575
576
577
578 )))
579
580 === 2.6.3  CN470-510 (CN470) ===
581
582 (((
583 Used in China, Default use CHE=1
584 )))
585
586 (((
587 (% style="color:blue" %)**Uplink:**
588 )))
589
590 (((
591 486.3 - SF7BW125 to SF12BW125
592 )))
593
594 (((
595 486.5 - SF7BW125 to SF12BW125
596 )))
597
598 (((
599 486.7 - SF7BW125 to SF12BW125
600 )))
601
602 (((
603 486.9 - SF7BW125 to SF12BW125
604 )))
605
606 (((
607 487.1 - SF7BW125 to SF12BW125
608 )))
609
610 (((
611 487.3 - SF7BW125 to SF12BW125
612 )))
613
614 (((
615 487.5 - SF7BW125 to SF12BW125
616 )))
617
618 (((
619 487.7 - SF7BW125 to SF12BW125
620 )))
621
622 (((
623
624 )))
625
626 (((
627 (% style="color:blue" %)**Downlink:**
628 )))
629
630 (((
631 506.7 - SF7BW125 to SF12BW125
632 )))
633
634 (((
635 506.9 - SF7BW125 to SF12BW125
636 )))
637
638 (((
639 507.1 - SF7BW125 to SF12BW125
640 )))
641
642 (((
643 507.3 - SF7BW125 to SF12BW125
644 )))
645
646 (((
647 507.5 - SF7BW125 to SF12BW125
648 )))
649
650 (((
651 507.7 - SF7BW125 to SF12BW125
652 )))
653
654 (((
655 507.9 - SF7BW125 to SF12BW125
656 )))
657
658 (((
659 508.1 - SF7BW125 to SF12BW125
660 )))
661
662 (((
663 505.3 - SF12BW125 (RX2 downlink only)
664 )))
665
666
667
668 === 2.6.4  AU915-928(AU915) ===
669
670 (((
671 Default use CHE=2
672
673 (% style="color:blue" %)**Uplink:**
674
675 916.8 - SF7BW125 to SF12BW125
676
677 917.0 - SF7BW125 to SF12BW125
678
679 917.2 - SF7BW125 to SF12BW125
680
681 917.4 - SF7BW125 to SF12BW125
682
683 917.6 - SF7BW125 to SF12BW125
684
685 917.8 - SF7BW125 to SF12BW125
686
687 918.0 - SF7BW125 to SF12BW125
688
689 918.2 - SF7BW125 to SF12BW125
690
691
692 (% style="color:blue" %)**Downlink:**
693
694 923.3 - SF7BW500 to SF12BW500
695
696 923.9 - SF7BW500 to SF12BW500
697
698 924.5 - SF7BW500 to SF12BW500
699
700 925.1 - SF7BW500 to SF12BW500
701
702 925.7 - SF7BW500 to SF12BW500
703
704 926.3 - SF7BW500 to SF12BW500
705
706 926.9 - SF7BW500 to SF12BW500
707
708 927.5 - SF7BW500 to SF12BW500
709
710 923.3 - SF12BW500(RX2 downlink only)
711
712
713
714 )))
715
716 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
717
718 (((
719 (% style="color:blue" %)**Default Uplink channel:**
720 )))
721
722 (((
723 923.2 - SF7BW125 to SF10BW125
724 )))
725
726 (((
727 923.4 - SF7BW125 to SF10BW125
728 )))
729
730 (((
731
732 )))
733
734 (((
735 (% style="color:blue" %)**Additional Uplink Channel**:
736 )))
737
738 (((
739 (OTAA mode, channel added by JoinAccept message)
740 )))
741
742 (((
743
744 )))
745
746 (((
747 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
748 )))
749
750 (((
751 922.2 - SF7BW125 to SF10BW125
752 )))
753
754 (((
755 922.4 - SF7BW125 to SF10BW125
756 )))
757
758 (((
759 922.6 - SF7BW125 to SF10BW125
760 )))
761
762 (((
763 922.8 - SF7BW125 to SF10BW125
764 )))
765
766 (((
767 923.0 - SF7BW125 to SF10BW125
768 )))
769
770 (((
771 922.0 - SF7BW125 to SF10BW125
772 )))
773
774 (((
775
776 )))
777
778 (((
779 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
780 )))
781
782 (((
783 923.6 - SF7BW125 to SF10BW125
784 )))
785
786 (((
787 923.8 - SF7BW125 to SF10BW125
788 )))
789
790 (((
791 924.0 - SF7BW125 to SF10BW125
792 )))
793
794 (((
795 924.2 - SF7BW125 to SF10BW125
796 )))
797
798 (((
799 924.4 - SF7BW125 to SF10BW125
800 )))
801
802 (((
803 924.6 - SF7BW125 to SF10BW125
804 )))
805
806 (((
807
808 )))
809
810 (((
811 (% style="color:blue" %)**Downlink:**
812 )))
813
814 (((
815 Uplink channels 1-8 (RX1)
816 )))
817
818 (((
819 923.2 - SF10BW125 (RX2)
820 )))
821
822
823
824 === 2.6.6  KR920-923 (KR920) ===
825
826 (((
827 (% style="color:blue" %)**Default channel:**
828 )))
829
830 (((
831 922.1 - SF7BW125 to SF12BW125
832 )))
833
834 (((
835 922.3 - SF7BW125 to SF12BW125
836 )))
837
838 (((
839 922.5 - SF7BW125 to SF12BW125
840 )))
841
842 (((
843
844 )))
845
846 (((
847 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
848 )))
849
850 (((
851 922.1 - SF7BW125 to SF12BW125
852 )))
853
854 (((
855 922.3 - SF7BW125 to SF12BW125
856 )))
857
858 (((
859 922.5 - SF7BW125 to SF12BW125
860 )))
861
862 (((
863 922.7 - SF7BW125 to SF12BW125
864 )))
865
866 (((
867 922.9 - SF7BW125 to SF12BW125
868 )))
869
870 (((
871 923.1 - SF7BW125 to SF12BW125
872 )))
873
874 (((
875 923.3 - SF7BW125 to SF12BW125
876 )))
877
878 (((
879
880 )))
881
882 (((
883 (% style="color:blue" %)**Downlink:**
884 )))
885
886 (((
887 Uplink channels 1-7(RX1)
888 )))
889
890 (((
891 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
892 )))
893
894
895
896 === 2.6.7  IN865-867 (IN865) ===
897
898 (((
899 (% style="color:blue" %)**Uplink:**
900 )))
901
902 (((
903 865.0625 - SF7BW125 to SF12BW125
904 )))
905
906 (((
907 865.4025 - SF7BW125 to SF12BW125
908 )))
909
910 (((
911 865.9850 - SF7BW125 to SF12BW125
912 )))
913
914 (((
915
916 )))
917
918 (((
919 (% style="color:blue" %)**Downlink:**
920 )))
921
922 (((
923 Uplink channels 1-3 (RX1)
924 )))
925
926 (((
927 866.550 - SF10BW125 (RX2)
928 )))
929
930
931
932 == 2.7  LED Indicator ==
933
934 The LDDS75 has an internal LED which is to show the status of different state.
935
936
937 * Blink once when device power on.
938 * The device detects the sensor and flashes 5 times.
939 * Solid ON for 5 seconds once device successful Join the network.
940 * Blink once when device transmit a packet.
941
942 == 2.8  ​Firmware Change Log ==
943
944
945 (((
946 **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/]]
947 )))
948
949 (((
950
951 )))
952
953 (((
954 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
955 )))
956
957
958
959 == 2.9  Mechanical ==
960
961
962 [[image:image-20220610172003-1.png]]
963
964
965 [[image:image-20220610172003-2.png]]
966
967
968
969 == 2.10  Battery Analysis ==
970
971 === 2.10.1  Battery Type ===
972
973 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.
974
975
976 The battery related documents as below:
977
978 * (((
979 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
980 )))
981 * (((
982 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
983 )))
984 * (((
985 [[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]]
986 )))
987
988 [[image:image-20220610172400-3.png]]
989
990
991
992 === 2.10.2  Replace the battery ===
993
994 (((
995 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.
996 )))
997
998 (((
999
1000 )))
1001
1002 (((
1003 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)
1004 )))
1005
1006
1007
1008 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1009
1010 (((
1011 (((
1012 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1013 )))
1014 )))
1015
1016 * (((
1017 (((
1018 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1019 )))
1020 )))
1021 * (((
1022 (((
1023 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1024 )))
1025 )))
1026
1027 (((
1028 (((
1029
1030 )))
1031
1032 (((
1033 There are two kinds of commands to configure LDDS75, they are:
1034 )))
1035 )))
1036
1037 * (((
1038 (((
1039 (% style="color:#4f81bd" %)** General Commands**.
1040 )))
1041 )))
1042
1043 (((
1044 (((
1045 These commands are to configure:
1046 )))
1047 )))
1048
1049 * (((
1050 (((
1051 General system settings like: uplink interval.
1052 )))
1053 )))
1054 * (((
1055 (((
1056 LoRaWAN protocol & radio related command.
1057 )))
1058 )))
1059
1060 (((
1061 (((
1062 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]]
1063 )))
1064 )))
1065
1066 (((
1067 (((
1068
1069 )))
1070 )))
1071
1072 * (((
1073 (((
1074 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1075 )))
1076 )))
1077
1078 (((
1079 (((
1080 These commands only valid for LDDS75, as below:
1081 )))
1082 )))
1083
1084
1085
1086 == 3.1  Access AT Commands ==
1087
1088 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.
1089
1090 [[image:image-20220610172924-4.png||height="483" width="988"]]
1091
1092
1093 Or if you have below board, use below connection:
1094
1095
1096 [[image:image-20220610172924-5.png]]
1097
1098
1099 (((
1100 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:
1101 )))
1102
1103
1104 [[image:image-20220610172924-6.png||height="601" width="860"]]
1105
1106
1107
1108 == 3.2  Set Transmit Interval Time ==
1109
1110 Feature: Change LoRaWAN End Node Transmit Interval.
1111
1112 (% style="color:#037691" %)**AT Command: AT+TDC**
1113
1114 [[image:image-20220610173409-7.png]]
1115
1116
1117 (((
1118 (% style="color:#037691" %)**Downlink Command: 0x01**
1119 )))
1120
1121 (((
1122 (((
1123 Format: Command Code (0x01) followed by 3 bytes time value.
1124
1125 (((
1126 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1127 )))
1128
1129 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1130 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1131 )))
1132 )))
1133
1134
1135
1136
1137
1138 == 3.3  Set Interrupt Mode ==
1139
1140 Feature, Set Interrupt mode for GPIO_EXIT.
1141
1142 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1143
1144 [[image:image-20220610174917-9.png]]
1145
1146
1147 (% style="color:#037691" %)**Downlink Command: 0x06**
1148
1149 Format: Command Code (0x06) followed by 3 bytes.
1150
1151 (((
1152 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1153 )))
1154
1155 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1156 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1157
1158 = 4.  FAQ =
1159
1160 == 4.1  What is the frequency plan for LDDS75? ==
1161
1162 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"]]
1163
1164
1165
1166 == 4.2  How to change the LoRa Frequency Bands/Region ==
1167
1168 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1169 When downloading the images, choose the required image file for download. ​
1170
1171
1172
1173 == 4.3  Can I use LDDS75 in condensation environment? ==
1174
1175 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1176
1177
1178
1179 = 5.  Trouble Shooting =
1180
1181 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1182
1183 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1184
1185
1186 == 5.2  AT Command input doesn't work ==
1187
1188 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.
1189
1190 (((
1191
1192 )))
1193
1194
1195 = 6.  Order Info =
1196
1197
1198 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1199
1200
1201 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1202
1203 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1204 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1205 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1206 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1207 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1208 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1209 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1210 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1211
1212 (% style="color:blue" %)**YY**(%%): Battery Option
1213
1214 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1215 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1216
1217 = 7. ​ Packing Info =
1218
1219
1220 **Package Includes**:
1221
1222 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1223
1224 **Dimension and weight**:
1225
1226 * Device Size: cm
1227 * Device Weight: g
1228 * Package Size / pcs : cm
1229 * Weight / pcs : g
1230
1231 = 8.  ​Support =
1232
1233 * 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.
1234 * 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]].