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Version 173.3 by Xiaoling on 2022/06/15 10:11
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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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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 == 1.3  Suitable Container & Liquid ==
104
105 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
106 * Container shape is regular, and surface is smooth.
107 * Container Thickness:
108 ** Pure metal material.  2~~8mm, best is 3~~5mm
109 ** Pure non metal material: <10 mm
110 * Pure liquid without irregular deposition.
111
112 == 1.4  Mechanical ==
113
114 [[image:image-20220615090910-1.png]]
115
116
117 [[image:image-20220615090910-2.png]]
118
119
120
121 == 1.5  Install LDDS20 ==
122
123
124 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
125
126 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
127
128 [[image:image-20220615091045-3.png]]
129
130
131
132 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
133
134 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.
135
136 [[image:image-20220615092010-11.png]]
137
138
139 No polish needed if the container is shine metal surface without paint or non-metal container.
140
141 [[image:image-20220615092044-12.png]]
142
143
144
145 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
146
147 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.
148
149
150 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
151
152 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
153
154
155 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.
156
157
158 (% style="color:red" %)**LED Status:**
159
160 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
161
162 * (% 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.
163 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
164
165 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
166
167
168 (% style="color:red" %)**Note 2:**
169
170 (% 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.
171
172
173
174 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175
176 Prepare Eproxy AB glue.
177
178 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
179
180 Reset LDDS20 and see if the BLUE LED is slowly blinking.
181
182 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
183
184
185 (% style="color:red" %)**Note 1:**
186
187 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
188
189
190 (% style="color:red" %)**Note 2:**
191
192 (% 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.
193
194
195
196 == 1.6 ​ Applications ==
197
198 * Smart liquid control solution.
199 * Smart liquefied gas solution.
200
201
202 == 1.7  Precautions ==
203
204 * At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
205 * For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
206 * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
207
208
209 == 1.8  Pin mapping and power on ==
210
211
212 [[image:1655257026882-201.png]]
213
214
215
216 = 2.  Configure LDDS20 to connect to LoRaWAN network =
217
218
219 == 2.1  How it works ==
220
221 (((
222 The LDDS20 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
223 )))
224
225 (((
226 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.A0UsingtheATCommands"]]to set the keys in the LDDS20.
227 )))
228
229
230
231 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
232
233 (((
234 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.
235 )))
236
237 (((
238 [[image:1655257698953-697.png]]
239 )))
240
241 (((
242 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.
243 )))
244
245 (((
246
247
248 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
249 )))
250
251 (((
252 Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
253 )))
254
255 [[image:image-20220607170145-1.jpeg]]
256
257
258 (((
259 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
260 )))
261
262 (((
263 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
264 )))
265
266 (((
267
268
269 **Add APP EUI in the application**
270 )))
271
272 [[image:image-20220610161353-4.png]]
273
274 [[image:image-20220610161353-5.png]]
275
276 [[image:image-20220610161353-6.png]]
277
278
279 [[image:image-20220610161353-7.png]]
280
281
282
283 You can also choose to create the device manually.
284
285 [[image:image-20220610161538-8.png]]
286
287
288
289 **Add APP KEY and DEV EUI**
290
291 [[image:image-20220610161538-9.png]]
292
293
294
295 (% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
296
297
298 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
299
300 [[image:image-20220615095102-14.png]]
301
302
303
304 (((
305 (% style="color:blue" %)**Step 3**(%%)**:**  The LDDS20 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
306 )))
307
308 [[image:1654849068701-275.png]]
309
310
311
312 == 2.3  ​Uplink Payload ==
313
314 (((
315 (((
316 LDDS20 will uplink payload via LoRaWAN with below payload format: 
317
318 Uplink payload includes in total 8 bytes.
319 Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
320 )))
321 )))
322
323 (((
324
325 )))
326
327 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
328 |=(% style="width: 62.5px;" %)(((
329 **Size (bytes)**
330 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
331 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
332 [[Distance>>||anchor="H2.3.2A0Distance"]]
333
334 (unit: mm)
335 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
336 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
337 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
338
339 [[image:1654850511545-399.png]]
340
341
342
343 === 2.3.1  Battery Info ===
344
345
346 Check the battery voltage for LDDS20.
347
348 Ex1: 0x0B45 = 2885mV
349
350 Ex2: 0x0B49 = 2889mV
351
352
353
354 === 2.3.2  Distance ===
355
356 (((
357 Get the distance. Flat object range 20mm - 2000mm.
358 )))
359
360 (((
361 For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
362 )))
363
364 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
365 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
366
367
368 === 2.3.3  Interrupt Pin ===
369
370 This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
371
372 **Example:**
373
374 0x00: Normal uplink packet.
375
376 0x01: Interrupt Uplink Packet.
377
378
379
380 === 2.3.4  DS18B20 Temperature sensor ===
381
382 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
383
384 **Example**:
385
386 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
387
388 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
389
390 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
391
392
393
394 === 2.3.5  Sensor Flag ===
395
396 (((
397 0x01: Detect Ultrasonic Sensor
398 )))
399
400 (((
401 0x00: No Ultrasonic Sensor
402 )))
403
404
405
406 === 2.3.6  Decode payload in The Things Network ===
407
408 While using TTN network, you can add the payload format to decode the payload.
409
410
411 [[image:1654850829385-439.png]]
412
413 The payload decoder function for TTN V3 is here:
414
415 (((
416 LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
417 )))
418
419
420
421 == 2.4  Downlink Payload ==
422
423 By default, LDDS20 prints the downlink payload to console port.
424
425 [[image:image-20220615100930-15.png]]
426
427
428 **Examples:**
429
430
431 * (% style="color:blue" %)**Set TDC**
432
433 If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
434
435 Payload:    01 00 00 1E    TDC=30S
436
437 Payload:    01 00 00 3C    TDC=60S
438
439
440 * (% style="color:blue" %)**Reset**
441
442 If payload = 0x04FF, it will reset the LDDS20
443
444
445 * (% style="color:blue" %)**CFM**
446
447 Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
448
449
450
451 == 2.5  ​Show Data in DataCake IoT Server ==
452
453 (((
454 [[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:
455 )))
456
457 (((
458
459 )))
460
461 (((
462 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
463 )))
464
465 (((
466 (% 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:**
467 )))
468
469
470 [[image:1654592790040-760.png]]
471
472
473 [[image:1654592800389-571.png]]
474
475
476 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
477
478 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
479
480 [[image:1654851029373-510.png]]
481
482
483 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
484
485 [[image:image-20220610165129-11.png||height="595" width="1088"]]
486
487
488
489 == 2.6  Frequency Plans ==
490
491 (((
492 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.
493 )))
494
495
496
497 === 2.6.1  EU863-870 (EU868) ===
498
499 (((
500 (% style="color:blue" %)**Uplink:**
501 )))
502
503 (((
504 868.1 - SF7BW125 to SF12BW125
505 )))
506
507 (((
508 868.3 - SF7BW125 to SF12BW125 and SF7BW250
509 )))
510
511 (((
512 868.5 - SF7BW125 to SF12BW125
513 )))
514
515 (((
516 867.1 - SF7BW125 to SF12BW125
517 )))
518
519 (((
520 867.3 - SF7BW125 to SF12BW125
521 )))
522
523 (((
524 867.5 - SF7BW125 to SF12BW125
525 )))
526
527 (((
528 867.7 - SF7BW125 to SF12BW125
529 )))
530
531 (((
532 867.9 - SF7BW125 to SF12BW125
533 )))
534
535 (((
536 868.8 - FSK
537 )))
538
539 (((
540
541 )))
542
543 (((
544 (% style="color:blue" %)**Downlink:**
545 )))
546
547 (((
548 Uplink channels 1-9 (RX1)
549 )))
550
551 (((
552 869.525 - SF9BW125 (RX2 downlink only)
553 )))
554
555
556
557 === 2.6.2  US902-928(US915) ===
558
559 (((
560 Used in USA, Canada and South America. Default use CHE=2
561
562 (% style="color:blue" %)**Uplink:**
563
564 903.9 - SF7BW125 to SF10BW125
565
566 904.1 - SF7BW125 to SF10BW125
567
568 904.3 - SF7BW125 to SF10BW125
569
570 904.5 - SF7BW125 to SF10BW125
571
572 904.7 - SF7BW125 to SF10BW125
573
574 904.9 - SF7BW125 to SF10BW125
575
576 905.1 - SF7BW125 to SF10BW125
577
578 905.3 - SF7BW125 to SF10BW125
579
580
581 (% style="color:blue" %)**Downlink:**
582
583 923.3 - SF7BW500 to SF12BW500
584
585 923.9 - SF7BW500 to SF12BW500
586
587 924.5 - SF7BW500 to SF12BW500
588
589 925.1 - SF7BW500 to SF12BW500
590
591 925.7 - SF7BW500 to SF12BW500
592
593 926.3 - SF7BW500 to SF12BW500
594
595 926.9 - SF7BW500 to SF12BW500
596
597 927.5 - SF7BW500 to SF12BW500
598
599 923.3 - SF12BW500(RX2 downlink only)
600
601
602
603 )))
604
605 === 2.6.3  CN470-510 (CN470) ===
606
607 (((
608 Used in China, Default use CHE=1
609 )))
610
611 (((
612 (% style="color:blue" %)**Uplink:**
613 )))
614
615 (((
616 486.3 - SF7BW125 to SF12BW125
617 )))
618
619 (((
620 486.5 - SF7BW125 to SF12BW125
621 )))
622
623 (((
624 486.7 - SF7BW125 to SF12BW125
625 )))
626
627 (((
628 486.9 - SF7BW125 to SF12BW125
629 )))
630
631 (((
632 487.1 - SF7BW125 to SF12BW125
633 )))
634
635 (((
636 487.3 - SF7BW125 to SF12BW125
637 )))
638
639 (((
640 487.5 - SF7BW125 to SF12BW125
641 )))
642
643 (((
644 487.7 - SF7BW125 to SF12BW125
645 )))
646
647 (((
648
649 )))
650
651 (((
652 (% style="color:blue" %)**Downlink:**
653 )))
654
655 (((
656 506.7 - SF7BW125 to SF12BW125
657 )))
658
659 (((
660 506.9 - SF7BW125 to SF12BW125
661 )))
662
663 (((
664 507.1 - SF7BW125 to SF12BW125
665 )))
666
667 (((
668 507.3 - SF7BW125 to SF12BW125
669 )))
670
671 (((
672 507.5 - SF7BW125 to SF12BW125
673 )))
674
675 (((
676 507.7 - SF7BW125 to SF12BW125
677 )))
678
679 (((
680 507.9 - SF7BW125 to SF12BW125
681 )))
682
683 (((
684 508.1 - SF7BW125 to SF12BW125
685 )))
686
687 (((
688 505.3 - SF12BW125 (RX2 downlink only)
689 )))
690
691
692
693 === 2.6.4  AU915-928(AU915) ===
694
695 (((
696 Default use CHE=2
697
698 (% style="color:blue" %)**Uplink:**
699
700 916.8 - SF7BW125 to SF12BW125
701
702 917.0 - SF7BW125 to SF12BW125
703
704 917.2 - SF7BW125 to SF12BW125
705
706 917.4 - SF7BW125 to SF12BW125
707
708 917.6 - SF7BW125 to SF12BW125
709
710 917.8 - SF7BW125 to SF12BW125
711
712 918.0 - SF7BW125 to SF12BW125
713
714 918.2 - SF7BW125 to SF12BW125
715
716
717 (% style="color:blue" %)**Downlink:**
718
719 923.3 - SF7BW500 to SF12BW500
720
721 923.9 - SF7BW500 to SF12BW500
722
723 924.5 - SF7BW500 to SF12BW500
724
725 925.1 - SF7BW500 to SF12BW500
726
727 925.7 - SF7BW500 to SF12BW500
728
729 926.3 - SF7BW500 to SF12BW500
730
731 926.9 - SF7BW500 to SF12BW500
732
733 927.5 - SF7BW500 to SF12BW500
734
735 923.3 - SF12BW500(RX2 downlink only)
736
737
738
739 )))
740
741 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
742
743 (((
744 (% style="color:blue" %)**Default Uplink channel:**
745 )))
746
747 (((
748 923.2 - SF7BW125 to SF10BW125
749 )))
750
751 (((
752 923.4 - SF7BW125 to SF10BW125
753 )))
754
755 (((
756
757 )))
758
759 (((
760 (% style="color:blue" %)**Additional Uplink Channel**:
761 )))
762
763 (((
764 (OTAA mode, channel added by JoinAccept message)
765 )))
766
767 (((
768
769 )))
770
771 (((
772 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
773 )))
774
775 (((
776 922.2 - SF7BW125 to SF10BW125
777 )))
778
779 (((
780 922.4 - SF7BW125 to SF10BW125
781 )))
782
783 (((
784 922.6 - SF7BW125 to SF10BW125
785 )))
786
787 (((
788 922.8 - SF7BW125 to SF10BW125
789 )))
790
791 (((
792 923.0 - SF7BW125 to SF10BW125
793 )))
794
795 (((
796 922.0 - SF7BW125 to SF10BW125
797 )))
798
799 (((
800
801 )))
802
803 (((
804 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
805 )))
806
807 (((
808 923.6 - SF7BW125 to SF10BW125
809 )))
810
811 (((
812 923.8 - SF7BW125 to SF10BW125
813 )))
814
815 (((
816 924.0 - SF7BW125 to SF10BW125
817 )))
818
819 (((
820 924.2 - SF7BW125 to SF10BW125
821 )))
822
823 (((
824 924.4 - SF7BW125 to SF10BW125
825 )))
826
827 (((
828 924.6 - SF7BW125 to SF10BW125
829 )))
830
831 (((
832
833 )))
834
835 (((
836 (% style="color:blue" %)**Downlink:**
837 )))
838
839 (((
840 Uplink channels 1-8 (RX1)
841 )))
842
843 (((
844 923.2 - SF10BW125 (RX2)
845 )))
846
847
848
849 === 2.6.6  KR920-923 (KR920) ===
850
851 (((
852 (% style="color:blue" %)**Default channel:**
853 )))
854
855 (((
856 922.1 - SF7BW125 to SF12BW125
857 )))
858
859 (((
860 922.3 - SF7BW125 to SF12BW125
861 )))
862
863 (((
864 922.5 - SF7BW125 to SF12BW125
865 )))
866
867 (((
868
869 )))
870
871 (((
872 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
873 )))
874
875 (((
876 922.1 - SF7BW125 to SF12BW125
877 )))
878
879 (((
880 922.3 - SF7BW125 to SF12BW125
881 )))
882
883 (((
884 922.5 - SF7BW125 to SF12BW125
885 )))
886
887 (((
888 922.7 - SF7BW125 to SF12BW125
889 )))
890
891 (((
892 922.9 - SF7BW125 to SF12BW125
893 )))
894
895 (((
896 923.1 - SF7BW125 to SF12BW125
897 )))
898
899 (((
900 923.3 - SF7BW125 to SF12BW125
901 )))
902
903 (((
904
905 )))
906
907 (((
908 (% style="color:blue" %)**Downlink:**
909 )))
910
911 (((
912 Uplink channels 1-7(RX1)
913 )))
914
915 (((
916 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
917 )))
918
919
920
921 === 2.6.7  IN865-867 (IN865) ===
922
923 (((
924 (% style="color:blue" %)**Uplink:**
925 )))
926
927 (((
928 865.0625 - SF7BW125 to SF12BW125
929 )))
930
931 (((
932 865.4025 - SF7BW125 to SF12BW125
933 )))
934
935 (((
936 865.9850 - SF7BW125 to SF12BW125
937 )))
938
939 (((
940
941 )))
942
943 (((
944 (% style="color:blue" %)**Downlink:**
945 )))
946
947 (((
948 Uplink channels 1-3 (RX1)
949 )))
950
951 (((
952 866.550 - SF10BW125 (RX2)
953 )))
954
955
956
957 == 2.7  LED Indicator ==
958
959 The LDDS75 has an internal LED which is to show the status of different state.
960
961
962 * Blink once when device power on.
963 * The device detects the sensor and flashes 5 times.
964 * Solid ON for 5 seconds once device successful Join the network.
965 * Blink once when device transmit a packet.
966
967 == 2.8  ​Firmware Change Log ==
968
969
970 (((
971 **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/]]
972 )))
973
974 (((
975
976 )))
977
978 (((
979 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
980 )))
981
982
983
984 == 2.9  Mechanical ==
985
986
987 [[image:image-20220610172003-1.png]]
988
989
990 [[image:image-20220610172003-2.png]]
991
992
993
994 == 2.10  Battery Analysis ==
995
996 === 2.10.1  Battery Type ===
997
998 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.
999
1000
1001 The battery related documents as below:
1002
1003 * (((
1004 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1005 )))
1006 * (((
1007 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1008 )))
1009 * (((
1010 [[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]]
1011 )))
1012
1013 [[image:image-20220610172400-3.png]]
1014
1015
1016
1017 === 2.10.2  Replace the battery ===
1018
1019 (((
1020 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.
1021 )))
1022
1023 (((
1024
1025 )))
1026
1027 (((
1028 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)
1029 )))
1030
1031
1032
1033 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1034
1035 (((
1036 (((
1037 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1038 )))
1039 )))
1040
1041 * (((
1042 (((
1043 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1044 )))
1045 )))
1046 * (((
1047 (((
1048 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1049 )))
1050 )))
1051
1052 (((
1053 (((
1054
1055 )))
1056
1057 (((
1058 There are two kinds of commands to configure LDDS75, they are:
1059 )))
1060 )))
1061
1062 * (((
1063 (((
1064 (% style="color:#4f81bd" %)** General Commands**.
1065 )))
1066 )))
1067
1068 (((
1069 (((
1070 These commands are to configure:
1071 )))
1072 )))
1073
1074 * (((
1075 (((
1076 General system settings like: uplink interval.
1077 )))
1078 )))
1079 * (((
1080 (((
1081 LoRaWAN protocol & radio related command.
1082 )))
1083 )))
1084
1085 (((
1086 (((
1087 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]]
1088 )))
1089 )))
1090
1091 (((
1092 (((
1093
1094 )))
1095 )))
1096
1097 * (((
1098 (((
1099 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1100 )))
1101 )))
1102
1103 (((
1104 (((
1105 These commands only valid for LDDS75, as below:
1106 )))
1107 )))
1108
1109
1110
1111 == 3.1  Access AT Commands ==
1112
1113 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.
1114
1115 [[image:image-20220610172924-4.png||height="483" width="988"]]
1116
1117
1118 Or if you have below board, use below connection:
1119
1120
1121 [[image:image-20220610172924-5.png]]
1122
1123
1124 (((
1125 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:
1126 )))
1127
1128
1129 [[image:image-20220610172924-6.png||height="601" width="860"]]
1130
1131
1132
1133 == 3.2  Set Transmit Interval Time ==
1134
1135 Feature: Change LoRaWAN End Node Transmit Interval.
1136
1137 (% style="color:#037691" %)**AT Command: AT+TDC**
1138
1139 [[image:image-20220610173409-7.png]]
1140
1141
1142 (((
1143 (% style="color:#037691" %)**Downlink Command: 0x01**
1144 )))
1145
1146 (((
1147 (((
1148 Format: Command Code (0x01) followed by 3 bytes time value.
1149
1150 (((
1151 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1152 )))
1153
1154 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1155 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1156 )))
1157 )))
1158
1159
1160
1161
1162
1163 == 3.3  Set Interrupt Mode ==
1164
1165 Feature, Set Interrupt mode for GPIO_EXIT.
1166
1167 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1168
1169 [[image:image-20220610174917-9.png]]
1170
1171
1172 (% style="color:#037691" %)**Downlink Command: 0x06**
1173
1174 Format: Command Code (0x06) followed by 3 bytes.
1175
1176 (((
1177 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1178 )))
1179
1180 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1181 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1182
1183 = 4.  FAQ =
1184
1185 == 4.1  What is the frequency plan for LDDS75? ==
1186
1187 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"]]
1188
1189
1190
1191 == 4.2  How to change the LoRa Frequency Bands/Region ==
1192
1193 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1194 When downloading the images, choose the required image file for download. ​
1195
1196
1197
1198 == 4.3  Can I use LDDS75 in condensation environment? ==
1199
1200 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1201
1202
1203
1204 = 5.  Trouble Shooting =
1205
1206 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1207
1208 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1209
1210
1211 == 5.2  AT Command input doesn't work ==
1212
1213 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.
1214
1215 (((
1216
1217 )))
1218
1219
1220 = 6.  Order Info =
1221
1222
1223 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1224
1225
1226 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1227
1228 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1229 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1230 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1231 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1232 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1233 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1234 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1235 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1236
1237 (% style="color:blue" %)**YY**(%%): Battery Option
1238
1239 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1240 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1241
1242 = 7. ​ Packing Info =
1243
1244
1245 **Package Includes**:
1246
1247 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1248
1249 **Dimension and weight**:
1250
1251 * Device Size: cm
1252 * Device Weight: g
1253 * Package Size / pcs : cm
1254 * Weight / pcs : g
1255
1256 = 8.  ​Support =
1257
1258 * 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.
1259 * 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]].