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Version 170.5 by Xiaoling on 2022/06/15 09:46
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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
104
105
106 == 1.3  Suitable Container & Liquid ==
107
108 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
109 * Container shape is regular, and surface is smooth.
110 * Container Thickness:
111 ** Pure metal material.  2~~8mm, best is 3~~5mm
112 ** Pure non metal material: <10 mm
113 * Pure liquid without irregular deposition.
114
115
116
117 == 1.4  Mechanical ==
118
119 [[image:image-20220615090910-1.png]]
120
121
122 [[image:image-20220615090910-2.png]]
123
124
125
126 == 1.5  Install LDDS20 ==
127
128
129 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
130
131 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
132
133 [[image:image-20220615091045-3.png]]
134
135
136
137 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
138
139 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.
140
141 [[image:image-20220615092010-11.png]]
142
143
144 No polish needed if the container is shine metal surface without paint or non-metal container.
145
146 [[image:image-20220615092044-12.png]]
147
148
149 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
150
151 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.
152
153
154 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
155
156 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
157
158
159 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.
160
161
162 (% style="color:red" %)**LED Status:**
163
164 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
165
166 * (% 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.
167 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
168
169 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
170
171
172 (% style="color:red" %)**Note 2:**
173
174 (% 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.
175
176
177 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
178
179
180 Prepare Eproxy AB glue.
181
182 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
183
184 Reset LDDS20 and see if the BLUE LED is slowly blinking.
185
186 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
187
188
189 (% style="color:red" %)**Note 1:**
190
191 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
192
193
194 (% style="color:red" %)**Note 2:**
195
196 (% 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.
197
198
199
200 == 1.6 ​ Applications ==
201
202 * Smart liquid control solution.
203 * Smart liquefied gas solution.
204
205
206 == 1.7  Precautions ==
207
208 * 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.
209 * 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.
210 * 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.
211
212
213 == 1.8  Pin mapping and power on ==
214
215
216 [[image:1655257026882-201.png]]
217
218
219
220 = 2.  Configure LDDS20 to connect to LoRaWAN network =
221
222
223 == 2.1  How it works ==
224
225 (((
226 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 LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
227 )))
228
229 (((
230 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.
231 )))
232
233
234
235 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
236
237 (((
238 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.
239 )))
240
241 (((
242 [[image:1654848616367-242.png]]
243 )))
244
245 (((
246 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.
247 )))
248
249 (((
250
251
252 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
253 )))
254
255 (((
256 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
257 )))
258
259 [[image:image-20220607170145-1.jpeg]]
260
261
262 (((
263 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
264 )))
265
266 (((
267 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
268 )))
269
270 (((
271
272
273 **Add APP EUI in the application**
274 )))
275
276 [[image:image-20220610161353-4.png]]
277
278 [[image:image-20220610161353-5.png]]
279
280 [[image:image-20220610161353-6.png]]
281
282
283 [[image:image-20220610161353-7.png]]
284
285
286 You can also choose to create the device manually.
287
288 [[image:image-20220610161538-8.png]]
289
290
291
292 **Add APP KEY and DEV EUI**
293
294 [[image:image-20220610161538-9.png]]
295
296
297
298 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299
300
301 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
302
303 [[image:image-20220610161724-10.png]]
304
305
306 (((
307 (% 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.
308 )))
309
310 [[image:1654849068701-275.png]]
311
312
313
314 == 2.3  ​Uplink Payload ==
315
316 (((
317 (((
318 LDDS75 will uplink payload via LoRaWAN with below payload format: 
319 )))
320
321 (((
322 Uplink payload includes in total 4 bytes.
323 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
324 )))
325 )))
326
327 (((
328
329 )))
330
331 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
332 |=(% style="width: 62.5px;" %)(((
333 **Size (bytes)**
334 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
335 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
336 [[Distance>>||anchor="H2.3.2A0Distance"]]
337
338 (unit: mm)
339 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
340 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
341 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
342
343 [[image:1654850511545-399.png]]
344
345
346
347 === 2.3.1  Battery Info ===
348
349
350 Check the battery voltage for LDDS75.
351
352 Ex1: 0x0B45 = 2885mV
353
354 Ex2: 0x0B49 = 2889mV
355
356
357
358 === 2.3.2  Distance ===
359
360 (((
361 Get the distance. Flat object range 280mm - 7500mm.
362 )))
363
364 (((
365 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.**
366 )))
367
368
369 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
370 * 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.
371
372 === 2.3.3  Interrupt Pin ===
373
374 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.
375
376 **Example:**
377
378 0x00: Normal uplink packet.
379
380 0x01: Interrupt Uplink Packet.
381
382
383
384 === 2.3.4  DS18B20 Temperature sensor ===
385
386 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
387
388 **Example**:
389
390 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
391
392 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
393
394 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
395
396
397
398 === 2.3.5  Sensor Flag ===
399
400 (((
401 0x01: Detect Ultrasonic Sensor
402 )))
403
404 (((
405 0x00: No Ultrasonic Sensor
406 )))
407
408
409
410 === 2.3.6  Decode payload in The Things Network ===
411
412 While using TTN network, you can add the payload format to decode the payload.
413
414
415 [[image:1654850829385-439.png]]
416
417 The payload decoder function for TTN V3 is here:
418
419 (((
420 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/]]
421 )))
422
423
424
425 == 2.4  Uplink Interval ==
426
427 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"]]
428
429
430
431 == 2.5  ​Show Data in DataCake IoT Server ==
432
433 (((
434 [[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:
435 )))
436
437 (((
438
439 )))
440
441 (((
442 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
443 )))
444
445 (((
446 (% 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:**
447 )))
448
449
450 [[image:1654592790040-760.png]]
451
452
453 [[image:1654592800389-571.png]]
454
455
456 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
457
458 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
459
460 [[image:1654851029373-510.png]]
461
462
463 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
464
465 [[image:image-20220610165129-11.png||height="595" width="1088"]]
466
467
468
469 == 2.6  Frequency Plans ==
470
471 (((
472 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.
473 )))
474
475
476
477 === 2.6.1  EU863-870 (EU868) ===
478
479 (((
480 (% style="color:blue" %)**Uplink:**
481 )))
482
483 (((
484 868.1 - SF7BW125 to SF12BW125
485 )))
486
487 (((
488 868.3 - SF7BW125 to SF12BW125 and SF7BW250
489 )))
490
491 (((
492 868.5 - SF7BW125 to SF12BW125
493 )))
494
495 (((
496 867.1 - SF7BW125 to SF12BW125
497 )))
498
499 (((
500 867.3 - SF7BW125 to SF12BW125
501 )))
502
503 (((
504 867.5 - SF7BW125 to SF12BW125
505 )))
506
507 (((
508 867.7 - SF7BW125 to SF12BW125
509 )))
510
511 (((
512 867.9 - SF7BW125 to SF12BW125
513 )))
514
515 (((
516 868.8 - FSK
517 )))
518
519 (((
520
521 )))
522
523 (((
524 (% style="color:blue" %)**Downlink:**
525 )))
526
527 (((
528 Uplink channels 1-9 (RX1)
529 )))
530
531 (((
532 869.525 - SF9BW125 (RX2 downlink only)
533 )))
534
535
536
537 === 2.6.2  US902-928(US915) ===
538
539 (((
540 Used in USA, Canada and South America. Default use CHE=2
541
542 (% style="color:blue" %)**Uplink:**
543
544 903.9 - SF7BW125 to SF10BW125
545
546 904.1 - SF7BW125 to SF10BW125
547
548 904.3 - SF7BW125 to SF10BW125
549
550 904.5 - SF7BW125 to SF10BW125
551
552 904.7 - SF7BW125 to SF10BW125
553
554 904.9 - SF7BW125 to SF10BW125
555
556 905.1 - SF7BW125 to SF10BW125
557
558 905.3 - SF7BW125 to SF10BW125
559
560
561 (% style="color:blue" %)**Downlink:**
562
563 923.3 - SF7BW500 to SF12BW500
564
565 923.9 - SF7BW500 to SF12BW500
566
567 924.5 - SF7BW500 to SF12BW500
568
569 925.1 - SF7BW500 to SF12BW500
570
571 925.7 - SF7BW500 to SF12BW500
572
573 926.3 - SF7BW500 to SF12BW500
574
575 926.9 - SF7BW500 to SF12BW500
576
577 927.5 - SF7BW500 to SF12BW500
578
579 923.3 - SF12BW500(RX2 downlink only)
580
581
582
583 )))
584
585 === 2.6.3  CN470-510 (CN470) ===
586
587 (((
588 Used in China, Default use CHE=1
589 )))
590
591 (((
592 (% style="color:blue" %)**Uplink:**
593 )))
594
595 (((
596 486.3 - SF7BW125 to SF12BW125
597 )))
598
599 (((
600 486.5 - SF7BW125 to SF12BW125
601 )))
602
603 (((
604 486.7 - SF7BW125 to SF12BW125
605 )))
606
607 (((
608 486.9 - SF7BW125 to SF12BW125
609 )))
610
611 (((
612 487.1 - SF7BW125 to SF12BW125
613 )))
614
615 (((
616 487.3 - SF7BW125 to SF12BW125
617 )))
618
619 (((
620 487.5 - SF7BW125 to SF12BW125
621 )))
622
623 (((
624 487.7 - SF7BW125 to SF12BW125
625 )))
626
627 (((
628
629 )))
630
631 (((
632 (% style="color:blue" %)**Downlink:**
633 )))
634
635 (((
636 506.7 - SF7BW125 to SF12BW125
637 )))
638
639 (((
640 506.9 - SF7BW125 to SF12BW125
641 )))
642
643 (((
644 507.1 - SF7BW125 to SF12BW125
645 )))
646
647 (((
648 507.3 - SF7BW125 to SF12BW125
649 )))
650
651 (((
652 507.5 - SF7BW125 to SF12BW125
653 )))
654
655 (((
656 507.7 - SF7BW125 to SF12BW125
657 )))
658
659 (((
660 507.9 - SF7BW125 to SF12BW125
661 )))
662
663 (((
664 508.1 - SF7BW125 to SF12BW125
665 )))
666
667 (((
668 505.3 - SF12BW125 (RX2 downlink only)
669 )))
670
671
672
673 === 2.6.4  AU915-928(AU915) ===
674
675 (((
676 Default use CHE=2
677
678 (% style="color:blue" %)**Uplink:**
679
680 916.8 - SF7BW125 to SF12BW125
681
682 917.0 - SF7BW125 to SF12BW125
683
684 917.2 - SF7BW125 to SF12BW125
685
686 917.4 - SF7BW125 to SF12BW125
687
688 917.6 - SF7BW125 to SF12BW125
689
690 917.8 - SF7BW125 to SF12BW125
691
692 918.0 - SF7BW125 to SF12BW125
693
694 918.2 - SF7BW125 to SF12BW125
695
696
697 (% style="color:blue" %)**Downlink:**
698
699 923.3 - SF7BW500 to SF12BW500
700
701 923.9 - SF7BW500 to SF12BW500
702
703 924.5 - SF7BW500 to SF12BW500
704
705 925.1 - SF7BW500 to SF12BW500
706
707 925.7 - SF7BW500 to SF12BW500
708
709 926.3 - SF7BW500 to SF12BW500
710
711 926.9 - SF7BW500 to SF12BW500
712
713 927.5 - SF7BW500 to SF12BW500
714
715 923.3 - SF12BW500(RX2 downlink only)
716
717
718
719 )))
720
721 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
722
723 (((
724 (% style="color:blue" %)**Default Uplink channel:**
725 )))
726
727 (((
728 923.2 - SF7BW125 to SF10BW125
729 )))
730
731 (((
732 923.4 - SF7BW125 to SF10BW125
733 )))
734
735 (((
736
737 )))
738
739 (((
740 (% style="color:blue" %)**Additional Uplink Channel**:
741 )))
742
743 (((
744 (OTAA mode, channel added by JoinAccept message)
745 )))
746
747 (((
748
749 )))
750
751 (((
752 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
753 )))
754
755 (((
756 922.2 - SF7BW125 to SF10BW125
757 )))
758
759 (((
760 922.4 - SF7BW125 to SF10BW125
761 )))
762
763 (((
764 922.6 - SF7BW125 to SF10BW125
765 )))
766
767 (((
768 922.8 - SF7BW125 to SF10BW125
769 )))
770
771 (((
772 923.0 - SF7BW125 to SF10BW125
773 )))
774
775 (((
776 922.0 - SF7BW125 to SF10BW125
777 )))
778
779 (((
780
781 )))
782
783 (((
784 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
785 )))
786
787 (((
788 923.6 - SF7BW125 to SF10BW125
789 )))
790
791 (((
792 923.8 - SF7BW125 to SF10BW125
793 )))
794
795 (((
796 924.0 - SF7BW125 to SF10BW125
797 )))
798
799 (((
800 924.2 - SF7BW125 to SF10BW125
801 )))
802
803 (((
804 924.4 - SF7BW125 to SF10BW125
805 )))
806
807 (((
808 924.6 - SF7BW125 to SF10BW125
809 )))
810
811 (((
812
813 )))
814
815 (((
816 (% style="color:blue" %)**Downlink:**
817 )))
818
819 (((
820 Uplink channels 1-8 (RX1)
821 )))
822
823 (((
824 923.2 - SF10BW125 (RX2)
825 )))
826
827
828
829 === 2.6.6  KR920-923 (KR920) ===
830
831 (((
832 (% style="color:blue" %)**Default channel:**
833 )))
834
835 (((
836 922.1 - SF7BW125 to SF12BW125
837 )))
838
839 (((
840 922.3 - SF7BW125 to SF12BW125
841 )))
842
843 (((
844 922.5 - SF7BW125 to SF12BW125
845 )))
846
847 (((
848
849 )))
850
851 (((
852 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
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 (((
868 922.7 - SF7BW125 to SF12BW125
869 )))
870
871 (((
872 922.9 - SF7BW125 to SF12BW125
873 )))
874
875 (((
876 923.1 - SF7BW125 to SF12BW125
877 )))
878
879 (((
880 923.3 - SF7BW125 to SF12BW125
881 )))
882
883 (((
884
885 )))
886
887 (((
888 (% style="color:blue" %)**Downlink:**
889 )))
890
891 (((
892 Uplink channels 1-7(RX1)
893 )))
894
895 (((
896 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
897 )))
898
899
900
901 === 2.6.7  IN865-867 (IN865) ===
902
903 (((
904 (% style="color:blue" %)**Uplink:**
905 )))
906
907 (((
908 865.0625 - SF7BW125 to SF12BW125
909 )))
910
911 (((
912 865.4025 - SF7BW125 to SF12BW125
913 )))
914
915 (((
916 865.9850 - SF7BW125 to SF12BW125
917 )))
918
919 (((
920
921 )))
922
923 (((
924 (% style="color:blue" %)**Downlink:**
925 )))
926
927 (((
928 Uplink channels 1-3 (RX1)
929 )))
930
931 (((
932 866.550 - SF10BW125 (RX2)
933 )))
934
935
936
937 == 2.7  LED Indicator ==
938
939 The LDDS75 has an internal LED which is to show the status of different state.
940
941
942 * Blink once when device power on.
943 * The device detects the sensor and flashes 5 times.
944 * Solid ON for 5 seconds once device successful Join the network.
945 * Blink once when device transmit a packet.
946
947 == 2.8  ​Firmware Change Log ==
948
949
950 (((
951 **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/]]
952 )))
953
954 (((
955
956 )))
957
958 (((
959 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
960 )))
961
962
963
964 == 2.9  Mechanical ==
965
966
967 [[image:image-20220610172003-1.png]]
968
969
970 [[image:image-20220610172003-2.png]]
971
972
973
974 == 2.10  Battery Analysis ==
975
976 === 2.10.1  Battery Type ===
977
978 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.
979
980
981 The battery related documents as below:
982
983 * (((
984 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
985 )))
986 * (((
987 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
988 )))
989 * (((
990 [[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]]
991 )))
992
993 [[image:image-20220610172400-3.png]]
994
995
996
997 === 2.10.2  Replace the battery ===
998
999 (((
1000 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.
1001 )))
1002
1003 (((
1004
1005 )))
1006
1007 (((
1008 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)
1009 )))
1010
1011
1012
1013 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1014
1015 (((
1016 (((
1017 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1018 )))
1019 )))
1020
1021 * (((
1022 (((
1023 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1024 )))
1025 )))
1026 * (((
1027 (((
1028 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1029 )))
1030 )))
1031
1032 (((
1033 (((
1034
1035 )))
1036
1037 (((
1038 There are two kinds of commands to configure LDDS75, they are:
1039 )))
1040 )))
1041
1042 * (((
1043 (((
1044 (% style="color:#4f81bd" %)** General Commands**.
1045 )))
1046 )))
1047
1048 (((
1049 (((
1050 These commands are to configure:
1051 )))
1052 )))
1053
1054 * (((
1055 (((
1056 General system settings like: uplink interval.
1057 )))
1058 )))
1059 * (((
1060 (((
1061 LoRaWAN protocol & radio related command.
1062 )))
1063 )))
1064
1065 (((
1066 (((
1067 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]]
1068 )))
1069 )))
1070
1071 (((
1072 (((
1073
1074 )))
1075 )))
1076
1077 * (((
1078 (((
1079 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1080 )))
1081 )))
1082
1083 (((
1084 (((
1085 These commands only valid for LDDS75, as below:
1086 )))
1087 )))
1088
1089
1090
1091 == 3.1  Access AT Commands ==
1092
1093 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.
1094
1095 [[image:image-20220610172924-4.png||height="483" width="988"]]
1096
1097
1098 Or if you have below board, use below connection:
1099
1100
1101 [[image:image-20220610172924-5.png]]
1102
1103
1104 (((
1105 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:
1106 )))
1107
1108
1109 [[image:image-20220610172924-6.png||height="601" width="860"]]
1110
1111
1112
1113 == 3.2  Set Transmit Interval Time ==
1114
1115 Feature: Change LoRaWAN End Node Transmit Interval.
1116
1117 (% style="color:#037691" %)**AT Command: AT+TDC**
1118
1119 [[image:image-20220610173409-7.png]]
1120
1121
1122 (((
1123 (% style="color:#037691" %)**Downlink Command: 0x01**
1124 )))
1125
1126 (((
1127 (((
1128 Format: Command Code (0x01) followed by 3 bytes time value.
1129
1130 (((
1131 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1132 )))
1133
1134 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1135 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1136 )))
1137 )))
1138
1139
1140
1141
1142
1143 == 3.3  Set Interrupt Mode ==
1144
1145 Feature, Set Interrupt mode for GPIO_EXIT.
1146
1147 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1148
1149 [[image:image-20220610174917-9.png]]
1150
1151
1152 (% style="color:#037691" %)**Downlink Command: 0x06**
1153
1154 Format: Command Code (0x06) followed by 3 bytes.
1155
1156 (((
1157 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1158 )))
1159
1160 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1161 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1162
1163 = 4.  FAQ =
1164
1165 == 4.1  What is the frequency plan for LDDS75? ==
1166
1167 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"]]
1168
1169
1170
1171 == 4.2  How to change the LoRa Frequency Bands/Region ==
1172
1173 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1174 When downloading the images, choose the required image file for download. ​
1175
1176
1177
1178 == 4.3  Can I use LDDS75 in condensation environment? ==
1179
1180 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1181
1182
1183
1184 = 5.  Trouble Shooting =
1185
1186 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1187
1188 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1189
1190
1191 == 5.2  AT Command input doesn't work ==
1192
1193 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.
1194
1195 (((
1196
1197 )))
1198
1199
1200 = 6.  Order Info =
1201
1202
1203 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1204
1205
1206 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1207
1208 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1209 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1210 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1211 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1212 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1213 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1214 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1215 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1216
1217 (% style="color:blue" %)**YY**(%%): Battery Option
1218
1219 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1220 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1221
1222 = 7. ​ Packing Info =
1223
1224
1225 **Package Includes**:
1226
1227 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1228
1229 **Dimension and weight**:
1230
1231 * Device Size: cm
1232 * Device Weight: g
1233 * Package Size / pcs : cm
1234 * Weight / pcs : g
1235
1236 = 8.  ​Support =
1237
1238 * 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.
1239 * 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]].