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Version 169.2 by Xiaoling on 2022/06/15 09:25
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
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5
6
7 **Table of Contents:**
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15
16 = 1.  Introduction =
17
18 == 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
19
20 (((
21
22
23 (((
24 (((
25 (((
26 The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
27 )))
28
29 (((
30
31 )))
32
33 (((
34 The LDDS20 sensor is installed directly below the container to detect the height of the liquid level. User doesn’t need to open a hole on the container to be tested. The (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**. 
35 )))
36
37 (((
38
39 )))
40
41 (((
42 LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
43 )))
44
45 (((
46
47 )))
48
49 (((
50 The LoRa wireless technology used in LDDS20 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
51 )))
52
53 (((
54
55 )))
56
57 (((
58 LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 )))
60
61 (((
62
63 )))
64
65 (((
66 Each LDDS20 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
67 )))
68
69 (((
70
71 )))
72 )))
73
74 (((
75 (((
76 (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 )))
78 )))
79 )))
80 )))
81
82
83 [[image:1655255122126-327.png]]
84
85
86
87 == ​1.2  Features ==
88
89 * LoRaWAN 1.0.3 Class A
90 * Ultra low power consumption
91 * Liquid Level Measurement by Ultrasonic technology
92 * Measure through container, No need to contact Liquid.
93 * Valid level range 20mm - 2000mm
94 * Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
95 * Cable Length : 25cm
96 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 * AT Commands to change parameters
98 * Uplink on periodically
99 * Downlink to change configure
100 * IP66 Waterproof Enclosure
101 * 8500mAh Battery for long term use
102
103
104
105 == 1.3  Suitable Container & Liquid ==
106
107 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
108 * Container shape is regular, and surface is smooth.
109 * Container Thickness:
110 ** Pure metal material.  2~~8mm, best is 3~~5mm
111 ** Pure non metal material: <10 mm
112 * Pure liquid without irregular deposition.
113
114
115
116 == 1.4  Mechanical ==
117
118 [[image:image-20220615090910-1.png]]
119
120
121 [[image:image-20220615090910-2.png]]
122
123
124
125 == 1.5  Install LDDS20 ==
126
127
128 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
129
130 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
131
132 [[image:image-20220615091045-3.png]]
133
134
135
136 (% style="color:blue" %)**Step 2**(%%): Polish the installation point.
137
138 For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
139
140 [[image:image-20220615092010-11.png]]
141
142
143 No polish needed if the container is shine metal surface without paint or non-metal container.
144
145 [[image:image-20220615092044-12.png]]
146
147
148 (% style="color:blue" %)**Step3: **(%%)Test the installation point.
149
150 Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
151
152
153 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
154
155 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
156
157
158 After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
159
160
161 (% style="color:red" %)**LED Status:**
162
163 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
164
165 * (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
166 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
167
168 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
169
170 Note 2:
171
172 Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
173
174
175 (% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
176
177 [[image:image-20220615091045-8.png]]
178
179 Prepare Eproxy AB glue.
180
181
182 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
183
184
185 Reset LDDS20 and see if the BLUE LED is slowly blinking.
186
187 [[image:image-20220615091045-9.png]]
188
189 (% style="color:red" %)Note1:
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:blue" %)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
201
202
203 == 1.5 ​ Applications ==
204
205 * Horizontal distance measurement
206 * Liquid level measurement
207 * Parking management system
208 * Object proximity and presence detection
209 * Intelligent trash can management system
210 * Robot obstacle avoidance
211 * Automatic control
212 * Sewer
213 * Bottom water level monitoring
214
215 == 1.6  Pin mapping and power on ==
216
217
218 [[image:1654847583902-256.png]]
219
220
221
222 = 2.  Configure LDDS75 to connect to LoRaWAN network =
223
224 == 2.1  How it works ==
225
226 (((
227 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
228 )))
229
230 (((
231 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.
232 )))
233
234
235
236 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
237
238 (((
239 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.
240 )))
241
242 (((
243 [[image:1654848616367-242.png]]
244 )))
245
246 (((
247 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.
248 )))
249
250 (((
251
252
253 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
254 )))
255
256 (((
257 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
258 )))
259
260 [[image:image-20220607170145-1.jpeg]]
261
262
263 (((
264 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
265 )))
266
267 (((
268 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
269 )))
270
271 (((
272
273
274 **Add APP EUI in the application**
275 )))
276
277 [[image:image-20220610161353-4.png]]
278
279 [[image:image-20220610161353-5.png]]
280
281 [[image:image-20220610161353-6.png]]
282
283
284 [[image:image-20220610161353-7.png]]
285
286
287 You can also choose to create the device manually.
288
289 [[image:image-20220610161538-8.png]]
290
291
292
293 **Add APP KEY and DEV EUI**
294
295 [[image:image-20220610161538-9.png]]
296
297
298
299 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
300
301
302 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
303
304 [[image:image-20220610161724-10.png]]
305
306
307 (((
308 (% 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.
309 )))
310
311 [[image:1654849068701-275.png]]
312
313
314
315 == 2.3  ​Uplink Payload ==
316
317 (((
318 (((
319 LDDS75 will uplink payload via LoRaWAN with below payload format: 
320 )))
321
322 (((
323 Uplink payload includes in total 4 bytes.
324 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
325 )))
326 )))
327
328 (((
329
330 )))
331
332 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
333 |=(% style="width: 62.5px;" %)(((
334 **Size (bytes)**
335 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
336 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
337 [[Distance>>||anchor="H2.3.2A0Distance"]]
338
339 (unit: mm)
340 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
341 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
342 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
343
344 [[image:1654850511545-399.png]]
345
346
347
348 === 2.3.1  Battery Info ===
349
350
351 Check the battery voltage for LDDS75.
352
353 Ex1: 0x0B45 = 2885mV
354
355 Ex2: 0x0B49 = 2889mV
356
357
358
359 === 2.3.2  Distance ===
360
361 (((
362 Get the distance. Flat object range 280mm - 7500mm.
363 )))
364
365 (((
366 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.**
367 )))
368
369
370 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
371 * 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.
372
373 === 2.3.3  Interrupt Pin ===
374
375 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.
376
377 **Example:**
378
379 0x00: Normal uplink packet.
380
381 0x01: Interrupt Uplink Packet.
382
383
384
385 === 2.3.4  DS18B20 Temperature sensor ===
386
387 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
388
389 **Example**:
390
391 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
392
393 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
394
395 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
396
397
398
399 === 2.3.5  Sensor Flag ===
400
401 (((
402 0x01: Detect Ultrasonic Sensor
403 )))
404
405 (((
406 0x00: No Ultrasonic Sensor
407 )))
408
409
410
411 === 2.3.6  Decode payload in The Things Network ===
412
413 While using TTN network, you can add the payload format to decode the payload.
414
415
416 [[image:1654850829385-439.png]]
417
418 The payload decoder function for TTN V3 is here:
419
420 (((
421 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/]]
422 )))
423
424
425
426 == 2.4  Uplink Interval ==
427
428 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"]]
429
430
431
432 == 2.5  ​Show Data in DataCake IoT Server ==
433
434 (((
435 [[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:
436 )))
437
438 (((
439
440 )))
441
442 (((
443 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
444 )))
445
446 (((
447 (% 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:**
448 )))
449
450
451 [[image:1654592790040-760.png]]
452
453
454 [[image:1654592800389-571.png]]
455
456
457 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
458
459 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
460
461 [[image:1654851029373-510.png]]
462
463
464 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
465
466 [[image:image-20220610165129-11.png||height="595" width="1088"]]
467
468
469
470 == 2.6  Frequency Plans ==
471
472 (((
473 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.
474 )))
475
476
477
478 === 2.6.1  EU863-870 (EU868) ===
479
480 (((
481 (% style="color:blue" %)**Uplink:**
482 )))
483
484 (((
485 868.1 - SF7BW125 to SF12BW125
486 )))
487
488 (((
489 868.3 - SF7BW125 to SF12BW125 and SF7BW250
490 )))
491
492 (((
493 868.5 - SF7BW125 to SF12BW125
494 )))
495
496 (((
497 867.1 - SF7BW125 to SF12BW125
498 )))
499
500 (((
501 867.3 - SF7BW125 to SF12BW125
502 )))
503
504 (((
505 867.5 - SF7BW125 to SF12BW125
506 )))
507
508 (((
509 867.7 - SF7BW125 to SF12BW125
510 )))
511
512 (((
513 867.9 - SF7BW125 to SF12BW125
514 )))
515
516 (((
517 868.8 - FSK
518 )))
519
520 (((
521
522 )))
523
524 (((
525 (% style="color:blue" %)**Downlink:**
526 )))
527
528 (((
529 Uplink channels 1-9 (RX1)
530 )))
531
532 (((
533 869.525 - SF9BW125 (RX2 downlink only)
534 )))
535
536
537
538 === 2.6.2  US902-928(US915) ===
539
540 (((
541 Used in USA, Canada and South America. Default use CHE=2
542
543 (% style="color:blue" %)**Uplink:**
544
545 903.9 - SF7BW125 to SF10BW125
546
547 904.1 - SF7BW125 to SF10BW125
548
549 904.3 - SF7BW125 to SF10BW125
550
551 904.5 - SF7BW125 to SF10BW125
552
553 904.7 - SF7BW125 to SF10BW125
554
555 904.9 - SF7BW125 to SF10BW125
556
557 905.1 - SF7BW125 to SF10BW125
558
559 905.3 - SF7BW125 to SF10BW125
560
561
562 (% style="color:blue" %)**Downlink:**
563
564 923.3 - SF7BW500 to SF12BW500
565
566 923.9 - SF7BW500 to SF12BW500
567
568 924.5 - SF7BW500 to SF12BW500
569
570 925.1 - SF7BW500 to SF12BW500
571
572 925.7 - SF7BW500 to SF12BW500
573
574 926.3 - SF7BW500 to SF12BW500
575
576 926.9 - SF7BW500 to SF12BW500
577
578 927.5 - SF7BW500 to SF12BW500
579
580 923.3 - SF12BW500(RX2 downlink only)
581
582
583
584 )))
585
586 === 2.6.3  CN470-510 (CN470) ===
587
588 (((
589 Used in China, Default use CHE=1
590 )))
591
592 (((
593 (% style="color:blue" %)**Uplink:**
594 )))
595
596 (((
597 486.3 - SF7BW125 to SF12BW125
598 )))
599
600 (((
601 486.5 - SF7BW125 to SF12BW125
602 )))
603
604 (((
605 486.7 - SF7BW125 to SF12BW125
606 )))
607
608 (((
609 486.9 - SF7BW125 to SF12BW125
610 )))
611
612 (((
613 487.1 - SF7BW125 to SF12BW125
614 )))
615
616 (((
617 487.3 - SF7BW125 to SF12BW125
618 )))
619
620 (((
621 487.5 - SF7BW125 to SF12BW125
622 )))
623
624 (((
625 487.7 - SF7BW125 to SF12BW125
626 )))
627
628 (((
629
630 )))
631
632 (((
633 (% style="color:blue" %)**Downlink:**
634 )))
635
636 (((
637 506.7 - SF7BW125 to SF12BW125
638 )))
639
640 (((
641 506.9 - SF7BW125 to SF12BW125
642 )))
643
644 (((
645 507.1 - SF7BW125 to SF12BW125
646 )))
647
648 (((
649 507.3 - SF7BW125 to SF12BW125
650 )))
651
652 (((
653 507.5 - SF7BW125 to SF12BW125
654 )))
655
656 (((
657 507.7 - SF7BW125 to SF12BW125
658 )))
659
660 (((
661 507.9 - SF7BW125 to SF12BW125
662 )))
663
664 (((
665 508.1 - SF7BW125 to SF12BW125
666 )))
667
668 (((
669 505.3 - SF12BW125 (RX2 downlink only)
670 )))
671
672
673
674 === 2.6.4  AU915-928(AU915) ===
675
676 (((
677 Default use CHE=2
678
679 (% style="color:blue" %)**Uplink:**
680
681 916.8 - SF7BW125 to SF12BW125
682
683 917.0 - SF7BW125 to SF12BW125
684
685 917.2 - SF7BW125 to SF12BW125
686
687 917.4 - SF7BW125 to SF12BW125
688
689 917.6 - SF7BW125 to SF12BW125
690
691 917.8 - SF7BW125 to SF12BW125
692
693 918.0 - SF7BW125 to SF12BW125
694
695 918.2 - SF7BW125 to SF12BW125
696
697
698 (% style="color:blue" %)**Downlink:**
699
700 923.3 - SF7BW500 to SF12BW500
701
702 923.9 - SF7BW500 to SF12BW500
703
704 924.5 - SF7BW500 to SF12BW500
705
706 925.1 - SF7BW500 to SF12BW500
707
708 925.7 - SF7BW500 to SF12BW500
709
710 926.3 - SF7BW500 to SF12BW500
711
712 926.9 - SF7BW500 to SF12BW500
713
714 927.5 - SF7BW500 to SF12BW500
715
716 923.3 - SF12BW500(RX2 downlink only)
717
718
719
720 )))
721
722 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
723
724 (((
725 (% style="color:blue" %)**Default Uplink channel:**
726 )))
727
728 (((
729 923.2 - SF7BW125 to SF10BW125
730 )))
731
732 (((
733 923.4 - SF7BW125 to SF10BW125
734 )))
735
736 (((
737
738 )))
739
740 (((
741 (% style="color:blue" %)**Additional Uplink Channel**:
742 )))
743
744 (((
745 (OTAA mode, channel added by JoinAccept message)
746 )))
747
748 (((
749
750 )))
751
752 (((
753 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
754 )))
755
756 (((
757 922.2 - SF7BW125 to SF10BW125
758 )))
759
760 (((
761 922.4 - SF7BW125 to SF10BW125
762 )))
763
764 (((
765 922.6 - SF7BW125 to SF10BW125
766 )))
767
768 (((
769 922.8 - SF7BW125 to SF10BW125
770 )))
771
772 (((
773 923.0 - SF7BW125 to SF10BW125
774 )))
775
776 (((
777 922.0 - SF7BW125 to SF10BW125
778 )))
779
780 (((
781
782 )))
783
784 (((
785 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
786 )))
787
788 (((
789 923.6 - SF7BW125 to SF10BW125
790 )))
791
792 (((
793 923.8 - SF7BW125 to SF10BW125
794 )))
795
796 (((
797 924.0 - SF7BW125 to SF10BW125
798 )))
799
800 (((
801 924.2 - SF7BW125 to SF10BW125
802 )))
803
804 (((
805 924.4 - SF7BW125 to SF10BW125
806 )))
807
808 (((
809 924.6 - SF7BW125 to SF10BW125
810 )))
811
812 (((
813
814 )))
815
816 (((
817 (% style="color:blue" %)**Downlink:**
818 )))
819
820 (((
821 Uplink channels 1-8 (RX1)
822 )))
823
824 (((
825 923.2 - SF10BW125 (RX2)
826 )))
827
828
829
830 === 2.6.6  KR920-923 (KR920) ===
831
832 (((
833 (% style="color:blue" %)**Default channel:**
834 )))
835
836 (((
837 922.1 - SF7BW125 to SF12BW125
838 )))
839
840 (((
841 922.3 - SF7BW125 to SF12BW125
842 )))
843
844 (((
845 922.5 - SF7BW125 to SF12BW125
846 )))
847
848 (((
849
850 )))
851
852 (((
853 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
854 )))
855
856 (((
857 922.1 - SF7BW125 to SF12BW125
858 )))
859
860 (((
861 922.3 - SF7BW125 to SF12BW125
862 )))
863
864 (((
865 922.5 - SF7BW125 to SF12BW125
866 )))
867
868 (((
869 922.7 - SF7BW125 to SF12BW125
870 )))
871
872 (((
873 922.9 - SF7BW125 to SF12BW125
874 )))
875
876 (((
877 923.1 - SF7BW125 to SF12BW125
878 )))
879
880 (((
881 923.3 - SF7BW125 to SF12BW125
882 )))
883
884 (((
885
886 )))
887
888 (((
889 (% style="color:blue" %)**Downlink:**
890 )))
891
892 (((
893 Uplink channels 1-7(RX1)
894 )))
895
896 (((
897 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
898 )))
899
900
901
902 === 2.6.7  IN865-867 (IN865) ===
903
904 (((
905 (% style="color:blue" %)**Uplink:**
906 )))
907
908 (((
909 865.0625 - SF7BW125 to SF12BW125
910 )))
911
912 (((
913 865.4025 - SF7BW125 to SF12BW125
914 )))
915
916 (((
917 865.9850 - SF7BW125 to SF12BW125
918 )))
919
920 (((
921
922 )))
923
924 (((
925 (% style="color:blue" %)**Downlink:**
926 )))
927
928 (((
929 Uplink channels 1-3 (RX1)
930 )))
931
932 (((
933 866.550 - SF10BW125 (RX2)
934 )))
935
936
937
938 == 2.7  LED Indicator ==
939
940 The LDDS75 has an internal LED which is to show the status of different state.
941
942
943 * Blink once when device power on.
944 * The device detects the sensor and flashes 5 times.
945 * Solid ON for 5 seconds once device successful Join the network.
946 * Blink once when device transmit a packet.
947
948 == 2.8  ​Firmware Change Log ==
949
950
951 (((
952 **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/]]
953 )))
954
955 (((
956
957 )))
958
959 (((
960 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
961 )))
962
963
964
965 == 2.9  Mechanical ==
966
967
968 [[image:image-20220610172003-1.png]]
969
970
971 [[image:image-20220610172003-2.png]]
972
973
974
975 == 2.10  Battery Analysis ==
976
977 === 2.10.1  Battery Type ===
978
979 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.
980
981
982 The battery related documents as below:
983
984 * (((
985 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
986 )))
987 * (((
988 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
989 )))
990 * (((
991 [[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]]
992 )))
993
994 [[image:image-20220610172400-3.png]]
995
996
997
998 === 2.10.2  Replace the battery ===
999
1000 (((
1001 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.
1002 )))
1003
1004 (((
1005
1006 )))
1007
1008 (((
1009 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)
1010 )))
1011
1012
1013
1014 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1015
1016 (((
1017 (((
1018 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1019 )))
1020 )))
1021
1022 * (((
1023 (((
1024 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1025 )))
1026 )))
1027 * (((
1028 (((
1029 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1030 )))
1031 )))
1032
1033 (((
1034 (((
1035
1036 )))
1037
1038 (((
1039 There are two kinds of commands to configure LDDS75, they are:
1040 )))
1041 )))
1042
1043 * (((
1044 (((
1045 (% style="color:#4f81bd" %)** General Commands**.
1046 )))
1047 )))
1048
1049 (((
1050 (((
1051 These commands are to configure:
1052 )))
1053 )))
1054
1055 * (((
1056 (((
1057 General system settings like: uplink interval.
1058 )))
1059 )))
1060 * (((
1061 (((
1062 LoRaWAN protocol & radio related command.
1063 )))
1064 )))
1065
1066 (((
1067 (((
1068 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]]
1069 )))
1070 )))
1071
1072 (((
1073 (((
1074
1075 )))
1076 )))
1077
1078 * (((
1079 (((
1080 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1081 )))
1082 )))
1083
1084 (((
1085 (((
1086 These commands only valid for LDDS75, as below:
1087 )))
1088 )))
1089
1090
1091
1092 == 3.1  Access AT Commands ==
1093
1094 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.
1095
1096 [[image:image-20220610172924-4.png||height="483" width="988"]]
1097
1098
1099 Or if you have below board, use below connection:
1100
1101
1102 [[image:image-20220610172924-5.png]]
1103
1104
1105 (((
1106 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:
1107 )))
1108
1109
1110 [[image:image-20220610172924-6.png||height="601" width="860"]]
1111
1112
1113
1114 == 3.2  Set Transmit Interval Time ==
1115
1116 Feature: Change LoRaWAN End Node Transmit Interval.
1117
1118 (% style="color:#037691" %)**AT Command: AT+TDC**
1119
1120 [[image:image-20220610173409-7.png]]
1121
1122
1123 (((
1124 (% style="color:#037691" %)**Downlink Command: 0x01**
1125 )))
1126
1127 (((
1128 (((
1129 Format: Command Code (0x01) followed by 3 bytes time value.
1130
1131 (((
1132 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1133 )))
1134
1135 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1136 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1137 )))
1138 )))
1139
1140
1141
1142
1143
1144 == 3.3  Set Interrupt Mode ==
1145
1146 Feature, Set Interrupt mode for GPIO_EXIT.
1147
1148 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1149
1150 [[image:image-20220610174917-9.png]]
1151
1152
1153 (% style="color:#037691" %)**Downlink Command: 0x06**
1154
1155 Format: Command Code (0x06) followed by 3 bytes.
1156
1157 (((
1158 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1159 )))
1160
1161 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1162 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1163
1164 = 4.  FAQ =
1165
1166 == 4.1  What is the frequency plan for LDDS75? ==
1167
1168 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"]]
1169
1170
1171
1172 == 4.2  How to change the LoRa Frequency Bands/Region ==
1173
1174 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1175 When downloading the images, choose the required image file for download. ​
1176
1177
1178
1179 == 4.3  Can I use LDDS75 in condensation environment? ==
1180
1181 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1182
1183
1184
1185 = 5.  Trouble Shooting =
1186
1187 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1188
1189 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1190
1191
1192 == 5.2  AT Command input doesn't work ==
1193
1194 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.
1195
1196 (((
1197
1198 )))
1199
1200
1201 = 6.  Order Info =
1202
1203
1204 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1205
1206
1207 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1208
1209 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1210 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1211 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1212 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1213 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1214 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1215 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1216 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1217
1218 (% style="color:blue" %)**YY**(%%): Battery Option
1219
1220 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1221 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1222
1223 = 7. ​ Packing Info =
1224
1225
1226 **Package Includes**:
1227
1228 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1229
1230 **Dimension and weight**:
1231
1232 * Device Size: cm
1233 * Device Weight: g
1234 * Package Size / pcs : cm
1235 * Weight / pcs : g
1236
1237 = 8.  ​Support =
1238
1239 * 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.
1240 * 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]].