Version 167.2 by Xiaoling on 2022/06/15 09:21
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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 == 1.3  Suitable Container & Liquid ==
105
106 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 * Container shape is regular, and surface is smooth.
108 * Container Thickness:
109 ** Pure metal material.  2~~8mm, best is 3~~5mm
110 ** Pure non metal material: <10 mm
111 * Pure liquid without irregular deposition.
112
113
114 == 1.4  Mechanical ==
115
116 [[image:image-20220615090910-1.png]]
117
118
119 [[image:image-20220615090910-2.png]]
120
121
122
123 == 1.5  Install LDDS20 ==
124
125
126 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
127
128 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
129
130 [[image:image-20220615091045-3.png]]
131
132
133
134 (% style="color:blue" %)**Step 2**(%%): Polish the installation point.
135
136 For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
137
138 [[image:image-20220615092010-11.png]]
139
140
141 No polish needed if the container is shine metal surface without paint or non-metal container.
142
143 [[image:image-20220615092044-12.png]]
144
145
146 (% style="color:blue" %)**Step3: **(%%)Test the installation point.
147
148 Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
149
150
151 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152
153
154
155 |(((
156 BLUE LED
157 )))
158
159 [[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
160
161
162
163 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.
164
165
166 (% style="color:blue" %)LED Status:
167
168 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
169
170 * (% 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.
171 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
172
173 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
174
175 Note 2:
176
177 Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
178
179
180 (% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
181
182 [[image:image-20220615091045-8.png]]
183
184 Prepare Eproxy AB glue.
185
186
187 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
188
189
190 Reset LDDS20 and see if the BLUE LED is slowly blinking.
191
192 [[image:image-20220615091045-9.png]]
193
194 (% style="color:red" %)Note1:
195
196 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
197
198
199 (% style="color:red" %)Note 2:
200
201 (% 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.
202
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205
206
207
208 == 1.5 ​ Applications ==
209
210 * Horizontal distance measurement
211 * Liquid level measurement
212 * Parking management system
213 * Object proximity and presence detection
214 * Intelligent trash can management system
215 * Robot obstacle avoidance
216 * Automatic control
217 * Sewer
218 * Bottom water level monitoring
219
220 == 1.6  Pin mapping and power on ==
221
222
223 [[image:1654847583902-256.png]]
224
225
226
227 = 2.  Configure LDDS75 to connect to LoRaWAN network =
228
229 == 2.1  How it works ==
230
231 (((
232 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
233 )))
234
235 (((
236 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.
237 )))
238
239
240
241 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
242
243 (((
244 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.
245 )))
246
247 (((
248 [[image:1654848616367-242.png]]
249 )))
250
251 (((
252 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.
253 )))
254
255 (((
256
257
258 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
259 )))
260
261 (((
262 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
263 )))
264
265 [[image:image-20220607170145-1.jpeg]]
266
267
268 (((
269 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
270 )))
271
272 (((
273 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
274 )))
275
276 (((
277
278
279 **Add APP EUI in the application**
280 )))
281
282 [[image:image-20220610161353-4.png]]
283
284 [[image:image-20220610161353-5.png]]
285
286 [[image:image-20220610161353-6.png]]
287
288
289 [[image:image-20220610161353-7.png]]
290
291
292 You can also choose to create the device manually.
293
294 [[image:image-20220610161538-8.png]]
295
296
297
298 **Add APP KEY and DEV EUI**
299
300 [[image:image-20220610161538-9.png]]
301
302
303
304 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
305
306
307 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
308
309 [[image:image-20220610161724-10.png]]
310
311
312 (((
313 (% 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.
314 )))
315
316 [[image:1654849068701-275.png]]
317
318
319
320 == 2.3  ​Uplink Payload ==
321
322 (((
323 (((
324 LDDS75 will uplink payload via LoRaWAN with below payload format: 
325 )))
326
327 (((
328 Uplink payload includes in total 4 bytes.
329 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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331 )))
332
333 (((
334
335 )))
336
337 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
338 |=(% style="width: 62.5px;" %)(((
339 **Size (bytes)**
340 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
341 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
342 [[Distance>>||anchor="H2.3.2A0Distance"]]
343
344 (unit: mm)
345 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
346 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
347 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
348
349 [[image:1654850511545-399.png]]
350
351
352
353 === 2.3.1  Battery Info ===
354
355
356 Check the battery voltage for LDDS75.
357
358 Ex1: 0x0B45 = 2885mV
359
360 Ex2: 0x0B49 = 2889mV
361
362
363
364 === 2.3.2  Distance ===
365
366 (((
367 Get the distance. Flat object range 280mm - 7500mm.
368 )))
369
370 (((
371 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.**
372 )))
373
374
375 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
376 * 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.
377
378 === 2.3.3  Interrupt Pin ===
379
380 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.
381
382 **Example:**
383
384 0x00: Normal uplink packet.
385
386 0x01: Interrupt Uplink Packet.
387
388
389
390 === 2.3.4  DS18B20 Temperature sensor ===
391
392 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
393
394 **Example**:
395
396 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
397
398 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
399
400 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
401
402
403
404 === 2.3.5  Sensor Flag ===
405
406 (((
407 0x01: Detect Ultrasonic Sensor
408 )))
409
410 (((
411 0x00: No Ultrasonic Sensor
412 )))
413
414
415
416 === 2.3.6  Decode payload in The Things Network ===
417
418 While using TTN network, you can add the payload format to decode the payload.
419
420
421 [[image:1654850829385-439.png]]
422
423 The payload decoder function for TTN V3 is here:
424
425 (((
426 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/]]
427 )))
428
429
430
431 == 2.4  Uplink Interval ==
432
433 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"]]
434
435
436
437 == 2.5  ​Show Data in DataCake IoT Server ==
438
439 (((
440 [[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:
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442
443 (((
444
445 )))
446
447 (((
448 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
449 )))
450
451 (((
452 (% 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:**
453 )))
454
455
456 [[image:1654592790040-760.png]]
457
458
459 [[image:1654592800389-571.png]]
460
461
462 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
463
464 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
465
466 [[image:1654851029373-510.png]]
467
468
469 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
470
471 [[image:image-20220610165129-11.png||height="595" width="1088"]]
472
473
474
475 == 2.6  Frequency Plans ==
476
477 (((
478 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.
479 )))
480
481
482
483 === 2.6.1  EU863-870 (EU868) ===
484
485 (((
486 (% style="color:blue" %)**Uplink:**
487 )))
488
489 (((
490 868.1 - SF7BW125 to SF12BW125
491 )))
492
493 (((
494 868.3 - SF7BW125 to SF12BW125 and SF7BW250
495 )))
496
497 (((
498 868.5 - SF7BW125 to SF12BW125
499 )))
500
501 (((
502 867.1 - SF7BW125 to SF12BW125
503 )))
504
505 (((
506 867.3 - SF7BW125 to SF12BW125
507 )))
508
509 (((
510 867.5 - SF7BW125 to SF12BW125
511 )))
512
513 (((
514 867.7 - SF7BW125 to SF12BW125
515 )))
516
517 (((
518 867.9 - SF7BW125 to SF12BW125
519 )))
520
521 (((
522 868.8 - FSK
523 )))
524
525 (((
526
527 )))
528
529 (((
530 (% style="color:blue" %)**Downlink:**
531 )))
532
533 (((
534 Uplink channels 1-9 (RX1)
535 )))
536
537 (((
538 869.525 - SF9BW125 (RX2 downlink only)
539 )))
540
541
542
543 === 2.6.2  US902-928(US915) ===
544
545 (((
546 Used in USA, Canada and South America. Default use CHE=2
547
548 (% style="color:blue" %)**Uplink:**
549
550 903.9 - SF7BW125 to SF10BW125
551
552 904.1 - SF7BW125 to SF10BW125
553
554 904.3 - SF7BW125 to SF10BW125
555
556 904.5 - SF7BW125 to SF10BW125
557
558 904.7 - SF7BW125 to SF10BW125
559
560 904.9 - SF7BW125 to SF10BW125
561
562 905.1 - SF7BW125 to SF10BW125
563
564 905.3 - SF7BW125 to SF10BW125
565
566
567 (% style="color:blue" %)**Downlink:**
568
569 923.3 - SF7BW500 to SF12BW500
570
571 923.9 - SF7BW500 to SF12BW500
572
573 924.5 - SF7BW500 to SF12BW500
574
575 925.1 - SF7BW500 to SF12BW500
576
577 925.7 - SF7BW500 to SF12BW500
578
579 926.3 - SF7BW500 to SF12BW500
580
581 926.9 - SF7BW500 to SF12BW500
582
583 927.5 - SF7BW500 to SF12BW500
584
585 923.3 - SF12BW500(RX2 downlink only)
586
587
588
589 )))
590
591 === 2.6.3  CN470-510 (CN470) ===
592
593 (((
594 Used in China, Default use CHE=1
595 )))
596
597 (((
598 (% style="color:blue" %)**Uplink:**
599 )))
600
601 (((
602 486.3 - SF7BW125 to SF12BW125
603 )))
604
605 (((
606 486.5 - SF7BW125 to SF12BW125
607 )))
608
609 (((
610 486.7 - SF7BW125 to SF12BW125
611 )))
612
613 (((
614 486.9 - SF7BW125 to SF12BW125
615 )))
616
617 (((
618 487.1 - SF7BW125 to SF12BW125
619 )))
620
621 (((
622 487.3 - SF7BW125 to SF12BW125
623 )))
624
625 (((
626 487.5 - SF7BW125 to SF12BW125
627 )))
628
629 (((
630 487.7 - SF7BW125 to SF12BW125
631 )))
632
633 (((
634
635 )))
636
637 (((
638 (% style="color:blue" %)**Downlink:**
639 )))
640
641 (((
642 506.7 - SF7BW125 to SF12BW125
643 )))
644
645 (((
646 506.9 - SF7BW125 to SF12BW125
647 )))
648
649 (((
650 507.1 - SF7BW125 to SF12BW125
651 )))
652
653 (((
654 507.3 - SF7BW125 to SF12BW125
655 )))
656
657 (((
658 507.5 - SF7BW125 to SF12BW125
659 )))
660
661 (((
662 507.7 - SF7BW125 to SF12BW125
663 )))
664
665 (((
666 507.9 - SF7BW125 to SF12BW125
667 )))
668
669 (((
670 508.1 - SF7BW125 to SF12BW125
671 )))
672
673 (((
674 505.3 - SF12BW125 (RX2 downlink only)
675 )))
676
677
678
679 === 2.6.4  AU915-928(AU915) ===
680
681 (((
682 Default use CHE=2
683
684 (% style="color:blue" %)**Uplink:**
685
686 916.8 - SF7BW125 to SF12BW125
687
688 917.0 - SF7BW125 to SF12BW125
689
690 917.2 - SF7BW125 to SF12BW125
691
692 917.4 - SF7BW125 to SF12BW125
693
694 917.6 - SF7BW125 to SF12BW125
695
696 917.8 - SF7BW125 to SF12BW125
697
698 918.0 - SF7BW125 to SF12BW125
699
700 918.2 - SF7BW125 to SF12BW125
701
702
703 (% style="color:blue" %)**Downlink:**
704
705 923.3 - SF7BW500 to SF12BW500
706
707 923.9 - SF7BW500 to SF12BW500
708
709 924.5 - SF7BW500 to SF12BW500
710
711 925.1 - SF7BW500 to SF12BW500
712
713 925.7 - SF7BW500 to SF12BW500
714
715 926.3 - SF7BW500 to SF12BW500
716
717 926.9 - SF7BW500 to SF12BW500
718
719 927.5 - SF7BW500 to SF12BW500
720
721 923.3 - SF12BW500(RX2 downlink only)
722
723
724
725 )))
726
727 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
728
729 (((
730 (% style="color:blue" %)**Default Uplink channel:**
731 )))
732
733 (((
734 923.2 - SF7BW125 to SF10BW125
735 )))
736
737 (((
738 923.4 - SF7BW125 to SF10BW125
739 )))
740
741 (((
742
743 )))
744
745 (((
746 (% style="color:blue" %)**Additional Uplink Channel**:
747 )))
748
749 (((
750 (OTAA mode, channel added by JoinAccept message)
751 )))
752
753 (((
754
755 )))
756
757 (((
758 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
759 )))
760
761 (((
762 922.2 - SF7BW125 to SF10BW125
763 )))
764
765 (((
766 922.4 - SF7BW125 to SF10BW125
767 )))
768
769 (((
770 922.6 - SF7BW125 to SF10BW125
771 )))
772
773 (((
774 922.8 - SF7BW125 to SF10BW125
775 )))
776
777 (((
778 923.0 - SF7BW125 to SF10BW125
779 )))
780
781 (((
782 922.0 - SF7BW125 to SF10BW125
783 )))
784
785 (((
786
787 )))
788
789 (((
790 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
791 )))
792
793 (((
794 923.6 - SF7BW125 to SF10BW125
795 )))
796
797 (((
798 923.8 - SF7BW125 to SF10BW125
799 )))
800
801 (((
802 924.0 - SF7BW125 to SF10BW125
803 )))
804
805 (((
806 924.2 - SF7BW125 to SF10BW125
807 )))
808
809 (((
810 924.4 - SF7BW125 to SF10BW125
811 )))
812
813 (((
814 924.6 - SF7BW125 to SF10BW125
815 )))
816
817 (((
818
819 )))
820
821 (((
822 (% style="color:blue" %)**Downlink:**
823 )))
824
825 (((
826 Uplink channels 1-8 (RX1)
827 )))
828
829 (((
830 923.2 - SF10BW125 (RX2)
831 )))
832
833
834
835 === 2.6.6  KR920-923 (KR920) ===
836
837 (((
838 (% style="color:blue" %)**Default channel:**
839 )))
840
841 (((
842 922.1 - SF7BW125 to SF12BW125
843 )))
844
845 (((
846 922.3 - SF7BW125 to SF12BW125
847 )))
848
849 (((
850 922.5 - SF7BW125 to SF12BW125
851 )))
852
853 (((
854
855 )))
856
857 (((
858 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
859 )))
860
861 (((
862 922.1 - SF7BW125 to SF12BW125
863 )))
864
865 (((
866 922.3 - SF7BW125 to SF12BW125
867 )))
868
869 (((
870 922.5 - SF7BW125 to SF12BW125
871 )))
872
873 (((
874 922.7 - SF7BW125 to SF12BW125
875 )))
876
877 (((
878 922.9 - SF7BW125 to SF12BW125
879 )))
880
881 (((
882 923.1 - SF7BW125 to SF12BW125
883 )))
884
885 (((
886 923.3 - SF7BW125 to SF12BW125
887 )))
888
889 (((
890
891 )))
892
893 (((
894 (% style="color:blue" %)**Downlink:**
895 )))
896
897 (((
898 Uplink channels 1-7(RX1)
899 )))
900
901 (((
902 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
903 )))
904
905
906
907 === 2.6.7  IN865-867 (IN865) ===
908
909 (((
910 (% style="color:blue" %)**Uplink:**
911 )))
912
913 (((
914 865.0625 - SF7BW125 to SF12BW125
915 )))
916
917 (((
918 865.4025 - SF7BW125 to SF12BW125
919 )))
920
921 (((
922 865.9850 - SF7BW125 to SF12BW125
923 )))
924
925 (((
926
927 )))
928
929 (((
930 (% style="color:blue" %)**Downlink:**
931 )))
932
933 (((
934 Uplink channels 1-3 (RX1)
935 )))
936
937 (((
938 866.550 - SF10BW125 (RX2)
939 )))
940
941
942
943 == 2.7  LED Indicator ==
944
945 The LDDS75 has an internal LED which is to show the status of different state.
946
947
948 * Blink once when device power on.
949 * The device detects the sensor and flashes 5 times.
950 * Solid ON for 5 seconds once device successful Join the network.
951 * Blink once when device transmit a packet.
952
953 == 2.8  ​Firmware Change Log ==
954
955
956 (((
957 **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/]]
958 )))
959
960 (((
961
962 )))
963
964 (((
965 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
966 )))
967
968
969
970 == 2.9  Mechanical ==
971
972
973 [[image:image-20220610172003-1.png]]
974
975
976 [[image:image-20220610172003-2.png]]
977
978
979
980 == 2.10  Battery Analysis ==
981
982 === 2.10.1  Battery Type ===
983
984 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.
985
986
987 The battery related documents as below:
988
989 * (((
990 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
991 )))
992 * (((
993 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
994 )))
995 * (((
996 [[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]]
997 )))
998
999 [[image:image-20220610172400-3.png]]
1000
1001
1002
1003 === 2.10.2  Replace the battery ===
1004
1005 (((
1006 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.
1007 )))
1008
1009 (((
1010
1011 )))
1012
1013 (((
1014 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)
1015 )))
1016
1017
1018
1019 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1020
1021 (((
1022 (((
1023 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1024 )))
1025 )))
1026
1027 * (((
1028 (((
1029 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1030 )))
1031 )))
1032 * (((
1033 (((
1034 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1035 )))
1036 )))
1037
1038 (((
1039 (((
1040
1041 )))
1042
1043 (((
1044 There are two kinds of commands to configure LDDS75, they are:
1045 )))
1046 )))
1047
1048 * (((
1049 (((
1050 (% style="color:#4f81bd" %)** General Commands**.
1051 )))
1052 )))
1053
1054 (((
1055 (((
1056 These commands are to configure:
1057 )))
1058 )))
1059
1060 * (((
1061 (((
1062 General system settings like: uplink interval.
1063 )))
1064 )))
1065 * (((
1066 (((
1067 LoRaWAN protocol & radio related command.
1068 )))
1069 )))
1070
1071 (((
1072 (((
1073 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]]
1074 )))
1075 )))
1076
1077 (((
1078 (((
1079
1080 )))
1081 )))
1082
1083 * (((
1084 (((
1085 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1086 )))
1087 )))
1088
1089 (((
1090 (((
1091 These commands only valid for LDDS75, as below:
1092 )))
1093 )))
1094
1095
1096
1097 == 3.1  Access AT Commands ==
1098
1099 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.
1100
1101 [[image:image-20220610172924-4.png||height="483" width="988"]]
1102
1103
1104 Or if you have below board, use below connection:
1105
1106
1107 [[image:image-20220610172924-5.png]]
1108
1109
1110 (((
1111 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:
1112 )))
1113
1114
1115 [[image:image-20220610172924-6.png||height="601" width="860"]]
1116
1117
1118
1119 == 3.2  Set Transmit Interval Time ==
1120
1121 Feature: Change LoRaWAN End Node Transmit Interval.
1122
1123 (% style="color:#037691" %)**AT Command: AT+TDC**
1124
1125 [[image:image-20220610173409-7.png]]
1126
1127
1128 (((
1129 (% style="color:#037691" %)**Downlink Command: 0x01**
1130 )))
1131
1132 (((
1133 (((
1134 Format: Command Code (0x01) followed by 3 bytes time value.
1135
1136 (((
1137 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1138 )))
1139
1140 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1141 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1142 )))
1143 )))
1144
1145
1146
1147
1148
1149 == 3.3  Set Interrupt Mode ==
1150
1151 Feature, Set Interrupt mode for GPIO_EXIT.
1152
1153 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1154
1155 [[image:image-20220610174917-9.png]]
1156
1157
1158 (% style="color:#037691" %)**Downlink Command: 0x06**
1159
1160 Format: Command Code (0x06) followed by 3 bytes.
1161
1162 (((
1163 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1164 )))
1165
1166 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1167 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1168
1169 = 4.  FAQ =
1170
1171 == 4.1  What is the frequency plan for LDDS75? ==
1172
1173 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"]]
1174
1175
1176
1177 == 4.2  How to change the LoRa Frequency Bands/Region ==
1178
1179 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1180 When downloading the images, choose the required image file for download. ​
1181
1182
1183
1184 == 4.3  Can I use LDDS75 in condensation environment? ==
1185
1186 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1187
1188
1189
1190 = 5.  Trouble Shooting =
1191
1192 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1193
1194 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1195
1196
1197 == 5.2  AT Command input doesn't work ==
1198
1199 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.
1200
1201 (((
1202
1203 )))
1204
1205
1206 = 6.  Order Info =
1207
1208
1209 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1210
1211
1212 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1213
1214 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1215 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1216 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1217 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1218 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1219 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1220 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1221 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1222
1223 (% style="color:blue" %)**YY**(%%): Battery Option
1224
1225 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1226 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1227
1228 = 7. ​ Packing Info =
1229
1230
1231 **Package Includes**:
1232
1233 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1234
1235 **Dimension and weight**:
1236
1237 * Device Size: cm
1238 * Device Weight: g
1239 * Package Size / pcs : cm
1240 * Weight / pcs : g
1241
1242 = 8.  ​Support =
1243
1244 * 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.
1245 * 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]].

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