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Version 169.5 by Xiaoling on 2022/06/15 09:34
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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 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
154
155
156 After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
157
158
159 (% style="color:red" %)**LED Status:**
160
161 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
162
163 * (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
164 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
165
166 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
167
168
169 (% style="color:red" %)**Note 2:**
170
171 (% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
172
173
174 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175
176
177 Prepare Eproxy AB glue.
178
179 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
180
181 Reset LDDS20 and see if the BLUE LED is slowly blinking.
182
183 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
184
185 (% style="color:red" %)**Note 1:**
186
187 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
188
189
190 (% style="color:red" %)**Note 2:**
191
192 (% style="color:red" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
193
194
195
196
197
198
199 == 1.5 ​ Applications ==
200
201 * Horizontal distance measurement
202 * Liquid level measurement
203 * Parking management system
204 * Object proximity and presence detection
205 * Intelligent trash can management system
206 * Robot obstacle avoidance
207 * Automatic control
208 * Sewer
209 * Bottom water level monitoring
210
211 == 1.6  Pin mapping and power on ==
212
213
214 [[image:1654847583902-256.png]]
215
216
217
218 = 2.  Configure LDDS75 to connect to LoRaWAN network =
219
220 == 2.1  How it works ==
221
222 (((
223 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
224 )))
225
226 (((
227 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.
228 )))
229
230
231
232 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
233
234 (((
235 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.
236 )))
237
238 (((
239 [[image:1654848616367-242.png]]
240 )))
241
242 (((
243 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.
244 )))
245
246 (((
247
248
249 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
250 )))
251
252 (((
253 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
254 )))
255
256 [[image:image-20220607170145-1.jpeg]]
257
258
259 (((
260 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
261 )))
262
263 (((
264 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
265 )))
266
267 (((
268
269
270 **Add APP EUI in the application**
271 )))
272
273 [[image:image-20220610161353-4.png]]
274
275 [[image:image-20220610161353-5.png]]
276
277 [[image:image-20220610161353-6.png]]
278
279
280 [[image:image-20220610161353-7.png]]
281
282
283 You can also choose to create the device manually.
284
285 [[image:image-20220610161538-8.png]]
286
287
288
289 **Add APP KEY and DEV EUI**
290
291 [[image:image-20220610161538-9.png]]
292
293
294
295 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
296
297
298 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
299
300 [[image:image-20220610161724-10.png]]
301
302
303 (((
304 (% 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.
305 )))
306
307 [[image:1654849068701-275.png]]
308
309
310
311 == 2.3  ​Uplink Payload ==
312
313 (((
314 (((
315 LDDS75 will uplink payload via LoRaWAN with below payload format: 
316 )))
317
318 (((
319 Uplink payload includes in total 4 bytes.
320 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
321 )))
322 )))
323
324 (((
325
326 )))
327
328 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
329 |=(% style="width: 62.5px;" %)(((
330 **Size (bytes)**
331 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
332 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
333 [[Distance>>||anchor="H2.3.2A0Distance"]]
334
335 (unit: mm)
336 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
337 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
338 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
339
340 [[image:1654850511545-399.png]]
341
342
343
344 === 2.3.1  Battery Info ===
345
346
347 Check the battery voltage for LDDS75.
348
349 Ex1: 0x0B45 = 2885mV
350
351 Ex2: 0x0B49 = 2889mV
352
353
354
355 === 2.3.2  Distance ===
356
357 (((
358 Get the distance. Flat object range 280mm - 7500mm.
359 )))
360
361 (((
362 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.**
363 )))
364
365
366 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
367 * 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.
368
369 === 2.3.3  Interrupt Pin ===
370
371 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.
372
373 **Example:**
374
375 0x00: Normal uplink packet.
376
377 0x01: Interrupt Uplink Packet.
378
379
380
381 === 2.3.4  DS18B20 Temperature sensor ===
382
383 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
384
385 **Example**:
386
387 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
388
389 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
390
391 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
392
393
394
395 === 2.3.5  Sensor Flag ===
396
397 (((
398 0x01: Detect Ultrasonic Sensor
399 )))
400
401 (((
402 0x00: No Ultrasonic Sensor
403 )))
404
405
406
407 === 2.3.6  Decode payload in The Things Network ===
408
409 While using TTN network, you can add the payload format to decode the payload.
410
411
412 [[image:1654850829385-439.png]]
413
414 The payload decoder function for TTN V3 is here:
415
416 (((
417 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/]]
418 )))
419
420
421
422 == 2.4  Uplink Interval ==
423
424 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"]]
425
426
427
428 == 2.5  ​Show Data in DataCake IoT Server ==
429
430 (((
431 [[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:
432 )))
433
434 (((
435
436 )))
437
438 (((
439 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
440 )))
441
442 (((
443 (% 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:**
444 )))
445
446
447 [[image:1654592790040-760.png]]
448
449
450 [[image:1654592800389-571.png]]
451
452
453 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
454
455 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
456
457 [[image:1654851029373-510.png]]
458
459
460 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
461
462 [[image:image-20220610165129-11.png||height="595" width="1088"]]
463
464
465
466 == 2.6  Frequency Plans ==
467
468 (((
469 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.
470 )))
471
472
473
474 === 2.6.1  EU863-870 (EU868) ===
475
476 (((
477 (% style="color:blue" %)**Uplink:**
478 )))
479
480 (((
481 868.1 - SF7BW125 to SF12BW125
482 )))
483
484 (((
485 868.3 - SF7BW125 to SF12BW125 and SF7BW250
486 )))
487
488 (((
489 868.5 - SF7BW125 to SF12BW125
490 )))
491
492 (((
493 867.1 - SF7BW125 to SF12BW125
494 )))
495
496 (((
497 867.3 - SF7BW125 to SF12BW125
498 )))
499
500 (((
501 867.5 - SF7BW125 to SF12BW125
502 )))
503
504 (((
505 867.7 - SF7BW125 to SF12BW125
506 )))
507
508 (((
509 867.9 - SF7BW125 to SF12BW125
510 )))
511
512 (((
513 868.8 - FSK
514 )))
515
516 (((
517
518 )))
519
520 (((
521 (% style="color:blue" %)**Downlink:**
522 )))
523
524 (((
525 Uplink channels 1-9 (RX1)
526 )))
527
528 (((
529 869.525 - SF9BW125 (RX2 downlink only)
530 )))
531
532
533
534 === 2.6.2  US902-928(US915) ===
535
536 (((
537 Used in USA, Canada and South America. Default use CHE=2
538
539 (% style="color:blue" %)**Uplink:**
540
541 903.9 - SF7BW125 to SF10BW125
542
543 904.1 - SF7BW125 to SF10BW125
544
545 904.3 - SF7BW125 to SF10BW125
546
547 904.5 - SF7BW125 to SF10BW125
548
549 904.7 - SF7BW125 to SF10BW125
550
551 904.9 - SF7BW125 to SF10BW125
552
553 905.1 - SF7BW125 to SF10BW125
554
555 905.3 - SF7BW125 to SF10BW125
556
557
558 (% style="color:blue" %)**Downlink:**
559
560 923.3 - SF7BW500 to SF12BW500
561
562 923.9 - SF7BW500 to SF12BW500
563
564 924.5 - SF7BW500 to SF12BW500
565
566 925.1 - SF7BW500 to SF12BW500
567
568 925.7 - SF7BW500 to SF12BW500
569
570 926.3 - SF7BW500 to SF12BW500
571
572 926.9 - SF7BW500 to SF12BW500
573
574 927.5 - SF7BW500 to SF12BW500
575
576 923.3 - SF12BW500(RX2 downlink only)
577
578
579
580 )))
581
582 === 2.6.3  CN470-510 (CN470) ===
583
584 (((
585 Used in China, Default use CHE=1
586 )))
587
588 (((
589 (% style="color:blue" %)**Uplink:**
590 )))
591
592 (((
593 486.3 - SF7BW125 to SF12BW125
594 )))
595
596 (((
597 486.5 - SF7BW125 to SF12BW125
598 )))
599
600 (((
601 486.7 - SF7BW125 to SF12BW125
602 )))
603
604 (((
605 486.9 - SF7BW125 to SF12BW125
606 )))
607
608 (((
609 487.1 - SF7BW125 to SF12BW125
610 )))
611
612 (((
613 487.3 - SF7BW125 to SF12BW125
614 )))
615
616 (((
617 487.5 - SF7BW125 to SF12BW125
618 )))
619
620 (((
621 487.7 - SF7BW125 to SF12BW125
622 )))
623
624 (((
625
626 )))
627
628 (((
629 (% style="color:blue" %)**Downlink:**
630 )))
631
632 (((
633 506.7 - SF7BW125 to SF12BW125
634 )))
635
636 (((
637 506.9 - SF7BW125 to SF12BW125
638 )))
639
640 (((
641 507.1 - SF7BW125 to SF12BW125
642 )))
643
644 (((
645 507.3 - SF7BW125 to SF12BW125
646 )))
647
648 (((
649 507.5 - SF7BW125 to SF12BW125
650 )))
651
652 (((
653 507.7 - SF7BW125 to SF12BW125
654 )))
655
656 (((
657 507.9 - SF7BW125 to SF12BW125
658 )))
659
660 (((
661 508.1 - SF7BW125 to SF12BW125
662 )))
663
664 (((
665 505.3 - SF12BW125 (RX2 downlink only)
666 )))
667
668
669
670 === 2.6.4  AU915-928(AU915) ===
671
672 (((
673 Default use CHE=2
674
675 (% style="color:blue" %)**Uplink:**
676
677 916.8 - SF7BW125 to SF12BW125
678
679 917.0 - SF7BW125 to SF12BW125
680
681 917.2 - SF7BW125 to SF12BW125
682
683 917.4 - SF7BW125 to SF12BW125
684
685 917.6 - SF7BW125 to SF12BW125
686
687 917.8 - SF7BW125 to SF12BW125
688
689 918.0 - SF7BW125 to SF12BW125
690
691 918.2 - SF7BW125 to SF12BW125
692
693
694 (% style="color:blue" %)**Downlink:**
695
696 923.3 - SF7BW500 to SF12BW500
697
698 923.9 - SF7BW500 to SF12BW500
699
700 924.5 - SF7BW500 to SF12BW500
701
702 925.1 - SF7BW500 to SF12BW500
703
704 925.7 - SF7BW500 to SF12BW500
705
706 926.3 - SF7BW500 to SF12BW500
707
708 926.9 - SF7BW500 to SF12BW500
709
710 927.5 - SF7BW500 to SF12BW500
711
712 923.3 - SF12BW500(RX2 downlink only)
713
714
715
716 )))
717
718 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
719
720 (((
721 (% style="color:blue" %)**Default Uplink channel:**
722 )))
723
724 (((
725 923.2 - SF7BW125 to SF10BW125
726 )))
727
728 (((
729 923.4 - SF7BW125 to SF10BW125
730 )))
731
732 (((
733
734 )))
735
736 (((
737 (% style="color:blue" %)**Additional Uplink Channel**:
738 )))
739
740 (((
741 (OTAA mode, channel added by JoinAccept message)
742 )))
743
744 (((
745
746 )))
747
748 (((
749 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
750 )))
751
752 (((
753 922.2 - SF7BW125 to SF10BW125
754 )))
755
756 (((
757 922.4 - SF7BW125 to SF10BW125
758 )))
759
760 (((
761 922.6 - SF7BW125 to SF10BW125
762 )))
763
764 (((
765 922.8 - SF7BW125 to SF10BW125
766 )))
767
768 (((
769 923.0 - SF7BW125 to SF10BW125
770 )))
771
772 (((
773 922.0 - SF7BW125 to SF10BW125
774 )))
775
776 (((
777
778 )))
779
780 (((
781 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
782 )))
783
784 (((
785 923.6 - SF7BW125 to SF10BW125
786 )))
787
788 (((
789 923.8 - SF7BW125 to SF10BW125
790 )))
791
792 (((
793 924.0 - SF7BW125 to SF10BW125
794 )))
795
796 (((
797 924.2 - SF7BW125 to SF10BW125
798 )))
799
800 (((
801 924.4 - SF7BW125 to SF10BW125
802 )))
803
804 (((
805 924.6 - SF7BW125 to SF10BW125
806 )))
807
808 (((
809
810 )))
811
812 (((
813 (% style="color:blue" %)**Downlink:**
814 )))
815
816 (((
817 Uplink channels 1-8 (RX1)
818 )))
819
820 (((
821 923.2 - SF10BW125 (RX2)
822 )))
823
824
825
826 === 2.6.6  KR920-923 (KR920) ===
827
828 (((
829 (% style="color:blue" %)**Default channel:**
830 )))
831
832 (((
833 922.1 - SF7BW125 to SF12BW125
834 )))
835
836 (((
837 922.3 - SF7BW125 to SF12BW125
838 )))
839
840 (((
841 922.5 - SF7BW125 to SF12BW125
842 )))
843
844 (((
845
846 )))
847
848 (((
849 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
850 )))
851
852 (((
853 922.1 - SF7BW125 to SF12BW125
854 )))
855
856 (((
857 922.3 - SF7BW125 to SF12BW125
858 )))
859
860 (((
861 922.5 - SF7BW125 to SF12BW125
862 )))
863
864 (((
865 922.7 - SF7BW125 to SF12BW125
866 )))
867
868 (((
869 922.9 - SF7BW125 to SF12BW125
870 )))
871
872 (((
873 923.1 - SF7BW125 to SF12BW125
874 )))
875
876 (((
877 923.3 - SF7BW125 to SF12BW125
878 )))
879
880 (((
881
882 )))
883
884 (((
885 (% style="color:blue" %)**Downlink:**
886 )))
887
888 (((
889 Uplink channels 1-7(RX1)
890 )))
891
892 (((
893 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
894 )))
895
896
897
898 === 2.6.7  IN865-867 (IN865) ===
899
900 (((
901 (% style="color:blue" %)**Uplink:**
902 )))
903
904 (((
905 865.0625 - SF7BW125 to SF12BW125
906 )))
907
908 (((
909 865.4025 - SF7BW125 to SF12BW125
910 )))
911
912 (((
913 865.9850 - SF7BW125 to SF12BW125
914 )))
915
916 (((
917
918 )))
919
920 (((
921 (% style="color:blue" %)**Downlink:**
922 )))
923
924 (((
925 Uplink channels 1-3 (RX1)
926 )))
927
928 (((
929 866.550 - SF10BW125 (RX2)
930 )))
931
932
933
934 == 2.7  LED Indicator ==
935
936 The LDDS75 has an internal LED which is to show the status of different state.
937
938
939 * Blink once when device power on.
940 * The device detects the sensor and flashes 5 times.
941 * Solid ON for 5 seconds once device successful Join the network.
942 * Blink once when device transmit a packet.
943
944 == 2.8  ​Firmware Change Log ==
945
946
947 (((
948 **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/]]
949 )))
950
951 (((
952
953 )))
954
955 (((
956 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
957 )))
958
959
960
961 == 2.9  Mechanical ==
962
963
964 [[image:image-20220610172003-1.png]]
965
966
967 [[image:image-20220610172003-2.png]]
968
969
970
971 == 2.10  Battery Analysis ==
972
973 === 2.10.1  Battery Type ===
974
975 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.
976
977
978 The battery related documents as below:
979
980 * (((
981 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
982 )))
983 * (((
984 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
985 )))
986 * (((
987 [[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]]
988 )))
989
990 [[image:image-20220610172400-3.png]]
991
992
993
994 === 2.10.2  Replace the battery ===
995
996 (((
997 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.
998 )))
999
1000 (((
1001
1002 )))
1003
1004 (((
1005 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)
1006 )))
1007
1008
1009
1010 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1011
1012 (((
1013 (((
1014 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1015 )))
1016 )))
1017
1018 * (((
1019 (((
1020 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1021 )))
1022 )))
1023 * (((
1024 (((
1025 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1026 )))
1027 )))
1028
1029 (((
1030 (((
1031
1032 )))
1033
1034 (((
1035 There are two kinds of commands to configure LDDS75, they are:
1036 )))
1037 )))
1038
1039 * (((
1040 (((
1041 (% style="color:#4f81bd" %)** General Commands**.
1042 )))
1043 )))
1044
1045 (((
1046 (((
1047 These commands are to configure:
1048 )))
1049 )))
1050
1051 * (((
1052 (((
1053 General system settings like: uplink interval.
1054 )))
1055 )))
1056 * (((
1057 (((
1058 LoRaWAN protocol & radio related command.
1059 )))
1060 )))
1061
1062 (((
1063 (((
1064 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]]
1065 )))
1066 )))
1067
1068 (((
1069 (((
1070
1071 )))
1072 )))
1073
1074 * (((
1075 (((
1076 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1077 )))
1078 )))
1079
1080 (((
1081 (((
1082 These commands only valid for LDDS75, as below:
1083 )))
1084 )))
1085
1086
1087
1088 == 3.1  Access AT Commands ==
1089
1090 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.
1091
1092 [[image:image-20220610172924-4.png||height="483" width="988"]]
1093
1094
1095 Or if you have below board, use below connection:
1096
1097
1098 [[image:image-20220610172924-5.png]]
1099
1100
1101 (((
1102 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:
1103 )))
1104
1105
1106 [[image:image-20220610172924-6.png||height="601" width="860"]]
1107
1108
1109
1110 == 3.2  Set Transmit Interval Time ==
1111
1112 Feature: Change LoRaWAN End Node Transmit Interval.
1113
1114 (% style="color:#037691" %)**AT Command: AT+TDC**
1115
1116 [[image:image-20220610173409-7.png]]
1117
1118
1119 (((
1120 (% style="color:#037691" %)**Downlink Command: 0x01**
1121 )))
1122
1123 (((
1124 (((
1125 Format: Command Code (0x01) followed by 3 bytes time value.
1126
1127 (((
1128 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1129 )))
1130
1131 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1132 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1133 )))
1134 )))
1135
1136
1137
1138
1139
1140 == 3.3  Set Interrupt Mode ==
1141
1142 Feature, Set Interrupt mode for GPIO_EXIT.
1143
1144 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1145
1146 [[image:image-20220610174917-9.png]]
1147
1148
1149 (% style="color:#037691" %)**Downlink Command: 0x06**
1150
1151 Format: Command Code (0x06) followed by 3 bytes.
1152
1153 (((
1154 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1155 )))
1156
1157 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1158 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1159
1160 = 4.  FAQ =
1161
1162 == 4.1  What is the frequency plan for LDDS75? ==
1163
1164 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"]]
1165
1166
1167
1168 == 4.2  How to change the LoRa Frequency Bands/Region ==
1169
1170 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1171 When downloading the images, choose the required image file for download. ​
1172
1173
1174
1175 == 4.3  Can I use LDDS75 in condensation environment? ==
1176
1177 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1178
1179
1180
1181 = 5.  Trouble Shooting =
1182
1183 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1184
1185 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1186
1187
1188 == 5.2  AT Command input doesn't work ==
1189
1190 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.
1191
1192 (((
1193
1194 )))
1195
1196
1197 = 6.  Order Info =
1198
1199
1200 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1201
1202
1203 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1204
1205 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1206 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1207 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1208 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1209 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1210 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1211 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1212 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1213
1214 (% style="color:blue" %)**YY**(%%): Battery Option
1215
1216 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1217 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1218
1219 = 7. ​ Packing Info =
1220
1221
1222 **Package Includes**:
1223
1224 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1225
1226 **Dimension and weight**:
1227
1228 * Device Size: cm
1229 * Device Weight: g
1230 * Package Size / pcs : cm
1231 * Weight / pcs : g
1232
1233 = 8.  ​Support =
1234
1235 * 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.
1236 * 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]].