Version 162.1 by Xiaoling on 2022/06/15 09:10
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
3
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5
6
7 **Table of Contents:**
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14
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 ​ Applications ==
126
127 * Horizontal distance measurement
128 * Liquid level measurement
129 * Parking management system
130 * Object proximity and presence detection
131 * Intelligent trash can management system
132 * Robot obstacle avoidance
133 * Automatic control
134 * Sewer
135 * Bottom water level monitoring
136
137 == 1.6  Pin mapping and power on ==
138
139
140 [[image:1654847583902-256.png]]
141
142
143
144 = 2.  Configure LDDS75 to connect to LoRaWAN network =
145
146 == 2.1  How it works ==
147
148 (((
149 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
150 )))
151
152 (((
153 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.
154 )))
155
156
157
158 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
159
160 (((
161 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.
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163
164 (((
165 [[image:1654848616367-242.png]]
166 )))
167
168 (((
169 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.
170 )))
171
172 (((
173
174
175 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
176 )))
177
178 (((
179 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
180 )))
181
182 [[image:image-20220607170145-1.jpeg]]
183
184
185 (((
186 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
187 )))
188
189 (((
190 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
191 )))
192
193 (((
194
195
196 **Add APP EUI in the application**
197 )))
198
199 [[image:image-20220610161353-4.png]]
200
201 [[image:image-20220610161353-5.png]]
202
203 [[image:image-20220610161353-6.png]]
204
205
206 [[image:image-20220610161353-7.png]]
207
208
209 You can also choose to create the device manually.
210
211 [[image:image-20220610161538-8.png]]
212
213
214
215 **Add APP KEY and DEV EUI**
216
217 [[image:image-20220610161538-9.png]]
218
219
220
221 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
222
223
224 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
225
226 [[image:image-20220610161724-10.png]]
227
228
229 (((
230 (% 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.
231 )))
232
233 [[image:1654849068701-275.png]]
234
235
236
237 == 2.3  ​Uplink Payload ==
238
239 (((
240 (((
241 LDDS75 will uplink payload via LoRaWAN with below payload format: 
242 )))
243
244 (((
245 Uplink payload includes in total 4 bytes.
246 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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248 )))
249
250 (((
251
252 )))
253
254 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
255 |=(% style="width: 62.5px;" %)(((
256 **Size (bytes)**
257 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
258 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
259 [[Distance>>||anchor="H2.3.2A0Distance"]]
260
261 (unit: mm)
262 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
263 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
264 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
265
266 [[image:1654850511545-399.png]]
267
268
269
270 === 2.3.1  Battery Info ===
271
272
273 Check the battery voltage for LDDS75.
274
275 Ex1: 0x0B45 = 2885mV
276
277 Ex2: 0x0B49 = 2889mV
278
279
280
281 === 2.3.2  Distance ===
282
283 (((
284 Get the distance. Flat object range 280mm - 7500mm.
285 )))
286
287 (((
288 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.**
289 )))
290
291
292 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
293 * 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.
294
295 === 2.3.3  Interrupt Pin ===
296
297 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.
298
299 **Example:**
300
301 0x00: Normal uplink packet.
302
303 0x01: Interrupt Uplink Packet.
304
305
306
307 === 2.3.4  DS18B20 Temperature sensor ===
308
309 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
310
311 **Example**:
312
313 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
314
315 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
316
317 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
318
319
320
321 === 2.3.5  Sensor Flag ===
322
323 (((
324 0x01: Detect Ultrasonic Sensor
325 )))
326
327 (((
328 0x00: No Ultrasonic Sensor
329 )))
330
331
332
333 === 2.3.6  Decode payload in The Things Network ===
334
335 While using TTN network, you can add the payload format to decode the payload.
336
337
338 [[image:1654850829385-439.png]]
339
340 The payload decoder function for TTN V3 is here:
341
342 (((
343 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/]]
344 )))
345
346
347
348 == 2.4  Uplink Interval ==
349
350 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"]]
351
352
353
354 == 2.5  ​Show Data in DataCake IoT Server ==
355
356 (((
357 [[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:
358 )))
359
360 (((
361
362 )))
363
364 (((
365 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
366 )))
367
368 (((
369 (% 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:**
370 )))
371
372
373 [[image:1654592790040-760.png]]
374
375
376 [[image:1654592800389-571.png]]
377
378
379 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
380
381 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
382
383 [[image:1654851029373-510.png]]
384
385
386 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
387
388 [[image:image-20220610165129-11.png||height="595" width="1088"]]
389
390
391
392 == 2.6  Frequency Plans ==
393
394 (((
395 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.
396 )))
397
398
399
400 === 2.6.1  EU863-870 (EU868) ===
401
402 (((
403 (% style="color:blue" %)**Uplink:**
404 )))
405
406 (((
407 868.1 - SF7BW125 to SF12BW125
408 )))
409
410 (((
411 868.3 - SF7BW125 to SF12BW125 and SF7BW250
412 )))
413
414 (((
415 868.5 - SF7BW125 to SF12BW125
416 )))
417
418 (((
419 867.1 - SF7BW125 to SF12BW125
420 )))
421
422 (((
423 867.3 - SF7BW125 to SF12BW125
424 )))
425
426 (((
427 867.5 - SF7BW125 to SF12BW125
428 )))
429
430 (((
431 867.7 - SF7BW125 to SF12BW125
432 )))
433
434 (((
435 867.9 - SF7BW125 to SF12BW125
436 )))
437
438 (((
439 868.8 - FSK
440 )))
441
442 (((
443
444 )))
445
446 (((
447 (% style="color:blue" %)**Downlink:**
448 )))
449
450 (((
451 Uplink channels 1-9 (RX1)
452 )))
453
454 (((
455 869.525 - SF9BW125 (RX2 downlink only)
456 )))
457
458
459
460 === 2.6.2  US902-928(US915) ===
461
462 (((
463 Used in USA, Canada and South America. Default use CHE=2
464
465 (% style="color:blue" %)**Uplink:**
466
467 903.9 - SF7BW125 to SF10BW125
468
469 904.1 - SF7BW125 to SF10BW125
470
471 904.3 - SF7BW125 to SF10BW125
472
473 904.5 - SF7BW125 to SF10BW125
474
475 904.7 - SF7BW125 to SF10BW125
476
477 904.9 - SF7BW125 to SF10BW125
478
479 905.1 - SF7BW125 to SF10BW125
480
481 905.3 - SF7BW125 to SF10BW125
482
483
484 (% style="color:blue" %)**Downlink:**
485
486 923.3 - SF7BW500 to SF12BW500
487
488 923.9 - SF7BW500 to SF12BW500
489
490 924.5 - SF7BW500 to SF12BW500
491
492 925.1 - SF7BW500 to SF12BW500
493
494 925.7 - SF7BW500 to SF12BW500
495
496 926.3 - SF7BW500 to SF12BW500
497
498 926.9 - SF7BW500 to SF12BW500
499
500 927.5 - SF7BW500 to SF12BW500
501
502 923.3 - SF12BW500(RX2 downlink only)
503
504
505
506 )))
507
508 === 2.6.3  CN470-510 (CN470) ===
509
510 (((
511 Used in China, Default use CHE=1
512 )))
513
514 (((
515 (% style="color:blue" %)**Uplink:**
516 )))
517
518 (((
519 486.3 - SF7BW125 to SF12BW125
520 )))
521
522 (((
523 486.5 - SF7BW125 to SF12BW125
524 )))
525
526 (((
527 486.7 - SF7BW125 to SF12BW125
528 )))
529
530 (((
531 486.9 - SF7BW125 to SF12BW125
532 )))
533
534 (((
535 487.1 - SF7BW125 to SF12BW125
536 )))
537
538 (((
539 487.3 - SF7BW125 to SF12BW125
540 )))
541
542 (((
543 487.5 - SF7BW125 to SF12BW125
544 )))
545
546 (((
547 487.7 - SF7BW125 to SF12BW125
548 )))
549
550 (((
551
552 )))
553
554 (((
555 (% style="color:blue" %)**Downlink:**
556 )))
557
558 (((
559 506.7 - SF7BW125 to SF12BW125
560 )))
561
562 (((
563 506.9 - SF7BW125 to SF12BW125
564 )))
565
566 (((
567 507.1 - SF7BW125 to SF12BW125
568 )))
569
570 (((
571 507.3 - SF7BW125 to SF12BW125
572 )))
573
574 (((
575 507.5 - SF7BW125 to SF12BW125
576 )))
577
578 (((
579 507.7 - SF7BW125 to SF12BW125
580 )))
581
582 (((
583 507.9 - SF7BW125 to SF12BW125
584 )))
585
586 (((
587 508.1 - SF7BW125 to SF12BW125
588 )))
589
590 (((
591 505.3 - SF12BW125 (RX2 downlink only)
592 )))
593
594
595
596 === 2.6.4  AU915-928(AU915) ===
597
598 (((
599 Default use CHE=2
600
601 (% style="color:blue" %)**Uplink:**
602
603 916.8 - SF7BW125 to SF12BW125
604
605 917.0 - SF7BW125 to SF12BW125
606
607 917.2 - SF7BW125 to SF12BW125
608
609 917.4 - SF7BW125 to SF12BW125
610
611 917.6 - SF7BW125 to SF12BW125
612
613 917.8 - SF7BW125 to SF12BW125
614
615 918.0 - SF7BW125 to SF12BW125
616
617 918.2 - SF7BW125 to SF12BW125
618
619
620 (% style="color:blue" %)**Downlink:**
621
622 923.3 - SF7BW500 to SF12BW500
623
624 923.9 - SF7BW500 to SF12BW500
625
626 924.5 - SF7BW500 to SF12BW500
627
628 925.1 - SF7BW500 to SF12BW500
629
630 925.7 - SF7BW500 to SF12BW500
631
632 926.3 - SF7BW500 to SF12BW500
633
634 926.9 - SF7BW500 to SF12BW500
635
636 927.5 - SF7BW500 to SF12BW500
637
638 923.3 - SF12BW500(RX2 downlink only)
639
640
641
642 )))
643
644 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
645
646 (((
647 (% style="color:blue" %)**Default Uplink channel:**
648 )))
649
650 (((
651 923.2 - SF7BW125 to SF10BW125
652 )))
653
654 (((
655 923.4 - SF7BW125 to SF10BW125
656 )))
657
658 (((
659
660 )))
661
662 (((
663 (% style="color:blue" %)**Additional Uplink Channel**:
664 )))
665
666 (((
667 (OTAA mode, channel added by JoinAccept message)
668 )))
669
670 (((
671
672 )))
673
674 (((
675 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
676 )))
677
678 (((
679 922.2 - SF7BW125 to SF10BW125
680 )))
681
682 (((
683 922.4 - SF7BW125 to SF10BW125
684 )))
685
686 (((
687 922.6 - SF7BW125 to SF10BW125
688 )))
689
690 (((
691 922.8 - SF7BW125 to SF10BW125
692 )))
693
694 (((
695 923.0 - SF7BW125 to SF10BW125
696 )))
697
698 (((
699 922.0 - SF7BW125 to SF10BW125
700 )))
701
702 (((
703
704 )))
705
706 (((
707 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
708 )))
709
710 (((
711 923.6 - SF7BW125 to SF10BW125
712 )))
713
714 (((
715 923.8 - SF7BW125 to SF10BW125
716 )))
717
718 (((
719 924.0 - SF7BW125 to SF10BW125
720 )))
721
722 (((
723 924.2 - SF7BW125 to SF10BW125
724 )))
725
726 (((
727 924.4 - SF7BW125 to SF10BW125
728 )))
729
730 (((
731 924.6 - SF7BW125 to SF10BW125
732 )))
733
734 (((
735
736 )))
737
738 (((
739 (% style="color:blue" %)**Downlink:**
740 )))
741
742 (((
743 Uplink channels 1-8 (RX1)
744 )))
745
746 (((
747 923.2 - SF10BW125 (RX2)
748 )))
749
750
751
752 === 2.6.6  KR920-923 (KR920) ===
753
754 (((
755 (% style="color:blue" %)**Default channel:**
756 )))
757
758 (((
759 922.1 - SF7BW125 to SF12BW125
760 )))
761
762 (((
763 922.3 - SF7BW125 to SF12BW125
764 )))
765
766 (((
767 922.5 - SF7BW125 to SF12BW125
768 )))
769
770 (((
771
772 )))
773
774 (((
775 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
776 )))
777
778 (((
779 922.1 - SF7BW125 to SF12BW125
780 )))
781
782 (((
783 922.3 - SF7BW125 to SF12BW125
784 )))
785
786 (((
787 922.5 - SF7BW125 to SF12BW125
788 )))
789
790 (((
791 922.7 - SF7BW125 to SF12BW125
792 )))
793
794 (((
795 922.9 - SF7BW125 to SF12BW125
796 )))
797
798 (((
799 923.1 - SF7BW125 to SF12BW125
800 )))
801
802 (((
803 923.3 - SF7BW125 to SF12BW125
804 )))
805
806 (((
807
808 )))
809
810 (((
811 (% style="color:blue" %)**Downlink:**
812 )))
813
814 (((
815 Uplink channels 1-7(RX1)
816 )))
817
818 (((
819 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
820 )))
821
822
823
824 === 2.6.7  IN865-867 (IN865) ===
825
826 (((
827 (% style="color:blue" %)**Uplink:**
828 )))
829
830 (((
831 865.0625 - SF7BW125 to SF12BW125
832 )))
833
834 (((
835 865.4025 - SF7BW125 to SF12BW125
836 )))
837
838 (((
839 865.9850 - SF7BW125 to SF12BW125
840 )))
841
842 (((
843
844 )))
845
846 (((
847 (% style="color:blue" %)**Downlink:**
848 )))
849
850 (((
851 Uplink channels 1-3 (RX1)
852 )))
853
854 (((
855 866.550 - SF10BW125 (RX2)
856 )))
857
858
859
860 == 2.7  LED Indicator ==
861
862 The LDDS75 has an internal LED which is to show the status of different state.
863
864
865 * Blink once when device power on.
866 * The device detects the sensor and flashes 5 times.
867 * Solid ON for 5 seconds once device successful Join the network.
868 * Blink once when device transmit a packet.
869
870 == 2.8  ​Firmware Change Log ==
871
872
873 (((
874 **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/]]
875 )))
876
877 (((
878
879 )))
880
881 (((
882 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
883 )))
884
885
886
887 == 2.9  Mechanical ==
888
889
890 [[image:image-20220610172003-1.png]]
891
892
893 [[image:image-20220610172003-2.png]]
894
895
896
897 == 2.10  Battery Analysis ==
898
899 === 2.10.1  Battery Type ===
900
901 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.
902
903
904 The battery related documents as below:
905
906 * (((
907 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
908 )))
909 * (((
910 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
911 )))
912 * (((
913 [[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]]
914 )))
915
916 [[image:image-20220610172400-3.png]]
917
918
919
920 === 2.10.2  Replace the battery ===
921
922 (((
923 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.
924 )))
925
926 (((
927
928 )))
929
930 (((
931 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)
932 )))
933
934
935
936 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
937
938 (((
939 (((
940 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
941 )))
942 )))
943
944 * (((
945 (((
946 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
947 )))
948 )))
949 * (((
950 (((
951 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
952 )))
953 )))
954
955 (((
956 (((
957
958 )))
959
960 (((
961 There are two kinds of commands to configure LDDS75, they are:
962 )))
963 )))
964
965 * (((
966 (((
967 (% style="color:#4f81bd" %)** General Commands**.
968 )))
969 )))
970
971 (((
972 (((
973 These commands are to configure:
974 )))
975 )))
976
977 * (((
978 (((
979 General system settings like: uplink interval.
980 )))
981 )))
982 * (((
983 (((
984 LoRaWAN protocol & radio related command.
985 )))
986 )))
987
988 (((
989 (((
990 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]]
991 )))
992 )))
993
994 (((
995 (((
996
997 )))
998 )))
999
1000 * (((
1001 (((
1002 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1003 )))
1004 )))
1005
1006 (((
1007 (((
1008 These commands only valid for LDDS75, as below:
1009 )))
1010 )))
1011
1012
1013
1014 == 3.1  Access AT Commands ==
1015
1016 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.
1017
1018 [[image:image-20220610172924-4.png||height="483" width="988"]]
1019
1020
1021 Or if you have below board, use below connection:
1022
1023
1024 [[image:image-20220610172924-5.png]]
1025
1026
1027 (((
1028 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:
1029 )))
1030
1031
1032 [[image:image-20220610172924-6.png||height="601" width="860"]]
1033
1034
1035
1036 == 3.2  Set Transmit Interval Time ==
1037
1038 Feature: Change LoRaWAN End Node Transmit Interval.
1039
1040 (% style="color:#037691" %)**AT Command: AT+TDC**
1041
1042 [[image:image-20220610173409-7.png]]
1043
1044
1045 (((
1046 (% style="color:#037691" %)**Downlink Command: 0x01**
1047 )))
1048
1049 (((
1050 (((
1051 Format: Command Code (0x01) followed by 3 bytes time value.
1052
1053 (((
1054 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1055 )))
1056
1057 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1058 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1059 )))
1060 )))
1061
1062
1063
1064
1065
1066 == 3.3  Set Interrupt Mode ==
1067
1068 Feature, Set Interrupt mode for GPIO_EXIT.
1069
1070 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1071
1072 [[image:image-20220610174917-9.png]]
1073
1074
1075 (% style="color:#037691" %)**Downlink Command: 0x06**
1076
1077 Format: Command Code (0x06) followed by 3 bytes.
1078
1079 (((
1080 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1081 )))
1082
1083 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1084 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1085
1086 = 4.  FAQ =
1087
1088 == 4.1  What is the frequency plan for LDDS75? ==
1089
1090 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"]]
1091
1092
1093
1094 == 4.2  How to change the LoRa Frequency Bands/Region ==
1095
1096 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1097 When downloading the images, choose the required image file for download. ​
1098
1099
1100
1101 == 4.3  Can I use LDDS75 in condensation environment? ==
1102
1103 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1104
1105
1106
1107 = 5.  Trouble Shooting =
1108
1109 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1110
1111 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1112
1113
1114 == 5.2  AT Command input doesn't work ==
1115
1116 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.
1117
1118 (((
1119
1120 )))
1121
1122
1123 = 6.  Order Info =
1124
1125
1126 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1127
1128
1129 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1130
1131 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1132 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1133 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1134 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1135 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1136 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1137 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1138 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1139
1140 (% style="color:blue" %)**YY**(%%): Battery Option
1141
1142 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1143 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1144
1145 = 7. ​ Packing Info =
1146
1147
1148 **Package Includes**:
1149
1150 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1151
1152 **Dimension and weight**:
1153
1154 * Device Size: cm
1155 * Device Weight: g
1156 * Package Size / pcs : cm
1157 * Weight / pcs : g
1158
1159 = 8.  ​Support =
1160
1161 * 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.
1162 * 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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