Skip to Content
Version 150.49 by Xiaoling on 2022/06/11 09:18
Show last authors
1 (% style="text-align:center" %)
2 [[image:1654846127817-788.png]]
3
4 **Contents:**
5
6 {{toc/}}
7
8
9
10
11
12
13
14
15 = 1.  Introduction =
16
17 == 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
18
19 (((
20
21
22 (((
23 (((
24 The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
25 )))
26
27 (((
28
29 )))
30
31 (((
32 It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
33 )))
34
35 (((
36
37 )))
38
39 (((
40 The LoRa wireless technology used in LDDS75 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.
41 )))
42
43 (((
44
45 )))
46
47 (((
48 LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
49 )))
50
51 (((
52
53 )))
54
55 (((
56 Each LDDS75 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.
57 )))
58
59 (((
60
61 )))
62
63 (((
64 (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
65 )))
66 )))
67 )))
68
69
70 [[image:1654847051249-359.png]]
71
72
73
74 == ​1.2  Features ==
75
76 * LoRaWAN 1.0.3 Class A
77 * Ultra low power consumption
78 * Distance Detection by Ultrasonic technology
79 * Flat object range 280mm - 7500mm
80 * Accuracy: ±(1cm+S*0.3%) (S: Distance)
81 * Cable Length : 25cm
82 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
83 * AT Commands to change parameters
84 * Uplink on periodically
85 * Downlink to change configure
86 * IP66 Waterproof Enclosure
87 * 4000mAh or 8500mAh Battery for long term use
88
89
90 == 1.3  Specification ==
91
92 === 1.3.1  Rated environmental conditions ===
93
94 [[image:image-20220610154839-1.png]]
95
96 (((
97 **Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
98 )))
99
100
101
102 === 1.3.2  Effective measurement range Reference beam pattern ===
103
104 **(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
105
106
107
108 [[image:1654852253176-749.png]]
109
110
111
112 (((
113 **(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
114 )))
115
116
117 [[image:1654852175653-550.png]](% style="display:none" %) ** **
118
119
120
121 == 1.5 ​ Applications ==
122
123 * Horizontal distance measurement
124 * Liquid level measurement
125 * Parking management system
126 * Object proximity and presence detection
127 * Intelligent trash can management system
128 * Robot obstacle avoidance
129 * Automatic control
130 * Sewer
131 * Bottom water level monitoring
132
133
134
135 == 1.6  Pin mapping and power on ==
136
137
138 [[image:1654847583902-256.png]]
139
140
141
142 = 2.  Configure LDDS75 to connect to LoRaWAN network =
143
144 == 2.1  How it works ==
145
146 (((
147 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
148 )))
149
150 (((
151 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.
152 )))
153
154
155
156 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
157
158 (((
159 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.
160 )))
161
162 (((
163 [[image:1654848616367-242.png]]
164 )))
165
166 (((
167 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.
168 )))
169
170 (((
171 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
172 )))
173
174 (((
175 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
176 )))
177
178 [[image:image-20220607170145-1.jpeg]]
179
180
181 (((
182 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
183 )))
184
185 (((
186 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
187 )))
188
189 (((
190 **Add APP EUI in the application**
191 )))
192
193 [[image:image-20220610161353-4.png]]
194
195 [[image:image-20220610161353-5.png]]
196
197 [[image:image-20220610161353-6.png]]
198
199
200 [[image:image-20220610161353-7.png]]
201
202
203 You can also choose to create the device manually.
204
205 [[image:image-20220610161538-8.png]]
206
207
208
209 **Add APP KEY and DEV EUI**
210
211 [[image:image-20220610161538-9.png]]
212
213
214
215 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
216
217
218 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
219
220 [[image:image-20220610161724-10.png]]
221
222
223 (((
224 (% 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.
225 )))
226
227 [[image:1654849068701-275.png]]
228
229
230
231 == 2.3  ​Uplink Payload ==
232
233 (((
234 (((
235 LDDS75 will uplink payload via LoRaWAN with below payload format: 
236 )))
237
238 (((
239 Uplink payload includes in total 4 bytes.
240 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
241 )))
242 )))
243
244 (((
245
246 )))
247
248 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
249 |=(% style="width: 62.5px;" %)(((
250 **Size (bytes)**
251 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
252 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
253 [[Distance>>||anchor="H2.3.2A0Distance"]]
254
255 (unit: mm)
256 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
257 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
258 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
259
260 [[image:1654850511545-399.png]]
261
262
263
264 === 2.3.1  Battery Info ===
265
266
267 Check the battery voltage for LDDS75.
268
269 Ex1: 0x0B45 = 2885mV
270
271 Ex2: 0x0B49 = 2889mV
272
273
274
275 === 2.3.2  Distance ===
276
277 (((
278 Get the distance. Flat object range 280mm - 7500mm.
279 )))
280
281 (((
282 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.**
283 )))
284
285
286 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
287 * 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.
288
289
290
291
292 === 2.3.3  Interrupt Pin ===
293
294 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.
295
296 **Example:**
297
298 0x00: Normal uplink packet.
299
300 0x01: Interrupt Uplink Packet.
301
302
303
304 === 2.3.4  DS18B20 Temperature sensor ===
305
306 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
307
308 **Example**:
309
310 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
311
312 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
313
314 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
315
316
317
318 === 2.3.5  Sensor Flag ===
319
320 0x01: Detect Ultrasonic Sensor
321
322 0x00: No Ultrasonic Sensor
323
324
325
326 === 2.3.6  Decode payload in The Things Network ===
327
328 While using TTN network, you can add the payload format to decode the payload.
329
330
331 [[image:1654850829385-439.png]]
332
333 The payload decoder function for TTN V3 is here:
334
335 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/]]
336
337
338
339 == 2.4  Uplink Interval ==
340
341 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"]]
342
343
344
345 == 2.5  ​Show Data in DataCake IoT Server ==
346
347 (((
348 [[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:
349 )))
350
351 (((
352
353 )))
354
355 (((
356 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
357 )))
358
359 (((
360 (% 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:**
361 )))
362
363
364 [[image:1654592790040-760.png]]
365
366
367 [[image:1654592800389-571.png]]
368
369
370 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
371
372 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
373
374 [[image:1654851029373-510.png]]
375
376
377 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
378
379 [[image:image-20220610165129-11.png||height="595" width="1088"]]
380
381
382
383 == 2.6  Frequency Plans ==
384
385 (((
386 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.
387 )))
388
389
390
391 === 2.6.1  EU863-870 (EU868) ===
392
393 (((
394 (% style="color:blue" %)**Uplink:**
395 )))
396
397 (((
398 868.1 - SF7BW125 to SF12BW125
399 )))
400
401 (((
402 868.3 - SF7BW125 to SF12BW125 and SF7BW250
403 )))
404
405 (((
406 868.5 - SF7BW125 to SF12BW125
407 )))
408
409 (((
410 867.1 - SF7BW125 to SF12BW125
411 )))
412
413 (((
414 867.3 - SF7BW125 to SF12BW125
415 )))
416
417 (((
418 867.5 - SF7BW125 to SF12BW125
419 )))
420
421 (((
422 867.7 - SF7BW125 to SF12BW125
423 )))
424
425 (((
426 867.9 - SF7BW125 to SF12BW125
427 )))
428
429 (((
430 868.8 - FSK
431 )))
432
433 (((
434
435 )))
436
437 (((
438 (% style="color:blue" %)**Downlink:**
439 )))
440
441 (((
442 Uplink channels 1-9 (RX1)
443 )))
444
445 (((
446 869.525 - SF9BW125 (RX2 downlink only)
447 )))
448
449
450
451 === 2.6.2  US902-928(US915) ===
452
453 (((
454 Used in USA, Canada and South America. Default use CHE=2
455
456 (% style="color:blue" %)**Uplink:**
457
458 903.9 - SF7BW125 to SF10BW125
459
460 904.1 - SF7BW125 to SF10BW125
461
462 904.3 - SF7BW125 to SF10BW125
463
464 904.5 - SF7BW125 to SF10BW125
465
466 904.7 - SF7BW125 to SF10BW125
467
468 904.9 - SF7BW125 to SF10BW125
469
470 905.1 - SF7BW125 to SF10BW125
471
472 905.3 - SF7BW125 to SF10BW125
473
474
475 (% style="color:blue" %)**Downlink:**
476
477 923.3 - SF7BW500 to SF12BW500
478
479 923.9 - SF7BW500 to SF12BW500
480
481 924.5 - SF7BW500 to SF12BW500
482
483 925.1 - SF7BW500 to SF12BW500
484
485 925.7 - SF7BW500 to SF12BW500
486
487 926.3 - SF7BW500 to SF12BW500
488
489 926.9 - SF7BW500 to SF12BW500
490
491 927.5 - SF7BW500 to SF12BW500
492
493 923.3 - SF12BW500(RX2 downlink only)
494
495
496
497 )))
498
499 === 2.6.3  CN470-510 (CN470) ===
500
501 (((
502 Used in China, Default use CHE=1
503 )))
504
505 (((
506 (% style="color:blue" %)**Uplink:**
507 )))
508
509 (((
510 486.3 - SF7BW125 to SF12BW125
511 )))
512
513 (((
514 486.5 - SF7BW125 to SF12BW125
515 )))
516
517 (((
518 486.7 - SF7BW125 to SF12BW125
519 )))
520
521 (((
522 486.9 - SF7BW125 to SF12BW125
523 )))
524
525 (((
526 487.1 - SF7BW125 to SF12BW125
527 )))
528
529 (((
530 487.3 - SF7BW125 to SF12BW125
531 )))
532
533 (((
534 487.5 - SF7BW125 to SF12BW125
535 )))
536
537 (((
538 487.7 - SF7BW125 to SF12BW125
539 )))
540
541 (((
542
543 )))
544
545 (((
546 (% style="color:blue" %)**Downlink:**
547 )))
548
549 (((
550 506.7 - SF7BW125 to SF12BW125
551 )))
552
553 (((
554 506.9 - SF7BW125 to SF12BW125
555 )))
556
557 (((
558 507.1 - SF7BW125 to SF12BW125
559 )))
560
561 (((
562 507.3 - SF7BW125 to SF12BW125
563 )))
564
565 (((
566 507.5 - SF7BW125 to SF12BW125
567 )))
568
569 (((
570 507.7 - SF7BW125 to SF12BW125
571 )))
572
573 (((
574 507.9 - SF7BW125 to SF12BW125
575 )))
576
577 (((
578 508.1 - SF7BW125 to SF12BW125
579 )))
580
581 (((
582 505.3 - SF12BW125 (RX2 downlink only)
583 )))
584
585
586
587 === 2.6.4  AU915-928(AU915) ===
588
589 (((
590 Default use CHE=2
591
592 (% style="color:blue" %)**Uplink:**
593
594 916.8 - SF7BW125 to SF12BW125
595
596 917.0 - SF7BW125 to SF12BW125
597
598 917.2 - SF7BW125 to SF12BW125
599
600 917.4 - SF7BW125 to SF12BW125
601
602 917.6 - SF7BW125 to SF12BW125
603
604 917.8 - SF7BW125 to SF12BW125
605
606 918.0 - SF7BW125 to SF12BW125
607
608 918.2 - SF7BW125 to SF12BW125
609
610
611 (% style="color:blue" %)**Downlink:**
612
613 923.3 - SF7BW500 to SF12BW500
614
615 923.9 - SF7BW500 to SF12BW500
616
617 924.5 - SF7BW500 to SF12BW500
618
619 925.1 - SF7BW500 to SF12BW500
620
621 925.7 - SF7BW500 to SF12BW500
622
623 926.3 - SF7BW500 to SF12BW500
624
625 926.9 - SF7BW500 to SF12BW500
626
627 927.5 - SF7BW500 to SF12BW500
628
629 923.3 - SF12BW500(RX2 downlink only)
630
631
632
633 )))
634
635 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
636
637 (((
638 (% style="color:blue" %)**Default Uplink channel:**
639 )))
640
641 (((
642 923.2 - SF7BW125 to SF10BW125
643 )))
644
645 (((
646 923.4 - SF7BW125 to SF10BW125
647 )))
648
649 (((
650
651 )))
652
653 (((
654 (% style="color:blue" %)**Additional Uplink Channel**:
655 )))
656
657 (((
658 (OTAA mode, channel added by JoinAccept message)
659 )))
660
661 (((
662
663 )))
664
665 (((
666 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
667 )))
668
669 (((
670 922.2 - SF7BW125 to SF10BW125
671 )))
672
673 (((
674 922.4 - SF7BW125 to SF10BW125
675 )))
676
677 (((
678 922.6 - SF7BW125 to SF10BW125
679 )))
680
681 (((
682 922.8 - SF7BW125 to SF10BW125
683 )))
684
685 (((
686 923.0 - SF7BW125 to SF10BW125
687 )))
688
689 (((
690 922.0 - SF7BW125 to SF10BW125
691 )))
692
693 (((
694
695 )))
696
697 (((
698 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
699 )))
700
701 (((
702 923.6 - SF7BW125 to SF10BW125
703 )))
704
705 (((
706 923.8 - SF7BW125 to SF10BW125
707 )))
708
709 (((
710 924.0 - SF7BW125 to SF10BW125
711 )))
712
713 (((
714 924.2 - SF7BW125 to SF10BW125
715 )))
716
717 (((
718 924.4 - SF7BW125 to SF10BW125
719 )))
720
721 (((
722 924.6 - SF7BW125 to SF10BW125
723 )))
724
725 (((
726
727 )))
728
729 (((
730 (% style="color:blue" %)**Downlink:**
731 )))
732
733 (((
734 Uplink channels 1-8 (RX1)
735 )))
736
737 (((
738 923.2 - SF10BW125 (RX2)
739 )))
740
741
742
743 === 2.6.6  KR920-923 (KR920) ===
744
745 (((
746 (% style="color:blue" %)**Default channel:**
747 )))
748
749 (((
750 922.1 - SF7BW125 to SF12BW125
751 )))
752
753 (((
754 922.3 - SF7BW125 to SF12BW125
755 )))
756
757 (((
758 922.5 - SF7BW125 to SF12BW125
759 )))
760
761 (((
762
763 )))
764
765 (((
766 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
767 )))
768
769 (((
770 922.1 - SF7BW125 to SF12BW125
771 )))
772
773 (((
774 922.3 - SF7BW125 to SF12BW125
775 )))
776
777 (((
778 922.5 - SF7BW125 to SF12BW125
779 )))
780
781 (((
782 922.7 - SF7BW125 to SF12BW125
783 )))
784
785 (((
786 922.9 - SF7BW125 to SF12BW125
787 )))
788
789 (((
790 923.1 - SF7BW125 to SF12BW125
791 )))
792
793 (((
794 923.3 - SF7BW125 to SF12BW125
795 )))
796
797 (((
798
799 )))
800
801 (((
802 (% style="color:blue" %)**Downlink:**
803 )))
804
805 (((
806 Uplink channels 1-7(RX1)
807 )))
808
809 (((
810 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
811 )))
812
813
814
815 === 2.6.7  IN865-867 (IN865) ===
816
817 (((
818 (% style="color:blue" %)**Uplink:**
819 )))
820
821 (((
822 865.0625 - SF7BW125 to SF12BW125
823 )))
824
825 (((
826 865.4025 - SF7BW125 to SF12BW125
827 )))
828
829 (((
830 865.9850 - SF7BW125 to SF12BW125
831 )))
832
833 (((
834
835 )))
836
837 (((
838 (% style="color:blue" %)**Downlink:**
839 )))
840
841 (((
842 Uplink channels 1-3 (RX1)
843 )))
844
845 (((
846 866.550 - SF10BW125 (RX2)
847 )))
848
849
850
851 == 2.7  LED Indicator ==
852
853 The LDDS75 has an internal LED which is to show the status of different state.
854
855
856 * Blink once when device power on.
857 * The device detects the sensor and flashes 5 times.
858 * Solid ON for 5 seconds once device successful Join the network.
859 * Blink once when device transmit a packet.
860
861 == 2.8  ​Firmware Change Log ==
862
863
864 **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/]]
865
866
867 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
868
869
870
871 == 2.9  Mechanical ==
872
873
874 [[image:image-20220610172003-1.png]]
875
876
877 [[image:image-20220610172003-2.png]]
878
879
880
881 == 2.10  Battery Analysis ==
882
883 === 2.10.1  Battery Type ===
884
885 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.
886
887
888 The battery related documents as below:
889
890 * (((
891 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
892 )))
893 * (((
894 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
895 )))
896 * (((
897 [[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]]
898 )))
899
900 [[image:image-20220610172400-3.png]]
901
902
903
904 === 2.10.2  Replace the battery ===
905
906 (((
907 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.
908 )))
909
910 (((
911
912 )))
913
914 (((
915 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)
916 )))
917
918
919
920 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
921
922 (((
923 (((
924 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
925 )))
926 )))
927
928 * (((
929 (((
930 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
931 )))
932 )))
933 * (((
934 (((
935 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
936 )))
937 )))
938
939 (((
940 (((
941
942 )))
943
944 (((
945 There are two kinds of commands to configure LDDS75, they are:
946 )))
947 )))
948
949 * (((
950 (((
951 (% style="color:#4f81bd" %)** General Commands**.
952 )))
953 )))
954
955 (((
956 (((
957 These commands are to configure:
958 )))
959 )))
960
961 * (((
962 (((
963 General system settings like: uplink interval.
964 )))
965 )))
966 * (((
967 (((
968 LoRaWAN protocol & radio related command.
969 )))
970 )))
971
972 (((
973 (((
974 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]]
975 )))
976 )))
977
978 (((
979 (((
980
981 )))
982 )))
983
984 * (((
985 (((
986 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
987 )))
988 )))
989
990 (((
991 (((
992 These commands only valid for LDDS75, as below:
993 )))
994 )))
995
996
997
998 == 3.1  Access AT Commands ==
999
1000 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.
1001
1002 [[image:image-20220610172924-4.png||height="483" width="988"]]
1003
1004
1005 Or if you have below board, use below connection:
1006
1007
1008 [[image:image-20220610172924-5.png]]
1009
1010
1011 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:
1012
1013
1014 [[image:image-20220610172924-6.png||height="601" width="860"]]
1015
1016
1017
1018 == 3.2  Set Transmit Interval Time ==
1019
1020 Feature: Change LoRaWAN End Node Transmit Interval.
1021
1022 (% style="color:#037691" %)**AT Command: AT+TDC**
1023
1024 [[image:image-20220610173409-7.png]]
1025
1026
1027 (((
1028 (% style="color:#037691" %)**Downlink Command: 0x01**
1029 )))
1030
1031 (((
1032 (((
1033 Format: Command Code (0x01) followed by 3 bytes time value.
1034
1035 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1036
1037 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1038 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1039 )))
1040
1041
1042
1043 )))
1044
1045 == 3.3  Set Interrupt Mode ==
1046
1047 Feature, Set Interrupt mode for GPIO_EXIT.
1048
1049 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1050
1051 [[image:image-20220610174917-9.png]]
1052
1053
1054 (% style="color:#037691" %)**Downlink Command: 0x06**
1055
1056 Format: Command Code (0x06) followed by 3 bytes.
1057
1058 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1059
1060 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1061 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1062
1063 = 4.  FAQ =
1064
1065 == 4.1  What is the frequency plan for LDDS75? ==
1066
1067 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"]]
1068
1069
1070
1071 == 4.2  How to change the LoRa Frequency Bands/Region ==
1072
1073 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1074 When downloading the images, choose the required image file for download. ​
1075
1076
1077
1078 == 4.3  Can I use LDDS75 in condensation environment? ==
1079
1080 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1081
1082
1083
1084 = 5.  Trouble Shooting =
1085
1086 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1087
1088 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1089
1090
1091 == 5.2  AT Command input doesn't work ==
1092
1093 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.
1094
1095 (((
1096
1097 )))
1098
1099
1100 = 6.  Order Info =
1101
1102
1103 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1104
1105
1106 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1107
1108 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1109 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1110 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1111 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1112 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1113 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1114 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1115 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1116
1117 (% style="color:blue" %)**YY**(%%): Battery Option
1118
1119 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1120 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1121
1122 = 7. ​ Packing Info =
1123
1124
1125 **Package Includes**:
1126
1127 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1128
1129 **Dimension and weight**:
1130
1131 * Device Size: cm
1132 * Device Weight: g
1133 * Package Size / pcs : cm
1134 * Weight / pcs : g
1135
1136 = 8.  ​Support =
1137
1138 * 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.
1139 * 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]].