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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
3
4
5
6
7 **Table of Contents:**
8
9
10
11
12
13
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  Specification ==
106
107 === 1.3.1  Rated environmental conditions ===
108
109 [[image:image-20220610154839-1.png]]
110
111 (((
112 **Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
113
114 **~ 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)**
115 )))
116
117
118
119 === 1.3.2  Effective measurement range Reference beam pattern ===
120
121 **(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
122
123
124
125 [[image:1654852253176-749.png]]
126
127
128
129 (((
130 **(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.**
131 )))
132
133
134 [[image:1654852175653-550.png]](% style="display:none" %) ** **
135
136
137
138 == 1.5 ​ Applications ==
139
140 * Horizontal distance measurement
141 * Liquid level measurement
142 * Parking management system
143 * Object proximity and presence detection
144 * Intelligent trash can management system
145 * Robot obstacle avoidance
146 * Automatic control
147 * Sewer
148 * Bottom water level monitoring
149
150 == 1.6  Pin mapping and power on ==
151
152
153 [[image:1654847583902-256.png]]
154
155
156
157 = 2.  Configure LDDS75 to connect to LoRaWAN network =
158
159 == 2.1  How it works ==
160
161 (((
162 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
163 )))
164
165 (((
166 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.
167 )))
168
169
170
171 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
172
173 (((
174 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.
175 )))
176
177 (((
178 [[image:1654848616367-242.png]]
179 )))
180
181 (((
182 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.
183 )))
184
185 (((
186
187
188 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
189 )))
190
191 (((
192 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
193 )))
194
195 [[image:image-20220607170145-1.jpeg]]
196
197
198 (((
199 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
200 )))
201
202 (((
203 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
204 )))
205
206 (((
207
208
209 **Add APP EUI in the application**
210 )))
211
212 [[image:image-20220610161353-4.png]]
213
214 [[image:image-20220610161353-5.png]]
215
216 [[image:image-20220610161353-6.png]]
217
218
219 [[image:image-20220610161353-7.png]]
220
221
222 You can also choose to create the device manually.
223
224 [[image:image-20220610161538-8.png]]
225
226
227
228 **Add APP KEY and DEV EUI**
229
230 [[image:image-20220610161538-9.png]]
231
232
233
234 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
235
236
237 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
238
239 [[image:image-20220610161724-10.png]]
240
241
242 (((
243 (% 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.
244 )))
245
246 [[image:1654849068701-275.png]]
247
248
249
250 == 2.3  ​Uplink Payload ==
251
252 (((
253 (((
254 LDDS75 will uplink payload via LoRaWAN with below payload format: 
255 )))
256
257 (((
258 Uplink payload includes in total 4 bytes.
259 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
260 )))
261 )))
262
263 (((
264
265 )))
266
267 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
268 |=(% style="width: 62.5px;" %)(((
269 **Size (bytes)**
270 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
271 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
272 [[Distance>>||anchor="H2.3.2A0Distance"]]
273
274 (unit: mm)
275 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
276 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
277 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
278
279 [[image:1654850511545-399.png]]
280
281
282
283 === 2.3.1  Battery Info ===
284
285
286 Check the battery voltage for LDDS75.
287
288 Ex1: 0x0B45 = 2885mV
289
290 Ex2: 0x0B49 = 2889mV
291
292
293
294 === 2.3.2  Distance ===
295
296 (((
297 Get the distance. Flat object range 280mm - 7500mm.
298 )))
299
300 (((
301 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.**
302 )))
303
304
305 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
306 * 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.
307
308 === 2.3.3  Interrupt Pin ===
309
310 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.
311
312 **Example:**
313
314 0x00: Normal uplink packet.
315
316 0x01: Interrupt Uplink Packet.
317
318
319
320 === 2.3.4  DS18B20 Temperature sensor ===
321
322 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
323
324 **Example**:
325
326 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
327
328 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
329
330 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
331
332
333
334 === 2.3.5  Sensor Flag ===
335
336 (((
337 0x01: Detect Ultrasonic Sensor
338 )))
339
340 (((
341 0x00: No Ultrasonic Sensor
342 )))
343
344
345
346 === 2.3.6  Decode payload in The Things Network ===
347
348 While using TTN network, you can add the payload format to decode the payload.
349
350
351 [[image:1654850829385-439.png]]
352
353 The payload decoder function for TTN V3 is here:
354
355 (((
356 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/]]
357 )))
358
359
360
361 == 2.4  Uplink Interval ==
362
363 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"]]
364
365
366
367 == 2.5  ​Show Data in DataCake IoT Server ==
368
369 (((
370 [[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:
371 )))
372
373 (((
374
375 )))
376
377 (((
378 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
379 )))
380
381 (((
382 (% 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:**
383 )))
384
385
386 [[image:1654592790040-760.png]]
387
388
389 [[image:1654592800389-571.png]]
390
391
392 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
393
394 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
395
396 [[image:1654851029373-510.png]]
397
398
399 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
400
401 [[image:image-20220610165129-11.png||height="595" width="1088"]]
402
403
404
405 == 2.6  Frequency Plans ==
406
407 (((
408 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.
409 )))
410
411
412
413 === 2.6.1  EU863-870 (EU868) ===
414
415 (((
416 (% style="color:blue" %)**Uplink:**
417 )))
418
419 (((
420 868.1 - SF7BW125 to SF12BW125
421 )))
422
423 (((
424 868.3 - SF7BW125 to SF12BW125 and SF7BW250
425 )))
426
427 (((
428 868.5 - SF7BW125 to SF12BW125
429 )))
430
431 (((
432 867.1 - SF7BW125 to SF12BW125
433 )))
434
435 (((
436 867.3 - SF7BW125 to SF12BW125
437 )))
438
439 (((
440 867.5 - SF7BW125 to SF12BW125
441 )))
442
443 (((
444 867.7 - SF7BW125 to SF12BW125
445 )))
446
447 (((
448 867.9 - SF7BW125 to SF12BW125
449 )))
450
451 (((
452 868.8 - FSK
453 )))
454
455 (((
456
457 )))
458
459 (((
460 (% style="color:blue" %)**Downlink:**
461 )))
462
463 (((
464 Uplink channels 1-9 (RX1)
465 )))
466
467 (((
468 869.525 - SF9BW125 (RX2 downlink only)
469 )))
470
471
472
473 === 2.6.2  US902-928(US915) ===
474
475 (((
476 Used in USA, Canada and South America. Default use CHE=2
477
478 (% style="color:blue" %)**Uplink:**
479
480 903.9 - SF7BW125 to SF10BW125
481
482 904.1 - SF7BW125 to SF10BW125
483
484 904.3 - SF7BW125 to SF10BW125
485
486 904.5 - SF7BW125 to SF10BW125
487
488 904.7 - SF7BW125 to SF10BW125
489
490 904.9 - SF7BW125 to SF10BW125
491
492 905.1 - SF7BW125 to SF10BW125
493
494 905.3 - SF7BW125 to SF10BW125
495
496
497 (% style="color:blue" %)**Downlink:**
498
499 923.3 - SF7BW500 to SF12BW500
500
501 923.9 - SF7BW500 to SF12BW500
502
503 924.5 - SF7BW500 to SF12BW500
504
505 925.1 - SF7BW500 to SF12BW500
506
507 925.7 - SF7BW500 to SF12BW500
508
509 926.3 - SF7BW500 to SF12BW500
510
511 926.9 - SF7BW500 to SF12BW500
512
513 927.5 - SF7BW500 to SF12BW500
514
515 923.3 - SF12BW500(RX2 downlink only)
516
517
518
519 )))
520
521 === 2.6.3  CN470-510 (CN470) ===
522
523 (((
524 Used in China, Default use CHE=1
525 )))
526
527 (((
528 (% style="color:blue" %)**Uplink:**
529 )))
530
531 (((
532 486.3 - SF7BW125 to SF12BW125
533 )))
534
535 (((
536 486.5 - SF7BW125 to SF12BW125
537 )))
538
539 (((
540 486.7 - SF7BW125 to SF12BW125
541 )))
542
543 (((
544 486.9 - SF7BW125 to SF12BW125
545 )))
546
547 (((
548 487.1 - SF7BW125 to SF12BW125
549 )))
550
551 (((
552 487.3 - SF7BW125 to SF12BW125
553 )))
554
555 (((
556 487.5 - SF7BW125 to SF12BW125
557 )))
558
559 (((
560 487.7 - SF7BW125 to SF12BW125
561 )))
562
563 (((
564
565 )))
566
567 (((
568 (% style="color:blue" %)**Downlink:**
569 )))
570
571 (((
572 506.7 - SF7BW125 to SF12BW125
573 )))
574
575 (((
576 506.9 - SF7BW125 to SF12BW125
577 )))
578
579 (((
580 507.1 - SF7BW125 to SF12BW125
581 )))
582
583 (((
584 507.3 - SF7BW125 to SF12BW125
585 )))
586
587 (((
588 507.5 - SF7BW125 to SF12BW125
589 )))
590
591 (((
592 507.7 - SF7BW125 to SF12BW125
593 )))
594
595 (((
596 507.9 - SF7BW125 to SF12BW125
597 )))
598
599 (((
600 508.1 - SF7BW125 to SF12BW125
601 )))
602
603 (((
604 505.3 - SF12BW125 (RX2 downlink only)
605 )))
606
607
608
609 === 2.6.4  AU915-928(AU915) ===
610
611 (((
612 Default use CHE=2
613
614 (% style="color:blue" %)**Uplink:**
615
616 916.8 - SF7BW125 to SF12BW125
617
618 917.0 - SF7BW125 to SF12BW125
619
620 917.2 - SF7BW125 to SF12BW125
621
622 917.4 - SF7BW125 to SF12BW125
623
624 917.6 - SF7BW125 to SF12BW125
625
626 917.8 - SF7BW125 to SF12BW125
627
628 918.0 - SF7BW125 to SF12BW125
629
630 918.2 - SF7BW125 to SF12BW125
631
632
633 (% style="color:blue" %)**Downlink:**
634
635 923.3 - SF7BW500 to SF12BW500
636
637 923.9 - SF7BW500 to SF12BW500
638
639 924.5 - SF7BW500 to SF12BW500
640
641 925.1 - SF7BW500 to SF12BW500
642
643 925.7 - SF7BW500 to SF12BW500
644
645 926.3 - SF7BW500 to SF12BW500
646
647 926.9 - SF7BW500 to SF12BW500
648
649 927.5 - SF7BW500 to SF12BW500
650
651 923.3 - SF12BW500(RX2 downlink only)
652
653
654
655 )))
656
657 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
658
659 (((
660 (% style="color:blue" %)**Default Uplink channel:**
661 )))
662
663 (((
664 923.2 - SF7BW125 to SF10BW125
665 )))
666
667 (((
668 923.4 - SF7BW125 to SF10BW125
669 )))
670
671 (((
672
673 )))
674
675 (((
676 (% style="color:blue" %)**Additional Uplink Channel**:
677 )))
678
679 (((
680 (OTAA mode, channel added by JoinAccept message)
681 )))
682
683 (((
684
685 )))
686
687 (((
688 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
689 )))
690
691 (((
692 922.2 - SF7BW125 to SF10BW125
693 )))
694
695 (((
696 922.4 - SF7BW125 to SF10BW125
697 )))
698
699 (((
700 922.6 - SF7BW125 to SF10BW125
701 )))
702
703 (((
704 922.8 - SF7BW125 to SF10BW125
705 )))
706
707 (((
708 923.0 - SF7BW125 to SF10BW125
709 )))
710
711 (((
712 922.0 - SF7BW125 to SF10BW125
713 )))
714
715 (((
716
717 )))
718
719 (((
720 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
721 )))
722
723 (((
724 923.6 - SF7BW125 to SF10BW125
725 )))
726
727 (((
728 923.8 - SF7BW125 to SF10BW125
729 )))
730
731 (((
732 924.0 - SF7BW125 to SF10BW125
733 )))
734
735 (((
736 924.2 - SF7BW125 to SF10BW125
737 )))
738
739 (((
740 924.4 - SF7BW125 to SF10BW125
741 )))
742
743 (((
744 924.6 - SF7BW125 to SF10BW125
745 )))
746
747 (((
748
749 )))
750
751 (((
752 (% style="color:blue" %)**Downlink:**
753 )))
754
755 (((
756 Uplink channels 1-8 (RX1)
757 )))
758
759 (((
760 923.2 - SF10BW125 (RX2)
761 )))
762
763
764
765 === 2.6.6  KR920-923 (KR920) ===
766
767 (((
768 (% style="color:blue" %)**Default channel:**
769 )))
770
771 (((
772 922.1 - SF7BW125 to SF12BW125
773 )))
774
775 (((
776 922.3 - SF7BW125 to SF12BW125
777 )))
778
779 (((
780 922.5 - SF7BW125 to SF12BW125
781 )))
782
783 (((
784
785 )))
786
787 (((
788 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
789 )))
790
791 (((
792 922.1 - SF7BW125 to SF12BW125
793 )))
794
795 (((
796 922.3 - SF7BW125 to SF12BW125
797 )))
798
799 (((
800 922.5 - SF7BW125 to SF12BW125
801 )))
802
803 (((
804 922.7 - SF7BW125 to SF12BW125
805 )))
806
807 (((
808 922.9 - SF7BW125 to SF12BW125
809 )))
810
811 (((
812 923.1 - SF7BW125 to SF12BW125
813 )))
814
815 (((
816 923.3 - SF7BW125 to SF12BW125
817 )))
818
819 (((
820
821 )))
822
823 (((
824 (% style="color:blue" %)**Downlink:**
825 )))
826
827 (((
828 Uplink channels 1-7(RX1)
829 )))
830
831 (((
832 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
833 )))
834
835
836
837 === 2.6.7  IN865-867 (IN865) ===
838
839 (((
840 (% style="color:blue" %)**Uplink:**
841 )))
842
843 (((
844 865.0625 - SF7BW125 to SF12BW125
845 )))
846
847 (((
848 865.4025 - SF7BW125 to SF12BW125
849 )))
850
851 (((
852 865.9850 - SF7BW125 to SF12BW125
853 )))
854
855 (((
856
857 )))
858
859 (((
860 (% style="color:blue" %)**Downlink:**
861 )))
862
863 (((
864 Uplink channels 1-3 (RX1)
865 )))
866
867 (((
868 866.550 - SF10BW125 (RX2)
869 )))
870
871
872
873 == 2.7  LED Indicator ==
874
875 The LDDS75 has an internal LED which is to show the status of different state.
876
877
878 * Blink once when device power on.
879 * The device detects the sensor and flashes 5 times.
880 * Solid ON for 5 seconds once device successful Join the network.
881 * Blink once when device transmit a packet.
882
883 == 2.8  ​Firmware Change Log ==
884
885
886 (((
887 **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/]]
888 )))
889
890 (((
891
892 )))
893
894 (((
895 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
896 )))
897
898
899
900 == 2.9  Mechanical ==
901
902
903 [[image:image-20220610172003-1.png]]
904
905
906 [[image:image-20220610172003-2.png]]
907
908
909
910 == 2.10  Battery Analysis ==
911
912 === 2.10.1  Battery Type ===
913
914 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.
915
916
917 The battery related documents as below:
918
919 * (((
920 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
921 )))
922 * (((
923 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
924 )))
925 * (((
926 [[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]]
927 )))
928
929 [[image:image-20220610172400-3.png]]
930
931
932
933 === 2.10.2  Replace the battery ===
934
935 (((
936 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.
937 )))
938
939 (((
940
941 )))
942
943 (((
944 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)
945 )))
946
947
948
949 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
950
951 (((
952 (((
953 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
954 )))
955 )))
956
957 * (((
958 (((
959 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
960 )))
961 )))
962 * (((
963 (((
964 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
965 )))
966 )))
967
968 (((
969 (((
970
971 )))
972
973 (((
974 There are two kinds of commands to configure LDDS75, they are:
975 )))
976 )))
977
978 * (((
979 (((
980 (% style="color:#4f81bd" %)** General Commands**.
981 )))
982 )))
983
984 (((
985 (((
986 These commands are to configure:
987 )))
988 )))
989
990 * (((
991 (((
992 General system settings like: uplink interval.
993 )))
994 )))
995 * (((
996 (((
997 LoRaWAN protocol & radio related command.
998 )))
999 )))
1000
1001 (((
1002 (((
1003 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]]
1004 )))
1005 )))
1006
1007 (((
1008 (((
1009
1010 )))
1011 )))
1012
1013 * (((
1014 (((
1015 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1016 )))
1017 )))
1018
1019 (((
1020 (((
1021 These commands only valid for LDDS75, as below:
1022 )))
1023 )))
1024
1025
1026
1027 == 3.1  Access AT Commands ==
1028
1029 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.
1030
1031 [[image:image-20220610172924-4.png||height="483" width="988"]]
1032
1033
1034 Or if you have below board, use below connection:
1035
1036
1037 [[image:image-20220610172924-5.png]]
1038
1039
1040 (((
1041 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:
1042 )))
1043
1044
1045 [[image:image-20220610172924-6.png||height="601" width="860"]]
1046
1047
1048
1049 == 3.2  Set Transmit Interval Time ==
1050
1051 Feature: Change LoRaWAN End Node Transmit Interval.
1052
1053 (% style="color:#037691" %)**AT Command: AT+TDC**
1054
1055 [[image:image-20220610173409-7.png]]
1056
1057
1058 (((
1059 (% style="color:#037691" %)**Downlink Command: 0x01**
1060 )))
1061
1062 (((
1063 (((
1064 Format: Command Code (0x01) followed by 3 bytes time value.
1065
1066 (((
1067 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1068 )))
1069
1070 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1071 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1072 )))
1073 )))
1074
1075
1076
1077
1078
1079 == 3.3  Set Interrupt Mode ==
1080
1081 Feature, Set Interrupt mode for GPIO_EXIT.
1082
1083 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1084
1085 [[image:image-20220610174917-9.png]]
1086
1087
1088 (% style="color:#037691" %)**Downlink Command: 0x06**
1089
1090 Format: Command Code (0x06) followed by 3 bytes.
1091
1092 (((
1093 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1094 )))
1095
1096 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1097 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1098
1099 = 4.  FAQ =
1100
1101 == 4.1  What is the frequency plan for LDDS75? ==
1102
1103 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"]]
1104
1105
1106
1107 == 4.2  How to change the LoRa Frequency Bands/Region ==
1108
1109 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1110 When downloading the images, choose the required image file for download. ​
1111
1112
1113
1114 == 4.3  Can I use LDDS75 in condensation environment? ==
1115
1116 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1117
1118
1119
1120 = 5.  Trouble Shooting =
1121
1122 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1123
1124 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1125
1126
1127 == 5.2  AT Command input doesn't work ==
1128
1129 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.
1130
1131 (((
1132
1133 )))
1134
1135
1136 = 6.  Order Info =
1137
1138
1139 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1140
1141
1142 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1143
1144 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1145 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1146 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1147 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1148 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1149 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1150 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1151 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1152
1153 (% style="color:blue" %)**YY**(%%): Battery Option
1154
1155 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1156 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1157
1158 = 7. ​ Packing Info =
1159
1160
1161 **Package Includes**:
1162
1163 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1164
1165 **Dimension and weight**:
1166
1167 * Device Size: cm
1168 * Device Weight: g
1169 * Package Size / pcs : cm
1170 * Weight / pcs : g
1171
1172 = 8.  ​Support =
1173
1174 * 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.
1175 * 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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