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Version 170.3 by Xiaoling on 2022/06/15 09:38
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
3
4
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 == 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
186 (% style="color:red" %)**Note 1:**
187
188 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
189
190
191 (% style="color:red" %)**Note 2:**
192
193 (% 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.
194
195
196
197 == 1.6 ​ Applications ==
198
199 * Smart liquid control solution.
200 * Smart liquefied gas solution.
201
202
203
204 == 1.7  Precautions ==
205
206 * At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
207 * For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
208 * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
209
210
211
212 == 1.8  Pin mapping and power on ==
213
214
215 [[image:1655257026882-201.png]]
216
217
218
219 = 2.  Configure LDDS20 to connect to LoRaWAN network =
220
221
222 == 2.1  How it works ==
223
224 (((
225 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
226 )))
227
228 (((
229 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.
230 )))
231
232
233
234 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
235
236 (((
237 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.
238 )))
239
240 (((
241 [[image:1654848616367-242.png]]
242 )))
243
244 (((
245 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.
246 )))
247
248 (((
249
250
251 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
252 )))
253
254 (((
255 Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
256 )))
257
258 [[image:image-20220607170145-1.jpeg]]
259
260
261 (((
262 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
263 )))
264
265 (((
266 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
267 )))
268
269 (((
270
271
272 **Add APP EUI in the application**
273 )))
274
275 [[image:image-20220610161353-4.png]]
276
277 [[image:image-20220610161353-5.png]]
278
279 [[image:image-20220610161353-6.png]]
280
281
282 [[image:image-20220610161353-7.png]]
283
284
285 You can also choose to create the device manually.
286
287 [[image:image-20220610161538-8.png]]
288
289
290
291 **Add APP KEY and DEV EUI**
292
293 [[image:image-20220610161538-9.png]]
294
295
296
297 (% style="color:blue" %)**Step 2**(%%): Power on LDDS75
298
299
300 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
301
302 [[image:image-20220610161724-10.png]]
303
304
305 (((
306 (% 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.
307 )))
308
309 [[image:1654849068701-275.png]]
310
311
312
313 == 2.3  ​Uplink Payload ==
314
315 (((
316 (((
317 LDDS75 will uplink payload via LoRaWAN with below payload format: 
318 )))
319
320 (((
321 Uplink payload includes in total 4 bytes.
322 Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
323 )))
324 )))
325
326 (((
327
328 )))
329
330 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
331 |=(% style="width: 62.5px;" %)(((
332 **Size (bytes)**
333 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
334 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
335 [[Distance>>||anchor="H2.3.2A0Distance"]]
336
337 (unit: mm)
338 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
339 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
340 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
341
342 [[image:1654850511545-399.png]]
343
344
345
346 === 2.3.1  Battery Info ===
347
348
349 Check the battery voltage for LDDS75.
350
351 Ex1: 0x0B45 = 2885mV
352
353 Ex2: 0x0B49 = 2889mV
354
355
356
357 === 2.3.2  Distance ===
358
359 (((
360 Get the distance. Flat object range 280mm - 7500mm.
361 )))
362
363 (((
364 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.**
365 )))
366
367
368 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
369 * 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.
370
371 === 2.3.3  Interrupt Pin ===
372
373 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.
374
375 **Example:**
376
377 0x00: Normal uplink packet.
378
379 0x01: Interrupt Uplink Packet.
380
381
382
383 === 2.3.4  DS18B20 Temperature sensor ===
384
385 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
386
387 **Example**:
388
389 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
390
391 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
392
393 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
394
395
396
397 === 2.3.5  Sensor Flag ===
398
399 (((
400 0x01: Detect Ultrasonic Sensor
401 )))
402
403 (((
404 0x00: No Ultrasonic Sensor
405 )))
406
407
408
409 === 2.3.6  Decode payload in The Things Network ===
410
411 While using TTN network, you can add the payload format to decode the payload.
412
413
414 [[image:1654850829385-439.png]]
415
416 The payload decoder function for TTN V3 is here:
417
418 (((
419 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/]]
420 )))
421
422
423
424 == 2.4  Uplink Interval ==
425
426 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"]]
427
428
429
430 == 2.5  ​Show Data in DataCake IoT Server ==
431
432 (((
433 [[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
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435
436 (((
437
438 )))
439
440 (((
441 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
442 )))
443
444 (((
445 (% 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:**
446 )))
447
448
449 [[image:1654592790040-760.png]]
450
451
452 [[image:1654592800389-571.png]]
453
454
455 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
456
457 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
458
459 [[image:1654851029373-510.png]]
460
461
462 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
463
464 [[image:image-20220610165129-11.png||height="595" width="1088"]]
465
466
467
468 == 2.6  Frequency Plans ==
469
470 (((
471 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.
472 )))
473
474
475
476 === 2.6.1  EU863-870 (EU868) ===
477
478 (((
479 (% style="color:blue" %)**Uplink:**
480 )))
481
482 (((
483 868.1 - SF7BW125 to SF12BW125
484 )))
485
486 (((
487 868.3 - SF7BW125 to SF12BW125 and SF7BW250
488 )))
489
490 (((
491 868.5 - SF7BW125 to SF12BW125
492 )))
493
494 (((
495 867.1 - SF7BW125 to SF12BW125
496 )))
497
498 (((
499 867.3 - SF7BW125 to SF12BW125
500 )))
501
502 (((
503 867.5 - SF7BW125 to SF12BW125
504 )))
505
506 (((
507 867.7 - SF7BW125 to SF12BW125
508 )))
509
510 (((
511 867.9 - SF7BW125 to SF12BW125
512 )))
513
514 (((
515 868.8 - FSK
516 )))
517
518 (((
519
520 )))
521
522 (((
523 (% style="color:blue" %)**Downlink:**
524 )))
525
526 (((
527 Uplink channels 1-9 (RX1)
528 )))
529
530 (((
531 869.525 - SF9BW125 (RX2 downlink only)
532 )))
533
534
535
536 === 2.6.2  US902-928(US915) ===
537
538 (((
539 Used in USA, Canada and South America. Default use CHE=2
540
541 (% style="color:blue" %)**Uplink:**
542
543 903.9 - SF7BW125 to SF10BW125
544
545 904.1 - SF7BW125 to SF10BW125
546
547 904.3 - SF7BW125 to SF10BW125
548
549 904.5 - SF7BW125 to SF10BW125
550
551 904.7 - SF7BW125 to SF10BW125
552
553 904.9 - SF7BW125 to SF10BW125
554
555 905.1 - SF7BW125 to SF10BW125
556
557 905.3 - SF7BW125 to SF10BW125
558
559
560 (% style="color:blue" %)**Downlink:**
561
562 923.3 - SF7BW500 to SF12BW500
563
564 923.9 - SF7BW500 to SF12BW500
565
566 924.5 - SF7BW500 to SF12BW500
567
568 925.1 - SF7BW500 to SF12BW500
569
570 925.7 - SF7BW500 to SF12BW500
571
572 926.3 - SF7BW500 to SF12BW500
573
574 926.9 - SF7BW500 to SF12BW500
575
576 927.5 - SF7BW500 to SF12BW500
577
578 923.3 - SF12BW500(RX2 downlink only)
579
580
581
582 )))
583
584 === 2.6.3  CN470-510 (CN470) ===
585
586 (((
587 Used in China, Default use CHE=1
588 )))
589
590 (((
591 (% style="color:blue" %)**Uplink:**
592 )))
593
594 (((
595 486.3 - SF7BW125 to SF12BW125
596 )))
597
598 (((
599 486.5 - SF7BW125 to SF12BW125
600 )))
601
602 (((
603 486.7 - SF7BW125 to SF12BW125
604 )))
605
606 (((
607 486.9 - SF7BW125 to SF12BW125
608 )))
609
610 (((
611 487.1 - SF7BW125 to SF12BW125
612 )))
613
614 (((
615 487.3 - SF7BW125 to SF12BW125
616 )))
617
618 (((
619 487.5 - SF7BW125 to SF12BW125
620 )))
621
622 (((
623 487.7 - SF7BW125 to SF12BW125
624 )))
625
626 (((
627
628 )))
629
630 (((
631 (% style="color:blue" %)**Downlink:**
632 )))
633
634 (((
635 506.7 - SF7BW125 to SF12BW125
636 )))
637
638 (((
639 506.9 - SF7BW125 to SF12BW125
640 )))
641
642 (((
643 507.1 - SF7BW125 to SF12BW125
644 )))
645
646 (((
647 507.3 - SF7BW125 to SF12BW125
648 )))
649
650 (((
651 507.5 - SF7BW125 to SF12BW125
652 )))
653
654 (((
655 507.7 - SF7BW125 to SF12BW125
656 )))
657
658 (((
659 507.9 - SF7BW125 to SF12BW125
660 )))
661
662 (((
663 508.1 - SF7BW125 to SF12BW125
664 )))
665
666 (((
667 505.3 - SF12BW125 (RX2 downlink only)
668 )))
669
670
671
672 === 2.6.4  AU915-928(AU915) ===
673
674 (((
675 Default use CHE=2
676
677 (% style="color:blue" %)**Uplink:**
678
679 916.8 - SF7BW125 to SF12BW125
680
681 917.0 - SF7BW125 to SF12BW125
682
683 917.2 - SF7BW125 to SF12BW125
684
685 917.4 - SF7BW125 to SF12BW125
686
687 917.6 - SF7BW125 to SF12BW125
688
689 917.8 - SF7BW125 to SF12BW125
690
691 918.0 - SF7BW125 to SF12BW125
692
693 918.2 - SF7BW125 to SF12BW125
694
695
696 (% style="color:blue" %)**Downlink:**
697
698 923.3 - SF7BW500 to SF12BW500
699
700 923.9 - SF7BW500 to SF12BW500
701
702 924.5 - SF7BW500 to SF12BW500
703
704 925.1 - SF7BW500 to SF12BW500
705
706 925.7 - SF7BW500 to SF12BW500
707
708 926.3 - SF7BW500 to SF12BW500
709
710 926.9 - SF7BW500 to SF12BW500
711
712 927.5 - SF7BW500 to SF12BW500
713
714 923.3 - SF12BW500(RX2 downlink only)
715
716
717
718 )))
719
720 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
721
722 (((
723 (% style="color:blue" %)**Default Uplink channel:**
724 )))
725
726 (((
727 923.2 - SF7BW125 to SF10BW125
728 )))
729
730 (((
731 923.4 - SF7BW125 to SF10BW125
732 )))
733
734 (((
735
736 )))
737
738 (((
739 (% style="color:blue" %)**Additional Uplink Channel**:
740 )))
741
742 (((
743 (OTAA mode, channel added by JoinAccept message)
744 )))
745
746 (((
747
748 )))
749
750 (((
751 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
752 )))
753
754 (((
755 922.2 - SF7BW125 to SF10BW125
756 )))
757
758 (((
759 922.4 - SF7BW125 to SF10BW125
760 )))
761
762 (((
763 922.6 - SF7BW125 to SF10BW125
764 )))
765
766 (((
767 922.8 - SF7BW125 to SF10BW125
768 )))
769
770 (((
771 923.0 - SF7BW125 to SF10BW125
772 )))
773
774 (((
775 922.0 - SF7BW125 to SF10BW125
776 )))
777
778 (((
779
780 )))
781
782 (((
783 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
784 )))
785
786 (((
787 923.6 - SF7BW125 to SF10BW125
788 )))
789
790 (((
791 923.8 - SF7BW125 to SF10BW125
792 )))
793
794 (((
795 924.0 - SF7BW125 to SF10BW125
796 )))
797
798 (((
799 924.2 - SF7BW125 to SF10BW125
800 )))
801
802 (((
803 924.4 - SF7BW125 to SF10BW125
804 )))
805
806 (((
807 924.6 - SF7BW125 to SF10BW125
808 )))
809
810 (((
811
812 )))
813
814 (((
815 (% style="color:blue" %)**Downlink:**
816 )))
817
818 (((
819 Uplink channels 1-8 (RX1)
820 )))
821
822 (((
823 923.2 - SF10BW125 (RX2)
824 )))
825
826
827
828 === 2.6.6  KR920-923 (KR920) ===
829
830 (((
831 (% style="color:blue" %)**Default channel:**
832 )))
833
834 (((
835 922.1 - SF7BW125 to SF12BW125
836 )))
837
838 (((
839 922.3 - SF7BW125 to SF12BW125
840 )))
841
842 (((
843 922.5 - SF7BW125 to SF12BW125
844 )))
845
846 (((
847
848 )))
849
850 (((
851 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
852 )))
853
854 (((
855 922.1 - SF7BW125 to SF12BW125
856 )))
857
858 (((
859 922.3 - SF7BW125 to SF12BW125
860 )))
861
862 (((
863 922.5 - SF7BW125 to SF12BW125
864 )))
865
866 (((
867 922.7 - SF7BW125 to SF12BW125
868 )))
869
870 (((
871 922.9 - SF7BW125 to SF12BW125
872 )))
873
874 (((
875 923.1 - SF7BW125 to SF12BW125
876 )))
877
878 (((
879 923.3 - SF7BW125 to SF12BW125
880 )))
881
882 (((
883
884 )))
885
886 (((
887 (% style="color:blue" %)**Downlink:**
888 )))
889
890 (((
891 Uplink channels 1-7(RX1)
892 )))
893
894 (((
895 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
896 )))
897
898
899
900 === 2.6.7  IN865-867 (IN865) ===
901
902 (((
903 (% style="color:blue" %)**Uplink:**
904 )))
905
906 (((
907 865.0625 - SF7BW125 to SF12BW125
908 )))
909
910 (((
911 865.4025 - SF7BW125 to SF12BW125
912 )))
913
914 (((
915 865.9850 - SF7BW125 to SF12BW125
916 )))
917
918 (((
919
920 )))
921
922 (((
923 (% style="color:blue" %)**Downlink:**
924 )))
925
926 (((
927 Uplink channels 1-3 (RX1)
928 )))
929
930 (((
931 866.550 - SF10BW125 (RX2)
932 )))
933
934
935
936 == 2.7  LED Indicator ==
937
938 The LDDS75 has an internal LED which is to show the status of different state.
939
940
941 * Blink once when device power on.
942 * The device detects the sensor and flashes 5 times.
943 * Solid ON for 5 seconds once device successful Join the network.
944 * Blink once when device transmit a packet.
945
946 == 2.8  ​Firmware Change Log ==
947
948
949 (((
950 **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/]]
951 )))
952
953 (((
954
955 )))
956
957 (((
958 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
959 )))
960
961
962
963 == 2.9  Mechanical ==
964
965
966 [[image:image-20220610172003-1.png]]
967
968
969 [[image:image-20220610172003-2.png]]
970
971
972
973 == 2.10  Battery Analysis ==
974
975 === 2.10.1  Battery Type ===
976
977 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.
978
979
980 The battery related documents as below:
981
982 * (((
983 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
984 )))
985 * (((
986 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
987 )))
988 * (((
989 [[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]]
990 )))
991
992 [[image:image-20220610172400-3.png]]
993
994
995
996 === 2.10.2  Replace the battery ===
997
998 (((
999 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.
1000 )))
1001
1002 (((
1003
1004 )))
1005
1006 (((
1007 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)
1008 )))
1009
1010
1011
1012 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1013
1014 (((
1015 (((
1016 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1017 )))
1018 )))
1019
1020 * (((
1021 (((
1022 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1023 )))
1024 )))
1025 * (((
1026 (((
1027 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1028 )))
1029 )))
1030
1031 (((
1032 (((
1033
1034 )))
1035
1036 (((
1037 There are two kinds of commands to configure LDDS75, they are:
1038 )))
1039 )))
1040
1041 * (((
1042 (((
1043 (% style="color:#4f81bd" %)** General Commands**.
1044 )))
1045 )))
1046
1047 (((
1048 (((
1049 These commands are to configure:
1050 )))
1051 )))
1052
1053 * (((
1054 (((
1055 General system settings like: uplink interval.
1056 )))
1057 )))
1058 * (((
1059 (((
1060 LoRaWAN protocol & radio related command.
1061 )))
1062 )))
1063
1064 (((
1065 (((
1066 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]]
1067 )))
1068 )))
1069
1070 (((
1071 (((
1072
1073 )))
1074 )))
1075
1076 * (((
1077 (((
1078 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1079 )))
1080 )))
1081
1082 (((
1083 (((
1084 These commands only valid for LDDS75, as below:
1085 )))
1086 )))
1087
1088
1089
1090 == 3.1  Access AT Commands ==
1091
1092 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.
1093
1094 [[image:image-20220610172924-4.png||height="483" width="988"]]
1095
1096
1097 Or if you have below board, use below connection:
1098
1099
1100 [[image:image-20220610172924-5.png]]
1101
1102
1103 (((
1104 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:
1105 )))
1106
1107
1108 [[image:image-20220610172924-6.png||height="601" width="860"]]
1109
1110
1111
1112 == 3.2  Set Transmit Interval Time ==
1113
1114 Feature: Change LoRaWAN End Node Transmit Interval.
1115
1116 (% style="color:#037691" %)**AT Command: AT+TDC**
1117
1118 [[image:image-20220610173409-7.png]]
1119
1120
1121 (((
1122 (% style="color:#037691" %)**Downlink Command: 0x01**
1123 )))
1124
1125 (((
1126 (((
1127 Format: Command Code (0x01) followed by 3 bytes time value.
1128
1129 (((
1130 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1131 )))
1132
1133 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1134 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1135 )))
1136 )))
1137
1138
1139
1140
1141
1142 == 3.3  Set Interrupt Mode ==
1143
1144 Feature, Set Interrupt mode for GPIO_EXIT.
1145
1146 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1147
1148 [[image:image-20220610174917-9.png]]
1149
1150
1151 (% style="color:#037691" %)**Downlink Command: 0x06**
1152
1153 Format: Command Code (0x06) followed by 3 bytes.
1154
1155 (((
1156 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1157 )))
1158
1159 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1160 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1161
1162 = 4.  FAQ =
1163
1164 == 4.1  What is the frequency plan for LDDS75? ==
1165
1166 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"]]
1167
1168
1169
1170 == 4.2  How to change the LoRa Frequency Bands/Region ==
1171
1172 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1173 When downloading the images, choose the required image file for download. ​
1174
1175
1176
1177 == 4.3  Can I use LDDS75 in condensation environment? ==
1178
1179 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1180
1181
1182
1183 = 5.  Trouble Shooting =
1184
1185 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1186
1187 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1188
1189
1190 == 5.2  AT Command input doesn't work ==
1191
1192 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.
1193
1194 (((
1195
1196 )))
1197
1198
1199 = 6.  Order Info =
1200
1201
1202 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1203
1204
1205 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1206
1207 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1208 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1209 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1210 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1211 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1212 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1213 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1214 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1215
1216 (% style="color:blue" %)**YY**(%%): Battery Option
1217
1218 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1219 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1220
1221 = 7. ​ Packing Info =
1222
1223
1224 **Package Includes**:
1225
1226 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1227
1228 **Dimension and weight**:
1229
1230 * Device Size: cm
1231 * Device Weight: g
1232 * Package Size / pcs : cm
1233 * Weight / pcs : g
1234
1235 = 8.  ​Support =
1236
1237 * 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.
1238 * 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]].