Skip to Content
Version 172.6 by Xiaoling on 2022/06/15 09:58
Show last authors
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  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  Install LDDS20 ==
126
127
128 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
129
130 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
131
132 [[image:image-20220615091045-3.png]]
133
134
135
136 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
137
138 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.
139
140 [[image:image-20220615092010-11.png]]
141
142
143 No polish needed if the container is shine metal surface without paint or non-metal container.
144
145 [[image:image-20220615092044-12.png]]
146
147
148
149 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
150
151 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.
152
153
154 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
155
156 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
157
158
159 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.
160
161
162 (% style="color:red" %)**LED Status:**
163
164 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
165
166 * (% 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.
167 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
168
169 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
170
171
172 (% style="color:red" %)**Note 2:**
173
174 (% 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.
175
176
177
178 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
179
180 Prepare Eproxy AB glue.
181
182 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
183
184 Reset LDDS20 and see if the BLUE LED is slowly blinking.
185
186 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
187
188
189 (% style="color:red" %)**Note 1:**
190
191 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
192
193
194 (% style="color:red" %)**Note 2:**
195
196 (% 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.
197
198
199
200 == 1.6 ​ Applications ==
201
202 * Smart liquid control solution.
203 * Smart liquefied gas solution.
204
205
206
207
208 == 1.7  Precautions ==
209
210 * 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.
211 * 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.
212 * 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.
213
214
215
216
217 == 1.8  Pin mapping and power on ==
218
219
220 [[image:1655257026882-201.png]]
221
222
223
224 = 2.  Configure LDDS20 to connect to LoRaWAN network =
225
226
227 == 2.1  How it works ==
228
229 (((
230 The LDDS20 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.
231 )))
232
233 (((
234 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.A0UsingtheATCommands"]]to set the keys in the LDDS20.
235 )))
236
237
238
239 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
240
241 (((
242 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.
243 )))
244
245 (((
246 [[image:1655257698953-697.png]]
247 )))
248
249 (((
250 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.
251 )))
252
253 (((
254
255
256 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
257 )))
258
259 (((
260 Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
261 )))
262
263 [[image:image-20220607170145-1.jpeg]]
264
265
266 (((
267 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
268 )))
269
270 (((
271 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
272 )))
273
274 (((
275
276
277 **Add APP EUI in the application**
278 )))
279
280 [[image:image-20220610161353-4.png]]
281
282 [[image:image-20220610161353-5.png]]
283
284 [[image:image-20220610161353-6.png]]
285
286
287 [[image:image-20220610161353-7.png]]
288
289
290
291 You can also choose to create the device manually.
292
293 [[image:image-20220610161538-8.png]]
294
295
296
297 **Add APP KEY and DEV EUI**
298
299 [[image:image-20220610161538-9.png]]
300
301
302
303 (% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
304
305
306 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
307
308 [[image:image-20220615095102-14.png]]
309
310
311
312 (((
313 (% style="color:blue" %)**Step 3**(%%)**:**  The LDDS20 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.
314 )))
315
316 [[image:1654849068701-275.png]]
317
318
319
320 == 2.3  ​Uplink Payload ==
321
322 (((
323 (((
324 LDDS20 will uplink payload via LoRaWAN with below payload format:
325
326 Uplink payload includes in total 8 bytes.
327 Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
328 )))
329 )))
330
331 (((
332
333 )))
334
335 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
336 |=(% style="width: 62.5px;" %)(((
337 **Size (bytes)**
338 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
339 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
340 [[Distance>>||anchor="H2.3.2A0Distance"]]
341
342 (unit: mm)
343 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
344 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
345 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
346
347 [[image:1654850511545-399.png]]
348
349
350
351 === 2.3.1  Battery Info ===
352
353
354 Check the battery voltage for LDDS20.
355
356 Ex1: 0x0B45 = 2885mV
357
358 Ex2: 0x0B49 = 2889mV
359
360
361
362 === 2.3.2  Distance ===
363
364 (((
365 Get the distance. Flat object range 20mm - 2000mm.
366 )))
367
368 (((
369 For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
370 )))
371
372
373 * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
374 * 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.
375
376
377
378
379 === 2.3.3  Interrupt Pin ===
380
381 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.
382
383 **Example:**
384
385 0x00: Normal uplink packet.
386
387 0x01: Interrupt Uplink Packet.
388
389
390
391 === 2.3.4  DS18B20 Temperature sensor ===
392
393 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
394
395 **Example**:
396
397 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
398
399 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
400
401 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
402
403
404
405 === 2.3.5  Sensor Flag ===
406
407 (((
408 0x01: Detect Ultrasonic Sensor
409 )))
410
411 (((
412 0x00: No Ultrasonic Sensor
413 )))
414
415
416
417 === 2.3.6  Decode payload in The Things Network ===
418
419 While using TTN network, you can add the payload format to decode the payload.
420
421
422 [[image:1654850829385-439.png]]
423
424 The payload decoder function for TTN V3 is here:
425
426 (((
427 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/]]
428 )))
429
430
431
432 == 2.4  Uplink Interval ==
433
434 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"]]
435
436
437
438 == 2.5  ​Show Data in DataCake IoT Server ==
439
440 (((
441 [[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:
442 )))
443
444 (((
445
446 )))
447
448 (((
449 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
450 )))
451
452 (((
453 (% 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:**
454 )))
455
456
457 [[image:1654592790040-760.png]]
458
459
460 [[image:1654592800389-571.png]]
461
462
463 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
464
465 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
466
467 [[image:1654851029373-510.png]]
468
469
470 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
471
472 [[image:image-20220610165129-11.png||height="595" width="1088"]]
473
474
475
476 == 2.6  Frequency Plans ==
477
478 (((
479 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.
480 )))
481
482
483
484 === 2.6.1  EU863-870 (EU868) ===
485
486 (((
487 (% style="color:blue" %)**Uplink:**
488 )))
489
490 (((
491 868.1 - SF7BW125 to SF12BW125
492 )))
493
494 (((
495 868.3 - SF7BW125 to SF12BW125 and SF7BW250
496 )))
497
498 (((
499 868.5 - SF7BW125 to SF12BW125
500 )))
501
502 (((
503 867.1 - SF7BW125 to SF12BW125
504 )))
505
506 (((
507 867.3 - SF7BW125 to SF12BW125
508 )))
509
510 (((
511 867.5 - SF7BW125 to SF12BW125
512 )))
513
514 (((
515 867.7 - SF7BW125 to SF12BW125
516 )))
517
518 (((
519 867.9 - SF7BW125 to SF12BW125
520 )))
521
522 (((
523 868.8 - FSK
524 )))
525
526 (((
527
528 )))
529
530 (((
531 (% style="color:blue" %)**Downlink:**
532 )))
533
534 (((
535 Uplink channels 1-9 (RX1)
536 )))
537
538 (((
539 869.525 - SF9BW125 (RX2 downlink only)
540 )))
541
542
543
544 === 2.6.2  US902-928(US915) ===
545
546 (((
547 Used in USA, Canada and South America. Default use CHE=2
548
549 (% style="color:blue" %)**Uplink:**
550
551 903.9 - SF7BW125 to SF10BW125
552
553 904.1 - SF7BW125 to SF10BW125
554
555 904.3 - SF7BW125 to SF10BW125
556
557 904.5 - SF7BW125 to SF10BW125
558
559 904.7 - SF7BW125 to SF10BW125
560
561 904.9 - SF7BW125 to SF10BW125
562
563 905.1 - SF7BW125 to SF10BW125
564
565 905.3 - SF7BW125 to SF10BW125
566
567
568 (% style="color:blue" %)**Downlink:**
569
570 923.3 - SF7BW500 to SF12BW500
571
572 923.9 - SF7BW500 to SF12BW500
573
574 924.5 - SF7BW500 to SF12BW500
575
576 925.1 - SF7BW500 to SF12BW500
577
578 925.7 - SF7BW500 to SF12BW500
579
580 926.3 - SF7BW500 to SF12BW500
581
582 926.9 - SF7BW500 to SF12BW500
583
584 927.5 - SF7BW500 to SF12BW500
585
586 923.3 - SF12BW500(RX2 downlink only)
587
588
589
590 )))
591
592 === 2.6.3  CN470-510 (CN470) ===
593
594 (((
595 Used in China, Default use CHE=1
596 )))
597
598 (((
599 (% style="color:blue" %)**Uplink:**
600 )))
601
602 (((
603 486.3 - SF7BW125 to SF12BW125
604 )))
605
606 (((
607 486.5 - SF7BW125 to SF12BW125
608 )))
609
610 (((
611 486.7 - SF7BW125 to SF12BW125
612 )))
613
614 (((
615 486.9 - SF7BW125 to SF12BW125
616 )))
617
618 (((
619 487.1 - SF7BW125 to SF12BW125
620 )))
621
622 (((
623 487.3 - SF7BW125 to SF12BW125
624 )))
625
626 (((
627 487.5 - SF7BW125 to SF12BW125
628 )))
629
630 (((
631 487.7 - SF7BW125 to SF12BW125
632 )))
633
634 (((
635
636 )))
637
638 (((
639 (% style="color:blue" %)**Downlink:**
640 )))
641
642 (((
643 506.7 - SF7BW125 to SF12BW125
644 )))
645
646 (((
647 506.9 - SF7BW125 to SF12BW125
648 )))
649
650 (((
651 507.1 - SF7BW125 to SF12BW125
652 )))
653
654 (((
655 507.3 - SF7BW125 to SF12BW125
656 )))
657
658 (((
659 507.5 - SF7BW125 to SF12BW125
660 )))
661
662 (((
663 507.7 - SF7BW125 to SF12BW125
664 )))
665
666 (((
667 507.9 - SF7BW125 to SF12BW125
668 )))
669
670 (((
671 508.1 - SF7BW125 to SF12BW125
672 )))
673
674 (((
675 505.3 - SF12BW125 (RX2 downlink only)
676 )))
677
678
679
680 === 2.6.4  AU915-928(AU915) ===
681
682 (((
683 Default use CHE=2
684
685 (% style="color:blue" %)**Uplink:**
686
687 916.8 - SF7BW125 to SF12BW125
688
689 917.0 - SF7BW125 to SF12BW125
690
691 917.2 - SF7BW125 to SF12BW125
692
693 917.4 - SF7BW125 to SF12BW125
694
695 917.6 - SF7BW125 to SF12BW125
696
697 917.8 - SF7BW125 to SF12BW125
698
699 918.0 - SF7BW125 to SF12BW125
700
701 918.2 - SF7BW125 to SF12BW125
702
703
704 (% style="color:blue" %)**Downlink:**
705
706 923.3 - SF7BW500 to SF12BW500
707
708 923.9 - SF7BW500 to SF12BW500
709
710 924.5 - SF7BW500 to SF12BW500
711
712 925.1 - SF7BW500 to SF12BW500
713
714 925.7 - SF7BW500 to SF12BW500
715
716 926.3 - SF7BW500 to SF12BW500
717
718 926.9 - SF7BW500 to SF12BW500
719
720 927.5 - SF7BW500 to SF12BW500
721
722 923.3 - SF12BW500(RX2 downlink only)
723
724
725
726 )))
727
728 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
729
730 (((
731 (% style="color:blue" %)**Default Uplink channel:**
732 )))
733
734 (((
735 923.2 - SF7BW125 to SF10BW125
736 )))
737
738 (((
739 923.4 - SF7BW125 to SF10BW125
740 )))
741
742 (((
743
744 )))
745
746 (((
747 (% style="color:blue" %)**Additional Uplink Channel**:
748 )))
749
750 (((
751 (OTAA mode, channel added by JoinAccept message)
752 )))
753
754 (((
755
756 )))
757
758 (((
759 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
760 )))
761
762 (((
763 922.2 - SF7BW125 to SF10BW125
764 )))
765
766 (((
767 922.4 - SF7BW125 to SF10BW125
768 )))
769
770 (((
771 922.6 - SF7BW125 to SF10BW125
772 )))
773
774 (((
775 922.8 - SF7BW125 to SF10BW125
776 )))
777
778 (((
779 923.0 - SF7BW125 to SF10BW125
780 )))
781
782 (((
783 922.0 - SF7BW125 to SF10BW125
784 )))
785
786 (((
787
788 )))
789
790 (((
791 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
792 )))
793
794 (((
795 923.6 - SF7BW125 to SF10BW125
796 )))
797
798 (((
799 923.8 - SF7BW125 to SF10BW125
800 )))
801
802 (((
803 924.0 - SF7BW125 to SF10BW125
804 )))
805
806 (((
807 924.2 - SF7BW125 to SF10BW125
808 )))
809
810 (((
811 924.4 - SF7BW125 to SF10BW125
812 )))
813
814 (((
815 924.6 - SF7BW125 to SF10BW125
816 )))
817
818 (((
819
820 )))
821
822 (((
823 (% style="color:blue" %)**Downlink:**
824 )))
825
826 (((
827 Uplink channels 1-8 (RX1)
828 )))
829
830 (((
831 923.2 - SF10BW125 (RX2)
832 )))
833
834
835
836 === 2.6.6  KR920-923 (KR920) ===
837
838 (((
839 (% style="color:blue" %)**Default channel:**
840 )))
841
842 (((
843 922.1 - SF7BW125 to SF12BW125
844 )))
845
846 (((
847 922.3 - SF7BW125 to SF12BW125
848 )))
849
850 (((
851 922.5 - SF7BW125 to SF12BW125
852 )))
853
854 (((
855
856 )))
857
858 (((
859 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
860 )))
861
862 (((
863 922.1 - SF7BW125 to SF12BW125
864 )))
865
866 (((
867 922.3 - SF7BW125 to SF12BW125
868 )))
869
870 (((
871 922.5 - SF7BW125 to SF12BW125
872 )))
873
874 (((
875 922.7 - SF7BW125 to SF12BW125
876 )))
877
878 (((
879 922.9 - SF7BW125 to SF12BW125
880 )))
881
882 (((
883 923.1 - SF7BW125 to SF12BW125
884 )))
885
886 (((
887 923.3 - SF7BW125 to SF12BW125
888 )))
889
890 (((
891
892 )))
893
894 (((
895 (% style="color:blue" %)**Downlink:**
896 )))
897
898 (((
899 Uplink channels 1-7(RX1)
900 )))
901
902 (((
903 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
904 )))
905
906
907
908 === 2.6.7  IN865-867 (IN865) ===
909
910 (((
911 (% style="color:blue" %)**Uplink:**
912 )))
913
914 (((
915 865.0625 - SF7BW125 to SF12BW125
916 )))
917
918 (((
919 865.4025 - SF7BW125 to SF12BW125
920 )))
921
922 (((
923 865.9850 - SF7BW125 to SF12BW125
924 )))
925
926 (((
927
928 )))
929
930 (((
931 (% style="color:blue" %)**Downlink:**
932 )))
933
934 (((
935 Uplink channels 1-3 (RX1)
936 )))
937
938 (((
939 866.550 - SF10BW125 (RX2)
940 )))
941
942
943
944 == 2.7  LED Indicator ==
945
946 The LDDS75 has an internal LED which is to show the status of different state.
947
948
949 * Blink once when device power on.
950 * The device detects the sensor and flashes 5 times.
951 * Solid ON for 5 seconds once device successful Join the network.
952 * Blink once when device transmit a packet.
953
954 == 2.8  ​Firmware Change Log ==
955
956
957 (((
958 **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/]]
959 )))
960
961 (((
962
963 )))
964
965 (((
966 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
967 )))
968
969
970
971 == 2.9  Mechanical ==
972
973
974 [[image:image-20220610172003-1.png]]
975
976
977 [[image:image-20220610172003-2.png]]
978
979
980
981 == 2.10  Battery Analysis ==
982
983 === 2.10.1  Battery Type ===
984
985 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.
986
987
988 The battery related documents as below:
989
990 * (((
991 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
992 )))
993 * (((
994 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
995 )))
996 * (((
997 [[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]]
998 )))
999
1000 [[image:image-20220610172400-3.png]]
1001
1002
1003
1004 === 2.10.2  Replace the battery ===
1005
1006 (((
1007 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.
1008 )))
1009
1010 (((
1011
1012 )))
1013
1014 (((
1015 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)
1016 )))
1017
1018
1019
1020 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1021
1022 (((
1023 (((
1024 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1025 )))
1026 )))
1027
1028 * (((
1029 (((
1030 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1031 )))
1032 )))
1033 * (((
1034 (((
1035 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1036 )))
1037 )))
1038
1039 (((
1040 (((
1041
1042 )))
1043
1044 (((
1045 There are two kinds of commands to configure LDDS75, they are:
1046 )))
1047 )))
1048
1049 * (((
1050 (((
1051 (% style="color:#4f81bd" %)** General Commands**.
1052 )))
1053 )))
1054
1055 (((
1056 (((
1057 These commands are to configure:
1058 )))
1059 )))
1060
1061 * (((
1062 (((
1063 General system settings like: uplink interval.
1064 )))
1065 )))
1066 * (((
1067 (((
1068 LoRaWAN protocol & radio related command.
1069 )))
1070 )))
1071
1072 (((
1073 (((
1074 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]]
1075 )))
1076 )))
1077
1078 (((
1079 (((
1080
1081 )))
1082 )))
1083
1084 * (((
1085 (((
1086 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1087 )))
1088 )))
1089
1090 (((
1091 (((
1092 These commands only valid for LDDS75, as below:
1093 )))
1094 )))
1095
1096
1097
1098 == 3.1  Access AT Commands ==
1099
1100 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.
1101
1102 [[image:image-20220610172924-4.png||height="483" width="988"]]
1103
1104
1105 Or if you have below board, use below connection:
1106
1107
1108 [[image:image-20220610172924-5.png]]
1109
1110
1111 (((
1112 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:
1113 )))
1114
1115
1116 [[image:image-20220610172924-6.png||height="601" width="860"]]
1117
1118
1119
1120 == 3.2  Set Transmit Interval Time ==
1121
1122 Feature: Change LoRaWAN End Node Transmit Interval.
1123
1124 (% style="color:#037691" %)**AT Command: AT+TDC**
1125
1126 [[image:image-20220610173409-7.png]]
1127
1128
1129 (((
1130 (% style="color:#037691" %)**Downlink Command: 0x01**
1131 )))
1132
1133 (((
1134 (((
1135 Format: Command Code (0x01) followed by 3 bytes time value.
1136
1137 (((
1138 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1139 )))
1140
1141 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1142 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1143 )))
1144 )))
1145
1146
1147
1148
1149
1150 == 3.3  Set Interrupt Mode ==
1151
1152 Feature, Set Interrupt mode for GPIO_EXIT.
1153
1154 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1155
1156 [[image:image-20220610174917-9.png]]
1157
1158
1159 (% style="color:#037691" %)**Downlink Command: 0x06**
1160
1161 Format: Command Code (0x06) followed by 3 bytes.
1162
1163 (((
1164 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1165 )))
1166
1167 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1168 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1169
1170 = 4.  FAQ =
1171
1172 == 4.1  What is the frequency plan for LDDS75? ==
1173
1174 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"]]
1175
1176
1177
1178 == 4.2  How to change the LoRa Frequency Bands/Region ==
1179
1180 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1181 When downloading the images, choose the required image file for download. ​
1182
1183
1184
1185 == 4.3  Can I use LDDS75 in condensation environment? ==
1186
1187 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1188
1189
1190
1191 = 5.  Trouble Shooting =
1192
1193 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1194
1195 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1196
1197
1198 == 5.2  AT Command input doesn't work ==
1199
1200 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.
1201
1202 (((
1203
1204 )))
1205
1206
1207 = 6.  Order Info =
1208
1209
1210 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1211
1212
1213 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1214
1215 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1216 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1217 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1218 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1219 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1220 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1221 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1222 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1223
1224 (% style="color:blue" %)**YY**(%%): Battery Option
1225
1226 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1227 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1228
1229 = 7. ​ Packing Info =
1230
1231
1232 **Package Includes**:
1233
1234 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1235
1236 **Dimension and weight**:
1237
1238 * Device Size: cm
1239 * Device Weight: g
1240 * Package Size / pcs : cm
1241 * Weight / pcs : g
1242
1243 = 8.  ​Support =
1244
1245 * 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.
1246 * 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]].