Skip to Content
Version 173.4 by Xiaoling on 2022/06/15 10:13
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 == 1.3  Suitable Container & Liquid ==
104
105 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
106 * Container shape is regular, and surface is smooth.
107 * Container Thickness:
108 ** Pure metal material.  2~~8mm, best is 3~~5mm
109 ** Pure non metal material: <10 mm
110 * Pure liquid without irregular deposition.
111
112 == 1.4  Mechanical ==
113
114 [[image:image-20220615090910-1.png]]
115
116
117 [[image:image-20220615090910-2.png]]
118
119
120
121 == 1.5  Install LDDS20 ==
122
123
124 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
125
126 LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
127
128 [[image:image-20220615091045-3.png]]
129
130
131
132 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
133
134 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.
135
136 [[image:image-20220615092010-11.png]]
137
138
139 No polish needed if the container is shine metal surface without paint or non-metal container.
140
141 [[image:image-20220615092044-12.png]]
142
143
144
145 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
146
147 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.
148
149
150 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
151
152 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
153
154
155 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.
156
157
158 (% style="color:red" %)**LED Status:**
159
160 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
161
162 * (% 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.
163 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
164
165 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
166
167
168 (% style="color:red" %)**Note 2:**
169
170 (% 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.
171
172
173
174 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175
176 Prepare Eproxy AB glue.
177
178 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
179
180 Reset LDDS20 and see if the BLUE LED is slowly blinking.
181
182 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
183
184
185 (% style="color:red" %)**Note 1:**
186
187 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
188
189
190 (% style="color:red" %)**Note 2:**
191
192 (% 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.
193
194
195
196 == 1.6 ​ Applications ==
197
198 * Smart liquid control solution.
199 * Smart liquefied gas solution.
200
201 == 1.7  Precautions ==
202
203 * 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.
204 * 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.
205 * 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.
206
207 == 1.8  Pin mapping and power on ==
208
209
210 [[image:1655257026882-201.png]]
211
212
213
214 = 2.  Configure LDDS20 to connect to LoRaWAN network =
215
216
217 == 2.1  How it works ==
218
219 (((
220 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 LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
221 )))
222
223 (((
224 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.
225 )))
226
227
228
229 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
230
231 (((
232 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.
233 )))
234
235 (((
236 [[image:1655257698953-697.png]]
237 )))
238
239 (((
240 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.
241 )))
242
243 (((
244
245
246 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
247 )))
248
249 (((
250 Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
251 )))
252
253 [[image:image-20220607170145-1.jpeg]]
254
255
256 (((
257 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
258 )))
259
260 (((
261 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
262 )))
263
264 (((
265
266
267 **Add APP EUI in the application**
268 )))
269
270 [[image:image-20220610161353-4.png]]
271
272 [[image:image-20220610161353-5.png]]
273
274 [[image:image-20220610161353-6.png]]
275
276
277 [[image:image-20220610161353-7.png]]
278
279
280
281 You can also choose to create the device manually.
282
283 [[image:image-20220610161538-8.png]]
284
285
286
287 **Add APP KEY and DEV EUI**
288
289 [[image:image-20220610161538-9.png]]
290
291
292
293 (% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
294
295
296 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
297
298 [[image:image-20220615095102-14.png]]
299
300
301
302 (((
303 (% 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.
304 )))
305
306 [[image:1654849068701-275.png]]
307
308
309
310 == 2.3  ​Uplink Payload ==
311
312 (((
313 (((
314 LDDS20 will uplink payload via LoRaWAN with below payload format: 
315
316 Uplink payload includes in total 8 bytes.
317 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).
318 )))
319 )))
320
321 (((
322
323 )))
324
325 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
326 |=(% style="width: 62.5px;" %)(((
327 **Size (bytes)**
328 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
329 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
330 [[Distance>>||anchor="H2.3.2A0Distance"]]
331
332 (unit: mm)
333 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
334 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
335 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
336
337 [[image:1654850511545-399.png]]
338
339
340
341 === 2.3.1  Battery Info ===
342
343
344 Check the battery voltage for LDDS20.
345
346 Ex1: 0x0B45 = 2885mV
347
348 Ex2: 0x0B49 = 2889mV
349
350
351
352 === 2.3.2  Distance ===
353
354 (((
355 Get the distance. Flat object range 20mm - 2000mm.
356 )))
357
358 (((
359 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.**
360 )))
361
362 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
363 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
364
365 === 2.3.3  Interrupt Pin ===
366
367 This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
368
369 **Example:**
370
371 0x00: Normal uplink packet.
372
373 0x01: Interrupt Uplink Packet.
374
375
376
377 === 2.3.4  DS18B20 Temperature sensor ===
378
379 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
380
381 **Example**:
382
383 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
384
385 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
386
387 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
388
389
390
391 === 2.3.5  Sensor Flag ===
392
393 (((
394 0x01: Detect Ultrasonic Sensor
395 )))
396
397 (((
398 0x00: No Ultrasonic Sensor
399 )))
400
401
402
403 === 2.3.6  Decode payload in The Things Network ===
404
405 While using TTN network, you can add the payload format to decode the payload.
406
407
408 [[image:1654850829385-439.png]]
409
410 The payload decoder function for TTN V3 is here:
411
412 (((
413 LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
414 )))
415
416
417
418 == 2.4  Downlink Payload ==
419
420 By default, LDDS20 prints the downlink payload to console port.
421
422 [[image:image-20220615100930-15.png]]
423
424
425 **Examples:**
426
427
428 * (% style="color:blue" %)**Set TDC**
429
430 If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
431
432 Payload:    01 00 00 1E    TDC=30S
433
434 Payload:    01 00 00 3C    TDC=60S
435
436
437 * (% style="color:blue" %)**Reset**
438
439 If payload = 0x04FF, it will reset the LDDS20
440
441
442 * (% style="color:blue" %)**CFM**
443
444 Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
445
446
447
448 == 2.5  ​Show Data in DataCake IoT Server ==
449
450 (((
451 [[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:
452 )))
453
454 (((
455
456 )))
457
458 (((
459 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
460 )))
461
462 (((
463 (% 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:**
464 )))
465
466
467 [[image:1654592790040-760.png]]
468
469
470 [[image:1654592800389-571.png]]
471
472
473 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
474
475 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
476
477 [[image:1654851029373-510.png]]
478
479
480 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
481
482 [[image:image-20220610165129-11.png||height="595" width="1088"]]
483
484
485
486 == 2.6  Frequency Plans ==
487
488 (((
489 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.
490 )))
491
492
493
494 === 2.6.1  EU863-870 (EU868) ===
495
496 (((
497 (% style="color:blue" %)**Uplink:**
498 )))
499
500 (((
501 868.1 - SF7BW125 to SF12BW125
502 )))
503
504 (((
505 868.3 - SF7BW125 to SF12BW125 and SF7BW250
506 )))
507
508 (((
509 868.5 - SF7BW125 to SF12BW125
510 )))
511
512 (((
513 867.1 - SF7BW125 to SF12BW125
514 )))
515
516 (((
517 867.3 - SF7BW125 to SF12BW125
518 )))
519
520 (((
521 867.5 - SF7BW125 to SF12BW125
522 )))
523
524 (((
525 867.7 - SF7BW125 to SF12BW125
526 )))
527
528 (((
529 867.9 - SF7BW125 to SF12BW125
530 )))
531
532 (((
533 868.8 - FSK
534 )))
535
536 (((
537
538 )))
539
540 (((
541 (% style="color:blue" %)**Downlink:**
542 )))
543
544 (((
545 Uplink channels 1-9 (RX1)
546 )))
547
548 (((
549 869.525 - SF9BW125 (RX2 downlink only)
550 )))
551
552
553
554 === 2.6.2  US902-928(US915) ===
555
556 (((
557 Used in USA, Canada and South America. Default use CHE=2
558
559 (% style="color:blue" %)**Uplink:**
560
561 903.9 - SF7BW125 to SF10BW125
562
563 904.1 - SF7BW125 to SF10BW125
564
565 904.3 - SF7BW125 to SF10BW125
566
567 904.5 - SF7BW125 to SF10BW125
568
569 904.7 - SF7BW125 to SF10BW125
570
571 904.9 - SF7BW125 to SF10BW125
572
573 905.1 - SF7BW125 to SF10BW125
574
575 905.3 - SF7BW125 to SF10BW125
576
577
578 (% style="color:blue" %)**Downlink:**
579
580 923.3 - SF7BW500 to SF12BW500
581
582 923.9 - SF7BW500 to SF12BW500
583
584 924.5 - SF7BW500 to SF12BW500
585
586 925.1 - SF7BW500 to SF12BW500
587
588 925.7 - SF7BW500 to SF12BW500
589
590 926.3 - SF7BW500 to SF12BW500
591
592 926.9 - SF7BW500 to SF12BW500
593
594 927.5 - SF7BW500 to SF12BW500
595
596 923.3 - SF12BW500(RX2 downlink only)
597
598
599
600 )))
601
602 === 2.6.3  CN470-510 (CN470) ===
603
604 (((
605 Used in China, Default use CHE=1
606 )))
607
608 (((
609 (% style="color:blue" %)**Uplink:**
610 )))
611
612 (((
613 486.3 - SF7BW125 to SF12BW125
614 )))
615
616 (((
617 486.5 - SF7BW125 to SF12BW125
618 )))
619
620 (((
621 486.7 - SF7BW125 to SF12BW125
622 )))
623
624 (((
625 486.9 - SF7BW125 to SF12BW125
626 )))
627
628 (((
629 487.1 - SF7BW125 to SF12BW125
630 )))
631
632 (((
633 487.3 - SF7BW125 to SF12BW125
634 )))
635
636 (((
637 487.5 - SF7BW125 to SF12BW125
638 )))
639
640 (((
641 487.7 - SF7BW125 to SF12BW125
642 )))
643
644 (((
645
646 )))
647
648 (((
649 (% style="color:blue" %)**Downlink:**
650 )))
651
652 (((
653 506.7 - SF7BW125 to SF12BW125
654 )))
655
656 (((
657 506.9 - SF7BW125 to SF12BW125
658 )))
659
660 (((
661 507.1 - SF7BW125 to SF12BW125
662 )))
663
664 (((
665 507.3 - SF7BW125 to SF12BW125
666 )))
667
668 (((
669 507.5 - SF7BW125 to SF12BW125
670 )))
671
672 (((
673 507.7 - SF7BW125 to SF12BW125
674 )))
675
676 (((
677 507.9 - SF7BW125 to SF12BW125
678 )))
679
680 (((
681 508.1 - SF7BW125 to SF12BW125
682 )))
683
684 (((
685 505.3 - SF12BW125 (RX2 downlink only)
686 )))
687
688
689
690 === 2.6.4  AU915-928(AU915) ===
691
692 (((
693 Default use CHE=2
694
695 (% style="color:blue" %)**Uplink:**
696
697 916.8 - SF7BW125 to SF12BW125
698
699 917.0 - SF7BW125 to SF12BW125
700
701 917.2 - SF7BW125 to SF12BW125
702
703 917.4 - SF7BW125 to SF12BW125
704
705 917.6 - SF7BW125 to SF12BW125
706
707 917.8 - SF7BW125 to SF12BW125
708
709 918.0 - SF7BW125 to SF12BW125
710
711 918.2 - SF7BW125 to SF12BW125
712
713
714 (% style="color:blue" %)**Downlink:**
715
716 923.3 - SF7BW500 to SF12BW500
717
718 923.9 - SF7BW500 to SF12BW500
719
720 924.5 - SF7BW500 to SF12BW500
721
722 925.1 - SF7BW500 to SF12BW500
723
724 925.7 - SF7BW500 to SF12BW500
725
726 926.3 - SF7BW500 to SF12BW500
727
728 926.9 - SF7BW500 to SF12BW500
729
730 927.5 - SF7BW500 to SF12BW500
731
732 923.3 - SF12BW500(RX2 downlink only)
733
734
735
736 )))
737
738 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
739
740 (((
741 (% style="color:blue" %)**Default Uplink channel:**
742 )))
743
744 (((
745 923.2 - SF7BW125 to SF10BW125
746 )))
747
748 (((
749 923.4 - SF7BW125 to SF10BW125
750 )))
751
752 (((
753
754 )))
755
756 (((
757 (% style="color:blue" %)**Additional Uplink Channel**:
758 )))
759
760 (((
761 (OTAA mode, channel added by JoinAccept message)
762 )))
763
764 (((
765
766 )))
767
768 (((
769 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
770 )))
771
772 (((
773 922.2 - SF7BW125 to SF10BW125
774 )))
775
776 (((
777 922.4 - SF7BW125 to SF10BW125
778 )))
779
780 (((
781 922.6 - SF7BW125 to SF10BW125
782 )))
783
784 (((
785 922.8 - SF7BW125 to SF10BW125
786 )))
787
788 (((
789 923.0 - SF7BW125 to SF10BW125
790 )))
791
792 (((
793 922.0 - SF7BW125 to SF10BW125
794 )))
795
796 (((
797
798 )))
799
800 (((
801 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
802 )))
803
804 (((
805 923.6 - SF7BW125 to SF10BW125
806 )))
807
808 (((
809 923.8 - SF7BW125 to SF10BW125
810 )))
811
812 (((
813 924.0 - SF7BW125 to SF10BW125
814 )))
815
816 (((
817 924.2 - SF7BW125 to SF10BW125
818 )))
819
820 (((
821 924.4 - SF7BW125 to SF10BW125
822 )))
823
824 (((
825 924.6 - SF7BW125 to SF10BW125
826 )))
827
828 (((
829
830 )))
831
832 (((
833 (% style="color:blue" %)**Downlink:**
834 )))
835
836 (((
837 Uplink channels 1-8 (RX1)
838 )))
839
840 (((
841 923.2 - SF10BW125 (RX2)
842 )))
843
844
845
846 === 2.6.6  KR920-923 (KR920) ===
847
848 (((
849 (% style="color:blue" %)**Default channel:**
850 )))
851
852 (((
853 922.1 - SF7BW125 to SF12BW125
854 )))
855
856 (((
857 922.3 - SF7BW125 to SF12BW125
858 )))
859
860 (((
861 922.5 - SF7BW125 to SF12BW125
862 )))
863
864 (((
865
866 )))
867
868 (((
869 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
870 )))
871
872 (((
873 922.1 - SF7BW125 to SF12BW125
874 )))
875
876 (((
877 922.3 - SF7BW125 to SF12BW125
878 )))
879
880 (((
881 922.5 - SF7BW125 to SF12BW125
882 )))
883
884 (((
885 922.7 - SF7BW125 to SF12BW125
886 )))
887
888 (((
889 922.9 - SF7BW125 to SF12BW125
890 )))
891
892 (((
893 923.1 - SF7BW125 to SF12BW125
894 )))
895
896 (((
897 923.3 - SF7BW125 to SF12BW125
898 )))
899
900 (((
901
902 )))
903
904 (((
905 (% style="color:blue" %)**Downlink:**
906 )))
907
908 (((
909 Uplink channels 1-7(RX1)
910 )))
911
912 (((
913 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
914 )))
915
916
917
918 === 2.6.7  IN865-867 (IN865) ===
919
920 (((
921 (% style="color:blue" %)**Uplink:**
922 )))
923
924 (((
925 865.0625 - SF7BW125 to SF12BW125
926 )))
927
928 (((
929 865.4025 - SF7BW125 to SF12BW125
930 )))
931
932 (((
933 865.9850 - SF7BW125 to SF12BW125
934 )))
935
936 (((
937
938 )))
939
940 (((
941 (% style="color:blue" %)**Downlink:**
942 )))
943
944 (((
945 Uplink channels 1-3 (RX1)
946 )))
947
948 (((
949 866.550 - SF10BW125 (RX2)
950 )))
951
952
953
954 == 2.7  LED Indicator ==
955
956 The LDDS75 has an internal LED which is to show the status of different state.
957
958
959 * Blink once when device power on.
960 * The device detects the sensor and flashes 5 times.
961 * Solid ON for 5 seconds once device successful Join the network.
962 * Blink once when device transmit a packet.
963
964 == 2.8  ​Firmware Change Log ==
965
966
967 (((
968 **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/]]
969 )))
970
971 (((
972
973 )))
974
975 (((
976 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
977 )))
978
979
980
981 == 2.9  Mechanical ==
982
983
984 [[image:image-20220610172003-1.png]]
985
986
987 [[image:image-20220610172003-2.png]]
988
989
990
991 == 2.10  Battery Analysis ==
992
993 === 2.10.1  Battery Type ===
994
995 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.
996
997
998 The battery related documents as below:
999
1000 * (((
1001 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1002 )))
1003 * (((
1004 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1005 )))
1006 * (((
1007 [[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]]
1008 )))
1009
1010 [[image:image-20220610172400-3.png]]
1011
1012
1013
1014 === 2.10.2  Replace the battery ===
1015
1016 (((
1017 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.
1018 )))
1019
1020 (((
1021
1022 )))
1023
1024 (((
1025 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)
1026 )))
1027
1028
1029
1030 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1031
1032 (((
1033 (((
1034 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1035 )))
1036 )))
1037
1038 * (((
1039 (((
1040 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1041 )))
1042 )))
1043 * (((
1044 (((
1045 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1046 )))
1047 )))
1048
1049 (((
1050 (((
1051
1052 )))
1053
1054 (((
1055 There are two kinds of commands to configure LDDS75, they are:
1056 )))
1057 )))
1058
1059 * (((
1060 (((
1061 (% style="color:#4f81bd" %)** General Commands**.
1062 )))
1063 )))
1064
1065 (((
1066 (((
1067 These commands are to configure:
1068 )))
1069 )))
1070
1071 * (((
1072 (((
1073 General system settings like: uplink interval.
1074 )))
1075 )))
1076 * (((
1077 (((
1078 LoRaWAN protocol & radio related command.
1079 )))
1080 )))
1081
1082 (((
1083 (((
1084 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]]
1085 )))
1086 )))
1087
1088 (((
1089 (((
1090
1091 )))
1092 )))
1093
1094 * (((
1095 (((
1096 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1097 )))
1098 )))
1099
1100 (((
1101 (((
1102 These commands only valid for LDDS75, as below:
1103 )))
1104 )))
1105
1106
1107
1108 == 3.1  Access AT Commands ==
1109
1110 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.
1111
1112 [[image:image-20220610172924-4.png||height="483" width="988"]]
1113
1114
1115 Or if you have below board, use below connection:
1116
1117
1118 [[image:image-20220610172924-5.png]]
1119
1120
1121 (((
1122 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:
1123 )))
1124
1125
1126 [[image:image-20220610172924-6.png||height="601" width="860"]]
1127
1128
1129
1130 == 3.2  Set Transmit Interval Time ==
1131
1132 Feature: Change LoRaWAN End Node Transmit Interval.
1133
1134 (% style="color:#037691" %)**AT Command: AT+TDC**
1135
1136 [[image:image-20220610173409-7.png]]
1137
1138
1139 (((
1140 (% style="color:#037691" %)**Downlink Command: 0x01**
1141 )))
1142
1143 (((
1144 (((
1145 Format: Command Code (0x01) followed by 3 bytes time value.
1146
1147 (((
1148 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1149 )))
1150
1151 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1152 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1153 )))
1154 )))
1155
1156
1157
1158
1159
1160 == 3.3  Set Interrupt Mode ==
1161
1162 Feature, Set Interrupt mode for GPIO_EXIT.
1163
1164 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1165
1166 [[image:image-20220610174917-9.png]]
1167
1168
1169 (% style="color:#037691" %)**Downlink Command: 0x06**
1170
1171 Format: Command Code (0x06) followed by 3 bytes.
1172
1173 (((
1174 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1175 )))
1176
1177 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1178 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1179
1180 = 4.  FAQ =
1181
1182 == 4.1  What is the frequency plan for LDDS75? ==
1183
1184 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"]]
1185
1186
1187
1188 == 4.2  How to change the LoRa Frequency Bands/Region ==
1189
1190 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1191 When downloading the images, choose the required image file for download. ​
1192
1193
1194
1195 == 4.3  Can I use LDDS75 in condensation environment? ==
1196
1197 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1198
1199
1200
1201 = 5.  Trouble Shooting =
1202
1203 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1204
1205 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1206
1207
1208 == 5.2  AT Command input doesn't work ==
1209
1210 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.
1211
1212 (((
1213
1214 )))
1215
1216
1217 = 6.  Order Info =
1218
1219
1220 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1221
1222
1223 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1224
1225 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1226 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1227 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1228 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1229 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1230 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1231 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1232 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1233
1234 (% style="color:blue" %)**YY**(%%): Battery Option
1235
1236 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1237 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1238
1239 = 7. ​ Packing Info =
1240
1241
1242 **Package Includes**:
1243
1244 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1245
1246 **Dimension and weight**:
1247
1248 * Device Size: cm
1249 * Device Weight: g
1250 * Package Size / pcs : cm
1251 * Weight / pcs : g
1252
1253 = 8.  ​Support =
1254
1255 * 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.
1256 * 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]].