Skip to Content
Version 173.2 by Xiaoling on 2022/06/15 10:10
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 == 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
147 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
148
149 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.
150
151
152 It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
153
154 [[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
155
156
157 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.
158
159
160 (% style="color:red" %)**LED Status:**
161
162 * Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
163
164 * (% 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.
165 * (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
166
167 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
168
169
170 (% style="color:red" %)**Note 2:**
171
172 (% 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.
173
174
175
176 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
177
178 Prepare Eproxy AB glue.
179
180 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
181
182 Reset LDDS20 and see if the BLUE LED is slowly blinking.
183
184 [[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
185
186
187 (% style="color:red" %)**Note 1:**
188
189 Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
190
191
192 (% style="color:red" %)**Note 2:**
193
194 (% 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.
195
196
197
198 == 1.6 ​ Applications ==
199
200 * Smart liquid control solution.
201 * Smart liquefied gas solution.
202
203
204
205 == 1.7  Precautions ==
206
207 * 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.
208 * 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.
209 * 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.
210
211
212
213 == 1.8  Pin mapping and power on ==
214
215
216 [[image:1655257026882-201.png]]
217
218
219
220 = 2.  Configure LDDS20 to connect to LoRaWAN network =
221
222
223 == 2.1  How it works ==
224
225 (((
226 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.
227 )))
228
229 (((
230 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.
231 )))
232
233
234
235 == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
236
237 (((
238 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.
239 )))
240
241 (((
242 [[image:1655257698953-697.png]]
243 )))
244
245 (((
246 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.
247 )))
248
249 (((
250
251
252 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
253 )))
254
255 (((
256 Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
257 )))
258
259 [[image:image-20220607170145-1.jpeg]]
260
261
262 (((
263 For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
264 )))
265
266 (((
267 Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
268 )))
269
270 (((
271
272
273 **Add APP EUI in the application**
274 )))
275
276 [[image:image-20220610161353-4.png]]
277
278 [[image:image-20220610161353-5.png]]
279
280 [[image:image-20220610161353-6.png]]
281
282
283 [[image:image-20220610161353-7.png]]
284
285
286
287 You can also choose to create the device manually.
288
289 [[image:image-20220610161538-8.png]]
290
291
292
293 **Add APP KEY and DEV EUI**
294
295 [[image:image-20220610161538-9.png]]
296
297
298
299 (% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
300
301
302 Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
303
304 [[image:image-20220615095102-14.png]]
305
306
307
308 (((
309 (% 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.
310 )))
311
312 [[image:1654849068701-275.png]]
313
314
315
316 == 2.3  ​Uplink Payload ==
317
318 (((
319 (((
320 LDDS20 will uplink payload via LoRaWAN with below payload format: 
321
322 Uplink payload includes in total 8 bytes.
323 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).
324 )))
325 )))
326
327 (((
328
329 )))
330
331 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
332 |=(% style="width: 62.5px;" %)(((
333 **Size (bytes)**
334 )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
335 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
336 [[Distance>>||anchor="H2.3.2A0Distance"]]
337
338 (unit: mm)
339 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
340 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
341 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
342
343 [[image:1654850511545-399.png]]
344
345
346
347 === 2.3.1  Battery Info ===
348
349
350 Check the battery voltage for LDDS20.
351
352 Ex1: 0x0B45 = 2885mV
353
354 Ex2: 0x0B49 = 2889mV
355
356
357
358 === 2.3.2  Distance ===
359
360 (((
361 Get the distance. Flat object range 20mm - 2000mm.
362 )))
363
364 (((
365 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.**
366 )))
367
368 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
369 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
370
371
372
373 === 2.3.3  Interrupt Pin ===
374
375 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.
376
377 **Example:**
378
379 0x00: Normal uplink packet.
380
381 0x01: Interrupt Uplink Packet.
382
383
384
385 === 2.3.4  DS18B20 Temperature sensor ===
386
387 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
388
389 **Example**:
390
391 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
392
393 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
394
395 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
396
397
398
399 === 2.3.5  Sensor Flag ===
400
401 (((
402 0x01: Detect Ultrasonic Sensor
403 )))
404
405 (((
406 0x00: No Ultrasonic Sensor
407 )))
408
409
410
411 === 2.3.6  Decode payload in The Things Network ===
412
413 While using TTN network, you can add the payload format to decode the payload.
414
415
416 [[image:1654850829385-439.png]]
417
418 The payload decoder function for TTN V3 is here:
419
420 (((
421 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/]]
422 )))
423
424
425
426 == 2.4  Downlink Payload ==
427
428 By default, LDDS20 prints the downlink payload to console port.
429
430 [[image:image-20220615100930-15.png]]
431
432
433 **Examples:**
434
435
436 * **Set TDC**
437
438 If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
439
440 Payload:    01 00 00 1E    TDC=30S
441
442 Payload:    01 00 00 3C    TDC=60S
443
444
445 * **Reset**
446
447 If payload = 0x04FF, it will reset the LDDS20
448
449
450 * **CFM**
451
452 Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
453
454
455
456 == 2.5  ​Show Data in DataCake IoT Server ==
457
458 (((
459 [[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:
460 )))
461
462 (((
463
464 )))
465
466 (((
467 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
468 )))
469
470 (((
471 (% 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:**
472 )))
473
474
475 [[image:1654592790040-760.png]]
476
477
478 [[image:1654592800389-571.png]]
479
480
481 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
482
483 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
484
485 [[image:1654851029373-510.png]]
486
487
488 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
489
490 [[image:image-20220610165129-11.png||height="595" width="1088"]]
491
492
493
494 == 2.6  Frequency Plans ==
495
496 (((
497 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.
498 )))
499
500
501
502 === 2.6.1  EU863-870 (EU868) ===
503
504 (((
505 (% style="color:blue" %)**Uplink:**
506 )))
507
508 (((
509 868.1 - SF7BW125 to SF12BW125
510 )))
511
512 (((
513 868.3 - SF7BW125 to SF12BW125 and SF7BW250
514 )))
515
516 (((
517 868.5 - SF7BW125 to SF12BW125
518 )))
519
520 (((
521 867.1 - SF7BW125 to SF12BW125
522 )))
523
524 (((
525 867.3 - SF7BW125 to SF12BW125
526 )))
527
528 (((
529 867.5 - SF7BW125 to SF12BW125
530 )))
531
532 (((
533 867.7 - SF7BW125 to SF12BW125
534 )))
535
536 (((
537 867.9 - SF7BW125 to SF12BW125
538 )))
539
540 (((
541 868.8 - FSK
542 )))
543
544 (((
545
546 )))
547
548 (((
549 (% style="color:blue" %)**Downlink:**
550 )))
551
552 (((
553 Uplink channels 1-9 (RX1)
554 )))
555
556 (((
557 869.525 - SF9BW125 (RX2 downlink only)
558 )))
559
560
561
562 === 2.6.2  US902-928(US915) ===
563
564 (((
565 Used in USA, Canada and South America. Default use CHE=2
566
567 (% style="color:blue" %)**Uplink:**
568
569 903.9 - SF7BW125 to SF10BW125
570
571 904.1 - SF7BW125 to SF10BW125
572
573 904.3 - SF7BW125 to SF10BW125
574
575 904.5 - SF7BW125 to SF10BW125
576
577 904.7 - SF7BW125 to SF10BW125
578
579 904.9 - SF7BW125 to SF10BW125
580
581 905.1 - SF7BW125 to SF10BW125
582
583 905.3 - SF7BW125 to SF10BW125
584
585
586 (% style="color:blue" %)**Downlink:**
587
588 923.3 - SF7BW500 to SF12BW500
589
590 923.9 - SF7BW500 to SF12BW500
591
592 924.5 - SF7BW500 to SF12BW500
593
594 925.1 - SF7BW500 to SF12BW500
595
596 925.7 - SF7BW500 to SF12BW500
597
598 926.3 - SF7BW500 to SF12BW500
599
600 926.9 - SF7BW500 to SF12BW500
601
602 927.5 - SF7BW500 to SF12BW500
603
604 923.3 - SF12BW500(RX2 downlink only)
605
606
607
608 )))
609
610 === 2.6.3  CN470-510 (CN470) ===
611
612 (((
613 Used in China, Default use CHE=1
614 )))
615
616 (((
617 (% style="color:blue" %)**Uplink:**
618 )))
619
620 (((
621 486.3 - SF7BW125 to SF12BW125
622 )))
623
624 (((
625 486.5 - SF7BW125 to SF12BW125
626 )))
627
628 (((
629 486.7 - SF7BW125 to SF12BW125
630 )))
631
632 (((
633 486.9 - SF7BW125 to SF12BW125
634 )))
635
636 (((
637 487.1 - SF7BW125 to SF12BW125
638 )))
639
640 (((
641 487.3 - SF7BW125 to SF12BW125
642 )))
643
644 (((
645 487.5 - SF7BW125 to SF12BW125
646 )))
647
648 (((
649 487.7 - SF7BW125 to SF12BW125
650 )))
651
652 (((
653
654 )))
655
656 (((
657 (% style="color:blue" %)**Downlink:**
658 )))
659
660 (((
661 506.7 - SF7BW125 to SF12BW125
662 )))
663
664 (((
665 506.9 - SF7BW125 to SF12BW125
666 )))
667
668 (((
669 507.1 - SF7BW125 to SF12BW125
670 )))
671
672 (((
673 507.3 - SF7BW125 to SF12BW125
674 )))
675
676 (((
677 507.5 - SF7BW125 to SF12BW125
678 )))
679
680 (((
681 507.7 - SF7BW125 to SF12BW125
682 )))
683
684 (((
685 507.9 - SF7BW125 to SF12BW125
686 )))
687
688 (((
689 508.1 - SF7BW125 to SF12BW125
690 )))
691
692 (((
693 505.3 - SF12BW125 (RX2 downlink only)
694 )))
695
696
697
698 === 2.6.4  AU915-928(AU915) ===
699
700 (((
701 Default use CHE=2
702
703 (% style="color:blue" %)**Uplink:**
704
705 916.8 - SF7BW125 to SF12BW125
706
707 917.0 - SF7BW125 to SF12BW125
708
709 917.2 - SF7BW125 to SF12BW125
710
711 917.4 - SF7BW125 to SF12BW125
712
713 917.6 - SF7BW125 to SF12BW125
714
715 917.8 - SF7BW125 to SF12BW125
716
717 918.0 - SF7BW125 to SF12BW125
718
719 918.2 - SF7BW125 to SF12BW125
720
721
722 (% style="color:blue" %)**Downlink:**
723
724 923.3 - SF7BW500 to SF12BW500
725
726 923.9 - SF7BW500 to SF12BW500
727
728 924.5 - SF7BW500 to SF12BW500
729
730 925.1 - SF7BW500 to SF12BW500
731
732 925.7 - SF7BW500 to SF12BW500
733
734 926.3 - SF7BW500 to SF12BW500
735
736 926.9 - SF7BW500 to SF12BW500
737
738 927.5 - SF7BW500 to SF12BW500
739
740 923.3 - SF12BW500(RX2 downlink only)
741
742
743
744 )))
745
746 === 2.6.5  AS920-923 & AS923-925 (AS923) ===
747
748 (((
749 (% style="color:blue" %)**Default Uplink channel:**
750 )))
751
752 (((
753 923.2 - SF7BW125 to SF10BW125
754 )))
755
756 (((
757 923.4 - SF7BW125 to SF10BW125
758 )))
759
760 (((
761
762 )))
763
764 (((
765 (% style="color:blue" %)**Additional Uplink Channel**:
766 )))
767
768 (((
769 (OTAA mode, channel added by JoinAccept message)
770 )))
771
772 (((
773
774 )))
775
776 (((
777 (% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
778 )))
779
780 (((
781 922.2 - SF7BW125 to SF10BW125
782 )))
783
784 (((
785 922.4 - SF7BW125 to SF10BW125
786 )))
787
788 (((
789 922.6 - SF7BW125 to SF10BW125
790 )))
791
792 (((
793 922.8 - SF7BW125 to SF10BW125
794 )))
795
796 (((
797 923.0 - SF7BW125 to SF10BW125
798 )))
799
800 (((
801 922.0 - SF7BW125 to SF10BW125
802 )))
803
804 (((
805
806 )))
807
808 (((
809 (% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
810 )))
811
812 (((
813 923.6 - SF7BW125 to SF10BW125
814 )))
815
816 (((
817 923.8 - SF7BW125 to SF10BW125
818 )))
819
820 (((
821 924.0 - SF7BW125 to SF10BW125
822 )))
823
824 (((
825 924.2 - SF7BW125 to SF10BW125
826 )))
827
828 (((
829 924.4 - SF7BW125 to SF10BW125
830 )))
831
832 (((
833 924.6 - SF7BW125 to SF10BW125
834 )))
835
836 (((
837
838 )))
839
840 (((
841 (% style="color:blue" %)**Downlink:**
842 )))
843
844 (((
845 Uplink channels 1-8 (RX1)
846 )))
847
848 (((
849 923.2 - SF10BW125 (RX2)
850 )))
851
852
853
854 === 2.6.6  KR920-923 (KR920) ===
855
856 (((
857 (% style="color:blue" %)**Default channel:**
858 )))
859
860 (((
861 922.1 - SF7BW125 to SF12BW125
862 )))
863
864 (((
865 922.3 - SF7BW125 to SF12BW125
866 )))
867
868 (((
869 922.5 - SF7BW125 to SF12BW125
870 )))
871
872 (((
873
874 )))
875
876 (((
877 (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
878 )))
879
880 (((
881 922.1 - SF7BW125 to SF12BW125
882 )))
883
884 (((
885 922.3 - SF7BW125 to SF12BW125
886 )))
887
888 (((
889 922.5 - SF7BW125 to SF12BW125
890 )))
891
892 (((
893 922.7 - SF7BW125 to SF12BW125
894 )))
895
896 (((
897 922.9 - SF7BW125 to SF12BW125
898 )))
899
900 (((
901 923.1 - SF7BW125 to SF12BW125
902 )))
903
904 (((
905 923.3 - SF7BW125 to SF12BW125
906 )))
907
908 (((
909
910 )))
911
912 (((
913 (% style="color:blue" %)**Downlink:**
914 )))
915
916 (((
917 Uplink channels 1-7(RX1)
918 )))
919
920 (((
921 921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)
922 )))
923
924
925
926 === 2.6.7  IN865-867 (IN865) ===
927
928 (((
929 (% style="color:blue" %)**Uplink:**
930 )))
931
932 (((
933 865.0625 - SF7BW125 to SF12BW125
934 )))
935
936 (((
937 865.4025 - SF7BW125 to SF12BW125
938 )))
939
940 (((
941 865.9850 - SF7BW125 to SF12BW125
942 )))
943
944 (((
945
946 )))
947
948 (((
949 (% style="color:blue" %)**Downlink:**
950 )))
951
952 (((
953 Uplink channels 1-3 (RX1)
954 )))
955
956 (((
957 866.550 - SF10BW125 (RX2)
958 )))
959
960
961
962 == 2.7  LED Indicator ==
963
964 The LDDS75 has an internal LED which is to show the status of different state.
965
966
967 * Blink once when device power on.
968 * The device detects the sensor and flashes 5 times.
969 * Solid ON for 5 seconds once device successful Join the network.
970 * Blink once when device transmit a packet.
971
972 == 2.8  ​Firmware Change Log ==
973
974
975 (((
976 **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/]]
977 )))
978
979 (((
980
981 )))
982
983 (((
984 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
985 )))
986
987
988
989 == 2.9  Mechanical ==
990
991
992 [[image:image-20220610172003-1.png]]
993
994
995 [[image:image-20220610172003-2.png]]
996
997
998
999 == 2.10  Battery Analysis ==
1000
1001 === 2.10.1  Battery Type ===
1002
1003 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.
1004
1005
1006 The battery related documents as below:
1007
1008 * (((
1009 [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1010 )))
1011 * (((
1012 [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1013 )))
1014 * (((
1015 [[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]]
1016 )))
1017
1018 [[image:image-20220610172400-3.png]]
1019
1020
1021
1022 === 2.10.2  Replace the battery ===
1023
1024 (((
1025 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.
1026 )))
1027
1028 (((
1029
1030 )))
1031
1032 (((
1033 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)
1034 )))
1035
1036
1037
1038 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
1039
1040 (((
1041 (((
1042 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
1043 )))
1044 )))
1045
1046 * (((
1047 (((
1048 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
1049 )))
1050 )))
1051 * (((
1052 (((
1053 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1054 )))
1055 )))
1056
1057 (((
1058 (((
1059
1060 )))
1061
1062 (((
1063 There are two kinds of commands to configure LDDS75, they are:
1064 )))
1065 )))
1066
1067 * (((
1068 (((
1069 (% style="color:#4f81bd" %)** General Commands**.
1070 )))
1071 )))
1072
1073 (((
1074 (((
1075 These commands are to configure:
1076 )))
1077 )))
1078
1079 * (((
1080 (((
1081 General system settings like: uplink interval.
1082 )))
1083 )))
1084 * (((
1085 (((
1086 LoRaWAN protocol & radio related command.
1087 )))
1088 )))
1089
1090 (((
1091 (((
1092 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]]
1093 )))
1094 )))
1095
1096 (((
1097 (((
1098
1099 )))
1100 )))
1101
1102 * (((
1103 (((
1104 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
1105 )))
1106 )))
1107
1108 (((
1109 (((
1110 These commands only valid for LDDS75, as below:
1111 )))
1112 )))
1113
1114
1115
1116 == 3.1  Access AT Commands ==
1117
1118 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.
1119
1120 [[image:image-20220610172924-4.png||height="483" width="988"]]
1121
1122
1123 Or if you have below board, use below connection:
1124
1125
1126 [[image:image-20220610172924-5.png]]
1127
1128
1129 (((
1130 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:
1131 )))
1132
1133
1134 [[image:image-20220610172924-6.png||height="601" width="860"]]
1135
1136
1137
1138 == 3.2  Set Transmit Interval Time ==
1139
1140 Feature: Change LoRaWAN End Node Transmit Interval.
1141
1142 (% style="color:#037691" %)**AT Command: AT+TDC**
1143
1144 [[image:image-20220610173409-7.png]]
1145
1146
1147 (((
1148 (% style="color:#037691" %)**Downlink Command: 0x01**
1149 )))
1150
1151 (((
1152 (((
1153 Format: Command Code (0x01) followed by 3 bytes time value.
1154
1155 (((
1156 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1157 )))
1158
1159 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1160 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1161 )))
1162 )))
1163
1164
1165
1166
1167
1168 == 3.3  Set Interrupt Mode ==
1169
1170 Feature, Set Interrupt mode for GPIO_EXIT.
1171
1172 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1173
1174 [[image:image-20220610174917-9.png]]
1175
1176
1177 (% style="color:#037691" %)**Downlink Command: 0x06**
1178
1179 Format: Command Code (0x06) followed by 3 bytes.
1180
1181 (((
1182 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1183 )))
1184
1185 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1186 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1187
1188 = 4.  FAQ =
1189
1190 == 4.1  What is the frequency plan for LDDS75? ==
1191
1192 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"]]
1193
1194
1195
1196 == 4.2  How to change the LoRa Frequency Bands/Region ==
1197
1198 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1199 When downloading the images, choose the required image file for download. ​
1200
1201
1202
1203 == 4.3  Can I use LDDS75 in condensation environment? ==
1204
1205 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1206
1207
1208
1209 = 5.  Trouble Shooting =
1210
1211 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1212
1213 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1214
1215
1216 == 5.2  AT Command input doesn't work ==
1217
1218 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.
1219
1220 (((
1221
1222 )))
1223
1224
1225 = 6.  Order Info =
1226
1227
1228 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1229
1230
1231 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1232
1233 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1234 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1235 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1236 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1237 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1238 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1239 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1240 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1241
1242 (% style="color:blue" %)**YY**(%%): Battery Option
1243
1244 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1245 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1246
1247 = 7. ​ Packing Info =
1248
1249
1250 **Package Includes**:
1251
1252 * LDDS75 LoRaWAN Distance Detection Sensor x 1
1253
1254 **Dimension and weight**:
1255
1256 * Device Size: cm
1257 * Device Weight: g
1258 * Package Size / pcs : cm
1259 * Weight / pcs : g
1260
1261 = 8.  ​Support =
1262
1263 * 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.
1264 * 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]].