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Version 174.5 by Xiaoling on 2022/06/15 10:31
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1 (% style="text-align:center" %)
2 [[image:1655254599445-662.png]]
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5
6
7 **Table of Contents:**
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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
366
367 === 2.3.3  Interrupt Pin ===
368
369 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.
370
371 **Example:**
372
373 0x00: Normal uplink packet.
374
375 0x01: Interrupt Uplink Packet.
376
377
378
379 === 2.3.4  DS18B20 Temperature sensor ===
380
381 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
382
383 **Example**:
384
385 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
386
387 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
388
389 (% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
390
391
392
393 === 2.3.5  Sensor Flag ===
394
395 (((
396 0x01: Detect Ultrasonic Sensor
397 )))
398
399 (((
400 0x00: No Ultrasonic Sensor
401 )))
402
403
404
405 === 2.3.6  Decode payload in The Things Network ===
406
407 While using TTN network, you can add the payload format to decode the payload.
408
409
410 [[image:1654850829385-439.png]]
411
412 The payload decoder function for TTN V3 is here:
413
414 (((
415 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/]]
416 )))
417
418
419
420 == 2.4  Downlink Payload ==
421
422 By default, LDDS20 prints the downlink payload to console port.
423
424 [[image:image-20220615100930-15.png]]
425
426
427 **Examples:**
428
429
430 * (% style="color:blue" %)**Set TDC**
431
432 If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
433
434 Payload:    01 00 00 1E    TDC=30S
435
436 Payload:    01 00 00 3C    TDC=60S
437
438
439 * (% style="color:blue" %)**Reset**
440
441 If payload = 0x04FF, it will reset the LDDS20
442
443
444 * (% style="color:blue" %)**CFM**
445
446 Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
447
448
449
450 == 2.5  ​Show Data in DataCake IoT Server ==
451
452 (((
453 [[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:
454 )))
455
456 (((
457
458 )))
459
460 (((
461 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
462 )))
463
464 (((
465 (% 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:**
466 )))
467
468
469 [[image:1654592790040-760.png]]
470
471
472 [[image:1654592800389-571.png]]
473
474
475 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
476
477 (% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
478
479 [[image:1654851029373-510.png]]
480
481
482 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
483
484 [[image:image-20220610165129-11.png||height="595" width="1088"]]
485
486
487
488 == 2.6  LED Indicator ==
489
490 The LDDS20 has an internal LED which is to show the status of different state.
491
492
493 * Blink once when device power on.
494 * The device detects the sensor and flashes 5 times.
495 * Solid ON for 5 seconds once device successful Join the network.
496 * Blink once when device transmit a packet.
497
498
499
500 == 2.7  ​Firmware Change Log ==
501
502
503 (((
504 **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/]]
505 )))
506
507 (((
508
509 )))
510
511 (((
512 **Firmware Upgrade Method:  [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]**
513 )))
514
515
516
517 == 2.8  Battery Analysis ==
518
519
520
521
522 === 2.8.1  Battery Type ===
523
524 The LDDS20 battery is a combination of a 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.
525
526
527 The battery related documents as below:
528
529 * (((
530 [[Battery Dimension>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]],
531 )))
532 * (((
533 [[Lithium-Thionyl Chloride Battery  datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]],
534 )))
535 * (((
536 [[Lithium-ion Battery-Capacitor datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
537 )))
538
539 [[image:image-20220615102527-16.png]]
540
541
542
543
544 === 2.10.2  Replace the battery ===
545
546 (((
547 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.
548 )))
549
550 (((
551
552 )))
553
554 (((
555 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)
556 )))
557
558
559
560 = 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
561
562 (((
563 (((
564 Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
565 )))
566 )))
567
568 * (((
569 (((
570 AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
571 )))
572 )))
573 * (((
574 (((
575 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
576 )))
577 )))
578
579 (((
580 (((
581
582 )))
583
584 (((
585 There are two kinds of commands to configure LDDS75, they are:
586 )))
587 )))
588
589 * (((
590 (((
591 (% style="color:#4f81bd" %)** General Commands**.
592 )))
593 )))
594
595 (((
596 (((
597 These commands are to configure:
598 )))
599 )))
600
601 * (((
602 (((
603 General system settings like: uplink interval.
604 )))
605 )))
606 * (((
607 (((
608 LoRaWAN protocol & radio related command.
609 )))
610 )))
611
612 (((
613 (((
614 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]]
615 )))
616 )))
617
618 (((
619 (((
620
621 )))
622 )))
623
624 * (((
625 (((
626 (% style="color:#4f81bd" %)** Commands special design for LDDS75**
627 )))
628 )))
629
630 (((
631 (((
632 These commands only valid for LDDS75, as below:
633 )))
634 )))
635
636
637
638 == 3.1  Access AT Commands ==
639
640 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.
641
642 [[image:image-20220610172924-4.png||height="483" width="988"]]
643
644
645 Or if you have below board, use below connection:
646
647
648 [[image:image-20220610172924-5.png]]
649
650
651 (((
652 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:
653 )))
654
655
656 [[image:image-20220610172924-6.png||height="601" width="860"]]
657
658
659
660 == 3.2  Set Transmit Interval Time ==
661
662 Feature: Change LoRaWAN End Node Transmit Interval.
663
664 (% style="color:#037691" %)**AT Command: AT+TDC**
665
666 [[image:image-20220610173409-7.png]]
667
668
669 (((
670 (% style="color:#037691" %)**Downlink Command: 0x01**
671 )))
672
673 (((
674 (((
675 Format: Command Code (0x01) followed by 3 bytes time value.
676
677 (((
678 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
679 )))
680
681 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
682 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
683 )))
684 )))
685
686
687
688
689
690 == 3.3  Set Interrupt Mode ==
691
692 Feature, Set Interrupt mode for GPIO_EXIT.
693
694 (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
695
696 [[image:image-20220610174917-9.png]]
697
698
699 (% style="color:#037691" %)**Downlink Command: 0x06**
700
701 Format: Command Code (0x06) followed by 3 bytes.
702
703 (((
704 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
705 )))
706
707 * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
708 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
709
710 = 4.  FAQ =
711
712 == 4.1  What is the frequency plan for LDDS75? ==
713
714 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"]]
715
716
717
718 == 4.2  How to change the LoRa Frequency Bands/Region ==
719
720 You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
721 When downloading the images, choose the required image file for download. ​
722
723
724
725 == 4.3  Can I use LDDS75 in condensation environment? ==
726
727 LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
728
729
730
731 = 5.  Trouble Shooting =
732
733 == 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
734
735 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
736
737
738 == 5.2  AT Command input doesn't work ==
739
740 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.
741
742 (((
743
744 )))
745
746
747 = 6.  Order Info =
748
749
750 Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
751
752
753 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
754
755 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
756 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
757 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
758 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
759 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
760 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
761 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
762 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
763
764 (% style="color:blue" %)**YY**(%%): Battery Option
765
766 * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
767 * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
768
769 = 7. ​ Packing Info =
770
771
772 **Package Includes**:
773
774 * LDDS75 LoRaWAN Distance Detection Sensor x 1
775
776 **Dimension and weight**:
777
778 * Device Size: cm
779 * Device Weight: g
780 * Package Size / pcs : cm
781 * Weight / pcs : g
782
783 = 8.  ​Support =
784
785 * 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.
786 * 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]].