<
From version < 97.9 >
edited by Xiaoling
on 2022/07/09 11:30
To version < 100.5 >
edited by Xiaoling
on 2022/08/22 14:39
>
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -16,6 +16,7 @@
16 16  
17 17  = 1.  Introduction =
18 18  
19 +
19 19  == 1.1 ​ What is NDDS75 Distance Detection Sensor ==
20 20  
21 21  (((
... ... @@ -22,14 +22,31 @@
22 22  
23 23  
24 24  (((
26 +(((
25 25  The Dragino NDDS75 is a (% style="color:blue" %)**NB-IoT Distance Detection Sensor**(%%) for Internet of Things solution. It is designed to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses ultrasonic sensing technology for distance measurement, and temperature compensation is performed internally to improve the reliability of data.
26 -\\The NDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc. It detects the distance between the measured object and the sensor, and uploads the value via wireless to IoT Server via NB-IoT Network.
27 -\\NarrowBand-Internet of Things (NB-IoT) is a standards-based low power wide area (LPWA) technology developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity and spectrum efficiency, especially in deep coverage.
28 -\\NDDS75 supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP and CoAP** (%%)for different application requirement.
29 -\\NDDS75 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
30 -\\To use NDDS75, user needs to check if there is NB-IoT coverage in local area and with the bands NDDS75 supports. If the local operate support it, user needs to get a NB-IoT SIM card from local operator and install NDDS75 to get NB-IoT network connection.
31 31  )))
32 32  
30 +(((
31 +The NDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc. It detects the distance between the measured object and the sensor, and uploads the value via wireless to IoT Server via NB-IoT Network.
32 +)))
33 +
34 +(((
35 +NarrowBand-Internet of Things (NB-IoT) is a standards-based low power wide area (LPWA) technology developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity and spectrum efficiency, especially in deep coverage.
36 +)))
37 +
38 +(((
39 +NDDS75 supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP and CoAP** (%%)for different application requirement.
40 +)))
41 +
42 +(((
43 +NDDS75 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
44 +)))
45 +
46 +(((
47 +To use NDDS75, user needs to check if there is NB-IoT coverage in local area and with the bands NDDS75 supports. If the local operate support it, user needs to get a NB-IoT SIM card from local operator and install NDDS75 to get NB-IoT network connection.
48 +)))
49 +)))
50 +
33 33  
34 34  )))
35 35  
... ... @@ -55,6 +55,7 @@
55 55  
56 56  
57 57  
76 +
58 58  == 1.3  Specification ==
59 59  
60 60  
... ... @@ -63,6 +63,7 @@
63 63  * Supply Voltage: 2.1v ~~ 3.6v
64 64  * Operating Temperature: -40 ~~ 85°C
65 65  
85 +
66 66  (% style="color:#037691" %)**NB-IoT Spec:**
67 67  
68 68  * - B1 @H-FDD: 2100MHz
... ... @@ -72,6 +72,7 @@
72 72  * - B20 @H-FDD: 800MHz
73 73  * - B28 @H-FDD: 700MHz
74 74  
95 +
75 75  (% style="color:#037691" %)**Battery:**
76 76  
77 77  * Li/SOCI2 un-chargeable battery
... ... @@ -80,6 +80,7 @@
80 80  * Max continuously current: 130mA
81 81  * Max boost current: 2A, 1 second
82 82  
104 +
83 83  (% style="color:#037691" %)**Power Consumption**
84 84  
85 85  * STOP Mode: 10uA @ 3.3v
... ... @@ -87,8 +87,10 @@
87 87  
88 88  
89 89  
112 +
90 90  == ​1.4  Applications ==
91 91  
115 +
92 92  * Smart Buildings & Home Automation
93 93  * Logistics and Supply Chain Management
94 94  * Smart Metering
... ... @@ -100,6 +100,8 @@
100 100  ​
101 101  
102 102  
127 +
128 +
103 103  == 1.5  Pin Definitions ==
104 104  
105 105  
... ... @@ -109,8 +109,10 @@
109 109  
110 110  = 2.  Use NDDS75 to communicate with IoT Server =
111 111  
138 +
112 112  == 2.1  How it works ==
113 113  
141 +
114 114  (((
115 115  The NDDS75 is equipped with a NB-IoT module, the pre-loaded firmware in NDDS75 will get environment data from sensors and send the value to local NB-IoT network via the NB-IoT module.  The NB-IoT network will forward this value to IoT server via the protocol defined by NDDS75.
116 116  )))
... ... @@ -136,16 +136,17 @@
136 136  
137 137  === 2.2.1 Test Requirement ===
138 138  
167 +
139 139  (((
140 140  To use NDDS75 in your city, make sure meet below requirements:
141 141  )))
142 142  
143 143  * Your local operator has already distributed a NB-IoT Network there.
144 -* The local NB-IoT network used the band that NSE01 supports.
173 +* The local NB-IoT network used the band that NDDS75 supports.
145 145  * Your operator is able to distribute the data received in their NB-IoT network to your IoT server.
146 146  
147 147  (((
148 -Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NDDS75 will use CoAP((% style="color:red" %)120.24.4.116:5683)(%%) or raw UDP((% style="color:red" %)120.24.4.116:5601)(%%) or MQTT((% style="color:red" %)120.24.4.116:1883)(%%)or TCP((% style="color:red" %)120.24.4.116:5600)(%%)protocol to send data to the test server
177 +Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NDDS75 will use CoAP((% style="color:red" %)120.24.4.116:5683)(%%) or raw UDP((% style="color:red" %)120.24.4.116:5601)(%%) or MQTT((% style="color:red" %)120.24.4.116:1883)(%%)or TCP((% style="color:red" %)120.24.4.116:5600)(%%)protocol to send data to the test server.
149 149  )))
150 150  
151 151  
... ... @@ -155,6 +155,7 @@
155 155  
156 156  === 2.2.2 Insert SIM card ===
157 157  
187 +
158 158  (((
159 159  Insert the NB-IoT Card get from your provider.
160 160  )))
... ... @@ -170,6 +170,7 @@
170 170  
171 171  === 2.2.3 Connect USB – TTL to NDDS75 to configure it ===
172 172  
203 +
173 173  (((
174 174  (((
175 175  User need to configure NDDS75 via serial port to set the (% style="color:blue" %)**Server Address** / **Uplink Topic** (%%)to define where and how-to uplink packets. NDDS75 support AT Commands, user can use a USB to TTL adapter to connect to NDDS75 and use AT Commands to configure it, as below.
... ... @@ -178,6 +178,7 @@
178 178  
179 179  [[image:image-20220709092052-2.png]]
180 180  
212 +
181 181  **Connection:**
182 182  
183 183   (% style="background-color:yellow" %)USB TTL GND <~-~-~-~-> GND
... ... @@ -201,8 +201,9 @@
201 201  
202 202  [[image:1657329814315-101.png]]
203 203  
236 +
204 204  (((
205 -(% style="color:red" %)Note: the valid AT Commands can be found at: (%%)[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/]]
238 +(% style="color:red" %)**Note: the valid AT Commands can be found at: **(%%)**[[https:~~/~~/www.dropbox.com/sh/aaq2xcl0bzfu0yd/AAAEAHRa7Io_465ds4Y7-F3aa?dl=0>>https://www.dropbox.com/sh/aaq2xcl0bzfu0yd/AAAEAHRa7Io_465ds4Y7-F3aa?dl=0]]**
206 206  )))
207 207  
208 208  
... ... @@ -209,9 +209,10 @@
209 209  
210 210  === 2.2.4 Use CoAP protocol to uplink data ===
211 211  
212 -(% style="color:red" %)Note: if you don't have CoAP server, you can refer this link to set up one: (%%)[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/>>http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]
213 213  
246 +(% style="color:red" %)**Note: if you don't have CoAP server, you can refer this link to set up one: **(%%)**[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/>>http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]**
214 214  
248 +
215 215  (((
216 216  **Use below commands:**
217 217  )))
... ... @@ -233,7 +233,10 @@
233 233  [[image:1657330452568-615.png]]
234 234  
235 235  
270 +
271 +(((
236 236  After configure the server address and (% style="color:green" %)**reset the device**(%%) (via AT+ATZ ), NDDS75 will start to uplink sensor values to CoAP server.
273 +)))
237 237  
238 238  [[image:1657330472797-498.png]]
239 239  
... ... @@ -246,6 +246,7 @@
246 246  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5601   ** (%%) ~/~/ to set UDP server address and port
247 247  * (% style="color:blue" %)**AT+CFM=1       ** (%%) ~/~/ If the server does not respond, this command is unnecessary
248 248  
286 +
249 249  [[image:1657330501006-241.png]]
250 250  
251 251  
... ... @@ -256,14 +256,15 @@
256 256  === 2.2.6 Use MQTT protocol to uplink data ===
257 257  
258 258  
259 -* (% style="color:blue" %)**AT+PRO=3   ** (%%) ~/~/Set to use MQTT protocol to uplink
260 -* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,1883   ** (%%) ~/~/Set MQTT server address and port
261 -* (% style="color:blue" %)**AT+CLIENT=CLIENT       ** (%%)~/~/Set up the CLIENT of MQTT
262 -* (% style="color:blue" %)**AT+UNAME=UNAME                               **(%%)~/~/Set the username of MQTT
263 -* (% style="color:blue" %)**AT+PWD=PWD                                        **(%%)~/~/Set the password of MQTT
297 +* (% style="color:blue" %)**AT+PRO=3   ** (%%) ~/~/Set to use MQTT protocol to uplink
298 +* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,1883   ** (%%) ~/~/Set MQTT server address and port
299 +* (% style="color:blue" %)**AT+CLIENT=CLIENT       ** (%%)~/~/Set up the CLIENT of MQTT
300 +* (% style="color:blue" %)**AT+UNAME=UNAME                                **(%%)~/~/Set the username of MQTT
301 +* (% style="color:blue" %)**AT+PWD=PWD                                         **(%%)~/~/Set the password of MQTT
264 264  * (% style="color:blue" %)**AT+PUBTOPIC=NDDS75_PUB                 **(%%)~/~/Set the sending topic of MQTT
265 265  * (% style="color:blue" %)**AT+SUBTOPIC=NDDS75_SUB          **(%%) ~/~/Set the subscription topic of MQTT
266 266  
305 +
267 267  [[image:1657249978444-674.png]]
268 268  
269 269  
... ... @@ -282,6 +282,7 @@
282 282  * (% style="color:blue" %)**AT+PRO=4   ** (%%) ~/~/ Set to use TCP protocol to uplink
283 283  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5600   **(%%) ~/~/ to set TCP server address and port
284 284  
324 +
285 285  [[image:image-20220709093918-1.png]]
286 286  
287 287  
... ... @@ -291,6 +291,7 @@
291 291  
292 292  === 2.2.8 Change Update Interval ===
293 293  
334 +
294 294  User can use below command to change the (% style="color:green" %)**uplink interval**.
295 295  
296 296  * (% style="color:blue" %)**AT+TDC=600      ** (%%)~/~/ Set Update Interval to 600s
... ... @@ -300,7 +300,7 @@
300 300  )))
301 301  
302 302  (((
303 -(% style="color:red" %)1. By default, the device will send an uplink message every 1 hour.
344 +(% style="color:red" %)**1. By default, the device will send an uplink message every 1 hour.**
304 304  )))
305 305  
306 306  
... ... @@ -307,13 +307,14 @@
307 307  
308 308  == 2.3  Uplink Payload ==
309 309  
351 +
310 310  In this mode, uplink payload includes in total 14 bytes
311 311  
312 312  
313 -(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
314 -|=(% style="width: 80px;" %)(((
355 +(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:440px" %)
356 +|=(% style="width: 60px;" %)(((
315 315  **Size(bytes)**
316 -)))|=(% style="width: 80px;" %)**6**|=(% style="width: 35px;" %)2|=(% style="width: 35px;" %)**2**|=(% style="width: 110px;" %)**1**|=(% style="width: 110px;" %)**2**|=(% style="width: 70px;" %)**1**
358 +)))|=(% style="width: 60px;" %)**6**|=(% style="width: 35px;" %)2|=(% style="width: 35px;" %)**2**|=(% style="width: 80px;" %)**1**|=(% style="width: 100px;" %)**2**|=(% style="width: 60px;" %)**1**
317 317  |(% style="width:97px" %)**Value**|(% style="width:83px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:41px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:46px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:123px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:120px" %)[[Distance (unit: mm)>>||anchor="H2.4.5A0Distance"]]|(% style="width:80px" %)[[Interrupt>>||anchor="H2.4.6A0DigitalInterrupt"]]
318 318  
319 319  (((
... ... @@ -323,6 +323,7 @@
323 323  
324 324  [[image:1657331036973-987.png]]
325 325  
368 +
326 326  (((
327 327  The payload is ASCII string, representative same HEX:
328 328  )))
... ... @@ -360,6 +360,7 @@
360 360  
361 361  === 2.4.1  Device ID ===
362 362  
406 +
363 363  (((
364 364  By default, the Device ID equal to the last 6 bytes of IMEI.
365 365  )))
... ... @@ -366,6 +366,8 @@
366 366  
367 367  (((
368 368  User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID
413 +
414 +
369 369  )))
370 370  
371 371  (((
... ... @@ -384,6 +384,7 @@
384 384  
385 385  === 2.4.2  Version Info ===
386 386  
433 +
387 387  (((
388 388  Specify the software version: 0x64=100, means firmware version 1.00.
389 389  )))
... ... @@ -396,6 +396,7 @@
396 396  
397 397  === 2.4.3  Battery Info ===
398 398  
446 +
399 399  (((
400 400  Ex1: 0x0B45 = 2885mV
401 401  )))
... ... @@ -408,6 +408,7 @@
408 408  
409 409  === 2.4.4  Signal Strength ===
410 410  
459 +
411 411  (((
412 412  NB-IoT Network signal Strength.
413 413  )))
... ... @@ -440,9 +440,12 @@
440 440  
441 441  === 2.4.5  Distance ===
442 442  
492 +
443 443  Get the distance. Flat object range 280mm - 7500mm.
444 444  
495 +(((
445 445  For example, if the data you get from the register is **__0x0B 0x05__**, the distance between the sensor and the measured object is
497 +)))
446 446  
447 447  (((
448 448  (((
... ... @@ -460,6 +460,7 @@
460 460  
461 461  === 2.4.6  Digital Interrupt ===
462 462  
515 +
463 463  (((
464 464  Digital Interrupt refers to pin (% style="color:blue" %)**GPIO_EXTI**(%%), and there are different trigger methods. When there is a trigger, the NDDS75 will send a packet to the server.
465 465  )))
... ... @@ -494,6 +494,7 @@
494 494  
495 495  === 2.4.7  ​+5V Output ===
496 496  
550 +
497 497  (((
498 498  NDDS75 will enable +5V output before all sampling and disable the +5v after all sampling. 
499 499  )))
... ... @@ -501,10 +501,14 @@
501 501  
502 502  (((
503 503  The 5V output time can be controlled by AT Command.
558 +
559 +
504 504  )))
505 505  
506 506  (((
507 507  (% style="color:blue" %)**AT+5VT=1000**
564 +
565 +
508 508  )))
509 509  
510 510  (((
... ... @@ -515,6 +515,7 @@
515 515  
516 516  == 2.5  Downlink Payload ==
517 517  
576 +
518 518  By default, NDDS75 prints the downlink payload to console port.
519 519  
520 520  [[image:image-20220709100028-1.png]]
... ... @@ -585,19 +585,23 @@
585 585  == 2.7  ​Firmware Change Log ==
586 586  
587 587  
588 -Download URL & Firmware Change log
647 +(((
648 +Download URL & Firmware Change log:  [[https:~~/~~/www.dropbox.com/sh/3hb94r49iszmstx/AADvSJcXxahEUfxqKWVnZx-La?dl=0>>https://www.dropbox.com/sh/3hb94r49iszmstx/AADvSJcXxahEUfxqKWVnZx-La?dl=0]]
649 +)))
589 589  
590 590  (((
591 -[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/]]
652 +
592 592  )))
593 593  
655 +(((
656 +Upgrade Instruction: [[Upgrade Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
657 +)))
594 594  
595 -Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
596 596  
597 597  
598 -
599 599  == 2.8  ​Battery Analysis ==
600 600  
663 +
601 601  === 2.8.1  ​Battery Type ===
602 602  
603 603  
... ... @@ -625,6 +625,7 @@
625 625  
626 626  === 2.8.2  Power consumption Analyze ===
627 627  
691 +
628 628  (((
629 629  Dragino battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
630 630  )))
... ... @@ -663,6 +663,7 @@
663 663  
664 664  === 2.8.3  ​Battery Note ===
665 665  
730 +
666 666  (((
667 667  The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
668 668  )))
... ... @@ -671,6 +671,7 @@
671 671  
672 672  === 2.8.4  Replace the battery ===
673 673  
739 +
674 674  (((
675 675  The default battery pack of NDDS75 includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).
676 676  )))
... ... @@ -679,6 +679,7 @@
679 679  
680 680  = 3. ​ Access NB-IoT Module =
681 681  
748 +
682 682  (((
683 683  Users can directly access the AT command set of the NB-IoT module.
684 684  )))
... ... @@ -685,6 +685,8 @@
685 685  
686 686  (((
687 687  The AT Command set can refer the BC35-G NB-IoT Module AT Command: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=datasheet/other_vendors/BC35-G/>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/other_vendors/BC35-G/]] 
755 +
756 +
688 688  )))
689 689  
690 690  [[image:1657333200519-600.png]]
... ... @@ -693,11 +693,13 @@
693 693  
694 694  = 4.  Using the AT Commands =
695 695  
765 +
696 696  == 4.1  Access AT Commands ==
697 697  
698 -See this link for detail: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/>>url:http://www.dragino.com/downloads/index.php?dir=NB-IoT/NBSN50/]]
699 699  
769 +See this link for detail:  [[https:~~/~~/www.dropbox.com/sh/aaq2xcl0bzfu0yd/AAAEAHRa7Io_465ds4Y7-F3aa?dl=0>>https://www.dropbox.com/sh/aaq2xcl0bzfu0yd/AAAEAHRa7Io_465ds4Y7-F3aa?dl=0]]
700 700  
771 +
701 701  AT+<CMD>?  : Help on <CMD>
702 702  
703 703  AT+<CMD>         : Run <CMD>
... ... @@ -771,6 +771,7 @@
771 771  
772 772  = ​5.  FAQ =
773 773  
845 +
774 774  == 5.1 ​ How to Upgrade Firmware ==
775 775  
776 776  
... ... @@ -783,7 +783,7 @@
783 783  )))
784 784  
785 785  (((
786 -(% style="color:red" %)Notice, NDDS75 and LDDS75 share the same mother board. They use the same connection and method to update.
858 +(% style="color:red" %)**Notice, NDDS75 and LDDS75 share the same mother board. They use the same connection and method to update.**
787 787  )))
788 788  
789 789  
... ... @@ -790,6 +790,7 @@
790 790  
791 791  = 6.  Trouble Shooting =
792 792  
865 +
793 793  == 6.1  ​Connection problem when uploading firmware ==
794 794  
795 795  
... ... @@ -805,6 +805,7 @@
805 805  
806 806  == 6.2  AT Command input doesn't work ==
807 807  
881 +
808 808  (((
809 809  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.
810 810  
... ... @@ -830,7 +830,7 @@
830 830  
831 831  (% style="color:#037691" %)**Package Includes**:
832 832  
833 -* NSE01 NB-IoT Distance Detect Sensor Node x 1
907 +* NDDS75 NB-IoT Distance Detect Sensor Node x 1
834 834  * External antenna x 1
835 835  )))
836 836  
... ... @@ -839,7 +839,6 @@
839 839  
840 840  (% style="color:#037691" %)**Dimension and weight**:
841 841  
842 -
843 843  * Device Size: 13.0 x 5 x 4.5 cm
844 844  * Device Weight: 150g
845 845  * Package Size / pcs : 15 x 12x 5.5 cm
... ... @@ -855,5 +855,8 @@
855 855  
856 856  = 9.  Support =
857 857  
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858 858  * 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.
859 859  * 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]]
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