Last modified by Mengting Qiu on 2024/04/02 16:44
<
From version < 129.2 >
edited by Xiaoling
on 2022/10/14 17:59
To version < 130.1 >
edited by Bei Jinggeng
on 2023/04/19 14:36
>
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
... ... @@ -17,7 +17,6 @@
17 17  
18 18  = 1.  Introduction =
19 19  
20 -
21 21  == 1.1 ​ What is N95S31B NB-IoT Sensor Node ==
22 22  
23 23  (((
... ... @@ -69,7 +69,6 @@
69 69  * 8500mAh Battery for long term use
70 70  
71 71  
72 -
73 73  == 1.3  Specification ==
74 74  
75 75  
... ... @@ -80,12 +80,12 @@
80 80  
81 81  (% style="color:#037691" %)**NB-IoT Spec:**
82 82  
83 -* - B1 @H-FDD: 2100MHz
84 -* - B3 @H-FDD: 1800MHz
85 -* - B8 @H-FDD: 900MHz
86 -* - B5 @H-FDD: 850MHz
87 -* - B20 @H-FDD: 800MHz
88 -* - B28 @H-FDD: 700MHz
81 +* B1 @H-FDD: 2100MHz
82 +* B3 @H-FDD: 1800MHz
83 +* B8 @H-FDD: 900MHz
84 +* B5 @H-FDD: 850MHz
85 +* B20 @H-FDD: 800MHz
86 +* B28 @H-FDD: 700MHz
89 89  
90 90  (% style="color:#037691" %)**Battery:**
91 91  
... ... @@ -96,7 +96,6 @@
96 96  * Max boost current: 2A, 1 second
97 97  
98 98  
99 -
100 100  == ​1.4  Applications ==
101 101  
102 102  
... ... @@ -111,7 +111,6 @@
111 111  ​
112 112  
113 113  
114 -
115 115  == 1.5  Pin Definitions & Switch ==
116 116  
117 117  
... ... @@ -121,7 +121,6 @@
121 121  [[image:image-20220709144723-1.png]]
122 122  
123 123  
124 -
125 125  === 1.5.1 Jumper JP2 ===
126 126  
127 127  
... ... @@ -128,20 +128,18 @@
128 128  Power on Device when put this jumper.
129 129  
130 130  
131 -
132 132  === 1.5.2 BOOT MODE / SW1 ===
133 133  
134 134  
135 135  (((
136 -1) ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
130 +**1) ISP: ** upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
137 137  )))
138 138  
139 139  (((
140 -2) Flash: work mode, device starts to work and send out console output for further debug
134 +**2) Flash:**  work mode, device starts to work and send out console output for further debug
141 141  )))
142 142  
143 143  
144 -
145 145  === 1.5.3 Reset Button ===
146 146  
147 147  
... ... @@ -148,20 +148,18 @@
148 148  Press to reboot the device.
149 149  
150 150  
151 -
152 152  === 1.5.4 LED ===
153 153  
154 154  
155 155  It will flash:
156 156  
157 -1. When boot the device in flash mode
158 -1. Send an uplink packet
149 +1.  When boot the device in flash mode
159 159  
151 +2.  Send an uplink packet
160 160  
161 161  
162 162  = 2.  Use N95S31B to communicate with IoT Server =
163 163  
164 -
165 165  == 2.1  How it works ==
166 166  
167 167  
... ... @@ -187,7 +187,6 @@
187 187  
188 188  == 2.2 ​ Configure the N95S31B ==
189 189  
190 -
191 191  === 2.2.1  Power On N95S31B ===
192 192  
193 193  
... ... @@ -194,10 +194,9 @@
194 194  [[image:image-20220709150546-2.png]]
195 195  
196 196  
187 +=== 2.2.2 Test Requirement ===
197 197  
198 -=== 2.2.1 Test Requirement ===
199 199  
200 -
201 201  (((
202 202  To use N95S31B in your city, make sure meet below requirements:
203 203  )))
... ... @@ -244,7 +244,6 @@
244 244  [[image:1657350625843-586.png]]
245 245  
246 246  
247 -
248 248  === 2.2.3  Insert SIM card ===
249 249  
250 250  
... ... @@ -260,7 +260,6 @@
260 260  [[image:1657351240556-536.png]]
261 261  
262 262  
263 -
264 264  === 2.2.4  Connect USB – TTL to N95S31B to configure it ===
265 265  
266 266  
... ... @@ -275,13 +275,13 @@
275 275  [[image:1657351312545-300.png]]
276 276  
277 277  
278 -**Connection:**
265 +(% style="color:blue" %)**Connection:**
279 279  
280 - (% style="background-color:yellow" %)USB TTL GND <~-~-~-~-> GND
267 + (% style="background-color:yellow" %)**USB TTL GND <~-~-~-~-> GND**
281 281  
282 - (% style="background-color:yellow" %)USB TTL TXD <~-~-~-~-> UART_RXD
269 +**~ (% style="background-color:yellow" %)USB TTL TXD <~-~-~-~-> UART_RXD(%%)**
283 283  
284 - (% style="background-color:yellow" %)USB TTL RXD <~-~-~-~-> UART_TXD
271 +**~ (% style="background-color:yellow" %)USB TTL RXD <~-~-~-~-> UART_TXD(%%)**
285 285  
286 286  
287 287  In the PC, use below serial tool settings:
... ... @@ -304,7 +304,6 @@
304 304  )))
305 305  
306 306  
307 -
308 308  === 2.2.5  Use CoAP protocol to uplink data ===
309 309  
310 310  
... ... @@ -341,7 +341,6 @@
341 341  [[image:1657352185396-303.png]]
342 342  
343 343  
344 -
345 345  === 2.2.6  Use UDP protocol to uplink data(Default protocol) ===
346 346  
347 347  
... ... @@ -355,19 +355,18 @@
355 355  [[image:1657352403317-397.png]]
356 356  
357 357  
358 -
359 359  === 2.2.7  Use MQTT protocol to uplink data ===
360 360  
361 361  
362 362  N95S31B supports only plain MQTT now it doesn't support TLS and other related encryption.
363 363  
364 -* (% style="color:blue" %)**AT+PRO=3   ** (%%) ~/~/Set to use MQTT protocol to uplink
365 -* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,1883   ** (%%) ~/~/Set MQTT server address and port
366 -* (% style="color:blue" %)**AT+CLIENT=CLIENT       ** (%%)~/~/Set up the CLIENT of MQTT
367 -* (% style="color:blue" %)**AT+UNAME=UNAME                                **(%%)~/~/Set the username of MQTT
368 -* (% style="color:blue" %)**AT+PWD=PWD                                         **(%%)~/~/Set the password of MQTT
369 -* (% style="color:blue" %)**AT+PUBTOPIC=f9527                               **(%%)~/~/Set the sending topic of MQTT
370 -* (% style="color:blue" %)**AT+SUBTOPIC=Ns9527          **(%%) ~/~/Set the subscription topic of MQTT
348 +* (% style="color:blue" %)**AT+PRO=3   ** (%%) ~/~/  Set to use MQTT protocol to uplink
349 +* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,1883   ** (%%) ~/~/  Set MQTT server address and port
350 +* (% style="color:blue" %)**AT+CLIENT=CLIENT       ** (%%)~/~/  Set up the CLIENT of MQTT
351 +* (% style="color:blue" %)**AT+UNAME=UNAME                                **(%%)~/~/  Set the username of MQTT
352 +* (% style="color:blue" %)**AT+PWD=PWD                                         **(%%)~/~/  Set the password of MQTT
353 +* (% style="color:blue" %)**AT+PUBTOPIC=f9527                               **(%%)~/~/  Set the sending topic of MQTT
354 +* (% style="color:blue" %)**AT+SUBTOPIC=Ns9527          **(%%) ~/~/  Set the subscription topic of MQTT
371 371  
372 372  [[image:1657352634421-276.png]]
373 373  
... ... @@ -385,7 +385,6 @@
385 385  )))
386 386  
387 387  
388 -
389 389  === 2.2.8  Use TCP protocol to uplink data ===
390 390  
391 391  
... ... @@ -400,7 +400,6 @@
400 400  [[image:1657352914475-252.png]]
401 401  
402 402  
403 -
404 404  === 2.2.9  Change Update Interval ===
405 405  
406 406  
... ... @@ -421,7 +421,6 @@
421 421  )))
422 422  
423 423  
424 -
425 425  == 2.3  Uplink Payload ==
426 426  
427 427  
... ... @@ -464,13 +464,11 @@
464 464  **By default, the device will send an uplink message every 1 hour.**
465 465  
466 466  
467 -
468 468  
469 469  )))
470 470  
471 471  === 2.3.1  Payload Analyze ===
472 472  
473 -
474 474  ==== 2.3.1.1  Before Firmware v1.2 ====
475 475  
476 476  
... ... @@ -477,10 +477,8 @@
477 477  N95S31B uplink payload includes in total 21 bytes
478 478  
479 479  
480 -(% border="2" cellspacing="10" style="background-color:#ffffcc; color:green; width:745px" %)
481 -|=(% style="width: 60px;" %)(((
482 -**Size(bytes)**
483 -)))|=(% style="width: 65px;" %)**6**|=(% style="width: 50px;" %)2|=(% style="width: 25px;" %)**2**|=(% style="width: 75px;" %)**1**|=(% style="width: 59px;" %)1|=(% style="width: 162px;" %)5|=(% style="width: 102px;" %)**2**|=(% style="width: 81px;" %)**2**
459 +(% border="1" style="background-color:#ffffcc; color:green; width:520px" %)
460 +|=(% style="width: 50px;" %)**Size(bytes)**|=(% style="width: 45px;" %)**6**|=(% style="width: 25px;" %)2|=(% style="width: 25px;" %)**2**|=(% style="width: 65px;" %)**1**|=(% style="width: 50px;" %)1|=(% style="width: 120px;" %)5|=(% style="width: 70px;" %)**2**|=(% style="width: 70px;" %)**2**
484 484  |(% style="width:97px" %)**Value**|(% style="width:65px" %)[[Device ID>>||anchor="H2.3.2A0DeviceID"]]|(% style="width:50px" %)[[Ver>>||anchor="H2.3.3A0VersionInfo"]]|(% style="width:46px" %)[[BAT>>||anchor="H2.3.4A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.3.5A0SignalStrength"]]|(% style="width:59px" %)MOD 0X01|(% style="width:162px" %)(((
485 485  (((
486 486  Reserve/ Same as NBSN95 CFGMOD=1
... ... @@ -519,7 +519,7 @@
519 519  [[image:1657354294009-643.png]]
520 520  
521 521  
522 -The payload is ASCII string, representative same HEX: **0x724031607457 006e 0ccd 1b 01 00dc000ccc 00e1 0186**
499 +The payload is ASCII string, representative same HEX: (% style="background-color:yellow" %)**0x724031607457 006e 0ccd 1b 01 00dc000ccc 00e1 0186**
523 523  
524 524  **where:**
525 525  
... ... @@ -542,7 +542,6 @@
542 542  (((
543 543  
544 544  
545 -
546 546  
547 547  )))
548 548  
... ... @@ -554,9 +554,9 @@
554 554  Each time the device uploads a data package, 8 sets of recorded data will be attached. Up to 32 sets of recorded data can be uploaded.
555 555  
556 556  
557 -(% border="2" style="background-color:#ffffcc; color:green; width:1234px" %)
558 -|(% style="width:95px" %)**Size(bytes)**|(% style="width:82px" %)**8**|(% style="width:43px" %)**2**|(% style="width:47px" %)**2**|(% style="width:124px" %)**1**|(% style="width:56px" %)**1**|(% style="width:109px" %)**2**|(% style="width:80px" %)**1**|(% style="width:51px" %)**2**|(% style="width:79px" %)**2**|(% style="width:84px" %)**2**|(% style="width:100px" %)**4**|(% style="width:76px" %)**2**|(% style="width:81px" %)**2**|(% style="width:121px" %)**4**
559 -|(% style="width:95px" %)**Value**|(% style="width:82px" %)Device ID|(% style="width:43px" %)Ver|(% style="width:47px" %)BAT|(% style="width:124px" %)Signal Strength|(% style="width:56px" %)MOD|(% style="width:109px" %)TemDS18B20|(% style="width:80px" %)Interrupt|(% style="width:51px" %)ADC|(% style="width:79px" %)SHTTEM|(% style="width:84px" %)SHTHUM|(% style="width:100px" %)Time stamp |(% style="width:76px" %)SHTTEM|(% style="width:81px" %)SHTHUM|(% style="width:121px" %)Time stamp .....
533 +(% border="1" style="background-color:#ffffcc; color:green; width:520px" %)
534 +|=(% scope="row" style="width: 50px;" %)**Size(bytes)**|(% style="width:40px" %)**8**|(% style="width:20px" %)**2**|(% style="width:20px" %)**2**|(% style="width:30px" %)**1**|(% style="width:20px" %)**1**|(% style="width:55px" %)**2**|(% style="width:35px" %)**1**|(% style="width:20px" %)**2**|(% style="width:40px" %)**2**|(% style="width:40px" %)**2**|(% style="width:30px" %)**4**|(% style="width:40px" %)**2**|(% style="width:40px" %)**2**|(% style="width:35px" %)**4**
535 +|=(% style="width: 95px;" %)**Value**|(% style="width:82px" %)Device ID|(% style="width:43px" %)Ver|(% style="width:47px" %)BAT|(% style="width:124px" %)Signal Strength|(% style="width:56px" %)MOD|(% style="width:109px" %)TemDS18B20|(% style="width:80px" %)Interrupt|(% style="width:51px" %)ADC|(% style="width:79px" %)SHTTEM|(% style="width:84px" %)SHTHUM|(% style="width:100px" %)Time stamp |(% style="width:76px" %)SHTTEM|(% style="width:81px" %)SHTHUM|(% style="width:121px" %)Time stamp .....
560 560  
561 561  If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the N95S31B uplink data.
562 562  
... ... @@ -566,8 +566,10 @@
566 566  
567 567  The payload is ASCII string, representative same HEX:
568 568  
569 -**0x (% style="color:red" %)__f868411056758782__ (% style="color:blue" %)__000c__ (% style="color:green" %)__0d0f__ (% style="color:#00b0f0" %)__0c__ (% style="color:#7030a0" %)__01__ (% style="color:#d60093" %)__0000__ (% style="color:#a14d07" %)__00__ __0030__ (% style="color:#0020b0" %)__0114__ (% style="color:#420042" %)__0231__ (% style="color:#663300" %)__63199d3c__ (%%)__0113023163199d12__ __0113023163199c5e__// //__0112023763199baa__ __0112023263199af6__// //__0111023b631999a7__ __0112023b631998f3__// //__011202426319983f__ __01110242631996eb__**
545 +**0x (% style="color:red" %)__f868411056758782__ (% style="color:blue" %)__000c__ (% style="color:green" %)__0d0f__ (% style="color:#00b0f0" %)__0c__ (% style="color:#7030a0" %)__01__ (% style="color:#d60093" %)__0000__ (% style="color:#a14d07" %)__00__ __0030__ (% style="color:#0020b0" %)__0114__ (% style="color:#420042" %)__0231__ (% style="color:#663300" %)__63199d3c__ (%%)__0113023163199d12__ __0113023163199c5e__// //__0112023763199baa__ __0112023263199af6__// //__0111023b631999a7__ **
570 570  
547 +**__0112023b631998f3__// //__011202426319983f__ __01110242631996eb__**
548 +
571 571  **where:**
572 572  
573 573  * (% style="color:#037691" %)**Device ID:**(%%) f868411056758782 = f868411056758782
... ... @@ -574,7 +574,7 @@
574 574  
575 575  * (% style="color:#037691" %)**Version:** (%%)0x000c=120=1.2
576 576  
577 -* (% style="color:#037691" %)**BAT:**  (%%)0x0d0f = 3343 mV = 3.343V
555 +* (% style="color:#037691" %)**BAT:**      (%%)0x0d0f = 3343 mV = 3.343V
578 578  
579 579  * (% style="color:#037691" %)**Singal:**(%%)  0x0c = 12
580 580  
... ... @@ -597,8 +597,6 @@
597 597  * (% style="color:#037691" %)**8 sets of recorded data:**(%%)** **SHTTEM,SHTHUM,Time stamp : 0113023163199c5e, .......
598 598  
599 599  
600 -
601 -
602 602  === 2.3.2  Device ID ===
603 603  
604 604  
... ... @@ -639,7 +639,6 @@
639 639  AT+DEUI=868411056754138
640 640  
641 641  
642 -
643 643  === 2.3.3  Version Info ===
644 644  
645 645  
... ... @@ -667,7 +667,6 @@
667 667  
668 668  )))
669 669  
670 -
671 671  === 2.3.4  Battery Info ===
672 672  
673 673  
... ... @@ -680,7 +680,6 @@
680 680  )))
681 681  
682 682  
683 -
684 684  === 2.3.5  Signal Strength ===
685 685  
686 686  
... ... @@ -713,7 +713,6 @@
713 713  )))
714 714  
715 715  
716 -
717 717  === 2.3.6  Temperature & Humidity ===
718 718  
719 719  
... ... @@ -732,7 +732,6 @@
732 732  Humidity:    Read:0295(H)=661(D)    Value:  661 / 10=66.1, So 66.1%
733 733  
734 734  
735 -
736 736  == 2.4  Downlink Payload ==
737 737  
738 738  
... ... @@ -785,7 +785,6 @@
785 785  )))
786 786  
787 787  
788 -
789 789  == 2.5  Humidity and Temperature alarm function ==
790 790  
791 791  
... ... @@ -821,7 +821,6 @@
821 821  AT+ SHTEMP=20,30 ~/~/ Alarm when temperature lower than 20.
822 822  
823 823  
824 -
825 825  == 2.6 Set the number of data to be uploaded and the recording time ==
826 826  
827 827  
... ... @@ -835,7 +835,6 @@
835 835  [[image:image-20221009001045-1.png||height="726" width="1009"]]
836 836  
837 837  
838 -
839 839  == 2.7 Read or Clear cached data ==
840 840  
841 841  
... ... @@ -847,70 +847,14 @@
847 847  [[image:image-20220908163102-2.png]]
848 848  
849 849  
818 +== 2.8 Battery & Power Consumption ==
850 850  
851 -== 2.8  ​Battery Analysis ==
852 852  
821 +N95S31B uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
853 853  
854 -=== 2.8.1  ​Battery Type ===
823 +[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
855 855  
856 856  
857 -(((
858 -The N95S31B battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-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.
859 -)))
860 -
861 -(((
862 -The battery is designed to last for several years depends on the actually use environment and update interval. 
863 -)))
864 -
865 -(((
866 -The battery related documents as below:
867 -)))
868 -
869 -* [[Battery Dimension>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
870 -* [[Lithium-Thionyl Chloride Battery datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
871 -* [[Lithium-ion Battery-Capacitor datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
872 -
873 -(((
874 -[[image:image-20220709101450-2.png]]
875 -)))
876 -
877 -
878 -
879 -=== 2.8.2  Power consumption Analyze ===
880 -
881 -
882 -(((
883 -The file **DRAGINO_N95S31B-Power-Analyzer.pdf** from [[https:~~/~~/www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i~~-~~-AyZcQkoua?dl=0>>https://www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i--AyZcQkoua?dl=0]] describes a detail measurement to analyze the power consumption in different case. User can use it for design guideline for their project.
884 -)))
885 -
886 -(((
887 -
888 -)))
889 -
890 -
891 -=== 2.8.3  ​Battery Note ===
892 -
893 -
894 -(((
895 -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 uplink data, then the battery life may be decreased.
896 -)))
897 -
898 -
899 -
900 -=== 2.8.4  Replace the battery ===
901 -
902 -
903 -(((
904 -You can change the battery in the N95S31B.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.
905 -)))
906 -
907 -
908 -(((
909 -The default battery pack of N95S31B 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).
910 -)))
911 -
912 -
913 -
914 914  = 3. ​ Access NB-IoT Module =
915 915  
916 916  
... ... @@ -927,10 +927,8 @@
927 927  [[image:1657333200519-600.png]]
928 928  
929 929  
930 -
931 931  = 4.  Using the AT Commands =
932 932  
933 -
934 934  == 4.1  Access AT Commands ==
935 935  
936 936  
... ... @@ -1024,10 +1024,8 @@
1024 1024  AT+PWORD  : Serial Access Password
1025 1025  
1026 1026  
1027 -
1028 1028  = ​5.  FAQ =
1029 1029  
1030 -
1031 1031  == 5.1 ​ How to Upgrade Firmware ==
1032 1032  
1033 1033  
... ... @@ -1040,7 +1040,7 @@
1040 1040  )))
1041 1041  
1042 1042  (((
1043 -
951 +firmware：[[Dropbox - Firmware - 简化您的生活>>url:https://www.dropbox.com/sh/ap9k142hfnlh5w6/AACJeN_St0ryUl3AggrNB5x0a/N95S31B/Firmware?dl=0&subfolder_nav_tracking=1]]
1044 1044  
1045 1045  (((
1046 1046  (% style="color:red" %)**Notice, N95S31B and LSN50v2 share the same mother board. They use the same connection and method to update.**
... ... @@ -1048,10 +1048,8 @@
1048 1048  )))
1049 1049  
1050 1050  
1051 -
1052 1052  = 6.  Trouble Shooting =
1053 1053  
1054 -
1055 1055  == 6.1  ​Connection problem when uploading firmware ==
1056 1056  
1057 1057  
... ... @@ -1064,7 +1064,6 @@
1064 1064  
1065 1065  )))
1066 1066  
1067 -
1068 1068  == 6.2  AT Command input doesn't work ==
1069 1069  
1070 1070  
... ... @@ -1074,7 +1074,6 @@
1074 1074  
1075 1075  )))
1076 1076  
1077 -
1078 1078  = 7. ​ Order Info =
1079 1079  
1080 1080  
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1081 1081  Part Number**:** (% style="color:#4f81bd" %)**N95S31B-YY**
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1083 1083  
1084 -(% class="wikigeneratedid" %)
1085 -(((
1086 -
1087 -)))
1088 -
1089 1089  = 8.  Packing Info =
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1091 1091  (((
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1111 1111  (((
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1113 1113  
1114 -
1115 1115  
1116 1116  )))
1117 1117  
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1120 1120  
1121 1121  * 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.
1122 1122  * 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]]
1021 +
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