Changes for page N95S31B -- NB-IoT Temperature & Humidity Sensor User Manual
Last modified by Mengting Qiu on 2024/04/02 16:44
<
edited by Mengting Qiu
on 2024/04/02 16:44
on 2024/04/02 16:44
Change comment:
There is no comment for this version
Summary
-
Page properties (3 modified, 0 added, 0 removed)
Details
- Page properties
-
- Title
-
... ... @@ -1,1 +1,1 @@ 1 -N95S31B NB-IoT Temperature & Humidity Sensor User Manual 1 +N95S31B -- NB-IoT Temperature & Humidity Sensor User Manual - Author
-
... ... @@ -1,1 +1,1 @@ 1 -XWiki. Xiaoling1 +XWiki.ting - Content
-
... ... @@ -17,11 +17,8 @@ 17 17 18 18 = 1. Introduction = 19 19 20 - 21 21 == 1.1 What is N95S31B NB-IoT Sensor Node == 22 22 23 -((( 24 - 25 25 26 26 ((( 27 27 The Dragino N95S31B is a (% style="color:blue" %)**NB-IoT Temperature and Humidity Sensor**(%%) for Internet of Things solution. It is used to measure the (% style="color:blue" %)**surrounding environment temperature and relative air humidity precisely**(%%), and then upload to IoT server via NB-IoT network*. ... ... @@ -40,20 +40,13 @@ 40 40 ))) 41 41 42 42 ((( 43 - 44 -))) 45 - 46 -((( 47 47 ~* make sure you have NB-IoT coverage locally. 48 48 ))) 49 49 50 - 51 -))) 52 52 53 53 [[image:1657348284168-431.png]] 54 54 55 55 56 - 57 57 == 1.2 Features == 58 58 59 59 ... ... @@ -78,12 +78,12 @@ 78 78 79 79 (% style="color:#037691" %)**NB-IoT Spec:** 80 80 81 -* -B1 @H-FDD: 2100MHz82 -* -B3 @H-FDD: 1800MHz83 -* -B8 @H-FDD: 900MHz84 -* -B5 @H-FDD: 850MHz85 -* -B20 @H-FDD: 800MHz86 -* -B28 @H-FDD: 700MHz71 +* B1 @H-FDD: 2100MHz 72 +* B3 @H-FDD: 1800MHz 73 +* B8 @H-FDD: 900MHz 74 +* B5 @H-FDD: 850MHz 75 +* B20 @H-FDD: 800MHz 76 +* B28 @H-FDD: 700MHz 87 87 88 88 (% style="color:#037691" %)**Battery:** 89 89 ... ... @@ -107,7 +107,6 @@ 107 107 108 108 109 109 110 - 111 111 == 1.5 Pin Definitions & Switch == 112 112 113 113 ... ... @@ -117,7 +117,6 @@ 117 117 [[image:image-20220709144723-1.png]] 118 118 119 119 120 - 121 121 === 1.5.1 Jumper JP2 === 122 122 123 123 ... ... @@ -124,7 +124,6 @@ 124 124 Power on Device when put this jumper. 125 125 126 126 127 - 128 128 === 1.5.2 BOOT MODE / SW1 === 129 129 130 130 ... ... @@ -137,7 +137,6 @@ 137 137 ))) 138 138 139 139 140 - 141 141 === 1.5.3 Reset Button === 142 142 143 143 ... ... @@ -144,7 +144,6 @@ 144 144 Press to reboot the device. 145 145 146 146 147 - 148 148 === 1.5.4 LED === 149 149 150 150 ... ... @@ -155,10 +155,8 @@ 155 155 2. Send an uplink packet 156 156 157 157 158 - 159 159 = 2. Use N95S31B to communicate with IoT Server = 160 160 161 - 162 162 == 2.1 How it works == 163 163 164 164 ... ... @@ -181,10 +181,8 @@ 181 181 182 182 ))) 183 183 184 - 185 185 == 2.2 Configure the N95S31B == 186 186 187 - 188 188 === 2.2.1 Power On N95S31B === 189 189 190 190 ... ... @@ -191,10 +191,9 @@ 191 191 [[image:image-20220709150546-2.png]] 192 192 193 193 175 +=== 2.2.2 Test Requirement === 194 194 195 -=== 2.2.1 Test Requirement === 196 196 197 - 198 198 ((( 199 199 To use N95S31B in your city, make sure meet below requirements: 200 200 ))) ... ... @@ -241,7 +241,6 @@ 241 241 [[image:1657350625843-586.png]] 242 242 243 243 244 - 245 245 === 2.2.3 Insert SIM card === 246 246 247 247 ... ... @@ -257,7 +257,6 @@ 257 257 [[image:1657351240556-536.png]] 258 258 259 259 260 - 261 261 === 2.2.4 Connect USB – TTL to N95S31B to configure it === 262 262 263 263 ... ... @@ -301,7 +301,6 @@ 301 301 ))) 302 302 303 303 304 - 305 305 === 2.2.5 Use CoAP protocol to uplink data === 306 306 307 307 ... ... @@ -338,13 +338,11 @@ 338 338 [[image:1657352185396-303.png]] 339 339 340 340 341 - 342 342 === 2.2.6 Use UDP protocol to uplink data(Default protocol) === 343 343 344 344 345 345 * (% style="color:blue" %)**AT+PRO=2 ** (%%) ~/~/ Set to use UDP protocol to uplink 346 346 * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5601 ** (%%) ~/~/ to set UDP server address and port 347 -* (% style="color:blue" %)**AT+CFM=1 ** (%%) ~/~/ If the server does not respond, this command is unnecessary 348 348 349 349 [[image:1657352391268-297.png]] 350 350 ... ... @@ -352,7 +352,6 @@ 352 352 [[image:1657352403317-397.png]] 353 353 354 354 355 - 356 356 === 2.2.7 Use MQTT protocol to uplink data === 357 357 358 358 ... ... @@ -376,13 +376,11 @@ 376 376 To save battery life, N95S31B will establish a subscription before each uplink and close the subscription 3 seconds after uplink successful. Any downlink commands from server will only arrive during the subscription period. 377 377 ))) 378 378 379 - 380 380 ((( 381 381 MQTT protocol has a much high-power consumption compare vs UDP / CoAP protocol. Please check the power analyze document and adjust the uplink period to a suitable interval. 382 382 ))) 383 383 384 384 385 - 386 386 === 2.2.8 Use TCP protocol to uplink data === 387 387 388 388 ... ... @@ -397,7 +397,6 @@ 397 397 [[image:1657352914475-252.png]] 398 398 399 399 400 - 401 401 === 2.2.9 Change Update Interval === 402 402 403 403 ... ... @@ -418,7 +418,6 @@ 418 418 ))) 419 419 420 420 421 - 422 422 == 2.3 Uplink Payload == 423 423 424 424 ... ... @@ -432,7 +432,7 @@ 432 432 ))) 433 433 434 434 ((( 435 - (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/will set the N95S31B to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor. 405 + (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/ will set the N95S31B to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor. 436 436 ))) 437 437 438 438 ... ... @@ -461,24 +461,19 @@ 461 461 **By default, the device will send an uplink message every 1 hour.** 462 462 463 463 464 - 465 465 466 466 ))) 467 467 468 468 === 2.3.1 Payload Analyze === 469 469 470 - 471 471 ==== 2.3.1.1 Before Firmware v1.2 ==== 472 472 473 473 474 -N95S31B uplink payload includes in total 21 bytes 442 +N95S31B uplink payload includes in total 21 bytes. 475 475 476 - 477 -(% border="1.5" cellspacing="0" style="background-color:#ffffcc; color:green; width:520px" %) 478 -|=(% scope="row" style="width: 50px;" %)((( 479 -**Size(bytes)** 480 -)))|=(% style="width: 40px;" %)**6**|=(% style="width: 20px;" %)2|=(% style="width: 20px;" %)**2**|=(% style="width: 60px;" %)**1**|=(% style="width: 50px;" %)1|=(% style="width: 100px;" %)5|=(% style="width: 102px;" %)**2**|=(% style="width: 81px;" %)**2** 481 -|=(% 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" %)((( 444 +(% border="1" style="background-color:#f2f2f2; width:520px" %) 445 +|=(% style="width: 50px;background-color:#D9E2F3" %)**Size(bytes)**|=(% style="width: 45px;background-color:#D9E2F3" %)**6**|=(% style="width: 25px;background-color:#D9E2F3" %)2|=(% style="width: 25px;background-color:#D9E2F3" %)**2**|=(% style="width: 65px;background-color:#D9E2F3" %)**1**|=(% style="width: 50px;background-color:#D9E2F3" %)1|=(% style="width: 120px;background-color:#D9E2F3" %)5|=(% style="width: 70px;background-color:#D9E2F3" %)**2**|=(% style="width: 70px;background-color:#D9E2F3" %)**2** 446 +|(% 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" %)((( 482 482 ((( 483 483 Reserve/ Same as NBSN95 CFGMOD=1 484 484 ))) ... ... @@ -539,7 +539,6 @@ 539 539 ((( 540 540 541 541 542 - 543 543 544 544 ))) 545 545 ... ... @@ -550,11 +550,10 @@ 550 550 551 551 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. 552 552 517 +(% border="1" style="background-color:#f2f2f2; width:520px" %) 518 +|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**8**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:30px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:55px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:35px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:30px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**4** 519 +|(% 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 ..... 553 553 554 -(% border="1" style="background-color:#ffffcc; color:green; width:520px" %) 555 -|=(% scope="row" style="width: 50px;" %)**Size(bytes)**|(% style="width:40px" %)**8**|(% style="width:25px" %)**2**|(% style="width:25px" %)**2**|(% style="width:60px" %)**1**|(% style="width:25px" %)**1**|(% style="width:50px" %)**2**|(% style="width:50px" %)**1**|(% style="width:30px" %)**2**|(% style="width:50px" %)**2**|(% style="width:50px" %)**2**|(% style="width:50px" %)**4**|(% style="width:40px" %)**2**|(% style="width:40px" %)**2**|(% style="width:50px" %)**4** 556 -|=(% 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 ..... 557 - 558 558 If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the N95S31B uplink data. 559 559 560 560 ... ... @@ -635,7 +635,6 @@ 635 635 AT+DEUI=868411056754138 636 636 637 637 638 - 639 639 === 2.3.3 Version Info === 640 640 641 641 ... ... @@ -644,11 +644,11 @@ 644 644 ))) 645 645 646 646 ((( 647 -Higher byte: Specify hardware version: always 0x00 for N95S31B 609 +**Higher byte:** Specify hardware version: always 0x00 for N95S31B 648 648 ))) 649 649 650 650 ((( 651 -Lower byte: Specify the software version: 0x6E=110, means firmware version 110 613 +**Lower byte:** Specify the software version: 0x6E=110, means firmware version 110 652 652 ))) 653 653 654 654 ((( ... ... @@ -663,7 +663,6 @@ 663 663 664 664 ))) 665 665 666 - 667 667 === 2.3.4 Battery Info === 668 668 669 669 ... ... @@ -676,7 +676,6 @@ 676 676 ))) 677 677 678 678 679 - 680 680 === 2.3.5 Signal Strength === 681 681 682 682 ... ... @@ -709,7 +709,6 @@ 709 709 ))) 710 710 711 711 712 - 713 713 === 2.3.6 Temperature & Humidity === 714 714 715 715 ... ... @@ -728,15 +728,17 @@ 728 728 Humidity: Read:0295(H)=661(D) Value: 661 / 10=66.1, So 66.1% 729 729 730 730 731 - 732 732 == 2.4 Downlink Payload == 733 733 734 734 735 735 By default, N95S31B prints the downlink payload to console port. 736 736 737 -[[image:image-20220709100028-1.png]] 695 +(% border="1" style="background-color:#f2f2f2; width:520px" %) 696 +|(% style="background-color:#d9e2f3; color:#0070c0; width:200px" %)**Downlink Control Type**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**FPort**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**Type Code**|(% style="background-color:#d9e2f3; color:#0070c0; width:170px" %)**Downlink payload size(bytes)** 697 +|(% style="width:204px" %)TDC(Transmit Time Interval)|(% style="width:80px" %)Any|(% style="width:94px" %)01|(% style="width:150px" %)4 698 +|(% style="width:204px" %)RESET|(% style="width:80px" %)Any|(% style="width:94px" %)04|(% style="width:150px" %)2 699 +|(% style="width:204px" %)INTMOD|(% style="width:80px" %)Any|(% style="width:94px" %)06|(% style="width:150px" %)4 738 738 739 - 740 740 ((( 741 741 (% style="color:blue" %)**Examples:** 742 742 ))) ... ... @@ -781,7 +781,6 @@ 781 781 ))) 782 782 783 783 784 - 785 785 == 2.5 Humidity and Temperature alarm function == 786 786 787 787 ... ... @@ -817,7 +817,6 @@ 817 817 AT+ SHTEMP=20,30 ~/~/ Alarm when temperature lower than 20. 818 818 819 819 820 - 821 821 == 2.6 Set the number of data to be uploaded and the recording time == 822 822 823 823 ... ... @@ -831,7 +831,6 @@ 831 831 [[image:image-20221009001045-1.png||height="726" width="1009"]] 832 832 833 833 834 - 835 835 == 2.7 Read or Clear cached data == 836 836 837 837 ... ... @@ -843,70 +843,14 @@ 843 843 [[image:image-20220908163102-2.png]] 844 844 845 845 804 +== 2.8 Battery & Power Consumption == 846 846 847 -== 2.8 Battery Analysis == 848 848 807 +N95S31B uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace. 849 849 850 - === 2.8.1 BatteryType===809 +[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] . 851 851 852 852 853 -((( 854 -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. 855 -))) 856 - 857 -((( 858 -The battery is designed to last for several years depends on the actually use environment and update interval. 859 -))) 860 - 861 -((( 862 -The battery related documents as below: 863 -))) 864 - 865 -* [[Battery Dimension>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]] 866 -* [[Lithium-Thionyl Chloride Battery datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]] 867 -* [[Lithium-ion Battery-Capacitor datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]] 868 - 869 -((( 870 -[[image:image-20220709101450-2.png]] 871 -))) 872 - 873 - 874 - 875 -=== 2.8.2 Power consumption Analyze === 876 - 877 - 878 -((( 879 -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. 880 -))) 881 - 882 -((( 883 - 884 -))) 885 - 886 - 887 -=== 2.8.3 Battery Note === 888 - 889 - 890 -((( 891 -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. 892 -))) 893 - 894 - 895 - 896 -=== 2.8.4 Replace the battery === 897 - 898 - 899 -((( 900 -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. 901 -))) 902 - 903 - 904 -((( 905 -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). 906 -))) 907 - 908 - 909 - 910 910 = 3. Access NB-IoT Module = 911 911 912 912 ... ... @@ -923,10 +923,8 @@ 923 923 [[image:1657333200519-600.png]] 924 924 925 925 926 - 927 927 = 4. Using the AT Commands = 928 928 929 - 930 930 == 4.1 Access AT Commands == 931 931 932 932 ... ... @@ -995,11 +995,6 @@ 995 995 AT+URI : Resource parameters 996 996 997 997 998 -(% style="color:#037691" %)**UDP Management** 999 - 1000 -AT+CFM : Upload confirmation mode (only valid for UDP) 1001 - 1002 - 1003 1003 (% style="color:#037691" %)**MQTT Management** 1004 1004 1005 1005 AT+CLIENT : Get or Set MQTT client ... ... @@ -1020,10 +1020,8 @@ 1020 1020 AT+PWORD : Serial Access Password 1021 1021 1022 1022 1023 - 1024 1024 = 5. FAQ = 1025 1025 1026 - 1027 1027 == 5.1 How to Upgrade Firmware == 1028 1028 1029 1029 ... ... @@ -1036,18 +1036,14 @@ 1036 1036 ))) 1037 1037 1038 1038 ((( 1039 - 932 +Firmware Download:[[https:~~/~~/www.dropbox.com/sh/fr8w23rb951512i/AACSJeGQg-7ZjKhAI_Sn57H6a?dl=0>>https://www.dropbox.com/sh/fr8w23rb951512i/AACSJeGQg-7ZjKhAI_Sn57H6a?dl=0]] 1040 1040 1041 -((( 1042 1042 (% style="color:red" %)**Notice, N95S31B and LSN50v2 share the same mother board. They use the same connection and method to update.** 1043 1043 ))) 1044 -))) 1045 1045 1046 1046 1047 - 1048 1048 = 6. Trouble Shooting = 1049 1049 1050 - 1051 1051 == 6.1 Connection problem when uploading firmware == 1052 1052 1053 1053 ... ... @@ -1055,12 +1055,7 @@ 1055 1055 **Please see: **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting]] 1056 1056 ))) 1057 1057 1058 -(% class="wikigeneratedid" %) 1059 -((( 1060 - 1061 -))) 1062 1062 1063 - 1064 1064 == 6.2 AT Command input doesn't work == 1065 1065 1066 1066 ... ... @@ -1070,7 +1070,12 @@ 1070 1070 1071 1071 ))) 1072 1072 957 +== 6.3 Not able to connect to NB-IoT network and keep showing "Signal Strength:99". == 1073 1073 959 + 960 +This means sensor is trying to join the NB-IoT network but fail. Please see this link for **//[[trouble shooting for signal strenght:99>>doc:Main.CSQ\:99,99.WebHome]]//**. 961 + 962 + 1074 1074 = 7. Order Info = 1075 1075 1076 1076 ... ... @@ -1077,11 +1077,6 @@ 1077 1077 Part Number**:** (% style="color:#4f81bd" %)**N95S31B-YY** 1078 1078 1079 1079 1080 -(% class="wikigeneratedid" %) 1081 -((( 1082 - 1083 -))) 1084 - 1085 1085 = 8. Packing Info = 1086 1086 1087 1087 ((( ... ... @@ -1104,15 +1104,11 @@ 1104 1104 * Weight / pcs : 180g 1105 1105 ))) 1106 1106 1107 -((( 1108 - 1109 1109 1110 1110 1111 - 1112 -))) 1113 - 1114 1114 = 9. Support = 1115 1115 1116 1116 1117 1117 * 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. 997 + 1118 1118 * 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]]