Changes for page NDDS75 -- NB-IoT Distance Detect Sensor User Manual
Last modified by Bei Jinggeng on 2024/05/31 09:53
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... ... @@ -16,7 +16,6 @@ 16 16 17 17 = 1. Introduction = 18 18 19 - 20 20 == 1.1 What is NDDS75 Distance Detection Sensor == 21 21 22 22 ((( ... ... @@ -57,7 +57,6 @@ 57 57 58 58 == 1.2 Features == 59 59 60 - 61 61 * NB-IoT Bands: B1/B3/B8/B5/B20/B28 @H-FDD 62 62 * Ultra low power consumption 63 63 * Distance Detection by Ultrasonic technology ... ... @@ -71,9 +71,9 @@ 71 71 * Micro SIM card slot for NB-IoT SIM 72 72 * 8500mAh Battery for long term use 73 73 72 + 74 74 == 1.3 Specification == 75 75 76 - 77 77 (% style="color:#037691" %)**Common DC Characteristics:** 78 78 79 79 * Supply Voltage: 2.1v ~~ 3.6v ... ... @@ -101,9 +101,9 @@ 101 101 * STOP Mode: 10uA @ 3.3v 102 102 * Max transmit power: 350mA@3.3v 103 103 102 + 104 104 == 1.4 Applications == 105 105 106 - 107 107 * Smart Buildings & Home Automation 108 108 * Logistics and Supply Chain Management 109 109 * Smart Metering ... ... @@ -115,8 +115,6 @@ 115 115 116 116 117 117 118 - 119 - 120 120 == 1.5 Pin Definitions == 121 121 122 122 ... ... @@ -126,10 +126,8 @@ 126 126 127 127 = 2. Use NDDS75 to communicate with IoT Server = 128 128 129 - 130 130 == 2.1 How it works == 131 131 132 - 133 133 ((( 134 134 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. 135 135 ))) ... ... @@ -155,7 +155,6 @@ 155 155 156 156 === 2.2.1 Test Requirement === 157 157 158 - 159 159 ((( 160 160 To use NDDS75 in your city, make sure meet below requirements: 161 161 ))) ... ... @@ -165,7 +165,7 @@ 165 165 * Your operator is able to distribute the data received in their NB-IoT network to your IoT server. 166 166 167 167 ((( 168 -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 .161 +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 169 169 ))) 170 170 171 171 ... ... @@ -175,7 +175,6 @@ 175 175 176 176 === 2.2.2 Insert SIM card === 177 177 178 - 179 179 ((( 180 180 Insert the NB-IoT Card get from your provider. 181 181 ))) ... ... @@ -191,7 +191,6 @@ 191 191 192 192 === 2.2.3 Connect USB – TTL to NDDS75 to configure it === 193 193 194 - 195 195 ((( 196 196 ((( 197 197 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. ... ... @@ -200,7 +200,6 @@ 200 200 201 201 [[image:image-20220709092052-2.png]] 202 202 203 - 204 204 **Connection:** 205 205 206 206 (% style="background-color:yellow" %)USB TTL GND <~-~-~-~-> GND ... ... @@ -224,9 +224,8 @@ 224 224 225 225 [[image:1657329814315-101.png]] 226 226 227 - 228 228 ((( 229 -(% 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]]**218 +(% 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/]] 230 230 ))) 231 231 232 232 ... ... @@ -233,10 +233,9 @@ 233 233 234 234 === 2.2.4 Use CoAP protocol to uplink data === 235 235 225 +(% 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/]] 236 236 237 -(% 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/]]** 238 238 239 - 240 240 ((( 241 241 **Use below commands:** 242 242 ))) ... ... @@ -249,25 +249,17 @@ 249 249 ))) 250 250 * ((( 251 251 (% style="color:blue" %)**AT+URI=5,11,"mqtt",11,"coap",12,"0",15,"c=text1",23,"0" ** (%%) ~/~/Set COAP resource path 252 - 253 - 254 - 255 255 ))) 256 256 257 257 ((( 258 258 For parameter description, please refer to AT command set 259 - 260 - 261 261 ))) 262 262 263 263 [[image:1657330452568-615.png]] 264 264 265 265 266 - 267 267 ((( 268 268 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. 269 - 270 - 271 271 ))) 272 272 273 273 [[image:1657330472797-498.png]] ... ... @@ -326,34 +326,25 @@ 326 326 327 327 === 2.2.8 Change Update Interval === 328 328 329 - 330 330 User can use below command to change the (% style="color:green" %)**uplink interval**. 331 331 332 332 * (% style="color:blue" %)**AT+TDC=600 ** (%%)~/~/ Set Update Interval to 600s 333 333 334 334 ((( 335 - 336 - 337 - 338 338 (% style="color:red" %)**NOTE:** 315 +))) 339 339 340 -(% style="color:red" %)**1: By default, the device will send an uplink message every 1 hour.** 341 - 342 -(% style="color:red" %)**2: When the firmware version is v1.3.2 and later firmware:** 317 +((( 318 +(% style="color:red" %)1. By default, the device will send an uplink message every 1 hour. 343 343 ))) 344 344 345 -(% style="color:red" %)**By default, the device will send an uplink message every 2 hours. Each Uplink Include 8 set of records in this 2 hour (15 minute interval / record).** 346 346 347 347 348 - 349 349 == 2.3 Uplink Payload == 350 350 351 - 352 -=== 2.3.1 Before Firmware 1.3.2 === 353 - 354 - 355 355 In this mode, uplink payload includes in total 14 bytes 356 356 327 + 357 357 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:440px" %) 358 358 |=(% style="width: 60px;" %)((( 359 359 **Size(bytes)** ... ... @@ -367,9 +367,8 @@ 367 367 368 368 [[image:1657331036973-987.png]] 369 369 370 - 371 371 ((( 372 -The payload is **ASCII**string, representative same HEX:342 +The payload is ASCII string, representative same HEX: 373 373 ))) 374 374 375 375 ((( ... ... @@ -380,11 +380,11 @@ 380 380 Device ID: 0x724031556159 = 724031556159 381 381 ))) 382 382 * ((( 383 -Version: 353 +Version: 0x0064=100=1.0.0 384 384 ))) 385 385 386 386 * ((( 387 -BAT: 357 +BAT: 0x0c6c = 3180 mV = 3.180V 388 388 ))) 389 389 * ((( 390 390 Signal: 0x19 = 25 ... ... @@ -397,51 +397,14 @@ 397 397 398 398 399 399 400 - 401 401 402 402 ))) 403 403 404 -=== **2.3.2 Since firmware v1.3.2** === 405 - 406 - 407 -In this mode, uplink payload includes 69 bytes in total by default. 408 - 409 -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. 410 - 411 -(% border="2" style="background-color:#ffffcc; color:green; width:896px" %) 412 -|(% style="width:95px" %)**Size(bytes)**|(% style="width:84px" %)**8**|(% style="width:44px" %)2|(% style="width:48px" %)2|(% style="width:123px" %)1|(% style="width:55px" %)1|(% style="width:80px" %)1|(% style="width:77px" %)2|(% style="width:94px" %)4|(% style="width:77px" %)2|(% style="width:116px" %)4 413 -|(% style="width:95px" %)**Value**|(% style="width:84px" %)Device ID|(% style="width:44px" %)Ver|(% style="width:48px" %)BAT|(% style="width:123px" %)Signal Strength|(% style="width:55px" %)MOD|(% style="width:80px" %)Interrupt|(% style="width:77px" %)Distance|(% style="width:94px" %)Timestamp|(% style="width:77px" %)Distance|(% style="width:116px" %)Timestamp....... 414 - 415 -If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NDDS75 uplink data. 416 - 417 -[[image:image-20220908175246-1.png]] 418 - 419 - 420 -The payload is ASCII string, representative same HEX: 421 - 422 -0x(% style="color:red" %)f867787050213317(% style="color:blue" %)0084(% style="color:green" %)0cf4(% style="color:red" %)1e(% style="color:blue" %)01(% style="color:green" %)00(% style="color:red" %)**//00396319bb32//**00396319baf0//**00396319ba3c**//00396319b988//**00396319b8d4**//00396319b820//**00396319b76c**//00396319b6b8//**00396319b604**//(%%) where: 423 - 424 -* (% style="color:green" %)Device ID: f867787050213317 = f867787050213317 425 -* (% style="color:red" %)Version: 0x0084=132=1.3.2 426 -* (% style="color:green" %)BAT: 0x0cf4 = 3316 mV = 3.316V 427 -* (% style="color:blue" %)Singal: 0x1e = 30 428 -* (% style="color:red" %)Mod: 0x01 = 1 429 -* Interrupt: 0x00= 0 430 -* Distance: 0x0039= 57 = 57 431 -* Time stamp : 0x6315537b =1662342011 ([[Unix Epoch Time>>url:http://www.epochconverter.com/]]) 432 -* Distance,Time stamp : 00396319baf0 433 -* (% style="color:red" %) 8 sets of recorded data: Distance,Time stamp : //**00396319ba3c**//,....... 434 - 435 - 436 - 437 - 438 - 439 439 == 2.4 Payload Explanation and Sensor Interface == 440 440 441 441 442 442 === 2.4.1 Device ID === 443 443 444 - 445 445 ((( 446 446 By default, the Device ID equal to the last 6 bytes of IMEI. 447 447 ))) ... ... @@ -448,12 +448,10 @@ 448 448 449 449 ((( 450 450 User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 451 - 452 - 453 453 ))) 454 454 455 455 ((( 456 - (% style="color:blue" %)**Example387 +**Example:** 457 457 ))) 458 458 459 459 ((( ... ... @@ -461,26 +461,13 @@ 461 461 ))) 462 462 463 463 ((( 464 -The Device ID is stored in a none-erase area, Upgrade the firmware or run (% style="color:blue" %)**AT+FDR**(%%)won't erase Device ID.395 +The Device ID is stored in a none-erase area, Upgrade the firmware or run **AT+FDR** won't erase Device ID. 465 465 ))) 466 466 467 467 468 -(% style="color:red" %)**NOTE: When the firmware version is v1.3.2 and later firmware:** 469 469 470 -(% style="color:red" %)**By default, the Device ID equal to the last 15 bits of IMEI.** 471 - 472 -User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 473 - 474 - 475 -(% style="color:blue" %)**Example :** 476 - 477 -AT+DEUI=868411056754138 478 - 479 - 480 - 481 481 === 2.4.2 Version Info === 482 482 483 - 484 484 ((( 485 485 Specify the software version: 0x64=100, means firmware version 1.00. 486 486 ))) ... ... @@ -493,7 +493,6 @@ 493 493 494 494 === 2.4.3 Battery Info === 495 495 496 - 497 497 ((( 498 498 Ex1: 0x0B45 = 2885mV 499 499 ))) ... ... @@ -506,7 +506,6 @@ 506 506 507 507 === 2.4.4 Signal Strength === 508 508 509 - 510 510 ((( 511 511 NB-IoT Network signal Strength. 512 512 ))) ... ... @@ -539,7 +539,6 @@ 539 539 540 540 === 2.4.5 Distance === 541 541 542 - 543 543 Get the distance. Flat object range 280mm - 7500mm. 544 544 545 545 ((( ... ... @@ -562,7 +562,6 @@ 562 562 563 563 === 2.4.6 Digital Interrupt === 564 564 565 - 566 566 ((( 567 567 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. 568 568 ))) ... ... @@ -597,7 +597,6 @@ 597 597 598 598 === 2.4.7 +5V Output === 599 599 600 - 601 601 ((( 602 602 NDDS75 will enable +5V output before all sampling and disable the +5v after all sampling. 603 603 ))) ... ... @@ -605,14 +605,10 @@ 605 605 606 606 ((( 607 607 The 5V output time can be controlled by AT Command. 608 - 609 - 610 610 ))) 611 611 612 612 ((( 613 613 (% style="color:blue" %)**AT+5VT=1000** 614 - 615 - 616 616 ))) 617 617 618 618 ((( ... ... @@ -623,7 +623,6 @@ 623 623 624 624 == 2.5 Downlink Payload == 625 625 626 - 627 627 By default, NDDS75 prints the downlink payload to console port. 628 628 629 629 [[image:image-20220709100028-1.png]] ... ... @@ -674,55 +674,9 @@ 674 674 675 675 676 676 677 -== 2.6 D istancealarm function(Since firmwarev1.3.2)==585 +== 2.6 LED Indicator == 678 678 679 679 680 -(% style="color:blue" %)** ➢ AT Command:** 681 - 682 -(% style="color:#037691" %)** AT+ LDDSALARM=min,max** 683 - 684 -² When min=0, and max≠0, Alarm higher than max 685 - 686 -² When min≠0, and max=0, Alarm lower than min 687 - 688 -² When min≠0 and max≠0, Alarm higher than max or lower than min 689 - 690 - 691 -(% style="color:blue" %)** Example:** 692 - 693 -**AT+ LDDSALARM=260,2000** ~/~/ Alarm when distance lower than 260. 694 - 695 - 696 - 697 -== 2.7 Set the number of data to be uploaded and the recording time == 698 - 699 - 700 -(% style="color:blue" %)** ➢ AT Command:** 701 - 702 -(% style="color:#037691" %)** AT+TR=900** (%%) ~/~/ The unit is seconds, and the default is to record data once every 900 seconds.( The minimum can be set to 180 seconds) 703 - 704 -(% style="color:#037691" %)** AT+NOUD=8** (%%) ~/~/ The device uploads 8 sets of recorded data by default. Up to 32 sets of record data can be uploaded. 705 - 706 - 707 - 708 -== 2.8 Read or Clear cached data == 709 - 710 - 711 -(% style="color:blue" %)** ➢ AT Command:** 712 - 713 -(% style="color:#037691" %)** AT+CDP ** (%%) ~/~/ Read cached data 714 - 715 - 716 -[[image:image-20220908175333-2.png]] 717 - 718 - 719 -(% style="color:#037691" %)** AT+CDP=0** (%%) ~/~/ Clear cached data 720 - 721 - 722 - 723 -== 2.9 LED Indicator == 724 - 725 - 726 726 The NDDS75 has an internal LED which is to show the status of different state. 727 727 728 728 ... ... @@ -737,29 +737,29 @@ 737 737 738 738 739 739 740 -== 2. 10Firmware Change Log ==602 +== 2.7 Firmware Change Log == 741 741 742 742 743 743 ((( 744 -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]]606 +Download URL & Firmware Change log 745 745 ))) 746 746 747 747 ((( 748 - 610 +[[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/]] 749 749 ))) 750 750 613 + 751 751 ((( 752 -Upgrade Instruction: [[Upgrade 615 +Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]] 753 753 ))) 754 754 755 755 756 756 757 -== 2. 11Battery Analysis ==620 +== 2.8 Battery Analysis == 758 758 622 +=== 2.8.1 Battery Type === 759 759 760 -=== 2.11.1 Battery Type === 761 761 762 - 763 763 ((( 764 764 The NDDS75 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. 765 765 ))) ... ... @@ -782,9 +782,8 @@ 782 782 783 783 784 784 785 -=== 2. 11.2 Power consumption Analyze ===647 +=== 2.8.2 Power consumption Analyze === 786 786 787 - 788 788 ((( 789 789 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. 790 790 ))) ... ... @@ -821,9 +821,8 @@ 821 821 822 822 823 823 824 -=== 2. 11.3 Battery Note ===685 +=== 2.8.3 Battery Note === 825 825 826 - 827 827 ((( 828 828 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. 829 829 ))) ... ... @@ -830,9 +830,8 @@ 830 830 831 831 832 832 833 -=== 2. 11.4 Replace the battery ===693 +=== 2.8.4 Replace the battery === 834 834 835 - 836 836 ((( 837 837 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). 838 838 ))) ... ... @@ -841,7 +841,6 @@ 841 841 842 842 = 3. Access NB-IoT Module = 843 843 844 - 845 845 ((( 846 846 Users can directly access the AT command set of the NB-IoT module. 847 847 ))) ... ... @@ -848,8 +848,6 @@ 848 848 849 849 ((( 850 850 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/]] 851 - 852 - 853 853 ))) 854 854 855 855 [[image:1657333200519-600.png]] ... ... @@ -858,13 +858,11 @@ 858 858 859 859 = 4. Using the AT Commands = 860 860 861 - 862 862 == 4.1 Access AT Commands == 863 863 719 +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/]] 864 864 865 -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]] 866 866 867 - 868 868 AT+<CMD>? : Help on <CMD> 869 869 870 870 AT+<CMD> : Run <CMD> ... ... @@ -904,23 +904,7 @@ 904 904 905 905 AT+SERVADDR : Server Address 906 906 907 -AT+TR : Get or Set record time" 908 908 909 -AT+APN : Get or set the APN 910 - 911 -AT+FBAND : Get or Set whether to automatically modify the frequency band 912 - 913 -AT+DNSCFG : Get or Set DNS Server 914 - 915 -AT+GETSENSORVALUE : Returns the current sensor measurement 916 - 917 -AT+NOUD : Get or Set the number of data to be uploaded 918 - 919 -AT+CDP : Read or Clear cached data 920 - 921 -AT+LDDSALARM : Get or Set alarm of distance 922 - 923 - 924 924 (% style="color:#037691" %)**COAP Management** 925 925 926 926 AT+URI : Resource parameters ... ... @@ -954,7 +954,6 @@ 954 954 955 955 = 5. FAQ = 956 956 957 - 958 958 == 5.1 How to Upgrade Firmware == 959 959 960 960 ... ... @@ -967,7 +967,7 @@ 967 967 ))) 968 968 969 969 ((( 970 -(% style="color:red" %) **Notice, NDDS75 and LDDS75 share the same mother board. They use the same connection and method to update.**807 +(% style="color:red" %)Notice, NDDS75 and LDDS75 share the same mother board. They use the same connection and method to update. 971 971 ))) 972 972 973 973 ... ... @@ -974,7 +974,6 @@ 974 974 975 975 = 6. Trouble Shooting = 976 976 977 - 978 978 == 6.1 Connection problem when uploading firmware == 979 979 980 980 ... ... @@ -990,7 +990,6 @@ 990 990 991 991 == 6.2 AT Command input doesn't work == 992 992 993 - 994 994 ((( 995 995 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. 996 996 ... ... @@ -1023,7 +1023,6 @@ 1023 1023 ((( 1024 1024 1025 1025 1026 - 1027 1027 (% style="color:#037691" %)**Dimension and weight**: 1028 1028 1029 1029 * Device Size: 13.0 x 5 x 4.5 cm ... ... @@ -1041,6 +1041,5 @@ 1041 1041 1042 1042 = 9. Support = 1043 1043 1044 - 1045 1045 * 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. 1046 1046 * 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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