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]] ... ... @@ -326,31 +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 -(% style="color:red" %)**NOTE 1: By default, the device will send an uplink message every 1 hour.** 314 +(% style="color:red" %)**NOTE:** 315 +))) 336 336 337 - 317 +((( 318 +(% style="color:red" %)1. By default, the device will send an uplink message every 1 hour. 338 338 ))) 339 339 340 -(% style="color:red" %)**NOTE 2: When the firmware version is v1.3.2 and later firmware:** 341 341 342 -(% 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).** 343 343 344 - 345 - 346 346 == 2.3 Uplink Payload == 347 347 348 - 349 -=== 2.3.1 Before Firmware 1.3.2 === 350 - 351 - 352 352 In this mode, uplink payload includes in total 14 bytes 353 353 327 + 354 354 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:440px" %) 355 355 |=(% style="width: 60px;" %)((( 356 356 **Size(bytes)** ... ... @@ -364,9 +364,8 @@ 364 364 365 365 [[image:1657331036973-987.png]] 366 366 367 - 368 368 ((( 369 -The payload is **ASCII**string, representative same HEX:342 +The payload is ASCII string, representative same HEX: 370 370 ))) 371 371 372 372 ((( ... ... @@ -377,11 +377,11 @@ 377 377 Device ID: 0x724031556159 = 724031556159 378 378 ))) 379 379 * ((( 380 -Version: 353 +Version: 0x0064=100=1.0.0 381 381 ))) 382 382 383 383 * ((( 384 -BAT: 357 +BAT: 0x0c6c = 3180 mV = 3.180V 385 385 ))) 386 386 * ((( 387 387 Signal: 0x19 = 25 ... ... @@ -394,51 +394,14 @@ 394 394 395 395 396 396 397 - 398 398 399 399 ))) 400 400 401 -=== **2.3.2 Since firmware v1.3.2** === 402 - 403 - 404 -In this mode, uplink payload includes 69 bytes in total by default. 405 - 406 -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. 407 - 408 -(% border="2" style="background-color:#ffffcc; color:green; width:896px" %) 409 -|(% 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" %)4 410 -|(% 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....... 411 - 412 -If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NDDS75 uplink data. 413 - 414 -[[image:image-20220908175246-1.png]] 415 - 416 - 417 -The payload is ASCII string, representative same HEX: 418 - 419 -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: 420 - 421 -* (% style="color:green" %)Device ID: f867787050213317 = f867787050213317 422 -* (% style="color:red" %)Version: 0x0084=132=1.3.2 423 -* (% style="color:green" %)BAT: 0x0cf4 = 3316 mV = 3.316V 424 -* (% style="color:blue" %)Singal: 0x1e = 30 425 -* (% style="color:red" %)Mod: 0x01 = 1 426 -* Interrupt: 0x00= 0 427 -* Distance: 0x0039= 57 = 57 428 -* Time stamp : 0x6315537b =1662342011 ([[Unix Epoch Time>>url:http://www.epochconverter.com/]]) 429 -* Distance,Time stamp : 00396319baf0 430 -* (% style="color:red" %) 8 sets of recorded data: Distance,Time stamp : //**00396319ba3c**//,....... 431 - 432 - 433 - 434 - 435 - 436 436 == 2.4 Payload Explanation and Sensor Interface == 437 437 438 438 439 439 === 2.4.1 Device ID === 440 440 441 - 442 442 ((( 443 443 By default, the Device ID equal to the last 6 bytes of IMEI. 444 444 ))) ... ... @@ -445,12 +445,10 @@ 445 445 446 446 ((( 447 447 User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 448 - 449 - 450 450 ))) 451 451 452 452 ((( 453 - (% style="color:blue" %)**Example387 +**Example:** 454 454 ))) 455 455 456 456 ((( ... ... @@ -458,26 +458,13 @@ 458 458 ))) 459 459 460 460 ((( 461 -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. 462 462 ))) 463 463 464 464 465 -(% style="color:red" %)**NOTE: When the firmware version is v1.3.2 and later firmware:** 466 466 467 -(% style="color:red" %)**By default, the Device ID equal to the last 15 bits of IMEI.** 468 - 469 -User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 470 - 471 - 472 -(% style="color:blue" %)**Example :** 473 - 474 -AT+DEUI=868411056754138 475 - 476 - 477 - 478 478 === 2.4.2 Version Info === 479 479 480 - 481 481 ((( 482 482 Specify the software version: 0x64=100, means firmware version 1.00. 483 483 ))) ... ... @@ -490,7 +490,6 @@ 490 490 491 491 === 2.4.3 Battery Info === 492 492 493 - 494 494 ((( 495 495 Ex1: 0x0B45 = 2885mV 496 496 ))) ... ... @@ -503,7 +503,6 @@ 503 503 504 504 === 2.4.4 Signal Strength === 505 505 506 - 507 507 ((( 508 508 NB-IoT Network signal Strength. 509 509 ))) ... ... @@ -536,7 +536,6 @@ 536 536 537 537 === 2.4.5 Distance === 538 538 539 - 540 540 Get the distance. Flat object range 280mm - 7500mm. 541 541 542 542 ((( ... ... @@ -559,7 +559,6 @@ 559 559 560 560 === 2.4.6 Digital Interrupt === 561 561 562 - 563 563 ((( 564 564 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. 565 565 ))) ... ... @@ -594,7 +594,6 @@ 594 594 595 595 === 2.4.7 +5V Output === 596 596 597 - 598 598 ((( 599 599 NDDS75 will enable +5V output before all sampling and disable the +5v after all sampling. 600 600 ))) ... ... @@ -602,14 +602,10 @@ 602 602 603 603 ((( 604 604 The 5V output time can be controlled by AT Command. 605 - 606 - 607 607 ))) 608 608 609 609 ((( 610 610 (% style="color:blue" %)**AT+5VT=1000** 611 - 612 - 613 613 ))) 614 614 615 615 ((( ... ... @@ -620,7 +620,6 @@ 620 620 621 621 == 2.5 Downlink Payload == 622 622 623 - 624 624 By default, NDDS75 prints the downlink payload to console port. 625 625 626 626 [[image:image-20220709100028-1.png]] ... ... @@ -671,55 +671,9 @@ 671 671 672 672 673 673 674 -== 2.6 D istancealarm function(Since firmwarev1.3.2)==585 +== 2.6 LED Indicator == 675 675 676 676 677 -(% style="color:blue" %)** ➢ AT Command:** 678 - 679 -(% style="color:#037691" %)** AT+ LDDSALARM=min,max** 680 - 681 -² When min=0, and max≠0, Alarm higher than max 682 - 683 -² When min≠0, and max=0, Alarm lower than min 684 - 685 -² When min≠0 and max≠0, Alarm higher than max or lower than min 686 - 687 - 688 -(% style="color:blue" %)** Example:** 689 - 690 -**AT+ LDDSALARM=260,2000** ~/~/ Alarm when distance lower than 260. 691 - 692 - 693 - 694 -== 2.7 Set the number of data to be uploaded and the recording time == 695 - 696 - 697 -(% style="color:blue" %)** ➢ AT Command:** 698 - 699 -(% 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) 700 - 701 -(% 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. 702 - 703 - 704 - 705 -== 2.8 Read or Clear cached data == 706 - 707 - 708 -(% style="color:blue" %)** ➢ AT Command:** 709 - 710 -(% style="color:#037691" %)** AT+CDP ** (%%) ~/~/ Read cached data 711 - 712 - 713 -[[image:image-20220908175333-2.png]] 714 - 715 - 716 -(% style="color:#037691" %)** AT+CDP=0** (%%) ~/~/ Clear cached data 717 - 718 - 719 - 720 -== 2.9 LED Indicator == 721 - 722 - 723 723 The NDDS75 has an internal LED which is to show the status of different state. 724 724 725 725 ... ... @@ -734,29 +734,29 @@ 734 734 735 735 736 736 737 -== 2. 10Firmware Change Log ==602 +== 2.7 Firmware Change Log == 738 738 739 739 740 740 ((( 741 -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 742 742 ))) 743 743 744 744 ((( 745 - 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/]] 746 746 ))) 747 747 613 + 748 748 ((( 749 -Upgrade Instruction: [[Upgrade 615 +Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]] 750 750 ))) 751 751 752 752 753 753 754 -== 2. 11Battery Analysis ==620 +== 2.8 Battery Analysis == 755 755 622 +=== 2.8.1 Battery Type === 756 756 757 -=== 2.11.1 Battery Type === 758 758 759 - 760 760 ((( 761 761 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. 762 762 ))) ... ... @@ -779,9 +779,8 @@ 779 779 780 780 781 781 782 -=== 2. 11.2 Power consumption Analyze ===647 +=== 2.8.2 Power consumption Analyze === 783 783 784 - 785 785 ((( 786 786 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. 787 787 ))) ... ... @@ -818,9 +818,8 @@ 818 818 819 819 820 820 821 -=== 2. 11.3 Battery Note ===685 +=== 2.8.3 Battery Note === 822 822 823 - 824 824 ((( 825 825 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. 826 826 ))) ... ... @@ -827,9 +827,8 @@ 827 827 828 828 829 829 830 -=== 2. 11.4 Replace the battery ===693 +=== 2.8.4 Replace the battery === 831 831 832 - 833 833 ((( 834 834 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). 835 835 ))) ... ... @@ -838,7 +838,6 @@ 838 838 839 839 = 3. Access NB-IoT Module = 840 840 841 - 842 842 ((( 843 843 Users can directly access the AT command set of the NB-IoT module. 844 844 ))) ... ... @@ -845,8 +845,6 @@ 845 845 846 846 ((( 847 847 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/]] 848 - 849 - 850 850 ))) 851 851 852 852 [[image:1657333200519-600.png]] ... ... @@ -855,13 +855,11 @@ 855 855 856 856 = 4. Using the AT Commands = 857 857 858 - 859 859 == 4.1 Access AT Commands == 860 860 719 +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/]] 861 861 862 -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]] 863 863 864 - 865 865 AT+<CMD>? : Help on <CMD> 866 866 867 867 AT+<CMD> : Run <CMD> ... ... @@ -901,23 +901,7 @@ 901 901 902 902 AT+SERVADDR : Server Address 903 903 904 -AT+TR : Get or Set record time" 905 905 906 -AT+APN : Get or set the APN 907 - 908 -AT+FBAND : Get or Set whether to automatically modify the frequency band 909 - 910 -AT+DNSCFG : Get or Set DNS Server 911 - 912 -AT+GETSENSORVALUE : Returns the current sensor measurement 913 - 914 -AT+NOUD : Get or Set the number of data to be uploaded 915 - 916 -AT+CDP : Read or Clear cached data 917 - 918 -AT+LDDSALARM : Get or Set alarm of distance 919 - 920 - 921 921 (% style="color:#037691" %)**COAP Management** 922 922 923 923 AT+URI : Resource parameters ... ... @@ -951,7 +951,6 @@ 951 951 952 952 = 5. FAQ = 953 953 954 - 955 955 == 5.1 How to Upgrade Firmware == 956 956 957 957 ... ... @@ -964,7 +964,7 @@ 964 964 ))) 965 965 966 966 ((( 967 -(% 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. 968 968 ))) 969 969 970 970 ... ... @@ -971,7 +971,6 @@ 971 971 972 972 = 6. Trouble Shooting = 973 973 974 - 975 975 == 6.1 Connection problem when uploading firmware == 976 976 977 977 ... ... @@ -987,7 +987,6 @@ 987 987 988 988 == 6.2 AT Command input doesn't work == 989 989 990 - 991 991 ((( 992 992 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. 993 993 ... ... @@ -1020,7 +1020,6 @@ 1020 1020 ((( 1021 1021 1022 1022 1023 - 1024 1024 (% style="color:#037691" %)**Dimension and weight**: 1025 1025 1026 1026 * Device Size: 13.0 x 5 x 4.5 cm ... ... @@ -1038,6 +1038,5 @@ 1038 1038 1039 1039 = 9. Support = 1040 1040 1041 - 1042 1042 * 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. 1043 1043 * 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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