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 ... ... @@ -72,12 +72,8 @@ 72 72 * 8500mAh Battery for long term use 73 73 74 74 75 - 76 - 77 - 78 78 == 1.3 Specification == 79 79 80 - 81 81 (% style="color:#037691" %)**Common DC Characteristics:** 82 82 83 83 * Supply Voltage: 2.1v ~~ 3.6v ... ... @@ -106,12 +106,8 @@ 106 106 * Max transmit power: 350mA@3.3v 107 107 108 108 109 - 110 - 111 - 112 112 == 1.4 Applications == 113 113 114 - 115 115 * Smart Buildings & Home Automation 116 116 * Logistics and Supply Chain Management 117 117 * Smart Metering ... ... @@ -123,8 +123,6 @@ 123 123 124 124 125 125 126 - 127 - 128 128 == 1.5 Pin Definitions == 129 129 130 130 ... ... @@ -134,10 +134,8 @@ 134 134 135 135 = 2. Use NDDS75 to communicate with IoT Server = 136 136 137 - 138 138 == 2.1 How it works == 139 139 140 - 141 141 ((( 142 142 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. 143 143 ))) ... ... @@ -163,7 +163,6 @@ 163 163 164 164 === 2.2.1 Test Requirement === 165 165 166 - 167 167 ((( 168 168 To use NDDS75 in your city, make sure meet below requirements: 169 169 ))) ... ... @@ -173,7 +173,7 @@ 173 173 * Your operator is able to distribute the data received in their NB-IoT network to your IoT server. 174 174 175 175 ((( 176 -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 177 177 ))) 178 178 179 179 ... ... @@ -183,7 +183,6 @@ 183 183 184 184 === 2.2.2 Insert SIM card === 185 185 186 - 187 187 ((( 188 188 Insert the NB-IoT Card get from your provider. 189 189 ))) ... ... @@ -199,7 +199,6 @@ 199 199 200 200 === 2.2.3 Connect USB – TTL to NDDS75 to configure it === 201 201 202 - 203 203 ((( 204 204 ((( 205 205 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. ... ... @@ -208,7 +208,6 @@ 208 208 209 209 [[image:image-20220709092052-2.png]] 210 210 211 - 212 212 **Connection:** 213 213 214 214 (% style="background-color:yellow" %)USB TTL GND <~-~-~-~-> GND ... ... @@ -232,9 +232,8 @@ 232 232 233 233 [[image:1657329814315-101.png]] 234 234 235 - 236 236 ((( 237 -(% 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/]] 238 238 ))) 239 239 240 240 ... ... @@ -241,10 +241,9 @@ 241 241 242 242 === 2.2.4 Use CoAP protocol to uplink data === 243 243 225 +(% 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/]] 244 244 245 -(% 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/]]** 246 246 247 - 248 248 ((( 249 249 **Use below commands:** 250 250 ))) ... ... @@ -257,25 +257,17 @@ 257 257 ))) 258 258 * ((( 259 259 (% style="color:blue" %)**AT+URI=5,11,"mqtt",11,"coap",12,"0",15,"c=text1",23,"0" ** (%%) ~/~/Set COAP resource path 260 - 261 - 262 - 263 263 ))) 264 264 265 265 ((( 266 266 For parameter description, please refer to AT command set 267 - 268 - 269 269 ))) 270 270 271 271 [[image:1657330452568-615.png]] 272 272 273 273 274 - 275 275 ((( 276 276 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. 277 - 278 - 279 279 ))) 280 280 281 281 [[image:1657330472797-498.png]] ... ... @@ -334,34 +334,25 @@ 334 334 335 335 === 2.2.8 Change Update Interval === 336 336 337 - 338 338 User can use below command to change the (% style="color:green" %)**uplink interval**. 339 339 340 340 * (% style="color:blue" %)**AT+TDC=600 ** (%%)~/~/ Set Update Interval to 600s 341 341 342 342 ((( 343 - 344 - 345 - 346 346 (% style="color:red" %)**NOTE:** 315 +))) 347 347 348 -(% style="color:red" %)**1. By default, the device will send an uplink message every 1 hour.** 349 - 350 -(% 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. 351 351 ))) 352 352 353 -(% 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).** 354 354 355 355 356 - 357 357 == 2.3 Uplink Payload == 358 358 359 - 360 -=== 2.3.1 Before Firmware 1.3.2 === 361 - 362 - 363 363 In this mode, uplink payload includes in total 14 bytes 364 364 327 + 365 365 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:440px" %) 366 366 |=(% style="width: 60px;" %)((( 367 367 **Size(bytes)** ... ... @@ -375,9 +375,8 @@ 375 375 376 376 [[image:1657331036973-987.png]] 377 377 378 - 379 379 ((( 380 -The payload is **ASCII**string, representative same HEX:342 +The payload is ASCII string, representative same HEX: 381 381 ))) 382 382 383 383 ((( ... ... @@ -388,11 +388,11 @@ 388 388 Device ID: 0x724031556159 = 724031556159 389 389 ))) 390 390 * ((( 391 -Version: 353 +Version: 0x0064=100=1.0.0 392 392 ))) 393 393 394 394 * ((( 395 -BAT: 357 +BAT: 0x0c6c = 3180 mV = 3.180V 396 396 ))) 397 397 * ((( 398 398 Signal: 0x19 = 25 ... ... @@ -405,51 +405,14 @@ 405 405 406 406 407 407 408 - 409 409 410 410 ))) 411 411 412 -=== **2.3.2 Since firmware v1.3.2** === 413 - 414 - 415 -In this mode, uplink payload includes 69 bytes in total by default. 416 - 417 -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. 418 - 419 -(% border="2" style="background-color:#ffffcc; color:green; width:896px" %) 420 -|(% 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" %)4 421 -|(% 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....... 422 - 423 -If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NDDS75 uplink data. 424 - 425 -[[image:image-20220908175246-1.png]] 426 - 427 - 428 -The payload is ASCII string, representative same HEX: 429 - 430 -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: 431 - 432 -* (% style="color:green" %)Device ID: f867787050213317 = f867787050213317 433 -* (% style="color:red" %)Version: 0x0084=132=1.3.2 434 -* (% style="color:green" %)BAT: 0x0cf4 = 3316 mV = 3.316V 435 -* (% style="color:blue" %)Singal: 0x1e = 30 436 -* (% style="color:red" %)Mod: 0x01 = 1 437 -* Interrupt: 0x00= 0 438 -* Distance: 0x0039= 57 = 57 439 -* Time stamp : 0x6315537b =1662342011 ([[Unix Epoch Time>>url:http://www.epochconverter.com/]]) 440 -* Distance,Time stamp : 00396319baf0 441 -* (% style="color:red" %) 8 sets of recorded data: Distance,Time stamp : //**00396319ba3c**//,....... 442 - 443 - 444 - 445 - 446 - 447 447 == 2.4 Payload Explanation and Sensor Interface == 448 448 449 449 450 450 === 2.4.1 Device ID === 451 451 452 - 453 453 ((( 454 454 By default, the Device ID equal to the last 6 bytes of IMEI. 455 455 ))) ... ... @@ -456,12 +456,10 @@ 456 456 457 457 ((( 458 458 User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 459 - 460 - 461 461 ))) 462 462 463 463 ((( 464 - (% style="color:blue" %)**Example387 +**Example:** 465 465 ))) 466 466 467 467 ((( ... ... @@ -469,26 +469,13 @@ 469 469 ))) 470 470 471 471 ((( 472 -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. 473 473 ))) 474 474 475 475 476 -(% style="color:red" %)**NOTE: When the firmware version is v1.3.2 and later firmware:** 477 477 478 -(% style="color:red" %)**By default, the Device ID equal to the last 15 bits of IMEI.** 479 - 480 -User can use (% style="color:blue" %)**AT+DEUI**(%%) to set Device ID 481 - 482 - 483 -(% style="color:blue" %)**Example :** 484 - 485 -AT+DEUI=868411056754138 486 - 487 - 488 - 489 489 === 2.4.2 Version Info === 490 490 491 - 492 492 ((( 493 493 Specify the software version: 0x64=100, means firmware version 1.00. 494 494 ))) ... ... @@ -501,7 +501,6 @@ 501 501 502 502 === 2.4.3 Battery Info === 503 503 504 - 505 505 ((( 506 506 Ex1: 0x0B45 = 2885mV 507 507 ))) ... ... @@ -514,7 +514,6 @@ 514 514 515 515 === 2.4.4 Signal Strength === 516 516 517 - 518 518 ((( 519 519 NB-IoT Network signal Strength. 520 520 ))) ... ... @@ -547,7 +547,6 @@ 547 547 548 548 === 2.4.5 Distance === 549 549 550 - 551 551 Get the distance. Flat object range 280mm - 7500mm. 552 552 553 553 ((( ... ... @@ -570,7 +570,6 @@ 570 570 571 571 === 2.4.6 Digital Interrupt === 572 572 573 - 574 574 ((( 575 575 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. 576 576 ))) ... ... @@ -605,7 +605,6 @@ 605 605 606 606 === 2.4.7 +5V Output === 607 607 608 - 609 609 ((( 610 610 NDDS75 will enable +5V output before all sampling and disable the +5v after all sampling. 611 611 ))) ... ... @@ -613,14 +613,10 @@ 613 613 614 614 ((( 615 615 The 5V output time can be controlled by AT Command. 616 - 617 - 618 618 ))) 619 619 620 620 ((( 621 621 (% style="color:blue" %)**AT+5VT=1000** 622 - 623 - 624 624 ))) 625 625 626 626 ((( ... ... @@ -631,7 +631,6 @@ 631 631 632 632 == 2.5 Downlink Payload == 633 633 634 - 635 635 By default, NDDS75 prints the downlink payload to console port. 636 636 637 637 [[image:image-20220709100028-1.png]] ... ... @@ -682,54 +682,9 @@ 682 682 683 683 684 684 685 -== 2.6 D istancealarm function(Since firmwarev1.3.2)==585 +== 2.6 LED Indicator == 686 686 687 687 688 -(% style="color:blue" %)** ➢ AT Command:** 689 - 690 -(% style="color:#037691" %)** AT+ LDDSALARM=min,max** 691 - 692 -² When min=0, and max≠0, Alarm higher than max 693 - 694 -² When min≠0, and max=0, Alarm lower than min 695 - 696 -² When min≠0 and max≠0, Alarm higher than max or lower than min 697 - 698 - 699 -(% style="color:blue" %)** Example:** 700 - 701 -**AT+ LDDSALARM=260,2000** ~/~/ Alarm when distance lower than 260. 702 - 703 - 704 - 705 -== 2.7 Set the number of data to be uploaded and the recording time == 706 - 707 - 708 -(% style="color:blue" %)** ➢ AT Command:** 709 - 710 -* (% 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) 711 -* (% 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. 712 - 713 - 714 - 715 - 716 -== 2.8 Read or Clear cached data == 717 - 718 - 719 -(% style="color:blue" %)** ➢ AT Command:** 720 - 721 -* (% style="color:#037691" %)** AT+CDP ** (%%) ~/~/ Read cached data 722 -* (% style="color:#037691" %)** AT+CDP=0** (%%) ~/~/ Clear cached data 723 - 724 - 725 - 726 -[[image:image-20220908175333-2.png]] 727 - 728 - 729 - 730 -== 2.9 LED Indicator == 731 - 732 - 733 733 The NDDS75 has an internal LED which is to show the status of different state. 734 734 735 735 ... ... @@ -744,29 +744,29 @@ 744 744 745 745 746 746 747 -== 2. 10Firmware Change Log ==602 +== 2.7 Firmware Change Log == 748 748 749 749 750 750 ((( 751 -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 752 752 ))) 753 753 754 754 ((( 755 - 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/]] 756 756 ))) 757 757 613 + 758 758 ((( 759 -Upgrade Instruction: [[Upgrade 615 +Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]] 760 760 ))) 761 761 762 762 763 763 764 -== 2. 11Battery Analysis ==620 +== 2.8 Battery Analysis == 765 765 622 +=== 2.8.1 Battery Type === 766 766 767 -=== 2.11.1 Battery Type === 768 768 769 - 770 770 ((( 771 771 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. 772 772 ))) ... ... @@ -789,9 +789,8 @@ 789 789 790 790 791 791 792 -=== 2. 11.2 Power consumption Analyze ===647 +=== 2.8.2 Power consumption Analyze === 793 793 794 - 795 795 ((( 796 796 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. 797 797 ))) ... ... @@ -828,9 +828,8 @@ 828 828 829 829 830 830 831 -=== 2. 11.3 Battery Note ===685 +=== 2.8.3 Battery Note === 832 832 833 - 834 834 ((( 835 835 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. 836 836 ))) ... ... @@ -837,9 +837,8 @@ 837 837 838 838 839 839 840 -=== 2. 11.4 Replace the battery ===693 +=== 2.8.4 Replace the battery === 841 841 842 - 843 843 ((( 844 844 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). 845 845 ))) ... ... @@ -848,7 +848,6 @@ 848 848 849 849 = 3. Access NB-IoT Module = 850 850 851 - 852 852 ((( 853 853 Users can directly access the AT command set of the NB-IoT module. 854 854 ))) ... ... @@ -855,8 +855,6 @@ 855 855 856 856 ((( 857 857 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/]] 858 - 859 - 860 860 ))) 861 861 862 862 [[image:1657333200519-600.png]] ... ... @@ -865,13 +865,11 @@ 865 865 866 866 = 4. Using the AT Commands = 867 867 868 - 869 869 == 4.1 Access AT Commands == 870 870 719 +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/]] 871 871 872 -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]] 873 873 874 - 875 875 AT+<CMD>? : Help on <CMD> 876 876 877 877 AT+<CMD> : Run <CMD> ... ... @@ -911,23 +911,7 @@ 911 911 912 912 AT+SERVADDR : Server Address 913 913 914 -AT+TR : Get or Set record time" 915 915 916 -AT+APN : Get or set the APN 917 - 918 -AT+FBAND : Get or Set whether to automatically modify the frequency band 919 - 920 -AT+DNSCFG : Get or Set DNS Server 921 - 922 -AT+GETSENSORVALUE : Returns the current sensor measurement 923 - 924 -AT+NOUD : Get or Set the number of data to be uploaded 925 - 926 -AT+CDP : Read or Clear cached data 927 - 928 -AT+LDDSALARM : Get or Set alarm of distance 929 - 930 - 931 931 (% style="color:#037691" %)**COAP Management** 932 932 933 933 AT+URI : Resource parameters ... ... @@ -961,7 +961,6 @@ 961 961 962 962 = 5. FAQ = 963 963 964 - 965 965 == 5.1 How to Upgrade Firmware == 966 966 967 967 ... ... @@ -974,7 +974,7 @@ 974 974 ))) 975 975 976 976 ((( 977 -(% 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. 978 978 ))) 979 979 980 980 ... ... @@ -981,7 +981,6 @@ 981 981 982 982 = 6. Trouble Shooting = 983 983 984 - 985 985 == 6.1 Connection problem when uploading firmware == 986 986 987 987 ... ... @@ -997,7 +997,6 @@ 997 997 998 998 == 6.2 AT Command input doesn't work == 999 999 1000 - 1001 1001 ((( 1002 1002 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. 1003 1003 ... ... @@ -1030,7 +1030,6 @@ 1030 1030 ((( 1031 1031 1032 1032 1033 - 1034 1034 (% style="color:#037691" %)**Dimension and weight**: 1035 1035 1036 1036 * Device Size: 13.0 x 5 x 4.5 cm ... ... @@ -1048,6 +1048,5 @@ 1048 1048 1049 1049 = 9. Support = 1050 1050 1051 - 1052 1052 * 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. 1053 1053 * 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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