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... ... @@ -6,18 +6,12 @@
6 6  **RS485-LN – RS485 to LoRaWAN Converter User Manual**
7 7  
8 8  
9 -
10 -
11 11  **Table of Contents:**
12 12  
13 -{{toc/}}
14 14  
15 15  
16 16  
17 17  
18 -
19 -
20 -
21 21  = 1.Introduction =
22 22  
23 23  == 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
... ... @@ -80,9 +80,8 @@
80 80  * Preamble detection.
81 81  * 127 dB Dynamic Range RSSI.
82 82  * Automatic RF Sense and CAD with ultra-fast AFC.
83 -* Packet engine up to 256 bytes with CRC
77 +* Packet engine up to 256 bytes with CRC.
84 84  
85 -
86 86  == 1.3 Features ==
87 87  
88 88  * LoRaWAN Class A & Class C protocol (default Class C)
... ... @@ -94,7 +94,6 @@
94 94  * Support Modbus protocol
95 95  * Support Interrupt uplink (Since hardware version v1.2)
96 96  
97 -
98 98  == 1.4 Applications ==
99 99  
100 100  * Smart Buildings & Home Automation
... ... @@ -104,7 +104,6 @@
104 104  * Smart Cities
105 105  * Smart Factory
106 106  
107 -
108 108  == 1.5 Firmware Change log ==
109 109  
110 110  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
... ... @@ -168,7 +168,7 @@
168 168  [[image:1653268227651-549.png||height="592" width="720"]]
169 169  
170 170  (((
171 -The LG308 is already set to connect to [[TTN V3 network >>path:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
162 +The LG308 is already set to connect to [[TTN V3 network >>path:eu1.cloud.thethings.network/]]. So what we need to now is only configure the TTN V3:
172 172  )))
173 173  
174 174  (((
... ... @@ -220,7 +220,7 @@
220 220  
221 221  (((
222 222  (((
223 -There are plenty of RS485 devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-LN supports flexible command set. User can use [[AT Commands>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
214 +There are plenty of RS485 devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-LN supports flexible command set. User can use [[AT Commands>>path:#AT_COMMAND]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
224 224  )))
225 225  
226 226  (((
... ... @@ -292,8 +292,6 @@
292 292  )))
293 293  )))
294 294  
295 -
296 -
297 297  === 3.3.2 Configure sensors ===
298 298  
299 299  (((
... ... @@ -510,39 +510,46 @@
510 510  
511 511  * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-LN.  User can see these commands below:
512 512  
502 +
503 +
513 513  === 3.5.1 Common Commands ===
514 514  
515 515  They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
516 516  
517 517  
518 -=== 3.5.2 Sensor related commands ===
509 +=== 3.5.2 Sensor related commands: ===
519 519  
520 -Response feature is added to the server's downlink, a special package with a FPort of 200 will be uploaded immediately after receiving the data sent by the server.
511 +==== Choose Device Type (RS485 or TTL) ====
521 521  
522 -[[image:image-20220602163333-5.png||height="263" width="1160"]]
513 +RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
523 523  
524 -The first byte of this package represents whether the configuration is successful, 00 represents failure, 01 represents success. Except for the first byte, the other is the previous downlink. (All commands except A8 type commands are applicable)
515 +* AT Command
525 525  
517 +**AT+MOD=1** ~/~/ Set to support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
526 526  
527 -=== 3.5.3 Sensor related commands ===
519 +**AT+MOD=2** ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
528 528  
529 529  
522 +* Downlink Payload
530 530  
531 -==== **RS485 Debug Command** ====
524 +**0A aa**     à same as AT+MOD=aa
532 532  
533 -This command is used to configure the RS485 devices; they won’t be used during sampling.
534 534  
535 -* **AT Command**
536 536  
537 -(% class="box infomessage" %)
538 -(((
539 -**AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
540 -)))
528 +==== [[RS485 Debug Command>>path:#downlink_A8]] (AT+CFGDEV) ====
541 541  
542 -m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
530 +This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
543 543  
544 -* **Downlink Payload**
532 +* AT Command
545 545  
534 +AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
535 +
536 +m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
537 +
538 +
539 +
540 +* Downlink Payload
541 +
546 546  Format: A8 MM NN XX XX XX XX YY
547 547  
548 548  Where:
... ... @@ -550,12 +550,9 @@
550 550  * MM: 1: add CRC-16/MODBUS ; 0: no CRC
551 551  * NN: The length of RS485 command
552 552  * XX XX XX XX: RS485 command total NN bytes
553 -* YY: How many bytes will be uplink from the return of this RS485 command,
554 -** if YY=0, RS485-LN will execute the downlink command without uplink;
555 -** if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
556 -** if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
549 +* YY: How many bytes will be uplink from the return of this RS485 command, if YY=0, RS485-BL will execute the downlink command without uplink; if YY>0, RS485-BL will uplink total YY bytes from the output of this RS485 command
557 557  
558 -**Example 1** ~-~-> Configure without ask for uplink (YY=0)
551 +**Example 1:**
559 559  
560 560  To connect a Modbus Alarm with below commands.
561 561  
... ... @@ -565,190 +565,184 @@
565 565  
566 566  So if user want to use downlink command to control to RS485 Alarm, he can use:
567 567  
568 -(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
561 +**A8 01 06 0A 05 00 04 00 01 00**: to activate the RS485 Alarm
569 569  
570 -(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
563 +**A8 01 06 0A 05 00 04 00 00 00**: to deactivate the RS485 Alarm
571 571  
572 572  A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.
573 573  
574 574  
575 -**Example 2** ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
568 +**Example 2:**
576 576  
577 -User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
570 +Check TTL Sensor return:
578 578  
572 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
579 579  
580 -RS485-LN got this downlink command and send (% style="color:#4f81bd" %)**0A 08 00 04 00 01 **(%%)to Modbus network. One of the RS485 sensor in the network send back Modbus reply **0A 08 00 04 00 00**. RS485-LN get this reply and combine with the original downlink command and uplink. The uplink message is:
581 581  
582 - **A8** (% style="color:#4f81bd" %)**0A 08 00 04 00  **(% style="color:red" %)**01 06** ** **(% style="color:green" %)**0A 08 00 04 00 00**
583 583  
584 - [[image:1654159460680-153.png]]
585 585  
577 +==== Set Payload version ====
586 586  
587 -
588 -==== **Set Payload version** ====
589 -
590 590  This is the first byte of the uplink payload. RS485-BL can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
591 591  
592 -* **AT Command:**
581 +* AT Command:
593 593  
594 -(% class="box infomessage" %)
595 -(((
596 -**AT+PAYVER: Set PAYVER field = 1**
597 -)))
583 +AT+PAYVER: Set PAYVER field = 1
598 598  
599 -* **Downlink Payload:**
600 600  
601 -**0xAE 01**  ~-~-> Set PAYVER field =  0x01
586 +* Downlink Payload:
602 602  
603 -**0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
588 +0xAE 01   à Set PAYVER field =  0x01
604 604  
590 +0xAE 0F   à Set PAYVER field =  0x0F
605 605  
606 606  
607 -==== **Set RS485 Sampling Commands** ====
593 +==== Set RS485 Sampling Commands ====
608 608  
609 -AT+COMMANDx or AT+DATACUTx
595 +AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
610 610  
611 -These three commands are used to configure how the RS485-LN polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
597 +These three commands are used to configure how the RS485-BL polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>path:#polling_485]].
612 612  
613 613  
614 -* **AT Command:**
600 +* AT Command:
615 615  
616 -(% class="box infomessage" %)
617 -(((
618 -**AT+COMMANDx: Configure RS485 read command to sensor.**
619 -)))
602 +AT+COMMANDx: Configure RS485 read command to sensor.
620 620  
621 -(% class="box infomessage" %)
622 -(((
623 -**AT+DATACUTx: Configure how to handle return from RS485 devices.**
624 -)))
604 +AT+DATACUTx: Configure how to handle return from RS485 devices.
625 625  
606 +AT+SEARCHx: Configure search command
626 626  
627 -* **Downlink Payload:**
628 628  
629 -**0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
609 +* Downlink Payload:
630 630  
631 -(% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
611 +0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
632 632  
613 +Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
614 +
633 633  Format: AF MM NN LL XX XX XX XX YY
634 634  
635 635  Where:
636 636  
637 637  * MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
638 -* NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
639 -* LL:  The length of AT+COMMAND or AT+DATACUT command
620 +* NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
621 +* LL: The length of AT+COMMAND or AT+DATACUT command
640 640  * XX XX XX XX: AT+COMMAND or AT+DATACUT command
641 -* YY:  If YY=0, RS485-BL will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.
623 +* YY: If YY=0, RS485-BL will execute the downlink command without uplink; if YY=1, RS485-BL will execute an uplink after got this command.
642 642  
643 -**Example:**
625 +Example:
644 644  
645 -(% style="color:#037691" %)**AF 03 01 06 0A 05 00 04 00 01 00**(%%): Same as AT+COMMAND3=0A 05 00 04 00 01,1
627 +**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
646 646  
647 -(% style="color:#037691" %)**AF 03 02 06**(% style="color:orange" %)** 10 **(% style="color:red" %)**01 **(% style="color:green" %)**05 06 09 0A**(% style="color:#037691" %)** 00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**16**(%%),(% style="color:red" %)**1**(%%),(% style="color:green" %)**5+6+9+10**
629 +**AF 03 02 06 10 01 05 06 09 0A 00**: Same as AT+DATACUT3=**16**,**1**,**5+6+9+10**
648 648  
649 -(% style="color:#037691" %)**AF 03 02 06 **(% style="color:orange" %)**0B**(% style="color:red" %)** 02 **(% style="color:green" %)**05 07 08 0A **(% style="color:#037691" %)**00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**11**(%%),(% style="color:red" %)**2**(%%),(% style="color:green" %)**5~~7+8~~10**
631 +**AF 03 02 06 0B 02 05 07 08 0A 00**: Same as AT+DATACUT3=**11**,**2**,**5~~7+8~~10**
650 650  
651 651  
634 +0xAB downlink command can be used for set AT+SEARCHx
652 652  
653 -==== **Fast command to handle MODBUS device** ====
636 +Example: **AB aa 01 03 xx xx xx** (03 here means there are total 3 bytes after 03) So
654 654  
638 +* AB aa 01 03 xx xx xx  same as AT+SEARCHaa=1,xx xx xx
639 +* AB aa 02 03 xx xx xx 02 yy yy(03 means there are 3 bytes after 03, they are xx xx xx;02 means there are 2 bytes after 02, they are yy yy) so the commands
640 +
641 +**AB aa 02 03 xx xx xx 02 yy yy**  same as **AT+SEARCHaa=2,xx xx xx+yy yy**
642 +
643 +
644 +==== Fast command to handle MODBUS device ====
645 +
655 655  AT+MBFUN is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
656 656  
657 657  This command is valid since v1.3 firmware version
658 658  
659 -AT+MBFUN can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
660 660  
651 +AT+MBFUN has only two value:
661 661  
662 -**Example:**
653 +* AT+MBFUN=1: Enable Modbus reading. And get response base on the MODBUS return
663 663  
664 -* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
665 -* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
666 -* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
655 +AT+MBFUN=1, device can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
667 667  
668 -[[image:image-20220602165351-6.png]]
657 +* AT+MBFUN=0: Disable Modbus fast reading.
669 669  
670 -[[image:image-20220602165351-7.png]]
659 +Example:
671 671  
661 +* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
662 +* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
663 +* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
672 672  
665 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]
673 673  
674 -==== **RS485 command timeout** ====
675 675  
676 -Some Modbus device has slow action to send replies. This command is used to configure the RS485-LN to use longer time to wait for their action.
668 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
677 677  
678 -Default value: 0, range:  0 ~~ 65 seconds
679 679  
680 -* **AT Command:**
671 +* Downlink Commands:
681 681  
682 -(% class="box infomessage" %)
683 -(((
684 -**AT+CMDDLaa=hex(bb cc)*1000**
685 -)))
673 +A9 aa -à Same as AT+MBFUN=aa
686 686  
687 -**Example:**
688 688  
689 -**AT+CMDDL1=1000** to send the open time to 1000ms
676 +==== RS485 command timeout ====
690 690  
678 +Some Modbus device has slow action to send replies. This command is used to configure the RS485-BL to use longer time to wait for their action.
691 691  
692 -* **Downlink Payload:**
680 +Default value: 0, range:  0 ~~ 5 seconds
693 693  
694 -**0x AA aa bb cc**
695 695  
696 -Same as: AT+CMDDLaa=hex(bb cc)*1000
683 +* AT Command:
697 697  
698 - **Example:**
685 +AT+CMDDLaa=hex(bb cc)
699 699  
700 - 0xAA 01 00 01  ~-~-> Same as **AT+CMDDL1=1000 ms**
687 +Example:
701 701  
689 +**AT+CMDDL1=1000** to send the open time to 1000ms
702 702  
703 703  
704 -==== **Uplink payload mode** ====
692 +* Downlink Payload:
705 705  
706 -Define to use one uplink or multiple uplinks for the sampling.
694 +0x AA aa bb cc
707 707  
708 -The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]
696 +Same as: AT+CMDDLaa=hex(bb cc)
709 709  
710 -* **AT Command:**
698 + Example:
711 711  
712 -(% class="box infomessage" %)
713 -(((
714 -**AT+DATAUP=0**
715 -)))
700 + 0xAA 01 03 E8  à Same as **AT+CMDDL1=1000 ms**
716 716  
717 -(% class="box infomessage" %)
718 -(((
719 -**AT+DATAUP=1**
720 -)))
721 721  
703 +==== [[Uplink>>path:#downlink_A8]] payload mode ====
722 722  
723 -* **Downlink Payload:**
705 +Define to use one uplink or multiple uplinks for the sampling.
724 724  
725 -**0xAD 00**  **~-~->** Same as AT+DATAUP=0
707 +The use of this command please see: [[Compose Uplink payload>>path:#DataUP]]
726 726  
727 -**0xAD 01**  **~-~->** Same as AT+DATAUP=1
709 +* AT Command:
728 728  
711 +AT+DATAUP=0
729 729  
713 +AT+DATAUP=1
730 730  
731 -==== **Manually trigger an Uplink** ====
732 732  
733 -Ask device to send an uplink immediately.
716 +* Downlink Payload:
734 734  
735 -* **AT Command:**
718 +0xAD 00   à Same as AT+DATAUP=0
736 736  
737 -No AT Command for this, user can press the [[ACT button>>path:#Button]] for 1 second for the same.
720 +0xAD 01   à Same as AT+DATAUP=1
738 738  
739 739  
740 -* **Downlink Payload:**
723 +==== Manually trigger an Uplink ====
741 741  
742 -**0x08 FF**, RS485-LN will immediately send an uplink.
725 +Ask device to send an uplink immediately.
743 743  
727 +* Downlink Payload:
744 744  
729 +0x08 FF, RS485-BL will immediately send an uplink.
745 745  
746 -==== **Clear RS485 Command** ====
747 747  
732 +==== Clear RS485 Command ====
733 +
748 748  The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
749 749  
750 -* **AT Command:**
751 751  
737 +* AT Command:
738 +
752 752  **AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
753 753  
754 754  Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
... ... @@ -756,50 +756,43 @@
756 756  Example screen shot after clear all RS485 commands. 
757 757  
758 758  
746 +
759 759  The uplink screen shot is:
760 760  
761 -[[image:1654160691922-496.png]][[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png]]
749 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
762 762  
763 763  
764 -* **Downlink Payload:**
752 +* Downlink Payload:
765 765  
766 -**0x09 aa bb** same as AT+CMDEAR=aa,bb
754 +0x09 aa bb same as AT+CMDEAR=aa,bb
767 767  
768 768  
757 +==== Set Serial Communication Parameters ====
769 769  
770 -==== **Set Serial Communication Parameters** ====
771 -
772 772  Set the Rs485 serial communication parameters:
773 773  
774 -* **AT Command:**
761 +* AT Command:
775 775  
776 776  Set Baud Rate:
777 777  
778 -(% class="box infomessage" %)
779 -(((
780 -**AT+BAUDR=9600**    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
781 -)))
765 +AT+BAUDR=9600    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
782 782  
783 -Set UART Parity
784 784  
785 -(% class="box infomessage" %)
786 -(((
787 -**AT+PARITY=0**    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
788 -)))
768 +Set UART parity
789 789  
770 +AT+PARITY=0    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
771 +
772 +
790 790  Set STOPBIT
791 791  
792 -(% class="box infomessage" %)
793 -(((
794 -**AT+STOPBIT=0**    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
795 -)))
775 +AT+STOPBIT=0    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
796 796  
797 797  
798 -* **Downlink Payload:**
778 +* Downlink Payload:
799 799  
800 -**A7 01 aa bb**: Same  AT+BAUDR=hex(aa bb)*100
780 +A7 01 aa bb: Same  AT+BAUDR=hex(aa bb)*100
801 801  
802 -**Example:**
782 +Example:
803 803  
804 804  * A7 01 00 60   same as AT+BAUDR=9600
805 805  * A7 01 04 80  same as AT+BAUDR=115200
... ... @@ -809,283 +809,287 @@
809 809  A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
810 810  
811 811  
812 -== 3.6 Listening mode for RS485 network ==
792 +==== Control output power duration ====
813 813  
814 -This feature support since firmware v1.4
794 +User can set the output power duration before each sampling.
815 815  
816 -RS485-LN supports listening mode, it can listen the RS485 network packets and send them via LoRaWAN uplink. Below is the structure. The blue arrow shows the RS485 network packets to RS485-LN.
796 +* AT Command:
817 817  
818 -[[image:image-20220602171200-8.png||height="567" width="1007"]]
798 +Example:
819 819  
820 -To enable the listening mode, use can run the command AT+RXMODE.
800 +AT+3V3T=1000 ~/~/ 3V3 output power will open 1s before each sampling.
821 821  
802 +AT+5VT=1000 ~/~/ +5V output power will open 1s before each sampling.
822 822  
823 -(% border="1" style="background-color:#ffffcc; width:500px" %)
824 -|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
825 -|(% style="width:161px" %)AT+RXMODE=1,10 |(% style="width:337px" %)Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.
826 -|(% style="width:161px" %)AT+RXMODE=2,500|(% style="width:337px" %)Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms
827 -|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
828 -|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
829 829  
830 -**Downlink Command:**
805 +* LoRaWAN Downlink Command:
831 831  
832 -**0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
807 +07 01 aa bb  Same as AT+5VT=(aa bb)
833 833  
809 +07 02 aa bb  Same as AT+3V3T=(aa bb)
834 834  
835 -**Example**:
836 836  
837 -The RS485-LN is set to AT+RXMODE=2,1000
838 838  
839 -There is a two Modbus commands in the RS485 network as below:
840 840  
841 -The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
814 +1.
815 +11. Buttons
842 842  
843 -And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
817 +|**Button**|**Feature**
818 +|**RST**|Reboot RS485-BL
844 844  
845 -RS485-LN will capture both and send the uplink: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b  (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
820 +1.
821 +11. +3V3 Output
846 846  
847 -[[image:image-20220602171200-9.png]]
823 +RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
848 848  
825 +The +3V3 output will be valid for every sampling. RS485-BL will enable +3V3 output before all sampling and disable the +3V3 after all sampling. 
849 849  
850 -(% style="color:red" %)Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.
851 851  
828 +The +3V3 output time can be controlled by AT Command.
852 852  
853 -== 3.7 Buttons ==
830 +**AT+3V3T=1000**
854 854  
832 +Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
855 855  
856 -(% border="1" style="background-color:#f7faff; width:500px" %)
857 -|=**Button**|=(% style="width: 1420px;" %)**Feature**
858 -|**ACT**|(% style="width:1420px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**
859 -|**RST**|(% style="width:1420px" %)Reboot RS485
860 -|**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>path:#upgrade_image]]
861 861  
835 +By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
862 862  
863 -== 3.8 LEDs ==
864 864  
865 -(% border="1" style="background-color:#f7faff; width:500px" %)
866 -|=**LEDs**|=**Feature**
867 -|**PWR**|Always on if there is power
868 -|**SYS**|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN** (%%)for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds**(%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.
838 +1.
839 +11. +5V Output
869 869  
841 +RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
870 870  
871 -= 4. Case Study =
843 +The +5V output will be valid for every sampling. RS485-BL will enable +5V output before all sampling and disable the +5v after all sampling. 
872 872  
873 -User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]
874 874  
846 +The 5V output time can be controlled by AT Command.
875 875  
876 -= 5. Use AT Command =
848 +**AT+5VT=1000**
877 877  
878 -== 5.1 Access AT Command ==
850 +Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
879 879  
880 -RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
881 881  
882 -[[image:1654162355560-817.png]]
853 +By default, the AT+5VT=0. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.
883 883  
884 884  
885 -In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
886 886  
887 -[[image:1654162368066-342.png]]
888 888  
858 +1.
859 +11. LEDs
889 889  
890 -More detail AT Command manual can be found at [[AT Command Manual>>||anchor="3.5ConfigureRS485-BLviaATorDownlink"]]
861 +|**LEDs**|**Feature**
862 +|**LED1**|Blink when device transmit a packet.
891 891  
864 +1.
865 +11. Switch Jumper
892 892  
893 -== 5.2 Common AT Command Sequence ==
867 +|**Switch Jumper**|**Feature**
868 +|**SW1**|(((
869 +ISP position: Upgrade firmware via UART
894 894  
895 -=== 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
896 -
897 -If device has not joined network yet:
898 -
899 -(% class="box infomessage" %)
900 -(((
901 -**AT+FDR**
871 +Flash position: Configure device, check running status.
902 902  )))
873 +|**SW2**|(((
874 +5V position: set to compatible with 5v I/O.
903 903  
904 -(% class="box infomessage" %)
905 -(((
906 -**AT+NJM=0**
876 +3.3v position: set to compatible with 3.3v I/O.,
907 907  )))
908 908  
909 -(% class="box infomessage" %)
910 -(((
911 -**ATZ**
912 -)))
879 ++3.3V: is always ON
913 913  
881 ++5V: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
914 914  
915 -If device already joined network:
883 +1. Case Study
916 916  
917 -(% class="box infomessage" %)
918 -(((
919 -**AT+NJM=0**
920 -)))
885 +User can check this URL for some case studies.
921 921  
922 -(% class="box infomessage" %)
923 -(((
924 -**ATZ**
925 -)))
887 +[[http:~~/~~/wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS>>url:http://wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS]]
926 926  
927 927  
928 -=== 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
929 929  
930 930  
931 -(% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
892 +1. Use AT Command
893 +11. Access AT Command
932 932  
933 -(% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%)Set to ABP mode
895 +RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
934 934  
935 -(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
897 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
936 936  
937 -(% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%)Set Data Rate
938 938  
939 -(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
900 +In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
940 940  
941 -(% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) Set transmit frequency to 868.4Mhz
902 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
942 942  
943 -(% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
944 944  
945 -(% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
946 946  
947 -(% style="background-color:#dcdcdc" %)**AT+DADDR=26** (%%) 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
906 +More detail AT Command manual can be found at [[AT Command Manual>>path:#AT_COMMAND]]
948 948  
949 -(% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
950 950  
951 951  
952 -(% style="color:red" %)**Note:**
910 +1.
911 +11. Common AT Command Sequence
912 +111. Multi-channel ABP mode (Use with SX1301/LG308)
953 953  
954 -(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
955 -2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
956 -3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
957 -4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
914 +If device has not joined network yet:
958 958  
959 -[[image:1654162478620-421.png]]
916 +AT+FDR
960 960  
918 +AT+NJM=0
961 961  
962 -= 6. FAQ =
920 +ATZ
963 963  
964 -== 6.1 How to upgrade the image? ==
965 965  
966 -The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
923 +If device already joined network:
967 967  
968 -* Support new features
969 -* For bug fix
970 -* Change LoRaWAN bands.
925 +AT+NJM=0
971 971  
972 -Below shows the hardware connection for how to upload an image to RS485-LN:
927 +ATZ
973 973  
974 -[[image:1654162535040-878.png]]
929 +1.
930 +11.
931 +111. Single-channel ABP mode (Use with LG01/LG02)
975 975  
976 -**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
933 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
977 977  
978 -**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
935 +AT+NJM=0 Set to ABP mode
979 979  
980 -**Step3: **Open flashloader; choose the correct COM port to update.
937 +AT+ADR=0 Set the Adaptive Data Rate Off
981 981  
982 -(% style="color:blue" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.
939 +AT+DR=5  Set Data Rate
983 983  
941 +AT+TDC=60000  Set transmit interval to 60 seconds
984 984  
985 -[[image:image-20220602175818-12.png]]
943 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
986 986  
945 +AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
987 987  
988 -[[image:image-20220602175848-13.png]]
947 +AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
989 989  
949 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
990 990  
991 -[[image:image-20220602175912-14.png]]
951 +ATZ          Reset MCU
992 992  
953 +**Note:**
993 993  
994 -**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
955 +1. Make sure the device is set to ABP mode in the IoT Server.
956 +1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
957 +1. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
958 +1. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
995 995  
996 -[[image:image-20220602175638-10.png]]
960 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
997 997  
998 998  
999 -== 6.2 How to change the LoRa Frequency Bands/Region? ==
963 +1. FAQ
964 +11. How to upgrade the image?
1000 1000  
1001 -User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
966 +The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1002 1002  
968 +* Support new features
969 +* For bug fix
970 +* Change LoRaWAN bands.
1003 1003  
1004 -== 6.3 How many RS485-Slave can RS485-BL connects? ==
972 +Below shows the hardware connection for how to upload an image to RS485-BL:
1005 1005  
1006 -The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
974 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1007 1007  
976 +**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1008 1008  
1009 -== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
978 +**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1010 1010  
1011 -When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
980 +**Step3: **Open flashloader; choose the correct COM port to update.
1012 1012  
1013 -Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
1014 1014  
983 +|(((
984 +HOLD PRO then press the RST button, SYS will be ON, then click next
985 +)))
1015 1015  
1016 -= 7. Trouble Shooting =
987 +|(((
988 +Board detected
989 +)))
1017 1017  
1018 -== 7.1 Downlink doesn’t work, how to solve it? ==
991 +|(((
992 +
993 +)))
1019 1019  
1020 -Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
995 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]]
1021 1021  
1022 1022  
1023 -== 7.2 Why I can’t join TTN V3 in US915 /AU915 bands? ==
1024 1024  
1025 -It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
999 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]]
1026 1026  
1027 1027  
1028 -= 8. Order Info =
1002 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]
1029 1029  
1030 -(% style="color:blue" %)**Part Number: RS485-LN-XXX**
1031 1031  
1032 -(% style="color:blue" %)**XXX:**
1005 +1.
1006 +11. How to change the LoRa Frequency Bands/Region?
1033 1033  
1034 -* (% style="color:blue" %)**EU433**(%%): frequency bands EU433
1035 -* (% style="color:blue" %)**EU868**(%%): frequency bands EU868
1036 -* (% style="color:blue" %)**KR920**(%%): frequency bands KR920
1037 -* (% style="color:blue" %)**CN470**(%%): frequency bands CN470
1038 -* (% style="color:blue" %)**AS923**(%%): frequency bands AS923
1039 -* (% style="color:blue" %)**AU915**(%%): frequency bands AU915
1040 -* (% style="color:blue" %)**US915**(%%): frequency bands US915
1041 -* (% style="color:blue" %)**IN865**(%%): frequency bands IN865
1042 -* (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1043 -* (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1008 +User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1044 1044  
1045 1045  
1046 -= 9.Packing Info =
1047 1047  
1012 +1.
1013 +11. How many RS485-Slave can RS485-BL connects?
1048 1048  
1049 -**Package Includes**:
1015 +The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>path:#downlink_A8]].
1050 1050  
1051 -* RS485-LN x 1
1052 -* Stick Antenna for LoRa RF part x 1
1053 -* Program cable x 1
1054 1054  
1055 -**Dimension and weight**:
1056 1056  
1057 -* Device Size: 13.5 x 7 x 3 cm
1058 -* Device Weight: 105g
1059 -* Package Size / pcs : 14.5 x 8 x 5 cm
1060 -* Weight / pcs : 170g
1061 1061  
1020 +1. Trouble Shooting     
1021 +11. Downlink doesn’t work, how to solve it?
1062 1062  
1063 -= 10. FCC Caution for RS485LN-US915 =
1023 +Please see this link for debug:
1064 1064  
1065 -Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
1025 +[[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug>>url:http://wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug]] 
1066 1066  
1067 -This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
1068 1068  
1069 1069  
1070 -**IMPORTANT NOTE:**
1029 +1.
1030 +11. Why I can’t join TTN V3 in US915 /AU915 bands?
1071 1071  
1072 -**Note: **This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
1032 +It might about the channels mapping. Please see for detail.
1073 1073  
1074 -—Reorient or relocate the receiving antenna.
1034 +[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1075 1075  
1076 -—Increase the separation between the equipment and receiver.
1077 1077  
1078 -—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
1079 1079  
1080 -—Consult the dealer or an experienced radio/TV technician for help.
1038 +1. Order Info
1081 1081  
1040 +**Part Number: RS485-BL-XXX**
1082 1082  
1083 -**FCC Radiation Exposure Statement:**
1042 +**XXX:**
1084 1084  
1085 -This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
1044 +* **EU433**: frequency bands EU433
1045 +* **EU868**: frequency bands EU868
1046 +* **KR920**: frequency bands KR920
1047 +* **CN470**: frequency bands CN470
1048 +* **AS923**: frequency bands AS923
1049 +* **AU915**: frequency bands AU915
1050 +* **US915**: frequency bands US915
1051 +* **IN865**: frequency bands IN865
1052 +* **RU864**: frequency bands RU864
1053 +* **KZ865: **frequency bands KZ865
1086 1086  
1055 +1. Packing Info
1087 1087  
1088 -= 11. Support =
1057 +**Package Includes**:
1089 1089  
1059 +* RS485-BL x 1
1060 +* Stick Antenna for LoRa RF part x 1
1061 +* Program cable x 1
1062 +
1063 +**Dimension and weight**:
1064 +
1065 +* Device Size: 13.5 x 7 x 3 cm
1066 +* Device Weight: 105g
1067 +* Package Size / pcs : 14.5 x 8 x 5 cm
1068 +* Weight / pcs : 170g
1069 +
1070 +1. Support
1071 +
1090 1090  * 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.
1091 -* 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:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
1073 +* 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
1074 +
1075 +[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
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