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550	550
551	551	==== **RS485 Debug Command** ====
552	552
553		-(((
554	554	This command is used to configure the RS485 devices; they won’t be used during sampling.
555		-)))
556	556
557		-* (((
558		-**AT Command**
559		-)))
	555	+* **AT Command**
560	560
561	561	(% class="box infomessage" %)
562	562	(((
563		-(((
564	564	**AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
565	565	)))
566		-)))
567	567
568		-(((
569	569	m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
570		-)))
571	571
572		-* (((
573		-**Downlink Payload**
574		-)))
	564	+* **Downlink Payload**
575	575
576		-(((
577	577	Format: A8 MM NN XX XX XX XX YY
578		-)))
579	579
580		-(((
581	581	Where:
582		-)))
583	583
584		-* (((
585		-MM: 1: add CRC-16/MODBUS ; 0: no CRC
586		-)))
587		-* (((
588		-NN: The length of RS485 command
589		-)))
590		-* (((
591		-XX XX XX XX: RS485 command total NN bytes
592		-)))
593		-* (((
594		-(((
595		-YY: How many bytes will be uplink from the return of this RS485 command,
596		-)))
	570	+* MM: 1: add CRC-16/MODBUS ; 0: no CRC
	571	+* NN: The length of RS485 command
	572	+* XX XX XX XX: RS485 command total NN bytes
	573	+* YY: How many bytes will be uplink from the return of this RS485 command,
	574	+** if YY=0, RS485-LN will execute the downlink command without uplink;
	575	+** if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
	576	+** if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
597	597
598		-* (((
599		-if YY=0, RS485-LN will execute the downlink command without uplink;
600		-)))
601		-* (((
602		-if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
603		-)))
604		-* (((
605		-if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
606		-)))
607		-)))
608		-
609		-(((
610	610	**Example 1** ~-~-> Configure without ask for uplink (YY=0)
611		-)))
612	612
613		-(((
614	614	To connect a Modbus Alarm with below commands.
615		-)))
616	616
617		-* (((
618		-The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.
619		-)))
	582	+* The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.
620	620
621		-* (((
622		-The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.
623		-)))
	584	+* The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.
624	624
625		-(((
626	626	So if user want to use downlink command to control to RS485 Alarm, he can use:
627		-)))
628	628
629		-(((
630	630	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
631		-)))
632	632
633		-(((
634	634	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
635		-)))
636	636
637		-(((
638	638	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.
639		-)))
640	640
641		-(((
642		-
643		-)))
644	644
645		-(((
646	646	**Example 2** ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
647		-)))
648	648
649		-(((
650	650	User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
651		-)))
652	652
653		-(((
654		-
655		-)))
656	656
657		-(((
658	658	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:
659		-)))
660	660
661		-(((
662	662	**A8** (% style="color:#4f81bd" %)**0A 08 00 04 00  **(% style="color:red" %)**01 06** ** **(% style="color:green" %)**0A 08 00 04 00 00**
663		-)))
664	664
665		-(((
666	666	[[image:1654159460680-153.png]]
667		-)))
668	668
669	669
670	670
671	671	==== **Set Payload version** ====
672	672
673		-(((
674	674	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.
675		-)))
676	676
677		-* (((
678		-**AT Command:**
679		-)))
	612	+* **AT Command:**
680	680
681	681	(% class="box infomessage" %)
682	682	(((
683		-(((
684	684	**AT+PAYVER: Set PAYVER field = 1**
685	685	)))
686		-)))
687	687
688		-* (((
689		-**Downlink Payload:**
690		-)))
	619	+* **Downlink Payload:**
691	691
692		-(((
693	693	**0xAE 01**  ~-~-> Set PAYVER field =  0x01
694		-)))
695	695
696		-(((
697	697	**0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
698		-)))
699	699
700	700
701	701