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550	550
551	551	==== **RS485 Debug Command** ====
552	552
	553	+(((
553	553	This command is used to configure the RS485 devices; they won’t be used during sampling.
	555	+)))
554	554
555		-* **AT Command**
	557	+* (((
	558	+**AT Command**
	559	+)))
556	556
557	557	(% class="box infomessage" %)
558	558	(((
	563	+(((
559	559	**AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
560	560	)))
	566	+)))
561	561
	568	+(((
562	562	m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
	570	+)))
563	563
564		-* **Downlink Payload**
	572	+* (((
	573	+**Downlink Payload**
	574	+)))
565	565
	576	+(((
566	566	Format: A8 MM NN XX XX XX XX YY
	578	+)))
567	567
	580	+(((
568	568	Where:
	582	+)))
569	569
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.
	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	+)))
577	577
	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	+(((
578	578	**Example 1** ~-~-> Configure without ask for uplink (YY=0)
	611	+)))
579	579
	613	+(((
580	580	To connect a Modbus Alarm with below commands.
	615	+)))
581	581
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.
	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	+)))
583	583
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.
	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	+)))
585	585
	625	+(((
586	586	So if user want to use downlink command to control to RS485 Alarm, he can use:
	627	+)))
587	587
	629	+(((
588	588	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
	631	+)))
589	589
	633	+(((
590	590	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
	635	+)))
591	591
	637	+(((
592	592	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	+)))
593	593
	641	+(((
	642	+
	643	+)))
594	594
	645	+(((
595	595	**Example 2** ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
	647	+)))
596	596
	649	+(((
597	597	User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
	651	+)))
598	598
	653	+(((
	654	+
	655	+)))
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	657	+(((
600	600	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	+)))
601	601
	661	+(((
602	602	**A8** (% style="color:#4f81bd" %)**0A 08 00 04 00  **(% style="color:red" %)**01 06** ** **(% style="color:green" %)**0A 08 00 04 00 00**
	663	+)))
603	603
	665	+(((
604	604	[[image:1654159460680-153.png]]
	667	+)))
605	605
606	606
607	607
608	608	==== **Set Payload version** ====
609	609
	673	+(((
610	610	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	+)))
611	611
612		-* **AT Command:**
	677	+* (((
	678	+**AT Command:**
	679	+)))
613	613
614	614	(% class="box infomessage" %)
615	615	(((
	683	+(((
616	616	**AT+PAYVER: Set PAYVER field = 1**
617	617	)))
	686	+)))
618	618
619		-* **Downlink Payload:**
	688	+* (((
	689	+**Downlink Payload:**
	690	+)))
620	620
	692	+(((
621	621	**0xAE 01**  ~-~-> Set PAYVER field =  0x01
	694	+)))
622	622
	696	+(((
623	623	**0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
	698	+)))
624	624
625	625
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