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	551	+
551	551	==== **RS485 Debug Command** ====
552	552
	554	+(((
553	553	This command is used to configure the RS485 devices; they won’t be used during sampling.
	556	+)))
554	554
555		-* **AT Command**
	558	+* (((
	559	+**AT Command**
	560	+)))
556	556
557	557	(% class="box infomessage" %)
558	558	(((
	564	+(((
559	559	**AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
560	560	)))
	567	+)))
561	561
	569	+(((
562	562	m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
	571	+)))
563	563
564		-* **Downlink Payload**
	573	+* (((
	574	+**Downlink Payload**
	575	+)))
565	565
	577	+(((
566	566	Format: A8 MM NN XX XX XX XX YY
	579	+)))
567	567
	581	+(((
568	568	Where:
	583	+)))
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.
	585	+* (((
	586	+MM: 1: add CRC-16/MODBUS ; 0: no CRC
	587	+)))
	588	+* (((
	589	+NN: The length of RS485 command
	590	+)))
	591	+* (((
	592	+XX XX XX XX: RS485 command total NN bytes
	593	+)))
	594	+* (((
	595	+(((
	596	+YY: How many bytes will be uplink from the return of this RS485 command,
	597	+)))
577	577
	599	+* (((
	600	+if YY=0, RS485-LN will execute the downlink command without uplink;
	601	+)))
	602	+* (((
	603	+if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
	604	+)))
	605	+* (((
	606	+if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
	607	+)))
	608	+)))
	609	+
	610	+(((
578	578	**Example 1** ~-~-> Configure without ask for uplink (YY=0)
	612	+)))
579	579
	614	+(((
580	580	To connect a Modbus Alarm with below commands.
	616	+)))
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.
	618	+* (((
	619	+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	+)))
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.
	622	+* (((
	623	+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	+)))
585	585
	626	+(((
586	586	So if user want to use downlink command to control to RS485 Alarm, he can use:
	628	+)))
587	587
	630	+(((
588	588	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
	632	+)))
589	589
	634	+(((
590	590	(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
	636	+)))
591	591
	638	+(((
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.
	640	+)))
593	593
	642	+(((
	643	+
	644	+)))
594	594
	646	+(((
595	595	**Example 2** ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
	648	+)))
596	596
	650	+(((
597	597	User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
	652	+)))
598	598
	654	+(((
	655	+
	656	+)))
599	599
	658	+(((
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:
	660	+)))
601	601
	662	+(((
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**
	664	+)))
603	603
	666	+(((
604	604	[[image:1654159460680-153.png]]
	668	+)))
605	605
606	606
607	607
	672	+
608	608	==== **Set Payload version** ====
609	609
	675	+(((
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.
	677	+)))
611	611
612		-* **AT Command:**
	679	+* (((
	680	+**AT Command:**
	681	+)))
613	613
614	614	(% class="box infomessage" %)
615	615	(((
	685	+(((
616	616	**AT+PAYVER: Set PAYVER field = 1**
617	617	)))
	688	+)))
618	618
619		-* **Downlink Payload:**
	690	+* (((
	691	+**Downlink Payload:**
	692	+)))
620	620
	694	+(((
621	621	**0xAE 01**  ~-~-> Set PAYVER field =  0x01
	696	+)))
622	622
	698	+(((
623	623	**0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
	700	+)))
624	624
625	625
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	704	+
627	627	==== **Set RS485 Sampling Commands** ====
628	628
	707	+(((
629	629	AT+COMMANDx or AT+DATACUTx
	709	+)))
630	630
	711	+(((
631	631	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"]].
	713	+)))
632	632
	715	+(((
	716	+
	717	+)))
633	633
634		-* **AT Command:**
	719	+* (((
	720	+**AT Command:**
	721	+)))
635	635
636	636	(% class="box infomessage" %)
637	637	(((
	725	+(((
638	638	**AT+COMMANDx: Configure RS485 read command to sensor.**
639	639	)))
	728	+)))
640	640
641	641	(% class="box infomessage" %)
642	642	(((
	732	+(((
643	643	**AT+DATACUTx: Configure how to handle return from RS485 devices.**
644	644	)))
	735	+)))
645	645
	737	+(((
	738	+
	739	+)))
646	646
647		-* **Downlink Payload:**
	741	+* (((
	742	+**Downlink Payload:**
	743	+)))
648	648
	745	+(((
649	649	**0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
	747	+)))
650	650
	749	+(((
651	651	(% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
	751	+)))
652	652
	753	+(((
653	653	Format: AF MM NN LL XX XX XX XX YY
	755	+)))
654	654
	757	+(((
655	655	Where:
	759	+)))
656	656
657		-* MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
658		-* NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
659		-* LL:  The length of AT+COMMAND or AT+DATACUT command
660		-* XX XX XX XX: AT+COMMAND or AT+DATACUT command
661		-* 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.
	761	+* (((
	762	+MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
	763	+)))
	764	+* (((
	765	+NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
	766	+)))
	767	+* (((
	768	+LL:  The length of AT+COMMAND or AT+DATACUT command
	769	+)))
	770	+* (((
	771	+XX XX XX XX: AT+COMMAND or AT+DATACUT command
	772	+)))
	773	+* (((
	774	+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.
	775	+)))
662	662
	777	+(((
663	663	**Example:**
	779	+)))
664	664
	781	+(((
665	665	(% 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
	783	+)))
666	666
	785	+(((
667	667	(% 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**
	787	+)))
668	668
	789	+(((
669	669	(% 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**
	791	+)))
670	670
671	671
672	672
	795	+
673	673	==== **Fast command to handle MODBUS device** ====
674	674
675	675	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]].