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704	704
705	705	==== **Set RS485 Sampling Commands** ====
706	706
707		-(((
708	708	AT+COMMANDx or AT+DATACUTx
709		-)))
710	710
711		-(((
712	712	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		-)))
714	714
715		-(((
716		-
717		-)))
718	718
719		-* (((
720		-**AT Command:**
721		-)))
	712	+* **AT Command:**
722	722
723	723	(% class="box infomessage" %)
724	724	(((
725		-(((
726	726	**AT+COMMANDx: Configure RS485 read command to sensor.**
727	727	)))
728		-)))
729	729
730	730	(% class="box infomessage" %)
731	731	(((
732		-(((
733	733	**AT+DATACUTx: Configure how to handle return from RS485 devices.**
734	734	)))
735		-)))
736	736
737		-(((
738		-
739		-)))
740	740
741		-* (((
742		-**Downlink Payload:**
743		-)))
	725	+* **Downlink Payload:**
744	744
745		-(((
746	746	**0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
747		-)))
748	748
749		-(((
750	750	(% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
751		-)))
752	752
753		-(((
754	754	Format: AF MM NN LL XX XX XX XX YY
755		-)))
756	756
757		-(((
758	758	Where:
759		-)))
760	760
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		-)))
	735	+* MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
	736	+* NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
	737	+* LL:  The length of AT+COMMAND or AT+DATACUT command
	738	+* XX XX XX XX: AT+COMMAND or AT+DATACUT command
	739	+* 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.
776	776
777		-(((
778	778	**Example:**
779		-)))
780	780
781		-(((
782	782	(% 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		-)))
784	784
785		-(((
786	786	(% 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		-)))
788	788
789		-(((
790	790	(% 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		-)))
792	792
793	793
794	794
795		-
796	796	==== **Fast command to handle MODBUS device** ====
797	797
798		-(((
799	799	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]].
800		-)))
801	801
802		-(((
803	803	This command is valid since v1.3 firmware version
804		-)))
805	805
806		-(((
807	807	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.
808		-)))
809	809
810		-(((
811		-
812		-)))
813	813
814		-(((
815	815	**Example:**
816		-)))
817	817
818		-* (((
819		-AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
820		-)))
821		-* (((
822		-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.
823		-)))
824		-* (((
825		-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.
826		-)))
	762	+* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
	763	+* 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.
	764	+* 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.
827	827
828	828	[[image:image-20220602165351-6.png]]
829	829