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562	562	It shows how to use RS485-LN to connect to an ultrasonic flow meter and read the data from the ultrasonic flow meter.
563	563
564	564
565		-Need to prepare RS485-LN, recharger, Electric wire
566	566
567		-[[image:1720669739434-926.png]] [[image:1720669744315-613.png]]
568		-
569		-
570		-=== 1.9.1 Setting Ultrasonic Flowmeter ===
571		-
572		-
573		-Adjust the M option corresponding to the ultrasonic flowmeter as follows
574		-
575		-M52 sets RS485 Port.
576		-
577		-[[image:1720669933691-331.png]]
578		-
579		-
580		-M62 sets 9600, none, 1
581		-
582		-[[image:1720669981767-254.png]]
583		-
584		-
585		-M63 sets automatic
586		-
587		-[[image:1720670003601-544.png]]
588		-
589		-
590		-=== 1.9.2 Setting Dragino RS485-LN ===
591		-
592		-
593		-The RS485-LN wiring port is as shown below. Connect the power supply and RS485 A/B line according to the diagram.
594		-
595		-[[image:1720670016539-422.png]][[image:1720670019136-658.png]]
596		-
597		-
598		-=== 1.9.3 Connect the RS485-LN to Ultrasonic Flowmeter ===
599		-
600		-
601		-According to the instructions of the ultrasonic flow meter, 26 and 27 are the + and - of RS485, corresponding to the A and B ports of RS485.
602		-
603		-[[image:1720670035661-234.png]][[image:1720670041974-372.png||height="417" width="436"]]
604		-
605		-
606		-=== 1.9.4 Full wiring example ===
607		-
608		-
609		-The yellow wire connects port 26 and port A of RS485-LN.
610		-
611		-The green wire connects port 27 and port B of RS485-LN.
612		-
613		-[[image:1720670079781-764.png]]
614		-
615		-
616		-=== 1.9.5 How to read ultrasonic flow meter data via RS485 ===
617		-
618		-
619		-[[image:1720670090204-634.png]]
620		-
621		-
622		-For example, I want to read Positive
623		-
624		-Through M02, we can see that the POS data is 54.9862
625		-
626		-[[image:1720670103571-173.png]][[image:1720670108127-723.png||height="597" width="645"]]
627		-
628		-Registers are 9-12, so the read command is AT+CFGDEV=01 03 00 08 00 04,1(,1 is used for automatic complement)
629		-
630		-[[image:1720670123955-149.png]]
631		-
632		-
633		-00 36 00 00 is the integer of the read value
634		-
635		-78 79 3f 7c is a decimal, but it needs to be converted and parsed into floating point. The parsing order is CDAB, which is 3f 7c 78 79
636		-
637		-Conversion and parsing website:http:~/~/www.speedfly.cn/tools/hexconvert/
638		-
639		-[[image:1720670134750-980.png]]
640		-
641		-
	566	+* **Specific steps**:  RS485-LN with ultrasonic flow meter
	567	+*

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