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11	11	Connection
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13	13	[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
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15	15	Connection
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29	29	Connection
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31	31	[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
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33	33	Connection
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68	68	Connection2
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71		-[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="763" width="573"]]
	73	+[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
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73	73	Connection3
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154	154	)))
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157	157	**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
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289	289	DOWNLINK
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291	291	[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
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293	293	DOWNLINK
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296	296	=== 1.3.4 How to configure and output commands for RS485 to USB ===
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298	298	This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
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300	300	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
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302	302	Open the serial port debugging, set the send and receive to HEX.
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304	304	Baud rate: 9600
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306	306	check digit: Even
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308		-[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
	325	+[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
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310	310	USB
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312		-[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
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	330	+[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
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314	314	USB
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316	316	The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
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318		-Example:input：01 03 00 31 00 02 95 c4
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	340	+**Example:**  input：01 03 00 31 00 02 95 c4
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320		-{{{ output:01 03 04 00 00 00 42 7A 02
321		-}}}
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	344	+ output:01 03 04 00 00 00 42 7A 02
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323	323	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
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329	329	If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
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331	331	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
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333	333	[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
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335		-Example:These two meters are examples of setting parameters and device addresses.
	363	+**Example**:These two meters are examples of setting parameters and device addresses.
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337		-[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
	365	+[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
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339		-[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
	367	+[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
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341	341	First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
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343	343	We can use AT+CFGDEV to set the device address.
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345	345	We modify the device address 01 of the first energy meter to 02.
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347	347	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
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