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67	67
68	68	Connection2
69	69
70		-[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
71	71
	71	+[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="763" width="573"]]
	72	+
72	72	Connection3
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74	74
...	...	@@ -89,7 +89,9 @@
89	89	* 5th and 6th bytes: Number of registers to read
90	90	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
91	91
	93	+(((
92	92	How to parse the reading of the return command of the parameter：
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93	93
94	94	(% class="box infomessage" %)
95	95	(((
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117	117
118	118	[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
119	119
120		-**AT COMMAND**
	123	+AT COMMAND
121	121
122	122	(% class="box infomessage" %)
123	123	(((
...	...	@@ -146,27 +146,53 @@
146	146
147	147	[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
148	148
	152	+(((
149	149	AT COMMAND
	154	+)))
150	150
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	159	+
	160	+(((
151	151	**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
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152	152
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153	153	RETURN1:01 03 02 00 02 39 85 00 00(return data)
	166	+)))
154	154
	168	+(((
155	155	AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
	170	+)))
156	156
	172	+(((
157	157	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
	174	+)))
158	158
	176	+(((
159	159	RETURN2:01 03 02 08 DC BE 1D(return data)
	178	+)))
160	160
	180	+(((
161	161	AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
	182	+)))
162	162
	184	+(((
163	163	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
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164	164
	188	+(((
165	165	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
	190	+)))
166	166
	192	+(((
167	167	AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
	194	+)))
168	168
	196	+(((
169	169	Payload:01 00 02 39 85 08 DC 00 00 00 44
	198	+)))
170	170
171	171	[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
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270	270
271	271	=== 1.3.4 How to configure and output commands for RS485 to USB ===
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	302	+(((
273	273	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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274	274
	306	+(((
275	275	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
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276	276
	310	+(((
277	277	Open the serial port debugging, set the send and receive to HEX.
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278	278
	314	+(((
279	279	Baud rate: 9600
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280	280
	318	+(((
281	281	check digit: Even
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282	282
283	283	[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
284	284
285	285	USB
286	286
	326	+
287	287	[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
288	288
289	289	USB
290	290
	331	+
	332	+(((
291	291	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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292	292
293		-Example:input：01 03 00 31 00 02 95 c4
	336	+(((
	337	+**Example:**  input：01 03 00 31 00 02 95 c4
	338	+)))
294	294
295		-{{{ output:01 03 04 00 00 00 42 7A 02
296		-}}}
	340	+(((
	341	+ output:01 03 04 00 00 00 42 7A 02
	342	+)))
297	297
298	298	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
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303	303
304	304	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.
305	305
	352	+(((
306	306	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
	354	+)))
307	307
308	308	[[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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311	311
312	312	[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
313	313
314		-[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
	362	+[[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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	364	+(((
316	316	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.
	366	+)))
317	317
	368	+(((
318	318	We can use AT+CFGDEV to set the device address.
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319	319
	372	+(((
320	320	We modify the device address 01 of the first energy meter to 02.
	374	+)))
321	321
322	322	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
323	323