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1		-(% class="wikigeneratedid" %)
2		- **Contents:**
3		-
4		-{{toc/}}
5		-
6	6	= 1. Introduction =
7	7
8	8	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
...	...	@@ -11,17 +11,15 @@
11	11
12	12	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Relay and VFD and communicate with Mobile. The structure is like below:
13	13
14		-[[image:image-20220527091852-1.png]]
	9	+[[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
15	15
16	16	Connection
17	17
18	18
	14	+[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
19	19
20		-[[image:image-20220527091942-2.png]](% style="display:none" %)
21		-
22	22	Connection
23	23
24		-
25	25	Related documents:
26	26
27	27	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
...	...	@@ -32,12 +32,12 @@
32	32
33	33	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
34	34
35		-[[image:image-20220527092058-3.png]]
	28	+[[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
36	36
37	37	Connection
38	38
39	39
40		-[[image:image-20220527092146-4.png]]
	33	+[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
41	41
42	42	Connection
43	43
...	...	@@ -44,8 +44,6 @@
44	44	* [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/]] : Configure Document
45	45	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
46	46
47		-== ==
48		-
49	49	== 1.3 Example3: Use RS485-LN with energy meters ==
50	50
51	51	=== 1.3.1 OverView ===
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58	58	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
59	59	)))
60	60
61		-[[image:image-20220527092419-5.png]]
	52	+[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
62	62
63	63	Connection1
64	64
65		-
66		-(((
67	67	How to connect with Energy Meter：
68		-)))
69	69
70		-(((
71	71	Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
72		-)))
73	73
74		-(((
75	75	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
76		-)))
77	77
78		-(((
79	79	Power Source VIN to RS485-LN VIN+
80		-)))
81	81
82		-(((
83	83	Power Source GND to RS485-LN VIN-
84		-)))
85	85
86		-(((
87	87	Once there is power, the RS485-LN will be on.
88		-)))
89	89
90		-[[image:image-20220527092514-6.png]]
	68	+[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
91	91
92	92	Connection2
93	93
94	94
95		-[[image:image-20220527092555-7.png]]
	73	+[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
96	96
97	97	Connection3
98	98
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101	101
102	102	If the user needs to read the parameters of the electric energy meter and use the modbus command,please refer to the appendix of the MODBUS communication protocol in the user manual of the energy meter.
103	103
104		-[[image:image-20220527092629-8.png]]
	82	+[[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
105	105
106		-
107	107	(% class="box infomessage" %)
108	108	(((
109		-**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
	86	+Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
110	110	)))
111	111
112	112	* The first byte : slave address code (=001～247)
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121	121
122	122	(% class="box infomessage" %)
123	123	(((
124		-**Example:** RETURN1：01 03 02 08 FD 7E 05
	101	+Example:RETURN1：01 03 02 08 FD 7E 05
125	125	)))
126	126
127	127	* The first byte ARD: slave address code (=001～254)
...	...	@@ -131,16 +131,10 @@
131	131	* The 6th and 7th bytes: CRC16 checksum
132	132	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
133	133
134		-(% class="wikigeneratedid" %)
135		-(((
136		-
137		-)))
138		-
139	139	=== 1.3.3 How to configure RS485-LN and parse output commands ===
140	140
141	141	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
142	142
143		-
144	144	==== 1.3.3.1 via AT COMMAND: ====
145	145
146	146	First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
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149	149	If the configured parameters and commands are incorrect, the return value is not obtained.
150	150	)))
151	151
152		-[[image:image-20220527092748-9.png]]
	123	+[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
153	153
154	154	AT COMMAND
155	155
156		-
157	157	(% class="box infomessage" %)
158	158	(((
159		- AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
	129	+AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
160	160	)))
161	161
162	162	a: length for the return of AT+COMMAND
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165	165
166	166	c: define the position for valid value.
167	167
168		-[[image:image-20220527092936-10.png]]
	138	+[[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
169	169
170	170	AT COMMAND
171	171
172		-
173	173	PAYLOAD is available after the valid value is intercepted.
174	174
175	175
176		-[[image:image-20220527093059-11.png]]
	145	+[[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
177	177
178	178	AT COMMAND
179	179
180		-
181	181	You can get configured PAYLOAD on TTN.
182	182
183		-[[image:image-20220527093133-12.png]]
184	184
	152	+[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
	153	+
185	185	(((
186	186	AT COMMAND
187	187	)))
...	...	@@ -230,14 +230,14 @@
230	230	Payload:01 00 02 39 85 08 DC 00 00 00 44
231	231	)))
232	232
233		-[[image:image-20220527093204-13.png]]
	202	+[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
234	234
235	235	AT COMMAND
236	236
	206	+01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
237	237
238		-(% style="color:#4f81bd" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
239	239
240		-[[image:image-20220527093251-14.png]]
	209	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/AT_COMMAND11.png/600px-AT_COMMAND11.png~|~|height="271" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:AT_COMMAND11.png]]
241	241
242	242	AT COMMAND
243	243
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244	244
245	245	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
246	246
247		-[[image:image-20220527093358-15.png]]
	216	+[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
248	248
249	249	(((
250	250	DOWNLINK
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255	255	)))
256	256
257	257	(((
258		-**Type Code 0xAF**
	227	+Type Code 0xAF
259	259	)))
260	260
261	261	(((
262		-(% class="box infomessage" %)
263		-(((
264	264	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
265	265	)))
266		-)))
267	267
268	268	(((
269	269	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
...	...	@@ -375,7 +375,7 @@
375	375	)))
376	376
377	377	(((
378		- output：01 03 04 00 00 00 42 7A 02
	344	+ output:01 03 04 00 00 00 42 7A 02
379	379	)))
380	380
381	381	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]

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