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From version < 21.2 >
edited by Xiaoling
on 2022/05/27 09:34
To version < 1.11 >
edited by Xiaoling
on 2022/05/12 10:07
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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 +11,14 @@
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  
13 +[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
18 18  
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
... ... @@ -32,20 +32,17 @@
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]]
27 +[[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  
31 +[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
39 39  
40 -[[image:image-20220527092146-4.png]]
41 -
42 42  Connection
43 43  
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 ===
... ... @@ -58,42 +58,28 @@
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]]
50 +[[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]]
66 +[[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  
70 +[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
94 94  
95 -[[image:image-20220527092555-7.png]]
96 -
97 97  Connection3
98 98  
99 99  
... ... @@ -101,12 +101,11 @@
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]]
79 +[[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
83 +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)
... ... @@ -115,13 +115,11 @@
115 115  * 5th and 6th bytes: Number of registers to read
116 116  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
117 117  
118 -(((
119 119  How to parse the reading of the return command of the parameter：
120 -)))
121 121  
122 122  (% class="box infomessage" %)
123 123  (((
124 -**Example:** RETURN1：01 03 02 08 FD 7E 05
96 +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.
... ... @@ -149,14 +149,13 @@
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]]
118 +[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
153 153  
154 -AT COMMAND
120 +**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
124 +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
... ... @@ -165,79 +165,52 @@
165 165  
166 166  c: define the position for valid value.
167 167  
168 -[[image:image-20220527092936-10.png]]
133 +[[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]]
140 +[[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  
185 -(((
147 +[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
148 +
186 186  AT COMMAND
187 -)))
188 188  
189 -(((
190 -
191 -)))
192 -
193 -(((
194 194  **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
195 -)))
196 196  
197 -(((
198 198  RETURN1:01 03 02 00 02 39 85 00 00(return data)
199 -)))
200 200  
201 -(((
202 202  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.
203 -)))
204 204  
205 -(((
206 206  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
207 -)))
208 208  
209 -(((
210 210  RETURN2:01 03 02 08 DC BE 1D(return data)
211 -)))
212 212  
213 -(((
214 214  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.
215 -)))
216 216  
217 -(((
218 218  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
219 -)))
220 220  
221 -(((
222 222  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
223 -)))
224 224  
225 -(((
226 226  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.
227 -)))
228 228  
229 -(((
230 230  Payload:01 00 02 39 85 08 DC 00 00 00 44
231 -)))
232 232  
233 -[[image:image-20220527093204-13.png]]
171 +[[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  
175 +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]]
178 +[[~[~[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  
... ... @@ -244,7 +244,7 @@
244 244  
245 245  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
246 246  
247 -[[image:image-20220527093358-15.png]]
185 +[[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
... ... @@ -255,15 +255,12 @@
255 255  )))
256 256  
257 257  (((
258 -**Type Code 0xAF**
196 +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.
... ... @@ -328,7 +328,6 @@
328 328  
329 329  DOWNLINK
330 330  
331 -
332 332  [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
333 333  
334 334  DOWNLINK
... ... @@ -336,47 +336,30 @@
336 336  
337 337  === 1.3.4 How to configure and output commands for RS485 to USB ===
338 338  
339 -(((
340 340  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.
341 -)))
342 342  
343 -(((
344 344  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
345 -)))
346 346  
347 -(((
348 348  Open the serial port debugging, set the send and receive to HEX.
349 -)))
350 350  
351 -(((
352 352  Baud rate: 9600
353 -)))
354 354  
355 -(((
356 356  check digit: Even
357 -)))
358 358  
359 -[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
283 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
360 360  
361 361  USB
362 362  
287 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
363 363  
364 -[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
365 -
366 366  USB
367 367  
368 -
369 -(((
370 370  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.
371 -)))
372 372  
373 -(((
374 -**Example:**  input：01 03 00 31 00 02 95 c4
375 -)))
293 +Example:input：01 03 00 31 00 02 95 c4
376 376  
377 -(((
378 - output：01 03 04 00 00 00 42 7A 02
379 -)))
295 +{{{ output:01 03 04 00 00 00 42 7A 02
296 +}}}
380 380  
381 381  [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
382 382  
... ... @@ -386,37 +386,21 @@
386 386  
387 387  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.
388 388  
389 -(((
390 -(((
391 391  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
392 -)))
393 -)))
394 394  
395 395  [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
396 396  
397 -**Example**:These two meters are examples of setting parameters and device addresses.
310 +Example:These two meters are examples of setting parameters and device addresses.
398 398  
399 -[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
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"]]
400 400  
401 -[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
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"]]
402 402  
403 -(((
404 -(((
405 405  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.
406 -)))
407 -)))
408 408  
409 -(((
410 -(((
411 411  We can use AT+CFGDEV to set the device address.
412 -)))
413 -)))
414 414  
415 -(((
416 -(((
417 417  We modify the device address 01 of the first energy meter to 02.
418 -)))
419 -)))
420 420  
421 421  [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
422 422  
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