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Summary

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1 +(% class="wikigeneratedid" %)
2 + **Contents:**
3 +
4 +{{toc/}}
5 +
1 1  = 1. Introduction =
2 2  
3 3  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
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10 10  
11 11  Connection
12 12  
18 +
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" %)
14 14  
15 15  Connection
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28 28  
29 29  Connection
30 30  
37 +
31 31  [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
32 32  
33 33  Connection
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51 51  
52 52  Connection1
53 53  
61 +(((
54 54  How to connect with Energy Meter：
63 +)))
55 55  
65 +(((
56 56  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.
67 +)))
57 57  
69 +(((
58 58  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
71 +)))
59 59  
73 +(((
60 60  Power Source VIN to RS485-LN VIN+
75 +)))
61 61  
77 +(((
62 62  Power Source GND to RS485-LN VIN-
79 +)))
63 63  
81 +(((
64 64  Once there is power, the RS485-LN will be on.
83 +)))
65 65  
66 66  [[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
67 67  
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68 68  Connection2
69 69  
70 70  
71 -[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="763" width="573"]]
90 +[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
72 72  
73 73  Connection3
74 74  
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124 124  
125 125  (% class="box infomessage" %)
126 126  (((
127 -AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
146 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
128 128  )))
129 129  
130 130  a: length for the return of AT+COMMAND
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211 211  
212 212  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
213 213  
214 -[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
233 +[[image:image-20220512104358-3.png]]
215 215  
216 216  (((
217 217  DOWNLINK
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222 222  )))
223 223  
224 224  (((
225 -Type Code 0xAF
244 +**Type Code 0xAF**
226 226  )))
227 227  
228 228  (((
248 +(% class="box infomessage" %)
249 +(((
229 229  0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
230 230  )))
252 +)))
231 231  
232 232  (((
233 233  Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
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292 292  
293 293  DOWNLINK
294 294  
317 +
295 295  [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
296 296  
297 297  DOWNLINK
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319 319  check digit: Even
320 320  )))
321 321  
322 -[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
345 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
323 323  
324 324  USB
325 325  
326 326  
327 -[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
350 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
328 328  
329 329  USB
330 330  
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338 338  )))
339 339  
340 340  (((
341 - output:01 03 04 00 00 00 42 7A 02
364 + output：01 03 04 00 00 00 42 7A 02
342 342  )))
343 343  
344 344  [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
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350 350  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.
351 351  
352 352  (((
376 +(((
353 353  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
354 354  )))
379 +)))
355 355  
356 356  [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
357 357  
358 -Example:These two meters are examples of setting parameters and device addresses.
383 +**Example**:These two meters are examples of setting parameters and device addresses.
359 359  
360 -[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
385 +[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
361 361  
362 362  [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
363 363  
364 364  (((
390 +(((
365 365  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.
366 366  )))
393 +)))
367 367  
368 368  (((
396 +(((
369 369  We can use AT+CFGDEV to set the device address.
370 370  )))
399 +)))
371 371  
372 372  (((
402 +(((
373 373  We modify the device address 01 of the first energy meter to 02.
374 374  )))
405 +)))
375 375  
376 376  [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
377 377  
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