Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 41.6 >
edited by Xiaoling
on 2022/05/30 11:26
To version < 62.1 >
edited by Bei Jinggeng
on 2023/08/08 15:23
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Summary

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Page properties
Author
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1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
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1 -(% class="wikigeneratedid" %)
2 - **Contents:**
1 +**Table of Contents:**
3 3  
4 4  {{toc/}}
5 5  
... ... @@ -10,69 +10,83 @@
10 10  
11 11  = 1. Introduction =
12 12  
12 +
13 13  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14 14  
15 15  
16 16  == 1.1 Example 1: Connect to Leak relay and VFD ==
17 17  
18 +
18 18  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:
19 19  
20 -[[image:image-20220527091852-1.png]]
21 21  
22 -Connection
22 +[[image:image-20220527091852-1.png||height="547" width="994"]]
23 23  
24 +**Connection**
24 24  
25 25  
27 +
26 26  [[image:image-20220527091942-2.png]](% style="display:none" %)
27 27  
28 -Connection
30 +**Connection**
29 29  
30 30  
31 -Related documents:
33 +(% style="color:blue" %)**Related documents:**
32 32  
33 -* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
34 -* [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
35 -* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
35 +* System Structure:  [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
36 36  
37 +* Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code:  [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
37 37  
39 +* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
38 38  
39 39  == 1.2 Example 2: Connect to Pulse Counter ==
40 40  
43 +
41 41  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:
42 42  
43 -[[image:image-20220527092058-3.png]]
44 44  
45 -Connection
47 +[[image:image-20220527092058-3.png||height="552" width="905"]]
46 46  
49 +**Connection**
47 47  
48 -[[image:image-20220527092146-4.png]]
49 49  
50 -Connection
51 51  
52 -* [[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
53 -* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
53 +[[image:image-20220527092146-4.png||height="507" width="906"]]
54 54  
55 -== ==
55 +**Connection**
56 56  
57 -== 1.3 Example3: Use RS485-LN with energy meters ==
58 58  
58 +(% style="color:blue" %)**Related documents:**
59 +
60 +* Configure Document:  [[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/||_mstmutation="1"]]
61 +
62 +* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
63 +
64 +== 1.3 Example 3: Use RS485-LN with energy meters ==
65 +
59 59  === 1.3.1 OverView ===
60 60  
68 +
61 61  (((
62 -**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
70 +(% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
63 63  )))
64 64  
65 65  (((
66 66  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
75 +
76 +
67 67  )))
68 68  
69 69  [[image:image-20220527092419-5.png]]
70 70  
71 -Connection1
81 +**Connection1**
72 72  
73 73  
84 +
74 74  (((
75 -How to connect with Energy Meter：
86 +(% style="color:blue" %)**How to connect with Energy Meter：**
87 +
88 +
76 76  )))
77 77  
78 78  (((
... ... @@ -84,114 +84,124 @@
84 84  )))
85 85  
86 86  (((
87 -Power Source VIN to RS485-LN VIN+
100 +Power Source **VIN** to RS485-LN **VIN+**
88 88  )))
89 89  
90 90  (((
91 -Power Source GND to RS485-LN VIN-
104 +Power Source **GND** to RS485-LN **VIN-**
92 92  )))
93 93  
94 94  (((
95 95  Once there is power, the RS485-LN will be on.
109 +
110 +
96 96  )))
97 97  
98 98  [[image:image-20220527092514-6.png]]
99 99  
100 -Connection2
115 +**Connection2**
101 101  
102 102  
118 +
103 103  [[image:image-20220527092555-7.png]]
104 104  
105 -Connection3
121 +**Connection3**
106 106  
107 107  
108 108  === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
109 109  
126 +
110 110  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.
111 111  
112 -[[image:image-20220527092629-8.png]]
129 +[[image:image-20220601143257-10.png]]
113 113  
114 114  
115 -(% class="box infomessage" %)
116 -(((
117 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
118 -)))
132 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
119 119  
120 120  * The first byte : slave address code (=001～247)
135 +
121 121  * The second byte : read register value function code
137 +
122 122  * 3rd and 4th bytes: start address of register to be read
139 +
123 123  * 5th and 6th bytes: Number of registers to read
141 +
124 124  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
125 125  
126 126  (((
145 +
146 +
147 +
127 127  How to parse the reading of the return command of the parameter：
128 -)))
129 129  
130 -(% class="box infomessage" %)
131 -(((
132 -**Example:** RETURN1：01 03 02 08 FD 7E 05
150 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
133 133  )))
134 134  
135 135  * The first byte ARD: slave address code (=001～254)
154 +
136 136  * The second byte: Return to read function code
156 +
137 137  * 3rd byte: total number of bytes
158 +
138 138  * 4th～5th bytes: register data
160 +
139 139  * The 6th and 7th bytes: CRC16 checksum
162 +
140 140  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
141 141  
142 -(% class="wikigeneratedid" %)
143 -(((
144 -
145 -)))
165 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
146 146  
147 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
148 148  
149 149  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
150 150  
151 151  
152 -==== **1.3.3.1 via AT COMMAND:** ====
171 +==== **1.3.3.1 via AT COMMAND** ====
153 153  
154 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
155 155  
174 +First, we can use (% style="color:blue" %)**AT+CFGDEV**(%%) to get the return value, and we can also judge whether the input parameters are correct.
175 +
156 156  (((
157 157  If the configured parameters and commands are incorrect, the return value is not obtained.
178 +
179 +
158 158  )))
159 159  
160 -[[image:image-20220527092748-9.png]]
182 +[[image:image-20220601143201-9.png]]
161 161  
162 -AT COMMAND
184 +**AT COMMAND**
163 163  
164 164  
165 165  (% class="box infomessage" %)
166 166  (((
167 - AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
189 + (% _mstmutation="1" %)**AT+DATACUTx **(%%):  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
168 168  )))
169 169  
170 -a: length for the return of AT+COMMAND
192 +a:  length for the return of AT+COMMAND
171 171  
172 -b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
194 +b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
173 173  
174 -c: define the position for valid value.
196 +c:  define the position for valid value.
175 175  
176 -[[image:image-20220527092936-10.png]]
198 +[[image:image-20220601143115-8.png]]
177 177  
178 -AT COMMAND
200 +**AT COMMAND**
179 179  
180 180  
203 +
181 181  PAYLOAD is available after the valid value is intercepted.
182 182  
206 +[[image:image-20220601143046-7.png]]
183 183  
184 -[[image:image-20220527093059-11.png]]
208 +**AT COMMAND**
185 185  
186 -AT COMMAND
187 187  
188 188  
189 189  You can get configured PAYLOAD on TTN.
190 190  
191 -[[image:image-20220527093133-12.png]]
214 +[[image:image-20220601143519-1.png]]
192 192  
193 193  (((
194 -AT COMMAND
217 +**AT COMMAND**
195 195  )))
196 196  
197 197  (((
... ... @@ -199,77 +199,79 @@
199 199  )))
200 200  
201 201  (((
202 -(% style="color:#4f81bd" %)**Example**:
225 +(% style="color:blue" %)**Example**:
203 203  
204 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
227 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
205 205  )))
206 206  
207 207  (((
208 -RETURN1:01 03 02 00 02 39 85 00 00(return data)
231 +RETURN1: 01 03 02 00 02 39 85 00 00(return data)
209 209  )))
210 210  
211 211  (((
212 -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.
235 +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.
213 213  
214 214  
215 215  )))
216 216  
217 217  (((
218 -CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
241 +(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
219 219  )))
220 220  
221 221  (((
222 -RETURN2:01 03 02 08 DC BE 1D(return data)
245 +RETURN2: 01 03 02 08 DC BE 1D(return data)
223 223  )))
224 224  
225 225  (((
226 -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.
249 +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.
227 227  
228 228  
229 229  )))
230 230  
231 231  (((
232 -CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
255 +(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
233 233  )))
234 234  
235 235  (((
236 -RETURN3:01 03 04 00 00 00 44 FA 00(return data)
259 +RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
237 237  )))
238 238  
239 239  (((
240 -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.
263 +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.
241 241  )))
242 242  
243 243  (((
244 -Payload:01 00 02 39 85 08 DC 00 00 00 44
267 +Payload: 01 00 02 39 85 08 DC 00 00 00 44
245 245  )))
246 246  
247 -[[image:image-20220527093204-13.png]]
270 +[[image:image-20220601142936-6.png]]
248 248  
249 249  AT COMMAND
250 250  
251 251  
252 -(% 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.**
253 253  
254 -[[image:image-20220527093251-14.png]]
276 +(% style="color:blue" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
255 255  
278 +
279 +[[image:image-20220601143642-2.png]]
280 +
256 256  AT COMMAND
257 257  
258 258  
284 +
259 259  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
260 260  
287 +
261 261  [[image:image-20220527093358-15.png]]
262 262  
263 263  (((
264 -DOWNLINK
291 +**DOWNLINK**
265 265  )))
266 266  
267 -(((
268 -
269 -)))
270 270  
295 +
271 271  (((
272 -(% style="color:#4f81bd" %)**Type Code 0xAF**
297 +(% style="color:blue" %)**Type Code 0xAF**
273 273  )))
274 274  
275 275  (((
... ... @@ -280,7 +280,7 @@
280 280  )))
281 281  
282 282  (((
283 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
308 +(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
284 284  )))
285 285  
286 286  (((
... ... @@ -315,8 +315,9 @@
315 315  will execute an uplink after got this command.
316 316  )))
317 317  
343 +
318 318  (((
319 -(% style="color:#4f81bd" %)**Example:**
345 +(% style="color:blue" %)**Example:**
320 320  )))
321 321  
322 322  (((
... ... @@ -323,33 +323,38 @@
323 323  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
324 324  )))
325 325  
326 -[[image:image-20220527093430-16.png]]
352 +[[image:image-20220601144149-6.png]]
327 327  
328 -DOWNLINK
354 +**DOWNLINK**
329 329  
330 330  
331 -[[image:image-20220527093508-17.png]]
332 332  
333 -DOWNLINK
358 +[[image:image-20220601143803-3.png]]
334 334  
360 +**DOWNLINK**
335 335  
336 -[[image:image-20220527093530-18.png]]
337 337  
338 -DOWNLINK
339 339  
364 +[[image:image-20220601144053-5.png]]
340 340  
341 -[[image:image-20220527093607-19.png]]
366 +**DOWNLINK**
342 342  
343 -DOWNLINK
344 344  
345 345  
346 -[[image:image-20220527093628-20.png]]
370 +[[image:image-20220601143921-4.png]]
347 347  
348 -DOWNLINK
349 -
372 +**DOWNLINK**
350 350  
351 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
352 352  
375 +
376 +[[image:image-20220601142805-5.png]]
377 +
378 +**DOWNLINK**
379 +
380 +
381 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
382 +
383 +
353 353  (((
354 354  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.
355 355  )))
... ... @@ -368,37 +368,45 @@
368 368  
369 369  (((
370 370  check digit: Even
402 +
403 +
371 371  )))
372 372  
373 373  [[image:image-20220527093708-21.png]]
374 374  
375 -USB
408 +**USB**
376 376  
377 377  
411 +
378 378  [[image:image-20220527093747-22.png]]
379 379  
380 -USB
414 +**USB**
381 381  
382 382  
417 +
383 383  (((
384 384  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.
385 385  )))
386 386  
387 387  (((
388 -(% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
423 +(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
389 389  )))
390 390  
391 391  (((
392 392   output：01 03 04 00 00 00 42 7A 02
428 +
429 +
393 393  )))
394 394  
395 395  [[image:image-20220527093821-23.png]]
396 396  
397 -USB
434 +**USB**
398 398  
399 399  
400 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
401 401  
438 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
439 +
440 +
402 402  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.
403 403  
404 404  (((
... ... @@ -407,15 +407,18 @@
407 407  )))
408 408  )))
409 409  
410 -[[image:image-20220527093849-24.png]]
449 +[[image:image-20220601142044-1.png]]
411 411  
412 412  
413 -**Example**:These two meters are examples of setting parameters and device addresses.
452 +(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
414 414  
454 +
415 415  [[image:image-20220527093950-25.png]]
416 416  
457 +
417 417  [[image:image-20220527094028-26.png]]
418 418  
460 +
419 419  (((
420 420  (((
421 421  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.
... ... @@ -424,7 +424,7 @@
424 424  
425 425  (((
426 426  (((
427 -We can use AT+CFGDEV to set the device address.
469 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
428 428  )))
429 429  )))
430 430  
... ... @@ -434,16 +434,17 @@
434 434  )))
435 435  )))
436 436  
437 -[[image:image-20220527094100-27.png]]
479 +[[image:image-20220601142354-2.png]]
438 438  
481 +
439 439  (% class="box infomessage" %)
440 440  (((
441 441  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
442 442  )))
443 443  
444 -* 01:device adaress
487 +* 01: device adaress
445 445  
446 -* 10:function code
489 +* 10: function code
447 447  
448 448  * 00 61：Register address
449 449  
... ... @@ -461,48 +461,68 @@
461 461  
462 462  Its default device address is 01, and the following are the parameters for configuring two energy meters.
463 463  
464 -[[image:image-20220527094150-28.png]]
507 +[[image:image-20220601142452-3.png]]
465 465  
466 466  
467 -[[image:image-20220527094224-29.png]]
510 +[[image:image-20220601142607-4.png]]
468 468  
469 -**PAYLOAD:01 08 DF 43 62**
470 470  
513 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
514 +
471 471  * 08 DF is the valid value of the meter with device address 02.
472 472  * 43 62 is the valid value of the meter with device address 01.
473 473  
518 +(% style="display:none" %) (%%)
474 474  
520 +
475 475  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
476 476  
477 -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 SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
478 478  
524 +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 SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology.
525 +
526 +The structure is like below:
527 +
479 479  [[image:image-20220527094330-30.png]]
480 480  
481 -Connection
530 +**Connection**
482 482  
483 -* [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
484 484  
533 +* Configure Documen:  [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/||_mstmutation="1"]]
485 485  
486 486  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
487 487  
537 +
488 488  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-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
489 489  
490 -* [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf]] : Configure Document For RS485-BL
540 +* Configure Document For RS485-BL:  [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
491 491  
492 -* [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf]] : Configure Document for RS485-LN
542 +* Configure Document for RS485-LN:  [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf||_mstmutation="1"]]
493 493  
544 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
494 494  
495 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
496 496  
497 497  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 CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
498 498  
499 -* [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf]] : Configure Document For RS485-LN
549 +* Configure Document For RS485-LN:  [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
500 500  
551 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
501 501  
502 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
503 503  
504 504  [[image:image-20220527094556-31.png]]
505 505  
556 +
506 506  Network Structure
507 507  
508 508  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
560 +
561 +== 1.8  Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. ==
562 +
563 +This sketch uses 4 registers: some of them can be set by Dragino with a command, another is used to store value from a DS18B20 temperature sensor, or a random generated number. All data is 16bit uint, but the sketch shows also how to represent booleans and negative numbers.
564 +
565 +In the next days I will be adding more documentation, but I think it already explains users how to build their own modbus sensor to pair with Dragino RS485-BL.
566 +
567 +This is released the code under GNU LGPL licence on Github:
568 +
569 +[[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]]
570 +
571 +
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