Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 41.23 >
edited by Xiaoling
on 2022/06/01 14:17
To version < 62.2 >
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Summary

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Page properties
Content
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1 -(% class="wikigeneratedid" %)
2 - **Contents:**
1 +**Table of Contents:**
3 3  
4 4  {{toc/}}
5 5  
... ... @@ -8,60 +8,69 @@
8 8  
9 9  
10 10  
11 -= **1. Introduction** =
10 += 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 -== **1.1 Example 1: Connect to Leak relay and VFD** ==
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  
26 26  [[image:image-20220527091942-2.png]](% style="display:none" %)
27 27  
28 -Connection
29 +**Connection**
29 29  
30 30  
31 -Related documents:
32 +(% 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.
34 +* 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);"]]
35 +
36 +* 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 +
35 35  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
36 36  
37 37  
38 38  
39 -== **1.2 Example 2: Connect to Pulse Counter** ==
42 +== 1.2 Example 2: Connect to Pulse Counter ==
40 40  
44 +
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
48 +[[image:image-20220527092058-3.png||height="552" width="905"]]
46 46  
50 +**Connection**
47 47  
48 48  
49 -[[image:image-20220527092146-4.png]]
53 +[[image:image-20220527092146-4.png||height="507" width="906"]]
50 50  
51 -Connection
55 +**Connection**
52 52  
53 53  
54 -* [[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
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 +
55 55  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
56 56  
57 -== ==
58 58  
59 -== **1.3 Example3: Use RS485-LN with energy meters** ==
60 60  
61 -=== **1.3.1 OverView** ===
66 +== 1.3 Example 3: Use RS485-LN with energy meters ==
62 62  
68 +=== 1.3.1 OverView ===
69 +
70 +
63 63  (((
64 -**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
72 +(% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
65 65  )))
66 66  
67 67  (((
... ... @@ -70,12 +70,13 @@
70 70  
71 71  [[image:image-20220527092419-5.png]]
72 72  
73 -Connection1
81 +**Connection1**
74 74  
75 75  
76 -
77 77  (((
78 -How to connect with Energy Meter：
85 +(% style="color:blue" %)**How to connect with Energy Meter：**
86 +
87 +
79 79  )))
80 80  
81 81  (((
... ... @@ -87,11 +87,11 @@
87 87  )))
88 88  
89 89  (((
90 -Power Source VIN to RS485-LN VIN+
99 +Power Source **VIN** to RS485-LN **VIN+**
91 91  )))
92 92  
93 93  (((
94 -Power Source GND to RS485-LN VIN-
103 +Power Source **GND** to RS485-LN **VIN-**
95 95  )))
96 96  
97 97  (((
... ... @@ -100,75 +100,82 @@
100 100  
101 101  [[image:image-20220527092514-6.png]]
102 102  
103 -Connection2
112 +**Connection2**
104 104  
105 105  
106 -
107 107  [[image:image-20220527092555-7.png]]
108 108  
109 -Connection3
117 +**Connection3**
110 110  
111 111  
112 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
120 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
113 113  
122 +
114 114  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.
115 115  
116 -[[image:image-20220527092629-8.png]]
125 +[[image:image-20220601143257-10.png]]
117 117  
118 118  
119 -(% class="box infomessage" %)
120 -(((
121 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
122 -)))
128 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
123 123  
124 124  * The first byte : slave address code (=001～247)
131 +
125 125  * The second byte : read register value function code
133 +
126 126  * 3rd and 4th bytes: start address of register to be read
135 +
127 127  * 5th and 6th bytes: Number of registers to read
137 +
128 128  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
129 129  
130 130  (((
141 +
142 +
143 +
131 131  How to parse the reading of the return command of the parameter：
132 -)))
133 133  
134 -(% class="box infomessage" %)
135 -(((
136 -**Example:** RETURN1：01 03 02 08 FD 7E 05
146 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
137 137  )))
138 138  
139 139  * The first byte ARD: slave address code (=001～254)
150 +
140 140  * The second byte: Return to read function code
152 +
141 141  * 3rd byte: total number of bytes
154 +
142 142  * 4th～5th bytes: register data
156 +
143 143  * The 6th and 7th bytes: CRC16 checksum
158 +
144 144  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
145 145  
146 -(% class="wikigeneratedid" %)
147 -(((
148 -
149 -)))
150 150  
151 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
152 152  
163 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
164 +
165 +
153 153  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
154 154  
155 155  
156 -==== **1.3.3.1 via AT COMMAND:** ====
169 +==== **1.3.3.1 via AT COMMAND** ====
157 157  
158 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
159 159  
172 +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.
173 +
160 160  (((
161 161  If the configured parameters and commands are incorrect, the return value is not obtained.
176 +
177 +
162 162  )))
163 163  
164 -[[image:image-20220527092748-9.png]]
180 +[[image:image-20220601143201-9.png]]
165 165  
166 -AT COMMAND
182 +**AT COMMAND**
167 167  
168 168  
169 169  (% class="box infomessage" %)
170 170  (((
171 - AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
187 + (% _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
172 172  )))
173 173  
174 174  a:  length for the return of AT+COMMAND
... ... @@ -177,27 +177,24 @@
177 177  
178 178  c:  define the position for valid value.
179 179  
180 -[[image:image-20220527092936-10.png]]
196 +[[image:image-20220601143115-8.png]]
181 181  
182 -AT COMMAND
198 +**AT COMMAND**
183 183  
184 184  
185 -
186 186  PAYLOAD is available after the valid value is intercepted.
187 187  
203 +[[image:image-20220601143046-7.png]]
188 188  
189 -[[image:image-20220527093059-11.png]]
205 +**AT COMMAND**
190 190  
191 -AT COMMAND
192 192  
193 -
194 -
195 195  You can get configured PAYLOAD on TTN.
196 196  
197 -[[image:image-20220527093133-12.png]]
210 +[[image:image-20220601143519-1.png]]
198 198  
199 199  (((
200 -AT COMMAND
213 +**AT COMMAND**
201 201  )))
202 202  
203 203  (((
... ... @@ -205,79 +205,76 @@
205 205  )))
206 206  
207 207  (((
208 -(% style="color:#4f81bd" %)**Example**:
221 +(% style="color:blue" %)**Example**:
209 209  
210 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
223 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
211 211  )))
212 212  
213 213  (((
214 -RETURN1:01 03 02 00 02 39 85 00 00(return data)
227 +RETURN1: 01 03 02 00 02 39 85 00 00(return data)
215 215  )))
216 216  
217 217  (((
218 -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.
231 +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.
219 219  
220 220  
221 221  )))
222 222  
223 223  (((
224 -CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
237 +(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
225 225  )))
226 226  
227 227  (((
228 -RETURN2:01 03 02 08 DC BE 1D(return data)
241 +RETURN2: 01 03 02 08 DC BE 1D(return data)
229 229  )))
230 230  
231 231  (((
232 -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.
245 +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.
233 233  
234 234  
235 235  )))
236 236  
237 237  (((
238 -CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
251 +(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
239 239  )))
240 240  
241 241  (((
242 -RETURN3:01 03 04 00 00 00 44 FA 00(return data)
255 +RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
243 243  )))
244 244  
245 245  (((
246 -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.
259 +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.
247 247  )))
248 248  
249 249  (((
250 -Payload:01 00 02 39 85 08 DC 00 00 00 44
263 +Payload: 01 00 02 39 85 08 DC 00 00 00 44
251 251  )))
252 252  
253 -[[image:image-20220527093204-13.png]]
266 +[[image:image-20220601142936-6.png]]
254 254  
255 255  AT COMMAND
256 256  
257 257  
258 -(% 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.**
271 +(% 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.**
259 259  
260 260  
274 +[[image:image-20220601143642-2.png]]
261 261  
262 -[[image:image-20220527093251-14.png]]
263 -
264 264  AT COMMAND
265 265  
266 266  
267 267  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
268 268  
281 +
269 269  [[image:image-20220527093358-15.png]]
270 270  
271 271  (((
272 -DOWNLINK
285 +**DOWNLINK**
273 273  )))
274 274  
275 -(((
276 -
277 -)))
278 278  
279 279  (((
280 -(% style="color:#4f81bd" %)**Type Code 0xAF**
290 +(% style="color:blue" %)**Type Code 0xAF**
281 281  )))
282 282  
283 283  (((
... ... @@ -288,7 +288,7 @@
288 288  )))
289 289  
290 290  (((
291 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
301 +(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
292 292  )))
293 293  
294 294  (((
... ... @@ -323,10 +323,9 @@
323 323  will execute an uplink after got this command.
324 324  )))
325 325  
326 -(((
327 -
328 328  
329 -(% style="color:#4f81bd" %)**Example:**
337 +(((
338 +(% style="color:blue" %)**Example:**
330 330  )))
331 331  
332 332  (((
... ... @@ -333,37 +333,34 @@
333 333  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
334 334  )))
335 335  
336 -[[image:image-20220527093430-16.png]]
345 +[[image:image-20220601144149-6.png]]
337 337  
338 -DOWNLINK
347 +**DOWNLINK**
339 339  
340 340  
350 +[[image:image-20220601143803-3.png]]
341 341  
342 -[[image:image-20220527093508-17.png]]
352 +**DOWNLINK**
343 343  
344 -DOWNLINK
345 345  
355 +[[image:image-20220601144053-5.png]]
346 346  
357 +**DOWNLINK**
347 347  
348 -[[image:image-20220527093530-18.png]]
349 349  
350 -DOWNLINK
360 +[[image:image-20220601143921-4.png]]
351 351  
362 +**DOWNLINK**
352 352  
353 353  
354 -[[image:image-20220527093607-19.png]]
365 +[[image:image-20220601142805-5.png]]
355 355  
356 -DOWNLINK
367 +**DOWNLINK**
357 357  
358 358  
370 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
359 359  
360 -[[image:image-20220527093628-20.png]]
361 361  
362 -DOWNLINK
363 -
364 -
365 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
366 -
367 367  (((
368 368  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.
369 369  )))
... ... @@ -386,34 +386,37 @@
386 386  
387 387  [[image:image-20220527093708-21.png]]
388 388  
389 -USB
395 +**USB**
390 390  
391 391  
392 -
393 393  [[image:image-20220527093747-22.png]]
394 394  
395 -USB
400 +**USB**
396 396  
397 397  
403 +
398 398  (((
399 399  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.
400 400  )))
401 401  
402 402  (((
403 -(% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
409 +(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
404 404  )))
405 405  
406 406  (((
407 407   output：01 03 04 00 00 00 42 7A 02
414 +
415 +
408 408  )))
409 409  
410 410  [[image:image-20220527093821-23.png]]
411 411  
412 -USB
420 +**USB**
413 413  
414 414  
415 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
423 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
416 416  
425 +
417 417  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.
418 418  
419 419  (((
... ... @@ -422,15 +422,18 @@
422 422  )))
423 423  )))
424 424  
425 -[[image:image-20220527093849-24.png]]
434 +[[image:image-20220601142044-1.png]]
426 426  
427 427  
428 -**Example**:These two meters are examples of setting parameters and device addresses.
437 +(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
429 429  
439 +
430 430  [[image:image-20220527093950-25.png]]
431 431  
442 +
432 432  [[image:image-20220527094028-26.png]]
433 433  
445 +
434 434  (((
435 435  (((
436 436  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.
... ... @@ -439,7 +439,7 @@
439 439  
440 440  (((
441 441  (((
442 -We can use AT+CFGDEV to set the device address.
454 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
443 443  )))
444 444  )))
445 445  
... ... @@ -449,16 +449,17 @@
449 449  )))
450 450  )))
451 451  
452 -[[image:image-20220527094100-27.png]]
464 +[[image:image-20220601142354-2.png]]
453 453  
466 +
454 454  (% class="box infomessage" %)
455 455  (((
456 456  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
457 457  )))
458 458  
459 -* 01:device adaress
472 +* 01: device adaress
460 460  
461 -* 10:function code
474 +* 10: function code
462 462  
463 463  * 00 61：Register address
464 464  
... ... @@ -476,46 +476,77 @@
476 476  
477 477  Its default device address is 01, and the following are the parameters for configuring two energy meters.
478 478  
479 -[[image:image-20220527094150-28.png]]
492 +[[image:image-20220601142452-3.png]]
480 480  
481 481  
482 -[[image:image-20220527094224-29.png]]
495 +[[image:image-20220601142607-4.png]]
483 483  
484 -**PAYLOAD:01 08 DF 43 62**
485 485  
498 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
499 +
486 486  * 08 DF is the valid value of the meter with device address 02.
487 487  * 43 62 is the valid value of the meter with device address 01.
488 488  
503 +(% style="display:none" %) (%%)
489 489  
505 +
490 490  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
491 491  
492 -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:
493 493  
509 +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.
510 +
511 +The structure is like below:
512 +
494 494  [[image:image-20220527094330-30.png]]
495 495  
496 -Connection
515 +**Connection**
497 497  
498 -* [[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
499 499  
518 +* 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"]]
500 500  
520 +
521 +
501 501  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
502 502  
524 +
503 503  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:
504 504  
505 -* [[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
527 +* 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);"]]
506 506  
507 -* [[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
529 +* 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"]]
508 508  
509 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
510 510  
532 +
533 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
534 +
535 +
511 511  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:
512 512  
513 -* [[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
538 +* 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);"]]
514 514  
515 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
516 516  
541 +
542 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
543 +
544 +
517 517  [[image:image-20220527094556-31.png]]
518 518  
547 +
519 519  Network Structure
520 520  
521 521  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
551 +
552 +
553 +
554 +== 1.8 Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. ==
555 +
556 +
557 +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.
558 +
559 +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.
560 +
561 +This is released the code under GNU LGPL licence on Github:
562 +
563 +[[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]]
564 +
565 +
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