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<
From version < 41.14 >
edited by Xiaoling
on 2022/06/01 14:12
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Summary

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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  (((
... ... @@ -100,102 +100,108 @@
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 -a: length for the return of AT+COMMAND
190 +a:  length for the return of AT+COMMAND
175 175  
176 -b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
192 +b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
177 177  
178 -c: define the position for valid value.
194 +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  
185 185  PAYLOAD is available after the valid value is intercepted.
186 186  
203 +[[image:image-20220601143046-7.png]]
187 187  
188 -[[image:image-20220527093059-11.png]]
205 +**AT COMMAND**
189 189  
190 -AT COMMAND
191 191  
192 -
193 193  You can get configured PAYLOAD on TTN.
194 194  
195 -[[image:image-20220527093133-12.png]]
210 +[[image:image-20220601143519-1.png]]
196 196  
197 197  (((
198 -AT COMMAND
213 +**AT COMMAND**
199 199  )))
200 200  
201 201  (((
... ... @@ -203,77 +203,76 @@
203 203  )))
204 204  
205 205  (((
206 -(% style="color:#4f81bd" %)**Example**:
221 +(% style="color:blue" %)**Example**:
207 207  
208 -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
209 209  )))
210 210  
211 211  (((
212 -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)
213 213  )))
214 214  
215 215  (((
216 -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.
217 217  
218 218  
219 219  )))
220 220  
221 221  (((
222 -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
223 223  )))
224 224  
225 225  (((
226 -RETURN2:01 03 02 08 DC BE 1D(return data)
241 +RETURN2: 01 03 02 08 DC BE 1D(return data)
227 227  )))
228 228  
229 229  (((
230 -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.
231 231  
232 232  
233 233  )))
234 234  
235 235  (((
236 -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
237 237  )))
238 238  
239 239  (((
240 -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)
241 241  )))
242 242  
243 243  (((
244 -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.
245 245  )))
246 246  
247 247  (((
248 -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
249 249  )))
250 250  
251 -[[image:image-20220527093204-13.png]]
266 +[[image:image-20220601142936-6.png]]
252 252  
253 253  AT COMMAND
254 254  
255 255  
256 -(% 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.**
257 257  
258 -[[image:image-20220527093251-14.png]]
259 259  
274 +[[image:image-20220601143642-2.png]]
275 +
260 260  AT COMMAND
261 261  
262 262  
263 263  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
264 264  
281 +
265 265  [[image:image-20220527093358-15.png]]
266 266  
267 267  (((
268 -DOWNLINK
285 +**DOWNLINK**
269 269  )))
270 270  
271 -(((
272 -
273 -)))
274 274  
275 275  (((
276 -(% style="color:#4f81bd" %)**Type Code 0xAF**
290 +(% style="color:blue" %)**Type Code 0xAF**
277 277  )))
278 278  
279 279  (((
... ... @@ -284,7 +284,7 @@
284 284  )))
285 285  
286 286  (((
287 -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.**
288 288  )))
289 289  
290 290  (((
... ... @@ -319,8 +319,9 @@
319 319  will execute an uplink after got this command.
320 320  )))
321 321  
336 +
322 322  (((
323 -(% style="color:#4f81bd" %)**Example:**
338 +(% style="color:blue" %)**Example:**
324 324  )))
325 325  
326 326  (((
... ... @@ -327,33 +327,34 @@
327 327  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
328 328  )))
329 329  
330 -[[image:image-20220527093430-16.png]]
345 +[[image:image-20220601144149-6.png]]
331 331  
332 -DOWNLINK
347 +**DOWNLINK**
333 333  
334 334  
335 -[[image:image-20220527093508-17.png]]
350 +[[image:image-20220601143803-3.png]]
336 336  
337 -DOWNLINK
352 +**DOWNLINK**
338 338  
339 339  
340 -[[image:image-20220527093530-18.png]]
355 +[[image:image-20220601144053-5.png]]
341 341  
342 -DOWNLINK
357 +**DOWNLINK**
343 343  
344 344  
345 -[[image:image-20220527093607-19.png]]
360 +[[image:image-20220601143921-4.png]]
346 346  
347 -DOWNLINK
362 +**DOWNLINK**
348 348  
349 349  
350 -[[image:image-20220527093628-20.png]]
365 +[[image:image-20220601142805-5.png]]
351 351  
352 -DOWNLINK
353 -
367 +**DOWNLINK**
354 354  
355 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
356 356  
370 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
371 +
372 +
357 357  (((
358 358  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.
359 359  )))
... ... @@ -376,33 +376,37 @@
376 376  
377 377  [[image:image-20220527093708-21.png]]
378 378  
379 -USB
395 +**USB**
380 380  
381 381  
382 382  [[image:image-20220527093747-22.png]]
383 383  
384 -USB
400 +**USB**
385 385  
386 386  
403 +
387 387  (((
388 388  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.
389 389  )))
390 390  
391 391  (((
392 -(% 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
393 393  )))
394 394  
395 395  (((
396 396   output：01 03 04 00 00 00 42 7A 02
414 +
415 +
397 397  )))
398 398  
399 399  [[image:image-20220527093821-23.png]]
400 400  
401 -USB
420 +**USB**
402 402  
403 403  
404 -=== **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 ===
405 405  
425 +
406 406  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.
407 407  
408 408  (((
... ... @@ -411,15 +411,18 @@
411 411  )))
412 412  )))
413 413  
414 -[[image:image-20220527093849-24.png]]
434 +[[image:image-20220601142044-1.png]]
415 415  
416 416  
417 -**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.
418 418  
439 +
419 419  [[image:image-20220527093950-25.png]]
420 420  
442 +
421 421  [[image:image-20220527094028-26.png]]
422 422  
445 +
423 423  (((
424 424  (((
425 425  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.
... ... @@ -428,7 +428,7 @@
428 428  
429 429  (((
430 430  (((
431 -We can use AT+CFGDEV to set the device address.
454 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
432 432  )))
433 433  )))
434 434  
... ... @@ -438,16 +438,17 @@
438 438  )))
439 439  )))
440 440  
441 -[[image:image-20220527094100-27.png]]
464 +[[image:image-20220601142354-2.png]]
442 442  
466 +
443 443  (% class="box infomessage" %)
444 444  (((
445 445  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
446 446  )))
447 447  
448 -* 01:device adaress
472 +* 01: device adaress
449 449  
450 -* 10:function code
474 +* 10: function code
451 451  
452 452  * 00 61：Register address
453 453  
... ... @@ -465,46 +465,77 @@
465 465  
466 466  Its default device address is 01, and the following are the parameters for configuring two energy meters.
467 467  
468 -[[image:image-20220527094150-28.png]]
492 +[[image:image-20220601142452-3.png]]
469 469  
470 470  
471 -[[image:image-20220527094224-29.png]]
495 +[[image:image-20220601142607-4.png]]
472 472  
473 -**PAYLOAD:01 08 DF 43 62**
474 474  
498 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
499 +
475 475  * 08 DF is the valid value of the meter with device address 02.
476 476  * 43 62 is the valid value of the meter with device address 01.
477 477  
503 +(% style="display:none" %) (%%)
478 478  
505 +
479 479  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
480 480  
481 -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:
482 482  
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 +
483 483  [[image:image-20220527094330-30.png]]
484 484  
485 -Connection
515 +**Connection**
486 486  
487 -* [[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
488 488  
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"]]
489 489  
520 +
521 +
490 490  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
491 491  
524 +
492 492  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-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
493 493  
494 -* [[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);"]]
495 495  
496 -* [[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"]]
497 497  
498 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
499 499  
532 +
533 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
534 +
535 +
500 500  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:
501 501  
502 -* [[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);"]]
503 503  
504 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
505 505  
541 +
542 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
543 +
544 +
506 506  [[image:image-20220527094556-31.png]]
507 507  
547 +
508 508  Network Structure
509 509  
510 510  * [[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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