Last modified by Karry Zhuang on 2024/07/11 11:58
<
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edited by Xiaoling
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Author
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1 -XWiki.Xiaoling
1 +XWiki.karry
Content
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1 -(% class="wikigeneratedid" %)
2 - **Contents:**
1 +**Table of Contents:**
3 3  
4 4  {{toc/}}
5 5  
... ... @@ -8,60 +8,67 @@
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  
41 +== 1.2 Example 2: Connect to Pulse Counter ==
38 38  
39 -== **1.2 Example 2: Connect to Pulse Counter** ==
40 40  
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 48  
49 -[[image:image-20220527092146-4.png]]
52 +[[image:image-20220527092146-4.png||height="507" width="906"]]
50 50  
51 -Connection
54 +**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
57 +(% style="color:blue" %)**Related documents:**
58 +
59 +* 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"]]
60 +
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** ==
64 +== 1.3 Example 3: Use RS485-LN with energy meters ==
60 60  
61 -=== **1.3.1 OverView** ===
66 +=== 1.3.1 OverView ===
62 62  
68 +
63 63  (((
64 -**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.**
65 65  )))
66 66  
67 67  (((
... ... @@ -70,11 +70,13 @@
70 70  
71 71  [[image:image-20220527092419-5.png]]
72 72  
73 -Connection1
79 +**Connection1**
74 74  
75 75  
76 76  (((
77 -How to connect with Energy Meter：
83 +(% style="color:blue" %)**How to connect with Energy Meter：**
84 +
85 +
78 78  )))
79 79  
80 80  (((
... ... @@ -86,11 +86,11 @@
86 86  )))
87 87  
88 88  (((
89 -Power Source VIN to RS485-LN VIN+
97 +Power Source **VIN** to RS485-LN **VIN+**
90 90  )))
91 91  
92 92  (((
93 -Power Source GND to RS485-LN VIN-
101 +Power Source **GND** to RS485-LN **VIN-**
94 94  )))
95 95  
96 96  (((
... ... @@ -99,101 +99,107 @@
99 99  
100 100  [[image:image-20220527092514-6.png]]
101 101  
102 -Connection2
110 +**Connection2**
103 103  
104 104  
105 105  [[image:image-20220527092555-7.png]]
106 106  
107 -Connection3
115 +**Connection3**
108 108  
109 109  
110 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
118 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
111 111  
120 +
112 112  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.
113 113  
114 -[[image:image-20220527092629-8.png]]
123 +[[image:image-20220601143257-10.png]]
115 115  
116 116  
117 -(% class="box infomessage" %)
118 -(((
119 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
120 -)))
126 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
121 121  
122 122  * The first byte : slave address code (=001～247)
129 +
123 123  * The second byte : read register value function code
131 +
124 124  * 3rd and 4th bytes: start address of register to be read
133 +
125 125  * 5th and 6th bytes: Number of registers to read
135 +
126 126  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
127 127  
128 128  (((
139 +
140 +
141 +
129 129  How to parse the reading of the return command of the parameter：
130 -)))
131 131  
132 -(% class="box infomessage" %)
133 -(((
134 -**Example:** RETURN1：01 03 02 08 FD 7E 05
144 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
135 135  )))
136 136  
137 137  * The first byte ARD: slave address code (=001～254)
148 +
138 138  * The second byte: Return to read function code
150 +
139 139  * 3rd byte: total number of bytes
152 +
140 140  * 4th～5th bytes: register data
154 +
141 141  * The 6th and 7th bytes: CRC16 checksum
156 +
142 142  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
143 143  
144 -(% class="wikigeneratedid" %)
145 -(((
146 -
147 -)))
148 148  
149 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
160 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
150 150  
162 +
151 151  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
152 152  
153 153  
154 -==== **1.3.3.1 via AT COMMAND:** ====
166 +==== **1.3.3.1 via AT COMMAND** ====
155 155  
156 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
157 157  
169 +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.
170 +
158 158  (((
159 159  If the configured parameters and commands are incorrect, the return value is not obtained.
173 +
174 +
160 160  )))
161 161  
162 -[[image:image-20220527092748-9.png]]
177 +[[image:image-20220601143201-9.png]]
163 163  
164 -AT COMMAND
179 +**AT COMMAND**
165 165  
166 166  
167 167  (% class="box infomessage" %)
168 168  (((
169 - AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
184 + (% _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
170 170  )))
171 171  
172 -a: length for the return of AT+COMMAND
187 +a:  length for the return of AT+COMMAND
173 173  
174 -b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
189 +b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
175 175  
176 -c: define the position for valid value.
191 +c:  define the position for valid value.
177 177  
178 -[[image:image-20220527092936-10.png]]
193 +[[image:image-20220601143115-8.png]]
179 179  
180 -AT COMMAND
195 +**AT COMMAND**
181 181  
182 182  
183 183  PAYLOAD is available after the valid value is intercepted.
184 184  
200 +[[image:image-20220601143046-7.png]]
185 185  
186 -[[image:image-20220527093059-11.png]]
202 +**AT COMMAND**
187 187  
188 -AT COMMAND
189 189  
190 -
191 191  You can get configured PAYLOAD on TTN.
192 192  
193 -[[image:image-20220527093133-12.png]]
207 +[[image:image-20220601143519-1.png]]
194 194  
195 195  (((
196 -AT COMMAND
210 +**AT COMMAND**
197 197  )))
198 198  
199 199  (((
... ... @@ -201,77 +201,76 @@
201 201  )))
202 202  
203 203  (((
204 -(% style="color:#4f81bd" %)**Example**:
218 +(% style="color:blue" %)**Example**:
205 205  
206 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
220 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
207 207  )))
208 208  
209 209  (((
210 -RETURN1:01 03 02 00 02 39 85 00 00(return data)
224 +RETURN1: 01 03 02 00 02 39 85 00 00(return data)
211 211  )))
212 212  
213 213  (((
214 -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.
228 +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.
215 215  
216 216  
217 217  )))
218 218  
219 219  (((
220 -CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
234 +(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
221 221  )))
222 222  
223 223  (((
224 -RETURN2:01 03 02 08 DC BE 1D(return data)
238 +RETURN2: 01 03 02 08 DC BE 1D(return data)
225 225  )))
226 226  
227 227  (((
228 -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.
242 +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.
229 229  
230 230  
231 231  )))
232 232  
233 233  (((
234 -CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
248 +(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
235 235  )))
236 236  
237 237  (((
238 -RETURN3:01 03 04 00 00 00 44 FA 00(return data)
252 +RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
239 239  )))
240 240  
241 241  (((
242 -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.
256 +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.
243 243  )))
244 244  
245 245  (((
246 -Payload:01 00 02 39 85 08 DC 00 00 00 44
260 +Payload: 01 00 02 39 85 08 DC 00 00 00 44
247 247  )))
248 248  
249 -[[image:image-20220527093204-13.png]]
263 +[[image:image-20220601142936-6.png]]
250 250  
251 251  AT COMMAND
252 252  
253 253  
254 -(% 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.**
268 +(% 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  
256 -[[image:image-20220527093251-14.png]]
257 257  
271 +[[image:image-20220601143642-2.png]]
272 +
258 258  AT COMMAND
259 259  
260 260  
261 261  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
262 262  
278 +
263 263  [[image:image-20220527093358-15.png]]
264 264  
265 265  (((
266 -DOWNLINK
282 +**DOWNLINK**
267 267  )))
268 268  
269 -(((
270 -
271 -)))
272 272  
273 273  (((
274 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
275 275  )))
276 276  
277 277  (((
... ... @@ -282,7 +282,7 @@
282 282  )))
283 283  
284 284  (((
285 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
298 +(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
286 286  )))
287 287  
288 288  (((
... ... @@ -317,8 +317,9 @@
317 317  will execute an uplink after got this command.
318 318  )))
319 319  
333 +
320 320  (((
321 -(% style="color:#4f81bd" %)**Example:**
335 +(% style="color:blue" %)**Example:**
322 322  )))
323 323  
324 324  (((
... ... @@ -325,33 +325,34 @@
325 325  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
326 326  )))
327 327  
328 -[[image:image-20220527093430-16.png]]
342 +[[image:image-20220601144149-6.png]]
329 329  
330 -DOWNLINK
344 +**DOWNLINK**
331 331  
332 332  
333 -[[image:image-20220527093508-17.png]]
347 +[[image:image-20220601143803-3.png]]
334 334  
335 -DOWNLINK
349 +**DOWNLINK**
336 336  
337 337  
338 -[[image:image-20220527093530-18.png]]
352 +[[image:image-20220601144053-5.png]]
339 339  
340 -DOWNLINK
354 +**DOWNLINK**
341 341  
342 342  
343 -[[image:image-20220527093607-19.png]]
357 +[[image:image-20220601143921-4.png]]
344 344  
345 -DOWNLINK
359 +**DOWNLINK**
346 346  
347 347  
348 -[[image:image-20220527093628-20.png]]
362 +[[image:image-20220601142805-5.png]]
349 349  
350 -DOWNLINK
351 -
364 +**DOWNLINK**
352 352  
353 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
354 354  
367 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
368 +
369 +
355 355  (((
356 356  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.
357 357  )))
... ... @@ -374,33 +374,37 @@
374 374  
375 375  [[image:image-20220527093708-21.png]]
376 376  
377 -USB
392 +**USB**
378 378  
379 379  
380 380  [[image:image-20220527093747-22.png]]
381 381  
382 -USB
397 +**USB**
383 383  
384 384  
400 +
385 385  (((
386 386  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.
387 387  )))
388 388  
389 389  (((
390 -(% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
406 +(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
391 391  )))
392 392  
393 393  (((
394 394   output：01 03 04 00 00 00 42 7A 02
411 +
412 +
395 395  )))
396 396  
397 397  [[image:image-20220527093821-23.png]]
398 398  
399 -USB
417 +**USB**
400 400  
401 401  
402 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
420 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
403 403  
422 +
404 404  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.
405 405  
406 406  (((
... ... @@ -409,15 +409,18 @@
409 409  )))
410 410  )))
411 411  
412 -[[image:image-20220527093849-24.png]]
431 +[[image:image-20220601142044-1.png]]
413 413  
414 414  
415 -**Example**:These two meters are examples of setting parameters and device addresses.
434 +(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
416 416  
436 +
417 417  [[image:image-20220527093950-25.png]]
418 418  
439 +
419 419  [[image:image-20220527094028-26.png]]
420 420  
442 +
421 421  (((
422 422  (((
423 423  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.
... ... @@ -426,7 +426,7 @@
426 426  
427 427  (((
428 428  (((
429 -We can use AT+CFGDEV to set the device address.
451 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
430 430  )))
431 431  )))
432 432  
... ... @@ -436,16 +436,17 @@
436 436  )))
437 437  )))
438 438  
439 -[[image:image-20220527094100-27.png]]
461 +[[image:image-20220601142354-2.png]]
440 440  
463 +
441 441  (% class="box infomessage" %)
442 442  (((
443 443  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
444 444  )))
445 445  
446 -* 01:device adaress
469 +* 01: device adaress
447 447  
448 -* 10:function code
471 +* 10: function code
449 449  
450 450  * 00 61：Register address
451 451  
... ... @@ -463,46 +463,82 @@
463 463  
464 464  Its default device address is 01, and the following are the parameters for configuring two energy meters.
465 465  
466 -[[image:image-20220527094150-28.png]]
489 +[[image:image-20220601142452-3.png]]
467 467  
468 468  
469 -[[image:image-20220527094224-29.png]]
492 +[[image:image-20220601142607-4.png]]
470 470  
471 -**PAYLOAD:01 08 DF 43 62**
472 472  
495 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
496 +
473 473  * 08 DF is the valid value of the meter with device address 02.
474 474  * 43 62 is the valid value of the meter with device address 01.
475 475  
500 +(% style="display:none" %) (%%)
476 476  
502 +
477 477  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
478 478  
479 -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:
480 480  
506 +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.
507 +
508 +The structure is like below:
509 +
481 481  [[image:image-20220527094330-30.png]]
482 482  
483 -Connection
512 +**Connection**
484 484  
485 -* [[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
486 486  
515 +* 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"]]
487 487  
517 +
488 488  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
489 489  
520 +
490 490  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:
491 491  
492 -* [[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
523 +* 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);"]]
493 493  
494 -* [[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
525 +* 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"]]
495 495  
496 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
497 497  
528 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
529 +
530 +
498 498  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:
499 499  
500 -* [[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
533 +* 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);"]]
501 501  
502 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
503 503  
536 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
537 +
538 +
504 504  [[image:image-20220527094556-31.png]]
505 505  
541 +
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/]]
545 +
546 +
547 +== 1.8 Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. ==
548 +
549 +
550 +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.
551 +
552 +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.
553 +
554 +This is released the code under GNU LGPL licence on Github:
555 +
556 +[[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]]
557 +
558 +
559 +== 1.9 Example 9: RS485-LN and ultrasonic flow meter transmission data ==
560 +
561 +
562 +It shows how to use RS485-LN to connect to an ultrasonic flow meter and read the data from the ultrasonic flow meter.
563 +
564 +
565 +
566 +* **Specific steps**:  RS485-LN with ultrasonic flow meter
567 +*
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