Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 39.2 >
edited by Xiaoling
on 2022/05/27 09:47
To version < 63.1 >
edited by Karry Zhuang
on 2024/07/11 11:48
>
Change comment: Uploaded new attachment "1720669739434-926.png", version {1}

Summary

Details

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Author
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1 -XWiki.Xiaoling
1 +XWiki.karry
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1 -(% class="wikigeneratedid" %)
2 - **Contents:**
1 +**Table of Contents:**
3 3  
4 4  {{toc/}}
5 5  
5 +
6 +
7 +
8 +
9 +
6 6  = 1. Introduction =
7 7  
12 +
8 8  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
9 9  
10 10  
11 11  == 1.1 Example 1: Connect to Leak relay and VFD ==
12 12  
18 +
13 13  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:
14 14  
15 -[[image:image-20220527091852-1.png]]
16 16  
17 -Connection
22 +[[image:image-20220527091852-1.png||height="547" width="994"]]
18 18  
24 +**Connection**
19 19  
20 20  
21 21  [[image:image-20220527091942-2.png]](% style="display:none" %)
22 22  
23 -Connection
29 +**Connection**
24 24  
25 25  
26 -Related documents:
32 +(% style="color:blue" %)**Related documents:**
27 27  
28 -* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
29 -* [[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 +
30 30  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
31 31  
32 32  
33 33  == 1.2 Example 2: Connect to Pulse Counter ==
34 34  
43 +
35 35  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:
36 36  
37 -[[image:image-20220527092058-3.png]]
38 38  
39 -Connection
47 +[[image:image-20220527092058-3.png||height="552" width="905"]]
40 40  
49 +**Connection**
41 41  
42 -[[image:image-20220527092146-4.png]]
43 43  
44 -Connection
52 +[[image:image-20220527092146-4.png||height="507" width="906"]]
45 45  
46 -* [[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
54 +**Connection**
55 +
56 +
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 +
47 47  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
48 48  
49 -== ==
50 50  
51 -== 1.3 Example3: Use RS485-LN with energy meters ==
64 +== 1.3 Example 3: Use RS485-LN with energy meters ==
52 52  
53 53  === 1.3.1 OverView ===
54 54  
68 +
55 55  (((
56 -**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.**
57 57  )))
58 58  
59 59  (((
... ... @@ -62,11 +62,13 @@
62 62  
63 63  [[image:image-20220527092419-5.png]]
64 64  
65 -Connection1
79 +**Connection1**
66 66  
67 67  
68 68  (((
69 -How to connect with Energy Meter：
83 +(% style="color:blue" %)**How to connect with Energy Meter：**
84 +
85 +
70 70  )))
71 71  
72 72  (((
... ... @@ -78,11 +78,11 @@
78 78  )))
79 79  
80 80  (((
81 -Power Source VIN to RS485-LN VIN+
97 +Power Source **VIN** to RS485-LN **VIN+**
82 82  )))
83 83  
84 84  (((
85 -Power Source GND to RS485-LN VIN-
101 +Power Source **GND** to RS485-LN **VIN-**
86 86  )))
87 87  
88 88  (((
... ... @@ -91,101 +91,107 @@
91 91  
92 92  [[image:image-20220527092514-6.png]]
93 93  
94 -Connection2
110 +**Connection2**
95 95  
96 96  
97 97  [[image:image-20220527092555-7.png]]
98 98  
99 -Connection3
115 +**Connection3**
100 100  
101 101  
102 102  === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
103 103  
120 +
104 104  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.
105 105  
106 -[[image:image-20220527092629-8.png]]
123 +[[image:image-20220601143257-10.png]]
107 107  
108 108  
109 -(% class="box infomessage" %)
110 -(((
111 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
112 -)))
126 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
113 113  
114 114  * The first byte : slave address code (=001～247)
129 +
115 115  * The second byte : read register value function code
131 +
116 116  * 3rd and 4th bytes: start address of register to be read
133 +
117 117  * 5th and 6th bytes: Number of registers to read
135 +
118 118  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
119 119  
120 120  (((
139 +
140 +
141 +
121 121  How to parse the reading of the return command of the parameter：
122 -)))
123 123  
124 -(% class="box infomessage" %)
125 -(((
126 -**Example:** RETURN1：01 03 02 08 FD 7E 05
144 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
127 127  )))
128 128  
129 129  * The first byte ARD: slave address code (=001～254)
148 +
130 130  * The second byte: Return to read function code
150 +
131 131  * 3rd byte: total number of bytes
152 +
132 132  * 4th～5th bytes: register data
154 +
133 133  * The 6th and 7th bytes: CRC16 checksum
156 +
134 134  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
135 135  
136 -(% class="wikigeneratedid" %)
137 -(((
138 -
139 -)))
140 140  
141 141  === 1.3.3 How to configure RS485-LN and parse output commands ===
142 142  
162 +
143 143  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
144 144  
145 145  
146 -==== 1.3.3.1 via AT COMMAND: ====
166 +==== **1.3.3.1 via AT COMMAND** ====
147 147  
148 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
149 149  
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 +
150 150  (((
151 151  If the configured parameters and commands are incorrect, the return value is not obtained.
173 +
174 +
152 152  )))
153 153  
154 -[[image:image-20220527092748-9.png]]
177 +[[image:image-20220601143201-9.png]]
155 155  
156 -AT COMMAND
179 +**AT COMMAND**
157 157  
158 158  
159 159  (% class="box infomessage" %)
160 160  (((
161 - 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
162 162  )))
163 163  
164 -a: length for the return of AT+COMMAND
187 +a:  length for the return of AT+COMMAND
165 165  
166 -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.
167 167  
168 -c: define the position for valid value.
191 +c:  define the position for valid value.
169 169  
170 -[[image:image-20220527092936-10.png]]
193 +[[image:image-20220601143115-8.png]]
171 171  
172 -AT COMMAND
195 +**AT COMMAND**
173 173  
174 174  
175 175  PAYLOAD is available after the valid value is intercepted.
176 176  
200 +[[image:image-20220601143046-7.png]]
177 177  
178 -[[image:image-20220527093059-11.png]]
202 +**AT COMMAND**
179 179  
180 -AT COMMAND
181 181  
182 -
183 183  You can get configured PAYLOAD on TTN.
184 184  
185 -[[image:image-20220527093133-12.png]]
207 +[[image:image-20220601143519-1.png]]
186 186  
187 187  (((
188 -AT COMMAND
210 +**AT COMMAND**
189 189  )))
190 190  
191 191  (((
... ... @@ -193,71 +193,76 @@
193 193  )))
194 194  
195 195  (((
196 -**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
218 +(% style="color:blue" %)**Example**:
219 +
220 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
197 197  )))
198 198  
199 199  (((
200 -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)
201 201  )))
202 202  
203 203  (((
204 -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.
229 +
230 +
205 205  )))
206 206  
207 207  (((
208 -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
209 209  )))
210 210  
211 211  (((
212 -RETURN2:01 03 02 08 DC BE 1D(return data)
238 +RETURN2: 01 03 02 08 DC BE 1D(return data)
213 213  )))
214 214  
215 215  (((
216 -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.
243 +
244 +
217 217  )))
218 218  
219 219  (((
220 -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
221 221  )))
222 222  
223 223  (((
224 -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)
225 225  )))
226 226  
227 227  (((
228 -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.
229 229  )))
230 230  
231 231  (((
232 -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
233 233  )))
234 234  
235 -[[image:image-20220527093204-13.png]]
263 +[[image:image-20220601142936-6.png]]
236 236  
237 237  AT COMMAND
238 238  
239 239  
240 -(% 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.**
241 241  
242 -[[image:image-20220527093251-14.png]]
243 243  
271 +[[image:image-20220601143642-2.png]]
272 +
244 244  AT COMMAND
245 245  
246 246  
247 -==== 1.3.3.2 via LoRaWAN DOWNLINK ====
276 +==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
248 248  
278 +
249 249  [[image:image-20220527093358-15.png]]
250 250  
251 251  (((
252 -DOWNLINK
282 +**DOWNLINK**
253 253  )))
254 254  
255 -(((
256 -
257 -)))
258 258  
259 259  (((
260 -**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
261 261  )))
262 262  
263 263  (((
... ... @@ -268,7 +268,7 @@
268 268  )))
269 269  
270 270  (((
271 -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.**
272 272  )))
273 273  
274 274  (((
... ... @@ -303,41 +303,43 @@
303 303  will execute an uplink after got this command.
304 304  )))
305 305  
333 +
306 306  (((
307 -Example:
335 +(% style="color:blue" %)**Example:**
308 308  )))
309 309  
310 310  (((
311 -AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
339 +**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
312 312  )))
313 313  
314 -[[image:image-20220527093430-16.png]]
342 +[[image:image-20220601144149-6.png]]
315 315  
316 -DOWNLINK
344 +**DOWNLINK**
317 317  
318 318  
319 -[[image:image-20220527093508-17.png]]
347 +[[image:image-20220601143803-3.png]]
320 320  
321 -DOWNLINK
349 +**DOWNLINK**
322 322  
323 323  
324 -[[image:image-20220527093530-18.png]]
352 +[[image:image-20220601144053-5.png]]
325 325  
326 -DOWNLINK
354 +**DOWNLINK**
327 327  
328 328  
329 -[[image:image-20220527093607-19.png]]
357 +[[image:image-20220601143921-4.png]]
330 330  
331 -DOWNLINK
359 +**DOWNLINK**
332 332  
333 333  
334 -[[image:image-20220527093628-20.png]]
362 +[[image:image-20220601142805-5.png]]
335 335  
336 -DOWNLINK
337 -
364 +**DOWNLINK**
338 338  
366 +
339 339  === 1.3.4 How to configure and output commands for RS485 to USB ===
340 340  
369 +
341 341  (((
342 342  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.
343 343  )))
... ... @@ -360,33 +360,37 @@
360 360  
361 361  [[image:image-20220527093708-21.png]]
362 362  
363 -USB
392 +**USB**
364 364  
365 365  
366 366  [[image:image-20220527093747-22.png]]
367 367  
368 -USB
397 +**USB**
369 369  
370 370  
400 +
371 371  (((
372 372  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.
373 373  )))
374 374  
375 375  (((
376 -**Example:**  input：01 03 00 31 00 02 95 c4
406 +(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
377 377  )))
378 378  
379 379  (((
380 380   output：01 03 04 00 00 00 42 7A 02
411 +
412 +
381 381  )))
382 382  
383 383  [[image:image-20220527093821-23.png]]
384 384  
385 -USB
417 +**USB**
386 386  
387 387  
388 388  === 1.3.5 How to configure multiple devices and modify device addresses ===
389 389  
422 +
390 390  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.
391 391  
392 392  (((
... ... @@ -395,15 +395,18 @@
395 395  )))
396 396  )))
397 397  
398 -[[image:image-20220527093849-24.png]]
431 +[[image:image-20220601142044-1.png]]
399 399  
400 400  
401 -**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.
402 402  
436 +
403 403  [[image:image-20220527093950-25.png]]
404 404  
439 +
405 405  [[image:image-20220527094028-26.png]]
406 406  
442 +
407 407  (((
408 408  (((
409 409  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.
... ... @@ -412,7 +412,7 @@
412 412  
413 413  (((
414 414  (((
415 -We can use AT+CFGDEV to set the device address.
451 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
416 416  )))
417 417  )))
418 418  
... ... @@ -422,16 +422,17 @@
422 422  )))
423 423  )))
424 424  
425 -[[image:image-20220527094100-27.png]]
461 +[[image:image-20220601142354-2.png]]
426 426  
463 +
427 427  (% class="box infomessage" %)
428 428  (((
429 429  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
430 430  )))
431 431  
432 -* 01:device adaress
469 +* 01: device adaress
433 433  
434 -* 10:function code
471 +* 10: function code
435 435  
436 436  * 00 61：Register address
437 437  
... ... @@ -449,44 +449,82 @@
449 449  
450 450  Its default device address is 01, and the following are the parameters for configuring two energy meters.
451 451  
452 -[[image:image-20220527094150-28.png]]
489 +[[image:image-20220601142452-3.png]]
453 453  
454 454  
455 -[[image:image-20220527094224-29.png]]
492 +[[image:image-20220601142607-4.png]]
456 456  
457 -PAYLOAD:01 08 DF 43 62
458 458  
495 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
496 +
459 459  * 08 DF is the valid value of the meter with device address 02.
460 460  * 43 62 is the valid value of the meter with device address 01.
461 461  
500 +(% style="display:none" %) (%%)
501 +
502 +
462 462  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
463 463  
464 -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:
465 465  
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 +
466 466  [[image:image-20220527094330-30.png]]
467 467  
468 -Connection
512 +**Connection**
469 469  
470 -* [[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
471 471  
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"]]
516 +
517 +
472 472  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
473 473  
520 +
474 474  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:
475 475  
476 -* [[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);"]]
477 477  
478 -* [[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"]]
479 479  
480 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
481 481  
528 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
529 +
530 +
482 482  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:
483 483  
484 -* [[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);"]]
485 485  
486 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
487 487  
536 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
537 +
538 +
488 488  [[image:image-20220527094556-31.png]]
489 489  
541 +
490 490  Network Structure
491 491  
492 492  * [[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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