Last modified by Karry Zhuang on 2024/07/11 11:58
<
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edited by Xiaoling
on 2022/06/01 14:12
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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  (((
... ... @@ -70,12 +70,13 @@
70 70  
71 71  [[image:image-20220527092419-5.png]]
72 72  
73 -Connection1
79 +**Connection1**
74 74  
75 75  
76 -
77 77  (((
78 -How to connect with Energy Meter：
83 +(% style="color:blue" %)**How to connect with Energy Meter：**
84 +
85 +
79 79  )))
80 80  
81 81  (((
... ... @@ -87,11 +87,11 @@
87 87  )))
88 88  
89 89  (((
90 -Power Source VIN to RS485-LN VIN+
97 +Power Source **VIN** to RS485-LN **VIN+**
91 91  )))
92 92  
93 93  (((
94 -Power Source GND to RS485-LN VIN-
101 +Power Source **GND** to RS485-LN **VIN-**
95 95  )))
96 96  
97 97  (((
... ... @@ -100,101 +100,107 @@
100 100  
101 101  [[image:image-20220527092514-6.png]]
102 102  
103 -Connection2
110 +**Connection2**
104 104  
105 105  
106 106  [[image:image-20220527092555-7.png]]
107 107  
108 -Connection3
115 +**Connection3**
109 109  
110 110  
111 -=== **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 ===
112 112  
120 +
113 113  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.
114 114  
115 -[[image:image-20220527092629-8.png]]
123 +[[image:image-20220601143257-10.png]]
116 116  
117 117  
118 -(% class="box infomessage" %)
119 -(((
120 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
121 -)))
126 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
122 122  
123 123  * The first byte : slave address code (=001～247)
129 +
124 124  * The second byte : read register value function code
131 +
125 125  * 3rd and 4th bytes: start address of register to be read
133 +
126 126  * 5th and 6th bytes: Number of registers to read
135 +
127 127  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
128 128  
129 129  (((
139 +
140 +
141 +
130 130  How to parse the reading of the return command of the parameter：
131 -)))
132 132  
133 -(% class="box infomessage" %)
134 -(((
135 -**Example:** RETURN1：01 03 02 08 FD 7E 05
144 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
136 136  )))
137 137  
138 138  * The first byte ARD: slave address code (=001～254)
148 +
139 139  * The second byte: Return to read function code
150 +
140 140  * 3rd byte: total number of bytes
152 +
141 141  * 4th～5th bytes: register data
154 +
142 142  * The 6th and 7th bytes: CRC16 checksum
156 +
143 143  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
144 144  
145 -(% class="wikigeneratedid" %)
146 -(((
147 -
148 -)))
149 149  
150 -=== **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 ===
151 151  
162 +
152 152  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
153 153  
154 154  
155 -==== **1.3.3.1 via AT COMMAND:** ====
166 +==== **1.3.3.1 via AT COMMAND** ====
156 156  
157 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
158 158  
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 +
159 159  (((
160 160  If the configured parameters and commands are incorrect, the return value is not obtained.
173 +
174 +
161 161  )))
162 162  
163 -[[image:image-20220527092748-9.png]]
177 +[[image:image-20220601143201-9.png]]
164 164  
165 -AT COMMAND
179 +**AT COMMAND**
166 166  
167 167  
168 168  (% class="box infomessage" %)
169 169  (((
170 - 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
171 171  )))
172 172  
173 -a: length for the return of AT+COMMAND
187 +a:  length for the return of AT+COMMAND
174 174  
175 -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.
176 176  
177 -c: define the position for valid value.
191 +c:  define the position for valid value.
178 178  
179 -[[image:image-20220527092936-10.png]]
193 +[[image:image-20220601143115-8.png]]
180 180  
181 -AT COMMAND
195 +**AT COMMAND**
182 182  
183 183  
184 184  PAYLOAD is available after the valid value is intercepted.
185 185  
200 +[[image:image-20220601143046-7.png]]
186 186  
187 -[[image:image-20220527093059-11.png]]
202 +**AT COMMAND**
188 188  
189 -AT COMMAND
190 190  
191 -
192 192  You can get configured PAYLOAD on TTN.
193 193  
194 -[[image:image-20220527093133-12.png]]
207 +[[image:image-20220601143519-1.png]]
195 195  
196 196  (((
197 -AT COMMAND
210 +**AT COMMAND**
198 198  )))
199 199  
200 200  (((
... ... @@ -202,77 +202,76 @@
202 202  )))
203 203  
204 204  (((
205 -(% style="color:#4f81bd" %)**Example**:
218 +(% style="color:blue" %)**Example**:
206 206  
207 -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
208 208  )))
209 209  
210 210  (((
211 -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)
212 212  )))
213 213  
214 214  (((
215 -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.
216 216  
217 217  
218 218  )))
219 219  
220 220  (((
221 -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
222 222  )))
223 223  
224 224  (((
225 -RETURN2:01 03 02 08 DC BE 1D(return data)
238 +RETURN2: 01 03 02 08 DC BE 1D(return data)
226 226  )))
227 227  
228 228  (((
229 -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.
230 230  
231 231  
232 232  )))
233 233  
234 234  (((
235 -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
236 236  )))
237 237  
238 238  (((
239 -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)
240 240  )))
241 241  
242 242  (((
243 -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.
244 244  )))
245 245  
246 246  (((
247 -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
248 248  )))
249 249  
250 -[[image:image-20220527093204-13.png]]
263 +[[image:image-20220601142936-6.png]]
251 251  
252 252  AT COMMAND
253 253  
254 254  
255 -(% 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.**
256 256  
257 -[[image:image-20220527093251-14.png]]
258 258  
271 +[[image:image-20220601143642-2.png]]
272 +
259 259  AT COMMAND
260 260  
261 261  
262 262  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
263 263  
278 +
264 264  [[image:image-20220527093358-15.png]]
265 265  
266 266  (((
267 -DOWNLINK
282 +**DOWNLINK**
268 268  )))
269 269  
270 -(((
271 -
272 -)))
273 273  
274 274  (((
275 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
276 276  )))
277 277  
278 278  (((
... ... @@ -283,7 +283,7 @@
283 283  )))
284 284  
285 285  (((
286 -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.**
287 287  )))
288 288  
289 289  (((
... ... @@ -318,8 +318,9 @@
318 318  will execute an uplink after got this command.
319 319  )))
320 320  
333 +
321 321  (((
322 -(% style="color:#4f81bd" %)**Example:**
335 +(% style="color:blue" %)**Example:**
323 323  )))
324 324  
325 325  (((
... ... @@ -326,33 +326,34 @@
326 326  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
327 327  )))
328 328  
329 -[[image:image-20220527093430-16.png]]
342 +[[image:image-20220601144149-6.png]]
330 330  
331 -DOWNLINK
344 +**DOWNLINK**
332 332  
333 333  
334 -[[image:image-20220527093508-17.png]]
347 +[[image:image-20220601143803-3.png]]
335 335  
336 -DOWNLINK
349 +**DOWNLINK**
337 337  
338 338  
339 -[[image:image-20220527093530-18.png]]
352 +[[image:image-20220601144053-5.png]]
340 340  
341 -DOWNLINK
354 +**DOWNLINK**
342 342  
343 343  
344 -[[image:image-20220527093607-19.png]]
357 +[[image:image-20220601143921-4.png]]
345 345  
346 -DOWNLINK
359 +**DOWNLINK**
347 347  
348 348  
349 -[[image:image-20220527093628-20.png]]
362 +[[image:image-20220601142805-5.png]]
350 350  
351 -DOWNLINK
352 -
364 +**DOWNLINK**
353 353  
354 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
355 355  
367 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
368 +
369 +
356 356  (((
357 357  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.
358 358  )))
... ... @@ -375,33 +375,37 @@
375 375  
376 376  [[image:image-20220527093708-21.png]]
377 377  
378 -USB
392 +**USB**
379 379  
380 380  
381 381  [[image:image-20220527093747-22.png]]
382 382  
383 -USB
397 +**USB**
384 384  
385 385  
400 +
386 386  (((
387 387  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.
388 388  )))
389 389  
390 390  (((
391 -(% 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
392 392  )))
393 393  
394 394  (((
395 395   output：01 03 04 00 00 00 42 7A 02
411 +
412 +
396 396  )))
397 397  
398 398  [[image:image-20220527093821-23.png]]
399 399  
400 -USB
417 +**USB**
401 401  
402 402  
403 -=== **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 ===
404 404  
422 +
405 405  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.
406 406  
407 407  (((
... ... @@ -410,15 +410,18 @@
410 410  )))
411 411  )))
412 412  
413 -[[image:image-20220527093849-24.png]]
431 +[[image:image-20220601142044-1.png]]
414 414  
415 415  
416 -**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.
417 417  
436 +
418 418  [[image:image-20220527093950-25.png]]
419 419  
439 +
420 420  [[image:image-20220527094028-26.png]]
421 421  
442 +
422 422  (((
423 423  (((
424 424  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.
... ... @@ -427,7 +427,7 @@
427 427  
428 428  (((
429 429  (((
430 -We can use AT+CFGDEV to set the device address.
451 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
431 431  )))
432 432  )))
433 433  
... ... @@ -437,16 +437,17 @@
437 437  )))
438 438  )))
439 439  
440 -[[image:image-20220527094100-27.png]]
461 +[[image:image-20220601142354-2.png]]
441 441  
463 +
442 442  (% class="box infomessage" %)
443 443  (((
444 444  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
445 445  )))
446 446  
447 -* 01:device adaress
469 +* 01: device adaress
448 448  
449 -* 10:function code
471 +* 10: function code
450 450  
451 451  * 00 61：Register address
452 452  
... ... @@ -464,46 +464,82 @@
464 464  
465 465  Its default device address is 01, and the following are the parameters for configuring two energy meters.
466 466  
467 -[[image:image-20220527094150-28.png]]
489 +[[image:image-20220601142452-3.png]]
468 468  
469 469  
470 -[[image:image-20220527094224-29.png]]
492 +[[image:image-20220601142607-4.png]]
471 471  
472 -**PAYLOAD:01 08 DF 43 62**
473 473  
495 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
496 +
474 474  * 08 DF is the valid value of the meter with device address 02.
475 475  * 43 62 is the valid value of the meter with device address 01.
476 476  
500 +(% style="display:none" %) (%%)
477 477  
502 +
478 478  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
479 479  
480 -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:
481 481  
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 +
482 482  [[image:image-20220527094330-30.png]]
483 483  
484 -Connection
512 +**Connection**
485 485  
486 -* [[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
487 487  
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"]]
488 488  
517 +
489 489  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
490 490  
520 +
491 491  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:
492 492  
493 -* [[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);"]]
494 494  
495 -* [[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"]]
496 496  
497 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
498 498  
528 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
529 +
530 +
499 499  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:
500 500  
501 -* [[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);"]]
502 502  
503 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
504 504  
536 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
537 +
538 +
505 505  [[image:image-20220527094556-31.png]]
506 506  
541 +
507 507  Network Structure
508 508  
509 509  * [[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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