Last modified by Karry Zhuang on 2024/07/11 11:58
<
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edited by Xiaoling
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edited by Karry Zhuang
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Page properties
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  (((
... ... @@ -100,75 +100,81 @@
100 100  
101 101  [[image:image-20220527092514-6.png]]
102 102  
103 -Connection2
110 +**Connection2**
104 104  
105 105  
106 -
107 107  [[image:image-20220527092555-7.png]]
108 108  
109 -Connection3
115 +**Connection3**
110 110  
111 111  
112 -=== **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 ===
113 113  
120 +
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]]
123 +[[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 -)))
126 +(% 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)
129 +
125 125  * The second byte : read register value function code
131 +
126 126  * 3rd and 4th bytes: start address of register to be read
133 +
127 127  * 5th and 6th bytes: Number of registers to read
135 +
128 128  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
129 129  
130 130  (((
139 +
140 +
141 +
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
144 +(% 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)
148 +
140 140  * The second byte: Return to read function code
150 +
141 141  * 3rd byte: total number of bytes
152 +
142 142  * 4th～5th bytes: register data
154 +
143 143  * The 6th and 7th bytes: CRC16 checksum
156 +
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** ===
160 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
152 152  
162 +
153 153  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
154 154  
155 155  
156 -==== **1.3.3.1 via AT COMMAND:** ====
166 +==== **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  
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 +
160 160  (((
161 161  If the configured parameters and commands are incorrect, the return value is not obtained.
173 +
174 +
162 162  )))
163 163  
164 -[[image:image-20220527092748-9.png]]
177 +[[image:image-20220601143201-9.png]]
165 165  
166 -AT COMMAND
179 +**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
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
172 172  )))
173 173  
174 174  a:  length for the return of AT+COMMAND
... ... @@ -177,27 +177,24 @@
177 177  
178 178  c:  define the position for valid value.
179 179  
180 -[[image:image-20220527092936-10.png]]
193 +[[image:image-20220601143115-8.png]]
181 181  
182 -AT COMMAND
195 +**AT COMMAND**
183 183  
184 184  
185 -
186 186  PAYLOAD is available after the valid value is intercepted.
187 187  
200 +[[image:image-20220601143046-7.png]]
188 188  
189 -[[image:image-20220527093059-11.png]]
202 +**AT COMMAND**
190 190  
191 -AT COMMAND
192 192  
193 -
194 -
195 195  You can get configured PAYLOAD on TTN.
196 196  
197 -[[image:image-20220527093133-12.png]]
207 +[[image:image-20220601143519-1.png]]
198 198  
199 199  (((
200 -AT COMMAND
210 +**AT COMMAND**
201 201  )))
202 202  
203 203  (((
... ... @@ -205,79 +205,76 @@
205 205  )))
206 206  
207 207  (((
208 -(% style="color:#4f81bd" %)**Example**:
218 +(% style="color:blue" %)**Example**:
209 209  
210 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
220 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
211 211  )))
212 212  
213 213  (((
214 -RETURN1:01 03 02 00 02 39 85 00 00(return data)
224 +RETURN1: 01 03 02 00 02 39 85 00 00(return data)
215 215  )))
216 216  
217 217  (((
218 -AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
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.
219 219  
220 220  
221 221  )))
222 222  
223 223  (((
224 -CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
234 +(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
225 225  )))
226 226  
227 227  (((
228 -RETURN2:01 03 02 08 DC BE 1D(return data)
238 +RETURN2: 01 03 02 08 DC BE 1D(return data)
229 229  )))
230 230  
231 231  (((
232 -AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
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.
233 233  
234 234  
235 235  )))
236 236  
237 237  (((
238 -CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
248 +(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
239 239  )))
240 240  
241 241  (((
242 -RETURN3:01 03 04 00 00 00 44 FA 00(return data)
252 +RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
243 243  )))
244 244  
245 245  (((
246 -AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
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.
247 247  )))
248 248  
249 249  (((
250 -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
251 251  )))
252 252  
253 -[[image:image-20220527093204-13.png]]
263 +[[image:image-20220601142936-6.png]]
254 254  
255 255  AT COMMAND
256 256  
257 257  
258 -(% style="color:#4f81bd" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
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.**
259 259  
260 260  
271 +[[image:image-20220601143642-2.png]]
261 261  
262 -[[image:image-20220527093251-14.png]]
263 -
264 264  AT COMMAND
265 265  
266 266  
267 267  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
268 268  
278 +
269 269  [[image:image-20220527093358-15.png]]
270 270  
271 271  (((
272 -DOWNLINK
282 +**DOWNLINK**
273 273  )))
274 274  
275 -(((
276 -
277 -)))
278 278  
279 279  (((
280 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
281 281  )))
282 282  
283 283  (((
... ... @@ -288,7 +288,7 @@
288 288  )))
289 289  
290 290  (((
291 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
298 +(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
292 292  )))
293 293  
294 294  (((
... ... @@ -323,8 +323,9 @@
323 323  will execute an uplink after got this command.
324 324  )))
325 325  
333 +
326 326  (((
327 -(% style="color:#4f81bd" %)**Example:**
335 +(% style="color:blue" %)**Example:**
328 328  )))
329 329  
330 330  (((
... ... @@ -331,33 +331,34 @@
331 331  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
332 332  )))
333 333  
334 -[[image:image-20220527093430-16.png]]
342 +[[image:image-20220601144149-6.png]]
335 335  
336 -DOWNLINK
344 +**DOWNLINK**
337 337  
338 338  
339 -[[image:image-20220527093508-17.png]]
347 +[[image:image-20220601143803-3.png]]
340 340  
341 -DOWNLINK
349 +**DOWNLINK**
342 342  
343 343  
344 -[[image:image-20220527093530-18.png]]
352 +[[image:image-20220601144053-5.png]]
345 345  
346 -DOWNLINK
354 +**DOWNLINK**
347 347  
348 348  
349 -[[image:image-20220527093607-19.png]]
357 +[[image:image-20220601143921-4.png]]
350 350  
351 -DOWNLINK
359 +**DOWNLINK**
352 352  
353 353  
354 -[[image:image-20220527093628-20.png]]
362 +[[image:image-20220601142805-5.png]]
355 355  
356 -DOWNLINK
357 -
364 +**DOWNLINK**
358 358  
359 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
360 360  
367 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
368 +
369 +
361 361  (((
362 362  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.
363 363  )))
... ... @@ -380,33 +380,37 @@
380 380  
381 381  [[image:image-20220527093708-21.png]]
382 382  
383 -USB
392 +**USB**
384 384  
385 385  
386 386  [[image:image-20220527093747-22.png]]
387 387  
388 -USB
397 +**USB**
389 389  
390 390  
400 +
391 391  (((
392 392  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.
393 393  )))
394 394  
395 395  (((
396 -(% 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
397 397  )))
398 398  
399 399  (((
400 400   output：01 03 04 00 00 00 42 7A 02
411 +
412 +
401 401  )))
402 402  
403 403  [[image:image-20220527093821-23.png]]
404 404  
405 -USB
417 +**USB**
406 406  
407 407  
408 -=== **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 ===
409 409  
422 +
410 410  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.
411 411  
412 412  (((
... ... @@ -415,15 +415,18 @@
415 415  )))
416 416  )))
417 417  
418 -[[image:image-20220527093849-24.png]]
431 +[[image:image-20220601142044-1.png]]
419 419  
420 420  
421 -**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.
422 422  
436 +
423 423  [[image:image-20220527093950-25.png]]
424 424  
439 +
425 425  [[image:image-20220527094028-26.png]]
426 426  
442 +
427 427  (((
428 428  (((
429 429  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.
... ... @@ -432,7 +432,7 @@
432 432  
433 433  (((
434 434  (((
435 -We can use AT+CFGDEV to set the device address.
451 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
436 436  )))
437 437  )))
438 438  
... ... @@ -442,16 +442,17 @@
442 442  )))
443 443  )))
444 444  
445 -[[image:image-20220527094100-27.png]]
461 +[[image:image-20220601142354-2.png]]
446 446  
463 +
447 447  (% class="box infomessage" %)
448 448  (((
449 449  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
450 450  )))
451 451  
452 -* 01:device adaress
469 +* 01: device adaress
453 453  
454 -* 10:function code
471 +* 10: function code
455 455  
456 456  * 00 61：Register address
457 457  
... ... @@ -469,46 +469,82 @@
469 469  
470 470  Its default device address is 01, and the following are the parameters for configuring two energy meters.
471 471  
472 -[[image:image-20220527094150-28.png]]
489 +[[image:image-20220601142452-3.png]]
473 473  
474 474  
475 -[[image:image-20220527094224-29.png]]
492 +[[image:image-20220601142607-4.png]]
476 476  
477 -**PAYLOAD:01 08 DF 43 62**
478 478  
495 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
496 +
479 479  * 08 DF is the valid value of the meter with device address 02.
480 480  * 43 62 is the valid value of the meter with device address 01.
481 481  
500 +(% style="display:none" %) (%%)
482 482  
502 +
483 483  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
484 484  
485 -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:
486 486  
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 +
487 487  [[image:image-20220527094330-30.png]]
488 488  
489 -Connection
512 +**Connection**
490 490  
491 -* [[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
492 492  
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"]]
493 493  
517 +
494 494  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
495 495  
520 +
496 496  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:
497 497  
498 -* [[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);"]]
499 499  
500 -* [[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"]]
501 501  
502 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
503 503  
528 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
529 +
530 +
504 504  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:
505 505  
506 -* [[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);"]]
507 507  
508 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
509 509  
536 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
537 +
538 +
510 510  [[image:image-20220527094556-31.png]]
511 511  
541 +
512 512  Network Structure
513 513  
514 514  * [[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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