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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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  
... ... @@ -8,59 +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 -* [[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
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 +
54 54  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
55 55  
56 -== ==
57 57  
58 -== **1.3 Example3: Use RS485-LN with energy meters** ==
64 +== 1.3 Example 3: Use RS485-LN with energy meters ==
59 59  
60 -=== **1.3.1 OverView** ===
66 +=== 1.3.1 OverView ===
61 61  
68 +
62 62  (((
63 -**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.**
64 64  )))
65 65  
66 66  (((
... ... @@ -69,11 +69,13 @@
69 69  
70 70  [[image:image-20220527092419-5.png]]
71 71  
72 -Connection1
79 +**Connection1**
73 73  
74 74  
75 75  (((
76 -How to connect with Energy Meter：
83 +(% style="color:blue" %)**How to connect with Energy Meter：**
84 +
85 +
77 77  )))
78 78  
79 79  (((
... ... @@ -85,11 +85,11 @@
85 85  )))
86 86  
87 87  (((
88 -Power Source VIN to RS485-LN VIN+
97 +Power Source **VIN** to RS485-LN **VIN+**
89 89  )))
90 90  
91 91  (((
92 -Power Source GND to RS485-LN VIN-
101 +Power Source **GND** to RS485-LN **VIN-**
93 93  )))
94 94  
95 95  (((
... ... @@ -98,101 +98,107 @@
98 98  
99 99  [[image:image-20220527092514-6.png]]
100 100  
101 -Connection2
110 +**Connection2**
102 102  
103 103  
104 104  [[image:image-20220527092555-7.png]]
105 105  
106 -Connection3
115 +**Connection3**
107 107  
108 108  
109 -=== **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 ===
110 110  
120 +
111 111  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.
112 112  
113 -[[image:image-20220527092629-8.png]]
123 +[[image:image-20220601143257-10.png]]
114 114  
115 115  
116 -(% class="box infomessage" %)
117 -(((
118 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
119 -)))
126 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
120 120  
121 121  * The first byte : slave address code (=001～247)
129 +
122 122  * The second byte : read register value function code
131 +
123 123  * 3rd and 4th bytes: start address of register to be read
133 +
124 124  * 5th and 6th bytes: Number of registers to read
135 +
125 125  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
126 126  
127 127  (((
139 +
140 +
141 +
128 128  How to parse the reading of the return command of the parameter：
129 -)))
130 130  
131 -(% class="box infomessage" %)
132 -(((
133 -**Example:** RETURN1：01 03 02 08 FD 7E 05
144 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
134 134  )))
135 135  
136 136  * The first byte ARD: slave address code (=001～254)
148 +
137 137  * The second byte: Return to read function code
150 +
138 138  * 3rd byte: total number of bytes
152 +
139 139  * 4th～5th bytes: register data
154 +
140 140  * The 6th and 7th bytes: CRC16 checksum
156 +
141 141  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
142 142  
143 -(% class="wikigeneratedid" %)
144 -(((
145 -
146 -)))
147 147  
148 -=== **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 ===
149 149  
162 +
150 150  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
151 151  
152 152  
153 -==== **1.3.3.1 via AT COMMAND:** ====
166 +==== **1.3.3.1 via AT COMMAND** ====
154 154  
155 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
156 156  
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 +
157 157  (((
158 158  If the configured parameters and commands are incorrect, the return value is not obtained.
173 +
174 +
159 159  )))
160 160  
161 -[[image:image-20220527092748-9.png]]
177 +[[image:image-20220601143201-9.png]]
162 162  
163 -AT COMMAND
179 +**AT COMMAND**
164 164  
165 165  
166 166  (% class="box infomessage" %)
167 167  (((
168 - 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
169 169  )))
170 170  
171 -a: length for the return of AT+COMMAND
187 +a:  length for the return of AT+COMMAND
172 172  
173 -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.
174 174  
175 -c: define the position for valid value.
191 +c:  define the position for valid value.
176 176  
177 -[[image:image-20220527092936-10.png]]
193 +[[image:image-20220601143115-8.png]]
178 178  
179 -AT COMMAND
195 +**AT COMMAND**
180 180  
181 181  
182 182  PAYLOAD is available after the valid value is intercepted.
183 183  
200 +[[image:image-20220601143046-7.png]]
184 184  
185 -[[image:image-20220527093059-11.png]]
202 +**AT COMMAND**
186 186  
187 -AT COMMAND
188 188  
189 -
190 190  You can get configured PAYLOAD on TTN.
191 191  
192 -[[image:image-20220527093133-12.png]]
207 +[[image:image-20220601143519-1.png]]
193 193  
194 194  (((
195 -AT COMMAND
210 +**AT COMMAND**
196 196  )))
197 197  
198 198  (((
... ... @@ -200,77 +200,76 @@
200 200  )))
201 201  
202 202  (((
203 -(% style="color:#4f81bd" %)**Example**:
218 +(% style="color:blue" %)**Example**:
204 204  
205 -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
206 206  )))
207 207  
208 208  (((
209 -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)
210 210  )))
211 211  
212 212  (((
213 -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.
214 214  
215 215  
216 216  )))
217 217  
218 218  (((
219 -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
220 220  )))
221 221  
222 222  (((
223 -RETURN2:01 03 02 08 DC BE 1D(return data)
238 +RETURN2: 01 03 02 08 DC BE 1D(return data)
224 224  )))
225 225  
226 226  (((
227 -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.
228 228  
229 229  
230 230  )))
231 231  
232 232  (((
233 -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
234 234  )))
235 235  
236 236  (((
237 -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)
238 238  )))
239 239  
240 240  (((
241 -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.
242 242  )))
243 243  
244 244  (((
245 -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
246 246  )))
247 247  
248 -[[image:image-20220527093204-13.png]]
263 +[[image:image-20220601142936-6.png]]
249 249  
250 250  AT COMMAND
251 251  
252 252  
253 -(% 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.**
254 254  
255 -[[image:image-20220527093251-14.png]]
256 256  
271 +[[image:image-20220601143642-2.png]]
272 +
257 257  AT COMMAND
258 258  
259 259  
260 260  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
261 261  
278 +
262 262  [[image:image-20220527093358-15.png]]
263 263  
264 264  (((
265 -DOWNLINK
282 +**DOWNLINK**
266 266  )))
267 267  
268 -(((
269 -
270 -)))
271 271  
272 272  (((
273 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
274 274  )))
275 275  
276 276  (((
... ... @@ -281,7 +281,7 @@
281 281  )))
282 282  
283 283  (((
284 -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.**
285 285  )))
286 286  
287 287  (((
... ... @@ -316,8 +316,9 @@
316 316  will execute an uplink after got this command.
317 317  )))
318 318  
333 +
319 319  (((
320 -(% style="color:#4f81bd" %)**Example:**
335 +(% style="color:blue" %)**Example:**
321 321  )))
322 322  
323 323  (((
... ... @@ -324,33 +324,34 @@
324 324  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
325 325  )))
326 326  
327 -[[image:image-20220527093430-16.png]]
342 +[[image:image-20220601144149-6.png]]
328 328  
329 -DOWNLINK
344 +**DOWNLINK**
330 330  
331 331  
332 -[[image:image-20220527093508-17.png]]
347 +[[image:image-20220601143803-3.png]]
333 333  
334 -DOWNLINK
349 +**DOWNLINK**
335 335  
336 336  
337 -[[image:image-20220527093530-18.png]]
352 +[[image:image-20220601144053-5.png]]
338 338  
339 -DOWNLINK
354 +**DOWNLINK**
340 340  
341 341  
342 -[[image:image-20220527093607-19.png]]
357 +[[image:image-20220601143921-4.png]]
343 343  
344 -DOWNLINK
359 +**DOWNLINK**
345 345  
346 346  
347 -[[image:image-20220527093628-20.png]]
362 +[[image:image-20220601142805-5.png]]
348 348  
349 -DOWNLINK
350 -
364 +**DOWNLINK**
351 351  
352 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
353 353  
367 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
368 +
369 +
354 354  (((
355 355  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.
356 356  )))
... ... @@ -373,33 +373,37 @@
373 373  
374 374  [[image:image-20220527093708-21.png]]
375 375  
376 -USB
392 +**USB**
377 377  
378 378  
379 379  [[image:image-20220527093747-22.png]]
380 380  
381 -USB
397 +**USB**
382 382  
383 383  
400 +
384 384  (((
385 385  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.
386 386  )))
387 387  
388 388  (((
389 -(% 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
390 390  )))
391 391  
392 392  (((
393 393   output：01 03 04 00 00 00 42 7A 02
411 +
412 +
394 394  )))
395 395  
396 396  [[image:image-20220527093821-23.png]]
397 397  
398 -USB
417 +**USB**
399 399  
400 400  
401 -=== **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 ===
402 402  
422 +
403 403  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.
404 404  
405 405  (((
... ... @@ -408,15 +408,18 @@
408 408  )))
409 409  )))
410 410  
411 -[[image:image-20220527093849-24.png]]
431 +[[image:image-20220601142044-1.png]]
412 412  
413 413  
414 -**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.
415 415  
436 +
416 416  [[image:image-20220527093950-25.png]]
417 417  
439 +
418 418  [[image:image-20220527094028-26.png]]
419 419  
442 +
420 420  (((
421 421  (((
422 422  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.
... ... @@ -425,7 +425,7 @@
425 425  
426 426  (((
427 427  (((
428 -We can use AT+CFGDEV to set the device address.
451 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
429 429  )))
430 430  )))
431 431  
... ... @@ -435,16 +435,17 @@
435 435  )))
436 436  )))
437 437  
438 -[[image:image-20220527094100-27.png]]
461 +[[image:image-20220601142354-2.png]]
439 439  
463 +
440 440  (% class="box infomessage" %)
441 441  (((
442 442  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
443 443  )))
444 444  
445 -* 01:device adaress
469 +* 01: device adaress
446 446  
447 -* 10:function code
471 +* 10: function code
448 448  
449 449  * 00 61：Register address
450 450  
... ... @@ -462,46 +462,82 @@
462 462  
463 463  Its default device address is 01, and the following are the parameters for configuring two energy meters.
464 464  
465 -[[image:image-20220527094150-28.png]]
489 +[[image:image-20220601142452-3.png]]
466 466  
467 467  
468 -[[image:image-20220527094224-29.png]]
492 +[[image:image-20220601142607-4.png]]
469 469  
470 -**PAYLOAD:01 08 DF 43 62**
471 471  
495 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
496 +
472 472  * 08 DF is the valid value of the meter with device address 02.
473 473  * 43 62 is the valid value of the meter with device address 01.
474 474  
500 +(% style="display:none" %) (%%)
475 475  
502 +
476 476  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
477 477  
478 -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:
479 479  
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 +
480 480  [[image:image-20220527094330-30.png]]
481 481  
482 -Connection
512 +**Connection**
483 483  
484 -* [[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
485 485  
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"]]
486 486  
517 +
487 487  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
488 488  
520 +
489 489  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:
490 490  
491 -* [[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);"]]
492 492  
493 -* [[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"]]
494 494  
495 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
496 496  
528 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
529 +
530 +
497 497  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:
498 498  
499 -* [[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);"]]
500 500  
501 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
502 502  
536 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
537 +
538 +
503 503  [[image:image-20220527094556-31.png]]
504 504  
541 +
505 505  Network Structure
506 506  
507 507  * [[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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