Last modified by Karry Zhuang on 2025/03/06 16:34
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... ... @@ -132,6 +132,8 @@
132 132  )))
133 133  
134 134  [[image:1653268091319-405.png]]
135 +
136 +
135 135  )))
136 136  
137 137  = 3. Operation Mode =
... ... @@ -140,6 +140,8 @@
140 140  
141 141  (((
142 142  The RS485-LN is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the RS485-LN. It will auto join the network via OTAA.
145 +
146 +
143 143  )))
144 144  
145 145  == 3.2 Example to join LoRaWAN network ==
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148 148  
149 149  [[image:1653268155545-638.png||height="334" width="724"]]
150 150  
155 +
151 151  (((
157 +(((
152 152  The RS485-LN in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method. The connection is as below:
159 +)))
153 153  
161 +(((
154 154  485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
163 +)))
155 155  
156 156  [[image:1653268227651-549.png||height="592" width="720"]]
157 157  
... ... @@ -203,6 +203,7 @@
203 203  
204 204  [[image:1652953568895-172.png||height="232" width="724"]]
205 205  
215 +
206 206  == 3.3 Configure Commands to read data ==
207 207  
208 208  (((
... ... @@ -212,6 +212,8 @@
212 212  
213 213  (((
214 214  (% style="color:red" %)Note: below description and commands are for firmware version >v1.1, if you have firmware version v1.0. Please check the [[user manual v1.0>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/&file=RS485-LN_UserManual_v1.0.1.pdf]] or upgrade the firmware to v1.1
225 +
226 +
215 215  )))
216 216  )))
217 217  
... ... @@ -219,19 +219,19 @@
219 219  
220 220  To use RS485-LN to read data from RS485 sensors, connect the RS485-LN A/B traces to the sensors. And user need to make sure RS485-LN use the match UART setting to access the sensors. The related commands for UART settings are:
221 221  
222 -(% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
223 -|(((
234 +(% border="1" style="background-color:#ffffcc; color:green; width:782px" %)
235 +|(% style="width:128px" %)(((
224 224  **AT Commands**
225 -)))|(% style="width:285px" %)(((
237 +)))|(% style="width:305px" %)(((
226 226  **Description**
227 -)))|(% style="width:347px" %)(((
239 +)))|(% style="width:346px" %)(((
228 228  **Example**
229 229  )))
230 -|(((
242 +|(% style="width:128px" %)(((
231 231  AT+BAUDR
232 -)))|(% style="width:285px" %)(((
244 +)))|(% style="width:305px" %)(((
233 233  Set the baud rate (for RS485 connection). Default Value is: 9600.
234 -)))|(% style="width:347px" %)(((
246 +)))|(% style="width:346px" %)(((
235 235  (((
236 236  AT+BAUDR=9600
237 237  )))
... ... @@ -240,11 +240,11 @@
240 240  Options: (1200,2400,4800,14400,19200,115200)
241 241  )))
242 242  )))
243 -|(((
255 +|(% style="width:128px" %)(((
244 244  AT+PARITY
245 -)))|(% style="width:285px" %)(((
257 +)))|(% style="width:305px" %)(((
246 246  Set UART parity (for RS485 connection)
247 -)))|(% style="width:347px" %)(((
259 +)))|(% style="width:346px" %)(((
248 248  (((
249 249  AT+PARITY=0
250 250  )))
... ... @@ -253,9 +253,9 @@
253 253  Option: 0: no parity, 1: odd parity, 2: even parity
254 254  )))
255 255  )))
256 -|(((
268 +|(% style="width:128px" %)(((
257 257  AT+STOPBIT
258 -)))|(% style="width:285px" %)(((
270 +)))|(% style="width:305px" %)(((
259 259  (((
260 260  Set serial stopbit (for RS485 connection)
261 261  )))
... ... @@ -263,7 +263,7 @@
263 263  (((
264 264  
265 265  )))
266 -)))|(% style="width:347px" %)(((
278 +)))|(% style="width:346px" %)(((
267 267  (((
268 268  AT+STOPBIT=0 for 1bit
269 269  )))
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277 277  )))
278 278  )))
279 279  
292 +
293 +
280 280  === 3.3.2 Configure sensors ===
281 281  
282 282  (((
... ... @@ -295,80 +295,41 @@
295 295  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
296 296  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
297 297  
298 -=== 3.3.3 Configure read commands for each sampling ===
299 299  
300 -(((
301 -RS485-BL is a battery powered device; it will sleep most of time. And wake up on each period and read RS485 / TTL sensor data and uplink.
302 -)))
303 303  
304 -(((
305 -During each sampling, we need to confirm what commands we need to send to the sensors to read data. After the RS485/TTL sensors send back the value, it normally includes some bytes and we only need a few from them for a shorten payload.
306 -)))
314 +=== 3.3.3 Configure read commands for each sampling ===
307 307  
308 308  (((
317 +During each sampling, we need confirm what commands we need to send to the RS485 sensors to read data. After the RS485 sensors send back the value, it normally include some bytes and we only need a few from them for a shorten payload.
318 +
309 309  To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
310 -)))
311 311  
312 -(((
313 313  This section describes how to achieve above goals.
314 -)))
315 315  
316 -(((
317 -During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
318 -)))
323 +During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
319 319  
320 -(((
321 -**Command from RS485-BL to Sensor:**
322 -)))
323 323  
324 -(((
325 -RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
326 -)))
326 +**Each RS485 commands include two parts:**
327 327  
328 -(((
329 -**Handle return from sensors to RS485-BL**:
330 -)))
328 +~1. What commands RS485-LN will send to the RS485 sensors. There are total 15 commands from **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF**. All commands are of same grammar.
331 331  
332 -(((
333 -After RS485-BL send out a string to sensor, RS485-BL will wait for the return from RS485 or TTL sensor. And user can specify how to handle the return, by **AT+DATACUT or AT+SEARCH commands**
334 -)))
330 +2. How to get wanted value the from RS485 sensors returns from by 1). There are total 15 AT Commands to handle the return, commands are **AT+DATACUT1**,**AT+DATACUT2**,…, **AT+DATACUTF** corresponding to the commands from 1). All commands are of same grammar.
335 335  
336 -* (((
337 -**AT+DATACUT**
338 -)))
332 +3. Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example
339 339  
340 -(((
341 -When the return value from sensor have fix length and we know which position the valid value we should get, we can use AT+DATACUT command.
342 -)))
334 +**AT+CMDDL1=1000** to send the open time to 1000ms
343 343  
344 -* (((
345 -**AT+SEARCH**
346 -)))
347 347  
348 -(((
349 -When the return value from sensor is dynamic length and we are not sure which bytes the valid data is, instead, we know what value the valid value following. We can use AT+SEARCH to search the valid value in the return string.
350 -)))
351 -
352 -(((
353 -**Define wait timeout:**
354 -)))
355 -
356 -(((
357 -Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example, AT+CMDDL1=1000 to send the open time to 1000ms
358 -)))
359 -
360 -(((
361 361  After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
362 -)))
363 363  
364 -**Examples:**
365 365  
366 366  Below are examples for the how above AT Commands works.
367 367  
368 -**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
369 369  
370 -(% border="1" class="table-bordered" %)
371 -|(((
343 +**AT+COMMANDx : **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
344 +
345 +(% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
346 +|(% style="width:496px" %)(((
372 372  **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
373 373  
374 374  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
... ... @@ -376,90 +376,40 @@
376 376  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
377 377  )))
378 378  
379 -(((
380 380  For example, if we have a RS485 sensor. The command to get sensor value is: 01 03 0B B8 00 02 46 0A. Where 01 03 0B B8 00 02 is the Modbus command to read the register 0B B8 where stored the sensor value. The 46 0A is the CRC-16/MODBUS which calculate manually.
381 -)))
382 382  
383 -(((
384 -In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
385 -)))
356 +In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
386 386  
387 -(((
388 -**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
389 -)))
390 390  
391 -(% border="1" class="table-bordered" %)
392 -|(((
393 -**AT+SEARCHx=aa,xx xx xx xx xx**
394 -
395 -* **aa: 1: prefix match mode; 2: prefix and suffix match mode**
396 -* **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
397 -
398 -
399 -)))
400 -
401 -**Examples:**
402 -
403 -~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
404 -
405 -If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
406 -
407 -The valid data will be all bytes after 1E 56 34 , so it is (% style="background-color:yellow" %)** 2e 30 58 5f 36 41 30 31 00 49**
408 -
409 -[[image:1653269403619-508.png]]
410 -
411 -2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
412 -
413 -If we set AT+SEARCH1=2, 1E 56 34+31 00 49
414 -
415 -Device will search the bytes between 1E 56 34 and 31 00 49. So it is (% style="background-color:yellow" %)** 2e 30 58 5f 36 41 30**
416 -
417 -[[image:1653269438444-278.png]]
418 -
419 419  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
420 420  
421 -|(((
361 +(% border="1" style="background-color:#4bacc6; color:white; width:725px" %)
362 +|(% style="width:722px" %)(((
422 422  **AT+DATACUTx=a,b,c**
423 423  
424 424  * **a: length for the return of AT+COMMAND**
425 425  * **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
426 -* **c: define the position for valid value.  **
367 +* **c: define the position for valid value. **
427 427  )))
428 428  
429 -Examples:
430 430  
371 +**Examples:**
372 +
431 431  * Grab bytes:
432 432  
433 -[[image:1653269551753-223.png||height="311" width="717"]]
375 +[[image:image-20220602153621-1.png]]
434 434  
377 +
435 435  * Grab a section.
436 436  
437 -[[image:1653269568276-930.png||height="325" width="718"]]
380 +[[image:image-20220602153621-2.png]]
438 438  
382 +
439 439  * Grab different sections.
440 440  
441 -[[image:1653269593172-426.png||height="303" width="725"]]
385 +[[image:image-20220602153621-3.png]]
386 +)))
442 442  
443 -(% style="color:red" %)**Note:**
444 -
445 -AT+SEARCHx and AT+DATACUTx can be used together, if both commands are set, RS485-BL will first process AT+SEARCHx on the return string and get a temporary string, and then process AT+DATACUTx on this temporary string to get the final payload. In this case, AT+DATACUTx need to set to format AT+DATACUTx=0,xx,xx where the return bytes set to 0.
446 -
447 -Example:
448 -
449 -(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
450 -
451 -(% style="color:red" %)AT+SEARCH1=1,1E 56 34
452 -
453 -(% style="color:red" %)AT+DATACUT1=0,2,1~~5
454 -
455 -(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
456 -
457 -(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
458 -
459 -(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
460 -
461 -[[image:1653269618463-608.png]]
462 -
463 463  === 3.3.4 Compose the uplink payload ===
464 464  
465 465  (((
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