Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 32.11 >
edited by Xiaoling
on 2022/06/02 15:26
To version < 41.1 >
edited by Xiaoling
on 2022/06/02 16:35
>
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -76,8 +76,6 @@
76 76  * Automatic RF Sense and CAD with ultra-fast AFC.
77 77  * Packet engine up to 256 bytes with CRC.
78 78  
79 -
80 -
81 81  == 1.3 Features ==
82 82  
83 83  * LoRaWAN Class A & Class C protocol (default Class C)
... ... @@ -89,8 +89,6 @@
89 89  * Support Modbus protocol
90 90  * Support Interrupt uplink (Since hardware version v1.2)
91 91  
92 -
93 -
94 94  == 1.4 Applications ==
95 95  
96 96  * Smart Buildings & Home Automation
... ... @@ -100,8 +100,6 @@
100 100  * Smart Cities
101 101  * Smart Factory
102 102  
103 -
104 -
105 105  == 1.5 Firmware Change log ==
106 106  
107 107  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
... ... @@ -142,6 +142,8 @@
142 142  
143 143  (((
144 144  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.
139 +
140 +
145 145  )))
146 146  
147 147  == 3.2 Example to join LoRaWAN network ==
... ... @@ -150,10 +150,15 @@
150 150  
151 151  [[image:1653268155545-638.png||height="334" width="724"]]
152 152  
149 +
153 153  (((
151 +(((
154 154  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:
153 +)))
155 155  
155 +(((
156 156  485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
157 +)))
157 157  
158 158  [[image:1653268227651-549.png||height="592" width="720"]]
159 159  
... ... @@ -205,6 +205,7 @@
205 205  
206 206  [[image:1652953568895-172.png||height="232" width="724"]]
207 207  
209 +
208 208  == 3.3 Configure Commands to read data ==
209 209  
210 210  (((
... ... @@ -214,6 +214,8 @@
214 214  
215 215  (((
216 216  (% 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
219 +
220 +
217 217  )))
218 218  )))
219 219  
... ... @@ -221,19 +221,19 @@
221 221  
222 222  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:
223 223  
224 -(% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
225 -|(((
228 +(% border="1" style="background-color:#ffffcc; color:green; width:782px" %)
229 +|(% style="width:128px" %)(((
226 226  **AT Commands**
227 -)))|(% style="width:285px" %)(((
231 +)))|(% style="width:305px" %)(((
228 228  **Description**
229 -)))|(% style="width:347px" %)(((
233 +)))|(% style="width:346px" %)(((
230 230  **Example**
231 231  )))
232 -|(((
236 +|(% style="width:128px" %)(((
233 233  AT+BAUDR
234 -)))|(% style="width:285px" %)(((
238 +)))|(% style="width:305px" %)(((
235 235  Set the baud rate (for RS485 connection). Default Value is: 9600.
236 -)))|(% style="width:347px" %)(((
240 +)))|(% style="width:346px" %)(((
237 237  (((
238 238  AT+BAUDR=9600
239 239  )))
... ... @@ -242,11 +242,11 @@
242 242  Options: (1200,2400,4800,14400,19200,115200)
243 243  )))
244 244  )))
245 -|(((
249 +|(% style="width:128px" %)(((
246 246  AT+PARITY
247 -)))|(% style="width:285px" %)(((
251 +)))|(% style="width:305px" %)(((
248 248  Set UART parity (for RS485 connection)
249 -)))|(% style="width:347px" %)(((
253 +)))|(% style="width:346px" %)(((
250 250  (((
251 251  AT+PARITY=0
252 252  )))
... ... @@ -255,9 +255,9 @@
255 255  Option: 0: no parity, 1: odd parity, 2: even parity
256 256  )))
257 257  )))
258 -|(((
262 +|(% style="width:128px" %)(((
259 259  AT+STOPBIT
260 -)))|(% style="width:285px" %)(((
264 +)))|(% style="width:305px" %)(((
261 261  (((
262 262  Set serial stopbit (for RS485 connection)
263 263  )))
... ... @@ -265,7 +265,7 @@
265 265  (((
266 266  
267 267  )))
268 -)))|(% style="width:347px" %)(((
272 +)))|(% style="width:346px" %)(((
269 269  (((
270 270  AT+STOPBIT=0 for 1bit
271 271  )))
... ... @@ -300,77 +300,34 @@
300 300  === 3.3.3 Configure read commands for each sampling ===
301 301  
302 302  (((
303 -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.
304 -)))
307 +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.
305 305  
306 -(((
307 -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.
308 -)))
309 -
310 -(((
311 311  To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
312 -)))
313 313  
314 -(((
315 315  This section describes how to achieve above goals.
316 -)))
317 317  
318 -(((
319 -During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
320 -)))
313 +During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
321 321  
322 -(((
323 -**Command from RS485-BL to Sensor:**
324 -)))
325 325  
326 -(((
327 -RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
328 -)))
316 +**Each RS485 commands include two parts:**
329 329  
330 -(((
331 -**Handle return from sensors to RS485-BL**:
332 -)))
318 +~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.
333 333  
334 -(((
335 -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**
336 -)))
320 +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.
337 337  
338 -* (((
339 -**AT+DATACUT**
340 -)))
322 +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 **AT+CMDDL1=1000** to send the open time to 1000ms
341 341  
342 -(((
343 -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.
344 -)))
345 345  
346 -* (((
347 -**AT+SEARCH**
348 -)))
349 -
350 -(((
351 -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.
352 -)))
353 -
354 -(((
355 -**Define wait timeout:**
356 -)))
357 -
358 -(((
359 -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
360 -)))
361 -
362 -(((
363 363  After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
364 -)))
365 365  
366 -**Examples:**
367 367  
368 368  Below are examples for the how above AT Commands works.
369 369  
370 -**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
371 371  
372 -(% border="1" class="table-bordered" %)
373 -|(((
331 +**AT+COMMANDx : **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
332 +
333 +(% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
334 +|(% style="width:496px" %)(((
374 374  **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
375 375  
376 376  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
... ... @@ -378,49 +378,15 @@
378 378  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
379 379  )))
380 380  
381 -(((
382 382  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.
383 -)))
384 384  
385 -(((
386 -In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
387 -)))
344 +In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
388 388  
389 -(((
390 -**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
391 -)))
392 392  
393 -(% border="1" class="table-bordered" %)
394 -|(((
395 -**AT+SEARCHx=aa,xx xx xx xx xx**
396 -
397 -* **aa: 1: prefix match mode; 2: prefix and suffix match mode**
398 -* **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
399 -
400 -
401 -)))
402 -
403 -**Examples:**
404 -
405 -~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
406 -
407 -If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
408 -
409 -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**
410 -
411 -[[image:1653269403619-508.png]]
412 -
413 -2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
414 -
415 -If we set AT+SEARCH1=2, 1E 56 34+31 00 49
416 -
417 -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**
418 -
419 -[[image:1653269438444-278.png]]
420 -
421 421  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
422 422  
423 -|(((
349 +(% border="1" style="background-color:#4bacc6; color:white; width:725px" %)
350 +|(% style="width:722px" %)(((
424 424  **AT+DATACUTx=a,b,c**
425 425  
426 426  * **a: length for the return of AT+COMMAND**
... ... @@ -428,48 +428,37 @@
428 428  * **c: define the position for valid value.  **
429 429  )))
430 430  
431 -Examples:
358 +**Examples:**
432 432  
433 433  * Grab bytes:
434 434  
435 -[[image:1653269551753-223.png||height="311" width="717"]]
362 +[[image:image-20220602153621-1.png]]
436 436  
364 +
437 437  * Grab a section.
438 438  
439 -[[image:1653269568276-930.png||height="325" width="718"]]
367 +[[image:image-20220602153621-2.png]]
440 440  
369 +
441 441  * Grab different sections.
442 442  
443 -[[image:1653269593172-426.png||height="303" width="725"]]
372 +[[image:image-20220602153621-3.png]]
444 444  
445 -(% style="color:red" %)**Note:**
374 +
375 +)))
446 446  
447 -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.
448 -
449 -Example:
450 -
451 -(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
452 -
453 -(% style="color:red" %)AT+SEARCH1=1,1E 56 34
454 -
455 -(% style="color:red" %)AT+DATACUT1=0,2,1~~5
456 -
457 -(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
458 -
459 -(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
460 -
461 -(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
462 -
463 -[[image:1653269618463-608.png]]
464 -
465 465  === 3.3.4 Compose the uplink payload ===
466 466  
467 467  (((
468 468  Through AT+COMMANDx and AT+DATACUTx we got valid value from each RS485 commands, Assume these valid value are RETURN1, RETURN2, .., to RETURNx. The next step is how to compose the LoRa Uplink Payload by these RETURNs. The command is **AT+DATAUP.**
381 +
382 +
469 469  )))
470 470  
471 471  (((
472 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
386 +(% style="color:#037691" %)**Examples: AT+DATAUP=0**
387 +
388 +
473 473  )))
474 474  
475 475  (((
... ... @@ -490,8 +490,10 @@
490 490  
491 491  [[image:1653269759169-150.png||height="513" width="716"]]
492 492  
493 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=1**
494 494  
410 +(% style="color:#037691" %)**Examples: AT+DATAUP=1**
411 +
412 +
495 495  Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
496 496  
497 497  Final Payload is
... ... @@ -498,700 +498,107 @@
498 498  
499 499  (% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
500 500  
501 -1. Battery Info (2 bytes): Battery voltage
502 -1. PAYVER (1 byte): Defined by AT+PAYVER
503 -1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
504 -1. PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
505 -1. DATA: Valid value: max 6 bytes(US915 version here, Notice*!) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes
419 +1. PAYVER: Defined by AT+PAYVER
420 +1. PAYLOAD COUNT: Total how many uplinks of this sampling.
421 +1. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
422 +1. DATA: Valid value: max 8 bytes for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 8 bytes
506 506  
507 -[[image:1653269916228-732.png||height="433" width="711"]]
424 +[[image:image-20220602155039-4.png]]
508 508  
509 509  
510 -So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
427 +So totally there will be 3 uplinks for this sampling, each uplink include 8 bytes DATA
511 511  
512 -DATA1=RETURN1 Valid Value = (% style="background-color:green; color:white" %)20 20 0a 33 90 41
429 +DATA1=RETURN1 Valid Value + the first two of Valid value of RETURN10= **20 20 0a 33 90 41 02 aa**
513 513  
514 -DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10=(% style="background-color:green; color:white" %) 02 aa 05 81 0a 20
431 +DATA2=3^^rd^^ ~~ 10^^th^^ byte of Valid value of RETURN10= **05 81 0a 20 20 20 20 2d**
515 515  
516 -DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 = (% style="background-color:green; color:white" %)20 20 20 2d 30
433 +DATA3=the rest of Valid value of RETURN10= **30**
517 517  
518 -Below are the uplink payloads:
519 519  
520 -[[image:1653270130359-810.png]]
436 +(% style="color:red" %)Notice: In firmware v1.3, the Max bytes has been changed according to the max bytes in different Frequency Bands for lowest SF. As below:
521 521  
438 + ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.
522 522  
523 -(% style="color:red" %)**Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:**
440 + * For AU915/AS923 bands, if UplinkDwell time=0, max 11 bytes for each uplink.
524 524  
525 - ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
442 + * For US915 band, max 11 bytes for each uplink.
526 526  
527 - * For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
444 + ~* For all other bands: max 51 bytes for each uplink.
528 528  
529 - * For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
530 530  
531 - ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
447 +Below are the uplink payloads:
532 532  
449 +[[image:1654157178836-407.png]]
450 +
451 +
533 533  === 3.3.5 Uplink on demand ===
534 534  
535 -Except uplink periodically, RS485-BL is able to uplink on demand. The server sends downlink command to RS485-BL and RS485 will uplink data base on the command.
454 +Except uplink periodically, RS485-LN is able to uplink on demand. The server send downlink command to RS485-LN and RS485 will uplink data base on the command.
536 536  
537 537  Downlink control command:
538 538  
539 -[[0x08 command>>path:#downlink_08]]: Poll an uplink with current command set in RS485-BL.
458 +**0x08 command**: Poll an uplink with current command set in RS485-LN.
540 540  
541 -[[0xA8 command>>path:#downlink_A8]]: Send a command to RS485-BL and uplink the output from sensors.
460 +**0xA8 command**: Send a command to RS485-LN and uplink the output from sensors.
542 542  
543 543  
544 544  
545 -1.
546 -11.
547 -111. Uplink on Interrupt
464 +=== 3.3.6 Uplink on Interrupt ===
548 548  
549 -Put the interrupt sensor between 3.3v_out and GPIO ext.[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]]
466 +RS485-LN support external Interrupt uplink since hardware v1.2 release.
550 550  
551 -AT+INTMOD=0  Disable Interrupt
468 +[[image:1654157342174-798.png]]
552 552  
553 -AT+INTMOD=1  Interrupt trigger by rising or falling edge.
470 +Connect the Interrupt pin to RS485-LN INT port and connect the GND pin to V- port. When there is a high voltage (Max 24v) on INT pin. Device will send an uplink packet.
554 554  
555 -AT+INTMOD=2  Interrupt trigger by falling edge. ( Default Value)
556 556  
557 -AT+INTMOD=3  Interrupt trigger by rising edge.
473 +== 3.4 Uplink Payload ==
558 558  
559 -
560 -1.
561 -11. Uplink Payload
562 -
563 -|**Size(bytes)**|**2**|**1**|**Length depends on the return from the commands**
564 -|Value|(((
475 +(% border="1" style="background-color:#4bacc6; color:white; width:734px" %)
476 +|**Size(bytes)**|(% style="width:120px" %)**2**|(% style="width:116px" %)**1**|(% style="width:386px" %)**Length depends on the return from the commands**
477 +|Value|(% style="width:120px" %)(((
565 565  Battery(mV)
566 566  
567 567  &
568 568  
569 569  Interrupt _Flag
570 -)))|(((
483 +)))|(% style="width:116px" %)(((
571 571  PAYLOAD_VER
572 572  
573 573  
574 -)))|If the valid payload is too long and exceed the maximum support payload length in server, server will show payload not provided in the LoRaWAN server.
487 +)))|(% style="width:386px" %)If the valid payload is too long and exceed the maximum support payload length in server, server will show payload not provided in the LoRaWAN server.
575 575  
576 576  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
577 577  
578 578  
579 -function Decoder(bytes, port) {
492 +== 3.5 Configure RS485-BL via AT or Downlink ==
580 580  
581 -~/~/Payload Formats of RS485-BL Deceive
494 +User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
582 582  
583 -return {
584 -
585 - ~/~/Battery,units:V
586 -
587 - BatV:((bytes[0]<<8 | bytes[1])&0x7fff)/1000,
588 -
589 - ~/~/GPIO_EXTI 
590 -
591 - EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",
592 -
593 - ~/~/payload of version
594 -
595 - Pay_ver:bytes[2],
596 -
597 - };
598 -
599 - }
600 -
601 -
602 -
603 -
604 -
605 -
606 -
607 -TTN V3 uplink screen shot.
608 -
609 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
610 -
611 -1.
612 -11. Configure RS485-BL via AT or Downlink
613 -
614 -User can configure RS485-BL via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
615 -
616 616  There are two kinds of Commands:
617 617  
618 -* **Common Commands**: They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
498 +* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
619 619  
620 -* **Sensor Related Commands**: These commands are special designed for RS485-BL.  User can see these commands below:
500 +* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-LN.  User can see these commands below:
621 621  
622 -1.
623 -11.
624 -111. Common Commands:
625 625  
626 -They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands>>url:http://wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands]]
503 +=== 3.5.1 Common Commands ===
627 627  
505 +They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
628 628  
629 -1.
630 -11.
631 -111. Sensor related commands:
632 632  
633 -==== Choose Device Type (RS485 or TTL) ====
508 +=== 3.5.2 Sensor related commands ===
634 634  
635 -RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
510 +Response feature is added to the server's downlink, a special package with a FPort of 200 will be uploaded immediately after receiving the data sent by the server.
636 636  
637 -* AT Command
512 +[[image:image-20220602163333-5.png||height="263" width="1160"]]
638 638  
639 -**AT+MOD=1** ~/~/ Set to support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
514 +The first byte of this package represents whether the configuration is successful, 00 represents failure, 01 represents success. Except for the first byte, the other is the previous downlink. (All commands except A8 type commands are applicable)
640 640  
641 -**AT+MOD=2** ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
642 642  
517 +3.5.3 Sensor related commands
643 643  
644 -* Downlink Payload
519 +(% class="wikigeneratedid" %)
520 +==== ====
645 645  
646 -**0A aa**     à same as AT+MOD=aa
647 -
648 -
649 -
650 -==== [[RS485 Debug Command>>path:#downlink_A8]] (AT+CFGDEV) ====
651 -
652 -This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
653 -
654 -* AT Command
655 -
656 -AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
657 -
658 -m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
659 -
660 -
661 -
662 -* Downlink Payload
663 -
664 -Format: A8 MM NN XX XX XX XX YY
665 -
666 -Where:
667 -
668 -* MM: 1: add CRC-16/MODBUS ; 0: no CRC
669 -* NN: The length of RS485 command
670 -* XX XX XX XX: RS485 command total NN bytes
671 -* YY: How many bytes will be uplink from the return of this RS485 command, if YY=0, RS485-BL will execute the downlink command without uplink; if YY>0, RS485-BL will uplink total YY bytes from the output of this RS485 command
672 -
673 -**Example 1:**
674 -
675 -To connect a Modbus Alarm with below commands.
676 -
677 -* The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.
678 -
679 -* The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.
680 -
681 -So if user want to use downlink command to control to RS485 Alarm, he can use:
682 -
683 -**A8 01 06 0A 05 00 04 00 01 00**: to activate the RS485 Alarm
684 -
685 -**A8 01 06 0A 05 00 04 00 00 00**: to deactivate the RS485 Alarm
686 -
687 -A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.
688 -
689 -
690 -**Example 2:**
691 -
692 -Check TTL Sensor return:
693 -
694 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
695 -
696 -
697 -
698 -
699 -==== Set Payload version ====
700 -
701 -This is the first byte of the uplink payload. RS485-BL can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
702 -
703 -* AT Command:
704 -
705 -AT+PAYVER: Set PAYVER field = 1
706 -
707 -
708 -* Downlink Payload:
709 -
710 -0xAE 01   à Set PAYVER field =  0x01
711 -
712 -0xAE 0F   à Set PAYVER field =  0x0F
713 -
714 -
715 -==== Set RS485 Sampling Commands ====
716 -
717 -AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
718 -
719 -These three commands are used to configure how the RS485-BL polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>path:#polling_485]].
720 -
721 -
722 -* AT Command:
723 -
724 -AT+COMMANDx: Configure RS485 read command to sensor.
725 -
726 -AT+DATACUTx: Configure how to handle return from RS485 devices.
727 -
728 -AT+SEARCHx: Configure search command
729 -
730 -
731 -* Downlink Payload:
732 -
733 -0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
734 -
735 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
736 -
737 -Format: AF MM NN LL XX XX XX XX YY
738 -
739 -Where:
740 -
741 -* MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
742 -* NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
743 -* LL: The length of AT+COMMAND or AT+DATACUT command
744 -* XX XX XX XX: AT+COMMAND or AT+DATACUT command
745 -* YY: If YY=0, RS485-BL will execute the downlink command without uplink; if YY=1, RS485-BL will execute an uplink after got this command.
746 -
747 -Example:
748 -
749 -**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
750 -
751 -**AF 03 02 06 10 01 05 06 09 0A 00**: Same as AT+DATACUT3=**16**,**1**,**5+6+9+10**
752 -
753 -**AF 03 02 06 0B 02 05 07 08 0A 00**: Same as AT+DATACUT3=**11**,**2**,**5~~7+8~~10**
754 -
755 -
756 -0xAB downlink command can be used for set AT+SEARCHx
757 -
758 -Example: **AB aa 01 03 xx xx xx** (03 here means there are total 3 bytes after 03) So
759 -
760 -* AB aa 01 03 xx xx xx  same as AT+SEARCHaa=1,xx xx xx
761 -* AB aa 02 03 xx xx xx 02 yy yy(03 means there are 3 bytes after 03, they are xx xx xx;02 means there are 2 bytes after 02, they are yy yy) so the commands
762 -
763 -**AB aa 02 03 xx xx xx 02 yy yy**  same as **AT+SEARCHaa=2,xx xx xx+yy yy**
764 -
765 -
766 -==== Fast command to handle MODBUS device ====
767 -
768 -AT+MBFUN is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
769 -
770 -This command is valid since v1.3 firmware version
771 -
772 -
773 -AT+MBFUN has only two value:
774 -
775 -* AT+MBFUN=1: Enable Modbus reading. And get response base on the MODBUS return
776 -
777 -AT+MBFUN=1, device can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
778 -
779 -* AT+MBFUN=0: Disable Modbus fast reading.
780 -
781 -Example:
782 -
783 -* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
784 -* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
785 -* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
786 -
787 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]
788 -
789 -
790 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
791 -
792 -
793 -* Downlink Commands:
794 -
795 -A9 aa -à Same as AT+MBFUN=aa
796 -
797 -
798 -==== RS485 command timeout ====
799 -
800 -Some Modbus device has slow action to send replies. This command is used to configure the RS485-BL to use longer time to wait for their action.
801 -
802 -Default value: 0, range:  0 ~~ 5 seconds
803 -
804 -
805 -* AT Command:
806 -
807 -AT+CMDDLaa=hex(bb cc)
808 -
809 -Example:
810 -
811 -**AT+CMDDL1=1000** to send the open time to 1000ms
812 -
813 -
814 -* Downlink Payload:
815 -
816 -0x AA aa bb cc
817 -
818 -Same as: AT+CMDDLaa=hex(bb cc)
819 -
820 - Example:
821 -
822 - 0xAA 01 03 E8  à Same as **AT+CMDDL1=1000 ms**
823 -
824 -
825 -==== [[Uplink>>path:#downlink_A8]] payload mode ====
826 -
827 -Define to use one uplink or multiple uplinks for the sampling.
828 -
829 -The use of this command please see: [[Compose Uplink payload>>path:#DataUP]]
830 -
831 -* AT Command:
832 -
833 -AT+DATAUP=0
834 -
835 -AT+DATAUP=1
836 -
837 -
838 -* Downlink Payload:
839 -
840 -0xAD 00   à Same as AT+DATAUP=0
841 -
842 -0xAD 01   à Same as AT+DATAUP=1
843 -
844 -
845 -==== Manually trigger an Uplink ====
846 -
847 -Ask device to send an uplink immediately.
848 -
849 -* Downlink Payload:
850 -
851 -0x08 FF, RS485-BL will immediately send an uplink.
852 -
853 -
854 -==== Clear RS485 Command ====
855 -
856 -The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
857 -
858 -
859 -* AT Command:
860 -
861 -**AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
862 -
863 -Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
864 -
865 -Example screen shot after clear all RS485 commands. 
866 -
867 -
868 -
869 -The uplink screen shot is:
870 -
871 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
872 -
873 -
874 -* Downlink Payload:
875 -
876 -0x09 aa bb same as AT+CMDEAR=aa,bb
877 -
878 -
879 -==== Set Serial Communication Parameters ====
880 -
881 -Set the Rs485 serial communication parameters:
882 -
883 -* AT Command:
884 -
885 -Set Baud Rate:
886 -
887 -AT+BAUDR=9600    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
888 -
889 -
890 -Set UART parity
891 -
892 -AT+PARITY=0    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
893 -
894 -
895 -Set STOPBIT
896 -
897 -AT+STOPBIT=0    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
898 -
899 -
900 -* Downlink Payload:
901 -
902 -A7 01 aa bb: Same  AT+BAUDR=hex(aa bb)*100
903 -
904 -Example:
905 -
906 -* A7 01 00 60   same as AT+BAUDR=9600
907 -* A7 01 04 80  same as AT+BAUDR=115200
908 -
909 -A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
910 -
911 -A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
912 -
913 -
914 -==== Control output power duration ====
915 -
916 -User can set the output power duration before each sampling.
917 -
918 -* AT Command:
919 -
920 -Example:
921 -
922 -AT+3V3T=1000 ~/~/ 3V3 output power will open 1s before each sampling.
923 -
924 -AT+5VT=1000 ~/~/ +5V output power will open 1s before each sampling.
925 -
926 -
927 -* LoRaWAN Downlink Command:
928 -
929 -07 01 aa bb  Same as AT+5VT=(aa bb)
930 -
931 -07 02 aa bb  Same as AT+3V3T=(aa bb)
932 -
933 -
934 -
935 -
936 -1.
937 -11. Buttons
938 -
939 -|**Button**|**Feature**
940 -|**RST**|Reboot RS485-BL
941 -
942 -1.
943 -11. +3V3 Output
944 -
945 -RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
946 -
947 -The +3V3 output will be valid for every sampling. RS485-BL will enable +3V3 output before all sampling and disable the +3V3 after all sampling. 
948 -
949 -
950 -The +3V3 output time can be controlled by AT Command.
951 -
952 -**AT+3V3T=1000**
953 -
954 -Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
955 -
956 -
957 -By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
958 -
959 -
960 -1.
961 -11. +5V Output
962 -
963 -RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
964 -
965 -The +5V output will be valid for every sampling. RS485-BL will enable +5V output before all sampling and disable the +5v after all sampling. 
966 -
967 -
968 -The 5V output time can be controlled by AT Command.
969 -
970 -**AT+5VT=1000**
971 -
972 -Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
973 -
974 -
975 -By default, the AT+5VT=0. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.
976 -
977 -
978 -
979 -
980 -1.
981 -11. LEDs
982 -
983 -|**LEDs**|**Feature**
984 -|**LED1**|Blink when device transmit a packet.
985 -
986 -1.
987 -11. Switch Jumper
988 -
989 -|**Switch Jumper**|**Feature**
990 -|**SW1**|(((
991 -ISP position: Upgrade firmware via UART
992 -
993 -Flash position: Configure device, check running status.
994 -)))
995 -|**SW2**|(((
996 -5V position: set to compatible with 5v I/O.
997 -
998 -3.3v position: set to compatible with 3.3v I/O.,
999 -)))
1000 -
1001 -+3.3V: is always ON
1002 -
1003 -+5V: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1004 -
1005 -1. Case Study
1006 -
1007 -User can check this URL for some case studies.
1008 -
1009 -[[http:~~/~~/wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS>>url:http://wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS]]
1010 -
1011 -
1012 -
1013 -
1014 -1. Use AT Command
1015 -11. Access AT Command
1016 -
1017 -RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
1018 -
1019 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1020 -
1021 -
1022 -In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
1023 -
1024 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1025 -
1026 -
1027 -
1028 -More detail AT Command manual can be found at [[AT Command Manual>>path:#AT_COMMAND]]
1029 -
1030 -
1031 -
1032 -1.
1033 -11. Common AT Command Sequence
1034 -111. Multi-channel ABP mode (Use with SX1301/LG308)
1035 -
1036 -If device has not joined network yet:
1037 -
1038 -AT+FDR
1039 -
1040 -AT+NJM=0
1041 -
1042 -ATZ
1043 -
1044 -
1045 -If device already joined network:
1046 -
1047 -AT+NJM=0
1048 -
1049 -ATZ
1050 -
1051 -1.
1052 -11.
1053 -111. Single-channel ABP mode (Use with LG01/LG02)
1054 -
1055 -AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1056 -
1057 -AT+NJM=0 Set to ABP mode
1058 -
1059 -AT+ADR=0 Set the Adaptive Data Rate Off
1060 -
1061 -AT+DR=5  Set Data Rate
1062 -
1063 -AT+TDC=60000  Set transmit interval to 60 seconds
1064 -
1065 -AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1066 -
1067 -AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1068 -
1069 -AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1070 -
1071 -AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1072 -
1073 -ATZ          Reset MCU
1074 -
1075 -**Note:**
1076 -
1077 -1. Make sure the device is set to ABP mode in the IoT Server.
1078 -1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1079 -1. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1080 -1. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1081 -
1082 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1083 -
1084 -
1085 -1. FAQ
1086 -11. How to upgrade the image?
1087 -
1088 -The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1089 -
1090 -* Support new features
1091 -* For bug fix
1092 -* Change LoRaWAN bands.
1093 -
1094 -Below shows the hardware connection for how to upload an image to RS485-BL:
1095 -
1096 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1097 -
1098 -**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1099 -
1100 -**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1101 -
1102 -**Step3: **Open flashloader; choose the correct COM port to update.
1103 -
1104 -
1105 -|(((
1106 -HOLD PRO then press the RST button, SYS will be ON, then click next
1107 -)))
1108 -
1109 -|(((
1110 -Board detected
1111 -)))
1112 -
1113 -|(((
1114 -
1115 -)))
1116 -
1117 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]]
1118 -
1119 -
1120 -
1121 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]]
1122 -
1123 -
1124 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]
1125 -
1126 -
1127 -1.
1128 -11. How to change the LoRa Frequency Bands/Region?
1129 -
1130 -User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1131 -
1132 -
1133 -
1134 -1.
1135 -11. How many RS485-Slave can RS485-BL connects?
1136 -
1137 -The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>path:#downlink_A8]].
1138 -
1139 -
1140 -
1141 -
1142 -1. Trouble Shooting     
1143 -11. Downlink doesn’t work, how to solve it?
1144 -
1145 -Please see this link for debug:
1146 -
1147 -[[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug>>url:http://wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug]] 
1148 -
1149 -
1150 -
1151 -1.
1152 -11. Why I can’t join TTN V3 in US915 /AU915 bands?
1153 -
1154 -It might about the channels mapping. Please see for detail.
1155 -
1156 -[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1157 -
1158 -
1159 -
1160 -1. Order Info
1161 -
1162 -**Part Number: RS485-BL-XXX**
1163 -
1164 -**XXX:**
1165 -
1166 -* **EU433**: frequency bands EU433
1167 -* **EU868**: frequency bands EU868
1168 -* **KR920**: frequency bands KR920
1169 -* **CN470**: frequency bands CN470
1170 -* **AS923**: frequency bands AS923
1171 -* **AU915**: frequency bands AU915
1172 -* **US915**: frequency bands US915
1173 -* **IN865**: frequency bands IN865
1174 -* **RU864**: frequency bands RU864
1175 -* **KZ865: **frequency bands KZ865
1176 -
1177 -1. Packing Info
1178 -
1179 -**Package Includes**:
1180 -
1181 -* RS485-BL x 1
1182 -* Stick Antenna for LoRa RF part x 1
1183 -* Program cable x 1
1184 -
1185 -**Dimension and weight**:
1186 -
1187 -* Device Size: 13.5 x 7 x 3 cm
1188 -* Device Weight: 105g
1189 -* Package Size / pcs : 14.5 x 8 x 5 cm
1190 -* Weight / pcs : 170g
1191 -
1192 -1. Support
1193 -
1194 -* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1195 -* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1196 -
1197 -[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
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