Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 23.1 >
edited by Xiaoling
on 2022/05/23 09:30
To version < 32.2 >
edited by Xiaoling
on 2022/06/02 15:22
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... ... @@ -18,19 +18,21 @@
18 18  
19 19  (((
20 20  (((
21 -The Dragino RS485-LN is a RS485 to LoRaWAN Converter. It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
21 +The Dragino RS485-LN is a **RS485 to LoRaWAN Converter**. It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
22 22  )))
23 23  
24 24  (((
25 -RS485-LN allows user to monitor / control RS485 devices and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
25 +RS485-LN allows user to **monitor / control RS485 devices** and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
26 26  )))
27 27  
28 28  (((
29 -For data uplink, RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
29 +**For data uplink**, RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
30 30  )))
31 31  
32 32  (((
33 -For data downlink, RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
33 +**For data downlink**, RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
34 +
35 +**Demo Dashboard for RS485-LN** connect to two energy meters: [[https:~~/~~/app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a>>url:https://app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a]]
34 34  )))
35 35  )))
36 36  
... ... @@ -365,11 +365,17 @@
365 365  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
366 366  )))
367 367  
370 +(((
368 368  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.
372 +)))
369 369  
374 +(((
370 370  In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
376 +)))
371 371  
378 +(((
372 372  **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
380 +)))
373 373  
374 374  (% border="1" class="table-bordered" %)
375 375  |(((
... ... @@ -381,26 +381,24 @@
381 381  
382 382  )))
383 383  
384 -Examples:
392 +**Examples:**
385 385  
386 -1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
394 +~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
387 387  
388 388  If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
389 389  
390 -The valid data will be all bytes after 1E 56 34 , so it is 2e 30 58 5f 36 41 30 31 00 49
398 +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**
391 391  
392 -[[image:1652954654347-831.png]]
400 +[[image:1653269403619-508.png]]
393 393  
402 +2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
394 394  
395 -1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
396 -
397 397  If we set AT+SEARCH1=2, 1E 56 34+31 00 49
398 398  
399 -Device will search the bytes between 1E 56 34 and 31 00 49. So it is 2e 30 58 5f 36 41 30
406 +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**
400 400  
401 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
408 +[[image:1653269438444-278.png]]
402 402  
403 -
404 404  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
405 405  
406 406  |(((
... ... @@ -415,94 +415,95 @@
415 415  
416 416  * Grab bytes:
417 417  
418 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
424 +[[image:1653269551753-223.png||height="311" width="717"]]
419 419  
420 420  * Grab a section.
421 421  
422 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
428 +[[image:1653269568276-930.png||height="325" width="718"]]
423 423  
424 424  * Grab different sections.
425 425  
426 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
432 +[[image:1653269593172-426.png||height="303" width="725"]]
427 427  
434 +(% style="color:red" %)**Note:**
428 428  
429 -Note:
430 -
431 431  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.
432 432  
433 433  Example:
434 434  
435 -AT+COMMAND1=11 01 1E D0,0
440 +(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
436 436  
437 -AT+SEARCH1=1,1E 56 34
442 +(% style="color:red" %)AT+SEARCH1=1,1E 56 34
438 438  
439 -AT+DATACUT1=0,2,1~~5
444 +(% style="color:red" %)AT+DATACUT1=0,2,1~~5
440 440  
441 -Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
446 +(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
442 442  
443 -String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
448 +(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
444 444  
445 -Valid payload after DataCUT command: 2e 30 58 5f 36
450 +(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
446 446  
447 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
452 +[[image:1653269618463-608.png]]
448 448  
454 +=== 3.3.4 Compose the uplink payload ===
449 449  
450 -
451 -
452 -1.
453 -11.
454 -111. Compose the uplink payload
455 -
456 +(((
456 456  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.**
458 +)))
457 457  
460 +(((
461 +(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
462 +)))
458 458  
459 -**Examples: AT+DATAUP=0**
464 +(((
465 +Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
466 +)))
460 460  
461 -Compose the uplink payload with value returns in sequence and send with **A SIGNLE UPLINK**.
462 -
468 +(((
463 463  Final Payload is
470 +)))
464 464  
465 -Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx
472 +(((
473 +(% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
474 +)))
466 466  
476 +(((
467 467  Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
478 +)))
468 468  
469 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
480 +[[image:1653269759169-150.png||height="513" width="716"]]
470 470  
482 +(% style="color:#4f81bd" %)**Examples: AT+DATAUP=1**
471 471  
484 +Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
472 472  
473 -**Examples: AT+DATAUP=1**
474 -
475 -Compose the uplink payload with value returns in sequence and send with **Multiply UPLINKs**.
476 -
477 477  Final Payload is
478 478  
479 -Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA
488 +(% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
480 480  
481 481  1. Battery Info (2 bytes): Battery voltage
482 482  1. PAYVER (1 byte): Defined by AT+PAYVER
483 483  1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
484 484  1. PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
485 -1. DATA: Valid value: max 6 bytes(US915 version here, [[Notice*!>>path:#max_byte]]) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes
494 +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
486 486  
487 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
496 +[[image:1653269916228-732.png||height="433" width="711"]]
488 488  
489 489  
490 490  So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
491 491  
492 -DATA1=RETURN1 Valid Value = 20 20 0a 33 90 41
501 +DATA1=RETURN1 Valid Value = (% style="background-color:green; color:white" %)20 20 0a 33 90 41
493 493  
494 -DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10= 02 aa 05 81 0a 20
503 +DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10=(% style="background-color:green; color:white" %) 02 aa 05 81 0a 20
495 495  
496 -DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 = 20 20 20 2d 30
505 +DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 = (% style="background-color:green; color:white" %)20 20 20 2d 30
497 497  
498 -
499 -
500 500  Below are the uplink payloads:
501 501  
502 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]]
509 +[[image:1653270130359-810.png]]
503 503  
504 504  
505 -Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:
512 +(% style="color:red" %)**Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:**
506 506  
507 507   ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
508 508  
... ... @@ -512,12 +512,8 @@
512 512  
513 513   ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
514 514  
522 +=== 3.3.5 Uplink on demand ===
515 515  
516 -
517 -1.
518 -11.
519 -111. Uplink on demand
520 -
521 521  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.
522 522  
523 523  Downlink control command:
1653269438444-278.png
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