Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 32.5 >
edited by Xiaoling
on 2022/06/02 15:25
To version < 41.1 >
edited by Xiaoling
on 2022/06/02 16:35
>
Change comment: There is no comment for this version

Summary

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... ... @@ -41,6 +41,7 @@
41 41  
42 42  == 1.2 Specifications ==
43 43  
44 +
44 44  **Hardware System:**
45 45  
46 46  * STM32L072CZT6 MCU
... ... @@ -99,6 +99,7 @@
99 99  
100 100  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
101 101  
103 +
102 102  == 1.6 Hardware Change log ==
103 103  
104 104  (((
... ... @@ -106,6 +106,8 @@
106 106  v1.2: Add External Interrupt Pin.
107 107  
108 108  v1.0: Release
111 +
112 +
109 109  )))
110 110  )))
111 111  
... ... @@ -122,6 +122,8 @@
122 122  )))
123 123  
124 124  [[image:1653268091319-405.png]]
129 +
130 +
125 125  )))
126 126  
127 127  = 3. Operation Mode =
... ... @@ -130,6 +130,8 @@
130 130  
131 131  (((
132 132  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 +
133 133  )))
134 134  
135 135  == 3.2 Example to join LoRaWAN network ==
... ... @@ -138,10 +138,15 @@
138 138  
139 139  [[image:1653268155545-638.png||height="334" width="724"]]
140 140  
149 +
141 141  (((
151 +(((
142 142  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 +)))
143 143  
155 +(((
144 144  485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
157 +)))
145 145  
146 146  [[image:1653268227651-549.png||height="592" width="720"]]
147 147  
... ... @@ -193,6 +193,7 @@
193 193  
194 194  [[image:1652953568895-172.png||height="232" width="724"]]
195 195  
209 +
196 196  == 3.3 Configure Commands to read data ==
197 197  
198 198  (((
... ... @@ -202,6 +202,8 @@
202 202  
203 203  (((
204 204  (% 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 +
205 205  )))
206 206  )))
207 207  
... ... @@ -209,19 +209,19 @@
209 209  
210 210  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:
211 211  
212 -(% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
213 -|(((
228 +(% border="1" style="background-color:#ffffcc; color:green; width:782px" %)
229 +|(% style="width:128px" %)(((
214 214  **AT Commands**
215 -)))|(% style="width:285px" %)(((
231 +)))|(% style="width:305px" %)(((
216 216  **Description**
217 -)))|(% style="width:347px" %)(((
233 +)))|(% style="width:346px" %)(((
218 218  **Example**
219 219  )))
220 -|(((
236 +|(% style="width:128px" %)(((
221 221  AT+BAUDR
222 -)))|(% style="width:285px" %)(((
238 +)))|(% style="width:305px" %)(((
223 223  Set the baud rate (for RS485 connection). Default Value is: 9600.
224 -)))|(% style="width:347px" %)(((
240 +)))|(% style="width:346px" %)(((
225 225  (((
226 226  AT+BAUDR=9600
227 227  )))
... ... @@ -230,11 +230,11 @@
230 230  Options: (1200,2400,4800,14400,19200,115200)
231 231  )))
232 232  )))
233 -|(((
249 +|(% style="width:128px" %)(((
234 234  AT+PARITY
235 -)))|(% style="width:285px" %)(((
251 +)))|(% style="width:305px" %)(((
236 236  Set UART parity (for RS485 connection)
237 -)))|(% style="width:347px" %)(((
253 +)))|(% style="width:346px" %)(((
238 238  (((
239 239  AT+PARITY=0
240 240  )))
... ... @@ -243,9 +243,9 @@
243 243  Option: 0: no parity, 1: odd parity, 2: even parity
244 244  )))
245 245  )))
246 -|(((
262 +|(% style="width:128px" %)(((
247 247  AT+STOPBIT
248 -)))|(% style="width:285px" %)(((
264 +)))|(% style="width:305px" %)(((
249 249  (((
250 250  Set serial stopbit (for RS485 connection)
251 251  )))
... ... @@ -253,7 +253,7 @@
253 253  (((
254 254  
255 255  )))
256 -)))|(% style="width:347px" %)(((
272 +)))|(% style="width:346px" %)(((
257 257  (((
258 258  AT+STOPBIT=0 for 1bit
259 259  )))
... ... @@ -288,77 +288,34 @@
288 288  === 3.3.3 Configure read commands for each sampling ===
289 289  
290 290  (((
291 -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.
292 -)))
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.
293 293  
294 -(((
295 -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.
296 -)))
297 -
298 -(((
299 299  To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
300 -)))
301 301  
302 -(((
303 303  This section describes how to achieve above goals.
304 -)))
305 305  
306 -(((
307 -During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
308 -)))
313 +During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
309 309  
310 -(((
311 -**Command from RS485-BL to Sensor:**
312 -)))
313 313  
314 -(((
315 -RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
316 -)))
316 +**Each RS485 commands include two parts:**
317 317  
318 -(((
319 -**Handle return from sensors to RS485-BL**:
320 -)))
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.
321 321  
322 -(((
323 -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**
324 -)))
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.
325 325  
326 -* (((
327 -**AT+DATACUT**
328 -)))
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
329 329  
330 -(((
331 -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.
332 -)))
333 333  
334 -* (((
335 -**AT+SEARCH**
336 -)))
337 -
338 -(((
339 -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.
340 -)))
341 -
342 -(((
343 -**Define wait timeout:**
344 -)))
345 -
346 -(((
347 -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
348 -)))
349 -
350 -(((
351 351  After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
352 -)))
353 353  
354 -**Examples:**
355 355  
356 356  Below are examples for the how above AT Commands works.
357 357  
358 -**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
359 359  
360 -(% border="1" class="table-bordered" %)
361 -|(((
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" %)(((
362 362  **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
363 363  
364 364  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
... ... @@ -366,49 +366,15 @@
366 366  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
367 367  )))
368 368  
369 -(((
370 370  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.
371 -)))
372 372  
373 -(((
374 -In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
375 -)))
344 +In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
376 376  
377 -(((
378 -**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
379 -)))
380 380  
381 -(% border="1" class="table-bordered" %)
382 -|(((
383 -**AT+SEARCHx=aa,xx xx xx xx xx**
384 -
385 -* **aa: 1: prefix match mode; 2: prefix and suffix match mode**
386 -* **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
387 -
388 -
389 -)))
390 -
391 -**Examples:**
392 -
393 -~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
394 -
395 -If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
396 -
397 -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**
398 -
399 -[[image:1653269403619-508.png]]
400 -
401 -2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
402 -
403 -If we set AT+SEARCH1=2, 1E 56 34+31 00 49
404 -
405 -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**
406 -
407 -[[image:1653269438444-278.png]]
408 -
409 409  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
410 410  
411 -|(((
349 +(% border="1" style="background-color:#4bacc6; color:white; width:725px" %)
350 +|(% style="width:722px" %)(((
412 412  **AT+DATACUTx=a,b,c**
413 413  
414 414  * **a: length for the return of AT+COMMAND**
... ... @@ -416,48 +416,37 @@
416 416  * **c: define the position for valid value.  **
417 417  )))
418 418  
419 -Examples:
358 +**Examples:**
420 420  
421 421  * Grab bytes:
422 422  
423 -[[image:1653269551753-223.png||height="311" width="717"]]
362 +[[image:image-20220602153621-1.png]]
424 424  
364 +
425 425  * Grab a section.
426 426  
427 -[[image:1653269568276-930.png||height="325" width="718"]]
367 +[[image:image-20220602153621-2.png]]
428 428  
369 +
429 429  * Grab different sections.
430 430  
431 -[[image:1653269593172-426.png||height="303" width="725"]]
372 +[[image:image-20220602153621-3.png]]
432 432  
433 -(% style="color:red" %)**Note:**
374 +
375 +)))
434 434  
435 -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.
436 -
437 -Example:
438 -
439 -(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
440 -
441 -(% style="color:red" %)AT+SEARCH1=1,1E 56 34
442 -
443 -(% style="color:red" %)AT+DATACUT1=0,2,1~~5
444 -
445 -(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
446 -
447 -(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
448 -
449 -(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
450 -
451 -[[image:1653269618463-608.png]]
452 -
453 453  === 3.3.4 Compose the uplink payload ===
454 454  
455 455  (((
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.**
381 +
382 +
457 457  )))
458 458  
459 459  (((
460 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
386 +(% style="color:#037691" %)**Examples: AT+DATAUP=0**
387 +
388 +
461 461  )))
462 462  
463 463  (((
... ... @@ -478,8 +478,10 @@
478 478  
479 479  [[image:1653269759169-150.png||height="513" width="716"]]
480 480  
481 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=1**
482 482  
410 +(% style="color:#037691" %)**Examples: AT+DATAUP=1**
411 +
412 +
483 483  Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
484 484  
485 485  Final Payload is
... ... @@ -486,700 +486,107 @@
486 486  
487 487  (% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
488 488  
489 -1. Battery Info (2 bytes): Battery voltage
490 -1. PAYVER (1 byte): Defined by AT+PAYVER
491 -1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
492 -1. PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
493 -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
494 494  
495 -[[image:1653269916228-732.png||height="433" width="711"]]
424 +[[image:image-20220602155039-4.png]]
496 496  
497 497  
498 -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
499 499  
500 -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**
501 501  
502 -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**
503 503  
504 -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**
505 505  
506 -Below are the uplink payloads:
507 507  
508 -[[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:
509 509  
438 + ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.
510 510  
511 -(% 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.
512 512  
513 - ~* 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.
514 514  
515 - * 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.
516 516  
517 - * For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
518 518  
519 - ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
447 +Below are the uplink payloads:
520 520  
449 +[[image:1654157178836-407.png]]
450 +
451 +
521 521  === 3.3.5 Uplink on demand ===
522 522  
523 -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.
524 524  
525 525  Downlink control command:
526 526  
527 -[[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.
528 528  
529 -[[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.
530 530  
531 531  
532 532  
533 -1.
534 -11.
535 -111. Uplink on Interrupt
464 +=== 3.3.6 Uplink on Interrupt ===
536 536  
537 -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.
538 538  
539 -AT+INTMOD=0  Disable Interrupt
468 +[[image:1654157342174-798.png]]
540 540  
541 -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.
542 542  
543 -AT+INTMOD=2  Interrupt trigger by falling edge. ( Default Value)
544 544  
545 -AT+INTMOD=3  Interrupt trigger by rising edge.
473 +== 3.4 Uplink Payload ==
546 546  
547 -
548 -1.
549 -11. Uplink Payload
550 -
551 -|**Size(bytes)**|**2**|**1**|**Length depends on the return from the commands**
552 -|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" %)(((
553 553  Battery(mV)
554 554  
555 555  &
556 556  
557 557  Interrupt _Flag
558 -)))|(((
483 +)))|(% style="width:116px" %)(((
559 559  PAYLOAD_VER
560 560  
561 561  
562 -)))|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.
563 563  
564 564  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
565 565  
566 566  
567 -function Decoder(bytes, port) {
492 +== 3.5 Configure RS485-BL via AT or Downlink ==
568 568  
569 -~/~/Payload Formats of RS485-BL Deceive
494 +User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
570 570  
571 -return {
572 -
573 - ~/~/Battery,units:V
574 -
575 - BatV:((bytes[0]<<8 | bytes[1])&0x7fff)/1000,
576 -
577 - ~/~/GPIO_EXTI 
578 -
579 - EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",
580 -
581 - ~/~/payload of version
582 -
583 - Pay_ver:bytes[2],
584 -
585 - };
586 -
587 - }
588 -
589 -
590 -
591 -
592 -
593 -
594 -
595 -TTN V3 uplink screen shot.
596 -
597 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
598 -
599 -1.
600 -11. Configure RS485-BL via AT or Downlink
601 -
602 -User can configure RS485-BL via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
603 -
604 604  There are two kinds of Commands:
605 605  
606 -* **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]]
607 607  
608 -* **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:
609 609  
610 -1.
611 -11.
612 -111. Common Commands:
613 613  
614 -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 ===
615 615  
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]]
616 616  
617 -1.
618 -11.
619 -111. Sensor related commands:
620 620  
621 -==== Choose Device Type (RS485 or TTL) ====
508 +=== 3.5.2 Sensor related commands ===
622 622  
623 -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.
624 624  
625 -* AT Command
512 +[[image:image-20220602163333-5.png||height="263" width="1160"]]
626 626  
627 -**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)
628 628  
629 -**AT+MOD=2** ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
630 630  
517 +3.5.3 Sensor related commands
631 631  
632 -* Downlink Payload
519 +(% class="wikigeneratedid" %)
520 +==== ====
633 633  
634 -**0A aa**     à same as AT+MOD=aa
635 -
636 -
637 -
638 -==== [[RS485 Debug Command>>path:#downlink_A8]] (AT+CFGDEV) ====
639 -
640 -This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
641 -
642 -* AT Command
643 -
644 -AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
645 -
646 -m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
647 -
648 -
649 -
650 -* Downlink Payload
651 -
652 -Format: A8 MM NN XX XX XX XX YY
653 -
654 -Where:
655 -
656 -* MM: 1: add CRC-16/MODBUS ; 0: no CRC
657 -* NN: The length of RS485 command
658 -* XX XX XX XX: RS485 command total NN bytes
659 -* 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
660 -
661 -**Example 1:**
662 -
663 -To connect a Modbus Alarm with below commands.
664 -
665 -* 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.
666 -
667 -* 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.
668 -
669 -So if user want to use downlink command to control to RS485 Alarm, he can use:
670 -
671 -**A8 01 06 0A 05 00 04 00 01 00**: to activate the RS485 Alarm
672 -
673 -**A8 01 06 0A 05 00 04 00 00 00**: to deactivate the RS485 Alarm
674 -
675 -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.
676 -
677 -
678 -**Example 2:**
679 -
680 -Check TTL Sensor return:
681 -
682 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
683 -
684 -
685 -
686 -
687 -==== Set Payload version ====
688 -
689 -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.
690 -
691 -* AT Command:
692 -
693 -AT+PAYVER: Set PAYVER field = 1
694 -
695 -
696 -* Downlink Payload:
697 -
698 -0xAE 01   à Set PAYVER field =  0x01
699 -
700 -0xAE 0F   à Set PAYVER field =  0x0F
701 -
702 -
703 -==== Set RS485 Sampling Commands ====
704 -
705 -AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
706 -
707 -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]].
708 -
709 -
710 -* AT Command:
711 -
712 -AT+COMMANDx: Configure RS485 read command to sensor.
713 -
714 -AT+DATACUTx: Configure how to handle return from RS485 devices.
715 -
716 -AT+SEARCHx: Configure search command
717 -
718 -
719 -* Downlink Payload:
720 -
721 -0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
722 -
723 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
724 -
725 -Format: AF MM NN LL XX XX XX XX YY
726 -
727 -Where:
728 -
729 -* MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
730 -* NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
731 -* LL: The length of AT+COMMAND or AT+DATACUT command
732 -* XX XX XX XX: AT+COMMAND or AT+DATACUT command
733 -* 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.
734 -
735 -Example:
736 -
737 -**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
738 -
739 -**AF 03 02 06 10 01 05 06 09 0A 00**: Same as AT+DATACUT3=**16**,**1**,**5+6+9+10**
740 -
741 -**AF 03 02 06 0B 02 05 07 08 0A 00**: Same as AT+DATACUT3=**11**,**2**,**5~~7+8~~10**
742 -
743 -
744 -0xAB downlink command can be used for set AT+SEARCHx
745 -
746 -Example: **AB aa 01 03 xx xx xx** (03 here means there are total 3 bytes after 03) So
747 -
748 -* AB aa 01 03 xx xx xx  same as AT+SEARCHaa=1,xx xx xx
749 -* 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
750 -
751 -**AB aa 02 03 xx xx xx 02 yy yy**  same as **AT+SEARCHaa=2,xx xx xx+yy yy**
752 -
753 -
754 -==== Fast command to handle MODBUS device ====
755 -
756 -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]].
757 -
758 -This command is valid since v1.3 firmware version
759 -
760 -
761 -AT+MBFUN has only two value:
762 -
763 -* AT+MBFUN=1: Enable Modbus reading. And get response base on the MODBUS return
764 -
765 -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.
766 -
767 -* AT+MBFUN=0: Disable Modbus fast reading.
768 -
769 -Example:
770 -
771 -* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
772 -* 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.
773 -* 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.
774 -
775 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]
776 -
777 -
778 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
779 -
780 -
781 -* Downlink Commands:
782 -
783 -A9 aa -à Same as AT+MBFUN=aa
784 -
785 -
786 -==== RS485 command timeout ====
787 -
788 -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.
789 -
790 -Default value: 0, range:  0 ~~ 5 seconds
791 -
792 -
793 -* AT Command:
794 -
795 -AT+CMDDLaa=hex(bb cc)
796 -
797 -Example:
798 -
799 -**AT+CMDDL1=1000** to send the open time to 1000ms
800 -
801 -
802 -* Downlink Payload:
803 -
804 -0x AA aa bb cc
805 -
806 -Same as: AT+CMDDLaa=hex(bb cc)
807 -
808 - Example:
809 -
810 - 0xAA 01 03 E8  à Same as **AT+CMDDL1=1000 ms**
811 -
812 -
813 -==== [[Uplink>>path:#downlink_A8]] payload mode ====
814 -
815 -Define to use one uplink or multiple uplinks for the sampling.
816 -
817 -The use of this command please see: [[Compose Uplink payload>>path:#DataUP]]
818 -
819 -* AT Command:
820 -
821 -AT+DATAUP=0
822 -
823 -AT+DATAUP=1
824 -
825 -
826 -* Downlink Payload:
827 -
828 -0xAD 00   à Same as AT+DATAUP=0
829 -
830 -0xAD 01   à Same as AT+DATAUP=1
831 -
832 -
833 -==== Manually trigger an Uplink ====
834 -
835 -Ask device to send an uplink immediately.
836 -
837 -* Downlink Payload:
838 -
839 -0x08 FF, RS485-BL will immediately send an uplink.
840 -
841 -
842 -==== Clear RS485 Command ====
843 -
844 -The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
845 -
846 -
847 -* AT Command:
848 -
849 -**AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
850 -
851 -Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
852 -
853 -Example screen shot after clear all RS485 commands. 
854 -
855 -
856 -
857 -The uplink screen shot is:
858 -
859 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
860 -
861 -
862 -* Downlink Payload:
863 -
864 -0x09 aa bb same as AT+CMDEAR=aa,bb
865 -
866 -
867 -==== Set Serial Communication Parameters ====
868 -
869 -Set the Rs485 serial communication parameters:
870 -
871 -* AT Command:
872 -
873 -Set Baud Rate:
874 -
875 -AT+BAUDR=9600    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
876 -
877 -
878 -Set UART parity
879 -
880 -AT+PARITY=0    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
881 -
882 -
883 -Set STOPBIT
884 -
885 -AT+STOPBIT=0    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
886 -
887 -
888 -* Downlink Payload:
889 -
890 -A7 01 aa bb: Same  AT+BAUDR=hex(aa bb)*100
891 -
892 -Example:
893 -
894 -* A7 01 00 60   same as AT+BAUDR=9600
895 -* A7 01 04 80  same as AT+BAUDR=115200
896 -
897 -A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
898 -
899 -A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
900 -
901 -
902 -==== Control output power duration ====
903 -
904 -User can set the output power duration before each sampling.
905 -
906 -* AT Command:
907 -
908 -Example:
909 -
910 -AT+3V3T=1000 ~/~/ 3V3 output power will open 1s before each sampling.
911 -
912 -AT+5VT=1000 ~/~/ +5V output power will open 1s before each sampling.
913 -
914 -
915 -* LoRaWAN Downlink Command:
916 -
917 -07 01 aa bb  Same as AT+5VT=(aa bb)
918 -
919 -07 02 aa bb  Same as AT+3V3T=(aa bb)
920 -
921 -
922 -
923 -
924 -1.
925 -11. Buttons
926 -
927 -|**Button**|**Feature**
928 -|**RST**|Reboot RS485-BL
929 -
930 -1.
931 -11. +3V3 Output
932 -
933 -RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
934 -
935 -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. 
936 -
937 -
938 -The +3V3 output time can be controlled by AT Command.
939 -
940 -**AT+3V3T=1000**
941 -
942 -Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
943 -
944 -
945 -By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
946 -
947 -
948 -1.
949 -11. +5V Output
950 -
951 -RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
952 -
953 -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. 
954 -
955 -
956 -The 5V output time can be controlled by AT Command.
957 -
958 -**AT+5VT=1000**
959 -
960 -Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
961 -
962 -
963 -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.
964 -
965 -
966 -
967 -
968 -1.
969 -11. LEDs
970 -
971 -|**LEDs**|**Feature**
972 -|**LED1**|Blink when device transmit a packet.
973 -
974 -1.
975 -11. Switch Jumper
976 -
977 -|**Switch Jumper**|**Feature**
978 -|**SW1**|(((
979 -ISP position: Upgrade firmware via UART
980 -
981 -Flash position: Configure device, check running status.
982 -)))
983 -|**SW2**|(((
984 -5V position: set to compatible with 5v I/O.
985 -
986 -3.3v position: set to compatible with 3.3v I/O.,
987 -)))
988 -
989 -+3.3V: is always ON
990 -
991 -+5V: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
992 -
993 -1. Case Study
994 -
995 -User can check this URL for some case studies.
996 -
997 -[[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]]
998 -
999 -
1000 -
1001 -
1002 -1. Use AT Command
1003 -11. Access AT Command
1004 -
1005 -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.
1006 -
1007 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1008 -
1009 -
1010 -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:
1011 -
1012 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1013 -
1014 -
1015 -
1016 -More detail AT Command manual can be found at [[AT Command Manual>>path:#AT_COMMAND]]
1017 -
1018 -
1019 -
1020 -1.
1021 -11. Common AT Command Sequence
1022 -111. Multi-channel ABP mode (Use with SX1301/LG308)
1023 -
1024 -If device has not joined network yet:
1025 -
1026 -AT+FDR
1027 -
1028 -AT+NJM=0
1029 -
1030 -ATZ
1031 -
1032 -
1033 -If device already joined network:
1034 -
1035 -AT+NJM=0
1036 -
1037 -ATZ
1038 -
1039 -1.
1040 -11.
1041 -111. Single-channel ABP mode (Use with LG01/LG02)
1042 -
1043 -AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1044 -
1045 -AT+NJM=0 Set to ABP mode
1046 -
1047 -AT+ADR=0 Set the Adaptive Data Rate Off
1048 -
1049 -AT+DR=5  Set Data Rate
1050 -
1051 -AT+TDC=60000  Set transmit interval to 60 seconds
1052 -
1053 -AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1054 -
1055 -AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1056 -
1057 -AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1058 -
1059 -AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1060 -
1061 -ATZ          Reset MCU
1062 -
1063 -**Note:**
1064 -
1065 -1. Make sure the device is set to ABP mode in the IoT Server.
1066 -1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1067 -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.
1068 -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
1069 -
1070 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1071 -
1072 -
1073 -1. FAQ
1074 -11. How to upgrade the image?
1075 -
1076 -The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1077 -
1078 -* Support new features
1079 -* For bug fix
1080 -* Change LoRaWAN bands.
1081 -
1082 -Below shows the hardware connection for how to upload an image to RS485-BL:
1083 -
1084 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1085 -
1086 -**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]].
1087 -
1088 -**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1089 -
1090 -**Step3: **Open flashloader; choose the correct COM port to update.
1091 -
1092 -
1093 -|(((
1094 -HOLD PRO then press the RST button, SYS will be ON, then click next
1095 -)))
1096 -
1097 -|(((
1098 -Board detected
1099 -)))
1100 -
1101 -|(((
1102 -
1103 -)))
1104 -
1105 -[[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]]
1106 -
1107 -
1108 -
1109 -[[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]]
1110 -
1111 -
1112 -[[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]]
1113 -
1114 -
1115 -1.
1116 -11. How to change the LoRa Frequency Bands/Region?
1117 -
1118 -User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1119 -
1120 -
1121 -
1122 -1.
1123 -11. How many RS485-Slave can RS485-BL connects?
1124 -
1125 -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]].
1126 -
1127 -
1128 -
1129 -
1130 -1. Trouble Shooting     
1131 -11. Downlink doesn’t work, how to solve it?
1132 -
1133 -Please see this link for debug:
1134 -
1135 -[[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]] 
1136 -
1137 -
1138 -
1139 -1.
1140 -11. Why I can’t join TTN V3 in US915 /AU915 bands?
1141 -
1142 -It might about the channels mapping. Please see for detail.
1143 -
1144 -[[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]]
1145 -
1146 -
1147 -
1148 -1. Order Info
1149 -
1150 -**Part Number: RS485-BL-XXX**
1151 -
1152 -**XXX:**
1153 -
1154 -* **EU433**: frequency bands EU433
1155 -* **EU868**: frequency bands EU868
1156 -* **KR920**: frequency bands KR920
1157 -* **CN470**: frequency bands CN470
1158 -* **AS923**: frequency bands AS923
1159 -* **AU915**: frequency bands AU915
1160 -* **US915**: frequency bands US915
1161 -* **IN865**: frequency bands IN865
1162 -* **RU864**: frequency bands RU864
1163 -* **KZ865: **frequency bands KZ865
1164 -
1165 -1. Packing Info
1166 -
1167 -**Package Includes**:
1168 -
1169 -* RS485-BL x 1
1170 -* Stick Antenna for LoRa RF part x 1
1171 -* Program cable x 1
1172 -
1173 -**Dimension and weight**:
1174 -
1175 -* Device Size: 13.5 x 7 x 3 cm
1176 -* Device Weight: 105g
1177 -* Package Size / pcs : 14.5 x 8 x 5 cm
1178 -* Weight / pcs : 170g
1179 -
1180 -1. Support
1181 -
1182 -* 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.
1183 -* 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
1184 -
1185 -[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
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