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1 (% style="text-align:center" %)
2 [[image:1652947681187-144.png||height="385" width="385"]]
3
4
5
6
7 **RS485-BL – Waterproof RS485 to LoRaWAN Converter User Manual**
8
9
10
11 **Table of Contents:**
12
13 {{toc/}}
14
15
16
17
18
19 = 1.Introduction =
20
21 == 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
22
23 (((
24
25 )))
26
27 (((
28 The Dragino RS485-BL is a (% style="color:blue" %)**RS485 / UART to LoRaWAN Converter**(%%) for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-BL converter, and configure RS485-BL to periodically read sensor data and upload via LoRaWAN network to IoT server.
29 )))
30
31 (((
32 RS485-BL can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-BL provides (% style="color:blue" %)**a 3.3v output**(%%) and** (% style="color:blue" %)a 5v output(%%)** to power external sensors. Both output voltages are controllable to minimize the total system power consumption.
33 )))
34
35 (((
36 RS485-BL is IP67 (% style="color:blue" %)**waterproof**(%%) and powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use for several years.
37 )))
38
39 (((
40 RS485-BL runs standard (% style="color:blue" %)**LoRaWAN 1.0.3 in Class A**(%%). It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server.
41 )))
42
43 (((
44 For data uplink, RS485-BL sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-BL will process these returns data according to user-define rules to get the final payload and upload to LoRaWAN server.
45 )))
46
47 (((
48 For data downlink, RS485-BL runs in LoRaWAN Class A. When there is downlink commands from LoRaWAN server, RS485-BL will forward the commands from LoRaWAN server to RS485 devices.
49 )))
50
51 (((
52 Each RS485-BL pre-load with a set of unique keys for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
53 )))
54
55 [[image:1652953304999-717.png||height="424" width="733"]]
56
57
58
59 == 1.2 Specifications ==
60
61
62 **Hardware System:**
63
64 * STM32L072CZT6 MCU
65 * SX1276/78 Wireless Chip 
66 * Power Consumption (exclude RS485 device):
67 ** Idle: 6uA@3.3v
68 ** 20dB Transmit: 130mA@3.3v
69
70 **Interface for Model:**
71
72 * 1 x RS485 Interface
73 * 1 x TTL Serial , 3.3v or 5v.
74 * 1 x I2C Interface, 3.3v or 5v.
75 * 1 x one wire interface
76 * 1 x Interrupt Interface
77 * 1 x Controllable 5V output, max
78
79 **LoRa Spec:**
80
81 * Frequency Range:
82 ** Band 1 (HF): 862 ~~ 1020 Mhz
83 ** Band 2 (LF): 410 ~~ 528 Mhz
84 * 168 dB maximum link budget.
85 * +20 dBm - 100 mW constant RF output vs.
86 * Programmable bit rate up to 300 kbps.
87 * High sensitivity: down to -148 dBm.
88 * Bullet-proof front end: IIP3 = -12.5 dBm.
89 * Excellent blocking immunity.
90 * Fully integrated synthesizer with a resolution of 61 Hz.
91 * LoRa modulation.
92 * Built-in bit synchronizer for clock recovery.
93 * Preamble detection.
94 * 127 dB Dynamic Range RSSI.
95 * Automatic RF Sense and CAD with ultra-fast AFC. ​​​
96
97 == 1.3 Features ==
98
99 * LoRaWAN Class A & Class C protocol (default Class A)
100 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
101 * AT Commands to change parameters
102 * Remote configure parameters via LoRaWAN Downlink
103 * Firmware upgradable via program port
104 * Support multiply RS485 devices by flexible rules
105 * Support Modbus protocol
106 * Support Interrupt uplink
107
108 == 1.4 Applications ==
109
110 * Smart Buildings & Home Automation
111 * Logistics and Supply Chain Management
112 * Smart Metering
113 * Smart Agriculture
114 * Smart Cities
115 * Smart Factory
116
117 == 1.5 Firmware Change log ==
118
119 [[RS485-BL Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Firmware/||style="background-color: rgb(255, 255, 255);"]]
120
121
122 == 1.6 Hardware Change log ==
123
124 (((
125
126
127 (((
128 v1.4
129 )))
130 )))
131
132 (((
133 (((
134 ~1. Change Power IC to TPS22916
135 )))
136 )))
137
138 (((
139
140 )))
141
142 (((
143 (((
144 v1.3
145 )))
146 )))
147
148 (((
149 (((
150 ~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
151 )))
152 )))
153
154 (((
155
156 )))
157
158 (((
159 (((
160 v1.2
161 )))
162 )))
163
164 (((
165 (((
166 Release version ​​​​​
167 )))
168
169
170 )))
171
172 = 2. Pin mapping and Power ON Device =
173
174 (((
175 The RS485-BL is powered on by 8500mAh battery. To save battery life, RS485-BL is shipped with power off. User can put the jumper to power on RS485-BL.
176 )))
177
178 [[image:1652953055962-143.png||height="387" width="728"]]
179
180
181 The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
182
183
184 = 3. Operation Mode =
185
186 == 3.1 How it works? ==
187
188 (((
189 The RS485-BL is configured as LoRaWAN OTAA Class A 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-BL. It will auto join the network via OTAA.
190
191
192 )))
193
194 == 3.2 Example to join LoRaWAN network ==
195
196 Here shows an example for how to join the TTN V3 Network. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
197
198 [[image:1652953414711-647.png||height="337" width="723"]]
199
200 (((
201 The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
202 )))
203
204 (((
205 The LG308 is already set to connect to [[TTN V3 network >>url:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
206 )))
207
208 (((
209 **Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-BL.
210 )))
211
212 (((
213 Each RS485-BL is shipped with a sticker with unique device EUI:
214 )))
215
216 [[image:1652953462722-299.png]]
217
218 (((
219 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
220 )))
221
222 (((
223 Add APP EUI in the application.
224 )))
225
226
227 [[image:image-20220519174512-1.png]]
228
229 [[image:image-20220519174512-2.png||height="328" width="731"]]
230
231 [[image:image-20220519174512-3.png||height="556" width="724"]]
232
233 [[image:image-20220519174512-4.png]]
234
235 You can also choose to create the device manually.
236
237 [[image:1652953542269-423.png||height="710" width="723"]]
238
239 Add APP KEY and DEV EUI
240
241 [[image:1652953553383-907.png||height="514" width="724"]]
242
243
244 (((
245 **Step 2**: Power on RS485-BL and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
246 )))
247
248 [[image:1652953568895-172.png||height="232" width="724"]]
249
250
251 == 3.3 Configure Commands to read data ==
252
253 (((
254 There are plenty of RS485 and TTL level devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-BL supports flexible command set. User can use [[AT Commands or LoRaWAN Downlink>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]] Command to configure how RS485-BL should read the sensor and how to handle the return from RS485 or TTL sensors.
255
256
257 )))
258
259 === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
260
261 (((
262 RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
263 )))
264
265 (((
266 **~1. RS485-MODBUS mode:**
267 )))
268
269 (((
270 AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
271 )))
272
273 (((
274 **2. TTL mode:**
275 )))
276
277 (((
278 AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
279 )))
280
281 (((
282 RS485-BL default UART settings is **9600, no parity, stop bit 1**. If the sensor has a different settings, user can change the RS485-BL setting to match.
283 )))
284
285 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
286 |=(% style="width: 120px;" %)(((
287 (((
288 **AT Commands**
289 )))
290 )))|=(% style="width: 190px;" %)(((
291 (((
292 **Description**
293 )))
294 )))|=(% style="width: 190px;" %)(((
295 (((
296 **Example**
297 )))
298 )))
299 |(% style="width:120px" %)(((
300 (((
301 AT+BAUDR
302 )))
303 )))|(% style="width:190px" %)(((
304 (((
305 Set the baud rate (for RS485 connection). Default Value is: 9600.
306 )))
307 )))|(% style="width:190px" %)(((
308 (((
309 (((
310 AT+BAUDR=9600
311 )))
312 )))
313
314 (((
315 (((
316 Options: (1200,2400,4800,14400,19200,115200)
317 )))
318 )))
319 )))
320 |(% style="width:120px" %)(((
321 (((
322 AT+PARITY
323 )))
324 )))|(% style="width:190px" %)(((
325 (((
326 (((
327 Set UART parity (for RS485 connection)
328 )))
329 )))
330
331 (((
332 (((
333 Default Value is: no parity.
334 )))
335 )))
336 )))|(% style="width:190px" %)(((
337 (((
338 (((
339 AT+PARITY=0
340 )))
341 )))
342
343 (((
344 (((
345 Option: 0: no parity, 1: odd parity, 2: even parity
346 )))
347 )))
348 )))
349 |(% style="width:120px" %)(((
350 (((
351 AT+STOPBIT
352 )))
353 )))|(% style="width:190px" %)(((
354 (((
355 (((
356 Set serial stopbit (for RS485 connection)
357 )))
358 )))
359
360 (((
361 (((
362 Default Value is: 1bit.
363 )))
364 )))
365 )))|(% style="width:190px" %)(((
366 (((
367 (((
368 AT+STOPBIT=0 for 1bit
369 )))
370 )))
371
372 (((
373 (((
374 AT+STOPBIT=1 for 1.5 bit
375 )))
376 )))
377
378 (((
379 (((
380 AT+STOPBIT=2 for 2 bits
381 )))
382 )))
383 )))
384
385
386
387 === 3.3.2 Configure sensors ===
388
389 (((
390 Some sensors might need to configure before normal operation. User can configure such sensor via PC or through RS485-BL AT Commands (% style="color:#4f81bd" %)**AT+CFGDEV**.
391 )))
392
393 (((
394 When user issue an (% style="color:#4f81bd" %)**AT+CFGDEV**(%%) command, Each (% style="color:#4f81bd" %)**AT+CFGDEV**(%%) equals to send a command to the RS485 or TTL sensors. This command will only run when user input it and won’t run during each sampling.
395 )))
396
397 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
398 |=(% style="width: 120px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
399 |AT+CFGDEV|(% style="width:120px" %)(((
400 This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
401
402 AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
403
404 mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
405 )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
406
407 Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>||anchor="HRS485DebugCommand28AT2BCFGDEV29"]].
408
409
410
411 === 3.3.3 Configure read commands for each sampling ===
412
413 (((
414 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.
415 )))
416
417 (((
418 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.
419 )))
420
421 (((
422 To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
423 )))
424
425 (((
426 This section describes how to achieve above goals.
427 )))
428
429 (((
430 During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
431 )))
432
433 (((
434 **Command from RS485-BL to Sensor:**
435 )))
436
437 (((
438 RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
439 )))
440
441 (((
442 **Handle return from sensors to RS485-BL**:
443 )))
444
445 (((
446 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**
447 )))
448
449 * (((
450 **AT+DATACUT**
451 )))
452
453 (((
454 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.
455 )))
456
457 * (((
458 **AT+SEARCH**
459 )))
460
461 (((
462 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.
463 )))
464
465 (((
466 **Define wait timeout:**
467 )))
468
469 (((
470 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
471 )))
472
473 (((
474 After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
475 )))
476
477 (((
478 **Examples:**
479 )))
480
481 (((
482 Below are examples for the how above AT Commands works.
483 )))
484
485 (((
486 **AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
487 )))
488
489 (% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:500px" %)
490 |(% style="width:498px" %)(((
491 (((
492 **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
493 )))
494
495 (((
496 **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
497 )))
498
499 (((
500 **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
501 )))
502 )))
503
504 (((
505 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.
506 )))
507
508 (((
509 In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
510 )))
511
512 (((
513
514 )))
515
516 (((
517 **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
518 )))
519
520 (% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:500px" %)
521 |(% style="width:577px" %)(((
522 (((
523 **AT+SEARCHx=aa,xx xx xx xx xx**
524 )))
525
526 * (((
527 **aa: 1: prefix match mode; 2: prefix and suffix match mode**
528 )))
529 * (((
530 **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
531 )))
532 )))
533
534 (((
535 **Examples:**
536 )))
537
538 (((
539 1）For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
540 )))
541
542 (((
543 If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
544 )))
545
546 (((
547 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**
548 )))
549
550 (((
551 [[image:1653271044481-711.png]]
552 )))
553
554 (((
555 2）For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
556 )))
557
558 (((
559 If we set AT+SEARCH1=2, 1E 56 34+31 00 49
560 )))
561
562 (((
563 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**
564 )))
565
566 (((
567 [[image:1653271276735-972.png]]
568 )))
569
570 (((
571 **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
572 )))
573
574 (% style="background-color:#4f81bd; color:white; width:510px" %)
575 |(% style="width:726px" %)(((
576 (((
577 **AT+DATACUTx=a,b,c**
578 )))
579
580 * (((
581 **a: length for the return of AT+COMMAND**
582 )))
583 * (((
584 **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
585 )))
586 * (((
587 **c: define the position for valid value.  **
588 )))
589 )))
590
591 (((
592 **Examples:**
593 )))
594
595 * (((
596 Grab bytes:
597 )))
598
599 (((
600 [[image:1653271581490-837.png||height="313" width="722"]]
601 )))
602
603 (((
604
605 )))
606
607 * (((
608 Grab a section.
609 )))
610
611 (((
612 [[image:1653271648378-342.png||height="326" width="720"]]
613 )))
614
615 (((
616
617 )))
618
619 * (((
620 Grab different sections.
621 )))
622
623 (((
624 [[image:1653271657255-576.png||height="305" width="730"]]
625 )))
626
627 (((
628 (((
629 (% style="color:red" %)**Note:**
630 )))
631 )))
632
633 (((
634 (((
635 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.
636 )))
637 )))
638
639 (((
640 (((
641 **Example:**
642 )))
643 )))
644
645 (((
646 (((
647 (% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
648 )))
649 )))
650
651 (((
652 (((
653 (% style="color:red" %)AT+SEARCH1=1,1E 56 34
654 )))
655 )))
656
657 (((
658 (((
659 (% style="color:red" %)AT+DATACUT1=0,2,1~~5
660 )))
661 )))
662
663 (((
664 (((
665 (% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
666 )))
667 )))
668
669 (((
670 (((
671 (% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
672 )))
673 )))
674
675 (((
676 (((
677 (% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
678 )))
679 )))
680
681 (((
682 [[image:1653271763403-806.png]]
683 )))
684
685
686 === 3.3.4 Compose the uplink payload ===
687
688 (((
689 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.**
690
691
692 )))
693
694 (((
695 (% style="color:#037691" %)**Examples: AT+DATAUP=0**
696
697
698 )))
699
700 (((
701 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
702 )))
703
704 (((
705 Final Payload is
706 )))
707
708 (((
709 (% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
710 )))
711
712 (((
713 Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
714 )))
715
716 [[image:1653272787040-634.png||height="515" width="719"]]
717
718
719
720 (((
721 (% style="color:#037691" %)**Examples: AT+DATAUP=1**
722
723
724 )))
725
726 (((
727 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
728 )))
729
730 (((
731 Final Payload is
732 )))
733
734 (((
735 (% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
736 )))
737
738 1. (((
739 Battery Info (2 bytes): Battery voltage
740 )))
741 1. (((
742 PAYVER (1 byte): Defined by AT+PAYVER
743 )))
744 1. (((
745 PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
746 )))
747 1. (((
748 PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
749 )))
750 1. (((
751 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
752 )))
753
754 [[image:1653272817147-600.png||height="437" width="717"]]
755
756 So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
757
758
759 DATA1=RETURN1 Valid Value = (% style="background-color:#4f81bd; color:white" %) 20 20 0a 33 90 41
760
761 DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10= (% style="background-color:#4f81bd; color:white" %)02 aa 05 81 0a 20
762
763 DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 =(% style="background-color:#4f81bd; color:white" %) 20 20 20 2d 30
764
765
766 Below are the uplink payloads:
767
768 [[image:1653272901032-107.png]]
769
770
771 (% style="color:red" %)Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:
772
773 ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
774
775 * For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
776
777 * For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
778
779 ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
780
781
782
783 === 3.3.5 Uplink on demand ===
784
785 (((
786 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.
787 )))
788
789 (((
790 Downlink control command:
791 )))
792
793 (((
794 **0x08 command**: Poll an uplink with current command set in RS485-BL.
795 )))
796
797 (((
798 **0xA8 command**: Send a command to RS485-BL and uplink the output from sensors.
799
800
801 )))
802
803 === 3.3.6 Uplink on Interrupt ===
804
805 Put the interrupt sensor between 3.3v_out and GPIO ext.
806
807 [[image:1653273818896-432.png]]
808
809
810 (((
811 AT+INTMOD=0  Disable Interrupt
812 )))
813
814 (((
815 AT+INTMOD=1  Interrupt trigger by rising or falling edge.
816 )))
817
818 (((
819 AT+INTMOD=2  Interrupt trigger by falling edge. ( Default Value)
820 )))
821
822 (((
823 AT+INTMOD=3  Interrupt trigger by rising edge.
824
825
826 )))
827
828 == 3.4 Uplink Payload ==
829
830 [[image:image-20220606105412-1.png]]
831
832 Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
833
834 (((
835 {{{function Decoder(bytes, port) {}}}
836 )))
837
838 (((
839 {{{//Payload Formats of RS485-BL Deceive}}}
840 )))
841
842 (((
843 {{{return {}}}
844 )))
845
846 (((
847 {{{ //Battery,units:V}}}
848 )))
849
850 (((
851 {{{ BatV:((bytes[0]<<8 | bytes[1])&0x7fff)/1000,}}}
852 )))
853
854 (((
855 {{{ //GPIO_EXTI }}}
856 )))
857
858 (((
859 {{{ EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",}}}
860 )))
861
862 (((
863 {{{ //payload of version}}}
864 )))
865
866 (((
867 {{{ Pay_ver:bytes[2],}}}
868 )))
869
870 (((
871 {{{ }; }}}
872 )))
873
874 (((
875 {{{}}}}
876
877
878 )))
879
880 (((
881 TTN V3 uplink screen shot.
882 )))
883
884 [[image:1653274001211-372.png||height="192" width="732"]]
885
886
887 == 3.5 Configure RS485-BL via AT or Downlink ==
888
889 (((
890 User can configure RS485-BL via AT Commands or LoRaWAN Downlink Commands
891 )))
892
893 (((
894 There are two kinds of Commands:
895 )))
896
897 * (((
898 (% 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: [[AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
899 )))
900
901 * (((
902 (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-BL.  User can see these commands below:
903 )))
904
905
906
907 === 3.5.1 Common Commands: ===
908
909 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]]
910
911
912 === 3.5.2 Sensor related commands: ===
913
914
915
916 ==== **Choose Device Type (RS485 or TTL)** ====
917
918 RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
919
920 * **AT Command**
921
922 (% class="box infomessage" %)
923 (((
924 **AT+MOD=1** ~/~/ Set to support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
925 )))
926
927 (% class="box infomessage" %)
928 (((
929 **AT+MOD=2** ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
930 )))
931
932
933 * **Downlink Payload**
934
935 **0A aa**  ~-~->  same as AT+MOD=aa
936
937
938
939
940 ==== **RS485 Debug Command (AT+CFGDEV)** ====
941
942 (((
943 This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
944 )))
945
946 * (((
947 **AT Command**
948 )))
949
950 (% class="box infomessage" %)
951 (((
952 (((
953 **AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
954 )))
955 )))
956
957 (((
958 m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
959 )))
960
961 (((
962
963 )))
964
965 * (((
966 **Downlink Payload**
967 )))
968
969 (((
970 Format: A8 MM NN XX XX XX XX YY
971 )))
972
973 (((
974 Where:
975 )))
976
977 * (((
978 MM: 1: add CRC-16/MODBUS ; 0: no CRC
979 )))
980 * (((
981 NN: The length of RS485 command
982 )))
983 * (((
984 XX XX XX XX: RS485 command total NN bytes
985 )))
986 * (((
987 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
988 )))
989
990 (((
991 **Example 1:**
992 )))
993
994 (((
995 To connect a Modbus Alarm with below commands.
996 )))
997
998 * (((
999 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.
1000 )))
1001
1002 * (((
1003 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.
1004 )))
1005
1006 (((
1007 So if user want to use downlink command to control to RS485 Alarm, he can use:
1008 )))
1009
1010 (((
1011 (% style="color:#037691" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
1012 )))
1013
1014 (((
1015 (% style="color:#037691" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
1016 )))
1017
1018 (((
1019 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.
1020 )))
1021
1022 (((
1023
1024 )))
1025
1026 (((
1027 **Example 2:**
1028 )))
1029
1030 (((
1031 Check TTL Sensor return:
1032 )))
1033
1034 (((
1035 [[image:1654132684752-193.png]]
1036 )))
1037
1038
1039
1040
1041
1042 ==== **Set Payload version** ====
1043
1044 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.
1045
1046 * **AT Command:**
1047
1048 (% class="box infomessage" %)
1049 (((
1050 **AT+PAYVER: Set PAYVER field = 1**
1051 )))
1052
1053
1054 * **Downlink Payload:**
1055
1056 **0xAE 01**  ~-~-> Set PAYVER field =  0x01
1057
1058 **0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
1059
1060
1061
1062
1063 ==== **Set RS485 Sampling Commands** ====
1064
1065 (((
1066 AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
1067 )))
1068
1069 (((
1070 These three commands are used to configure how the RS485-BL polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
1071 )))
1072
1073 (((
1074
1075 )))
1076
1077 * (((
1078 **AT Command:**
1079 )))
1080
1081 (% class="box infomessage" %)
1082 (((
1083 (((
1084 **AT+COMMANDx: Configure RS485 read command to sensor.**
1085 )))
1086 )))
1087
1088 (% class="box infomessage" %)
1089 (((
1090 (((
1091 **AT+DATACUTx: Configure how to handle return from RS485 devices.**
1092 )))
1093 )))
1094
1095 (% class="box infomessage" %)
1096 (((
1097 (((
1098 **AT+SEARCHx: Configure search command**
1099 )))
1100 )))
1101
1102 (((
1103
1104 )))
1105
1106 * (((
1107 **Downlink Payload:**
1108 )))
1109
1110 (((
1111 **0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1112 )))
1113
1114 (((
1115 (% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1116 )))
1117
1118 (((
1119 Format: AF MM NN LL XX XX XX XX YY
1120 )))
1121
1122 (((
1123 Where:
1124 )))
1125
1126 * (((
1127 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1128 )))
1129 * (((
1130 NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1131 )))
1132 * (((
1133 LL:  The length of AT+COMMAND or AT+DATACUT command
1134 )))
1135 * (((
1136 XX XX XX XX: AT+COMMAND or AT+DATACUT command
1137 )))
1138 * (((
1139 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.
1140 )))
1141
1142 (((
1143 **Example:**
1144 )))
1145
1146 (((
1147 (% style="color:#037691" %)**AF 03 01 06 0A 05 00 04 00 01 00**(%%): Same as AT+COMMAND3=0A 05 00 04 00 01,1
1148 )))
1149
1150 (((
1151 (% style="color:#037691" %)**AF 03 02 06**(% style="color:orange" %)** 10 **(% style="color:red" %)**01 **(% style="color:green" %)**05 06 09 0A**(% style="color:#037691" %)** 00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**16**(%%),(% style="color:red" %)**1**(%%),(% style="color:green" %)**5+6+9+10**
1152 )))
1153
1154 (((
1155 (% style="color:#037691" %)**AF 03 02 06 **(% style="color:orange" %)**0B**(% style="color:red" %)** 02 **(% style="color:green" %)**05 07 08 0A **(% style="color:#037691" %)**00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**11**(%%),(% style="color:red" %)**2**(%%),(% style="color:green" %)**5~~7+8~~10**
1156 )))
1157
1158 (((
1159
1160 )))
1161
1162 (((
1163 **0xAB** downlink command can be used for set AT+SEARCHx
1164 )))
1165
1166 (((
1167 **Example:** **AB aa 01 03 xx xx xx** (03 here means there are total 3 bytes after 03) So
1168 )))
1169
1170 * (((
1171 AB aa 01 03 xx xx xx  same as AT+SEARCHaa=1,xx xx xx
1172 )))
1173 * (((
1174 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
1175 )))
1176
1177 (((
1178 **AB aa 02 03 xx xx xx 02 yy yy**  same as **AT+SEARCHaa=2,xx xx xx+yy yy**
1179 )))
1180
1181
1182
1183
1184 ==== **Fast command to handle MODBUS device** ====
1185
1186 (((
1187 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]].
1188 )))
1189
1190 (((
1191 This command is valid since v1.3 firmware version
1192 )))
1193
1194 (((
1195
1196 )))
1197
1198 (((
1199 **AT+MBFUN has only two value:**
1200 )))
1201
1202 * (((
1203 **AT+MBFUN=1**: Enable Modbus reading. And get response base on the MODBUS return
1204 )))
1205
1206 (((
1207 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.
1208 )))
1209
1210 * (((
1211 **AT+MBFUN=0**: Disable Modbus fast reading.
1212 )))
1213
1214 (((
1215 **Example:**
1216 )))
1217
1218 * (((
1219 AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
1220 )))
1221 * (((
1222 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.
1223 )))
1224 * (((
1225 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.
1226 )))
1227
1228 [[image:1654133913295-597.png]]
1229
1230
1231 [[image:1654133954153-643.png]]
1232
1233
1234 * **Downlink Commands:**
1235
1236 **A9 aa** ~-~-> Same as AT+MBFUN=aa
1237
1238
1239
1240
1241 ==== **RS485 command timeout** ====
1242
1243 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.
1244
1245 Default value: 0, range:  0 ~~ 5 seconds
1246
1247
1248 * **AT Command:**
1249
1250 (% class="box infomessage" %)
1251 (((
1252 **AT+CMDDLaa=hex(bb cc)**
1253 )))
1254
1255 **Example:**
1256
1257 **AT+CMDDL1=1000** to send the open time to 1000ms
1258
1259
1260 * **Downlink Payload:**
1261
1262 0x AA aa bb cc
1263
1264 Same as: AT+CMDDLaa=hex(bb cc)
1265
1266 **Example:**
1267
1268 **0xAA 01 03 E8**  ~-~-> Same as **AT+CMDDL1=1000 ms**
1269
1270
1271
1272
1273 ==== **Uplink payload mode** ====
1274
1275 Define to use one uplink or multiple uplinks for the sampling.
1276
1277 The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]
1278
1279 * **AT Command:**
1280
1281 (% class="box infomessage" %)
1282 (((
1283 **AT+DATAUP=0**
1284 )))
1285
1286 (% class="box infomessage" %)
1287 (((
1288 **AT+DATAUP=1**
1289 )))
1290
1291
1292 * **Downlink Payload:**
1293
1294 **0xAD 00**  **~-~->** Same as AT+DATAUP=0
1295
1296 **0xAD 01**  **~-~->** Same as AT+DATAUP=1
1297
1298
1299
1300
1301 ==== **Manually trigger an Uplink** ====
1302
1303 Ask device to send an uplink immediately.
1304
1305 * **Downlink Payload:**
1306
1307 **0x08 FF**, RS485-BL will immediately send an uplink.
1308
1309
1310
1311
1312 ==== **Clear RS485 Command** ====
1313
1314 The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
1315
1316
1317 * **AT Command:**
1318
1319 (((
1320 (% style="color:#037691" %)**AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
1321 )))
1322
1323 Example screen shot after clear all RS485 commands. 
1324
1325
1326 The uplink screen shot is:
1327
1328 [[image:1654134704555-320.png]]
1329
1330
1331 * **Downlink Payload:**
1332
1333 **0x09 aa bb** same as AT+CMDEAR=aa,bb
1334
1335
1336
1337
1338 ==== **Set Serial Communication Parameters** ====
1339
1340 Set the Rs485 serial communication parameters:
1341
1342 * **AT Command:**
1343
1344 Set Baud Rate:
1345
1346 (% class="box infomessage" %)
1347 (((
1348 **AT+BAUDR=9600**    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
1349 )))
1350
1351 Set UART Parity
1352
1353 (% class="box infomessage" %)
1354 (((
1355 **AT+PARITY=0**    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
1356 )))
1357
1358 Set STOPBIT
1359
1360 (% class="box infomessage" %)
1361 (((
1362 **AT+STOPBIT=0**    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1363 )))
1364
1365
1366 * **Downlink Payload:**
1367
1368 **A7 01 aa bb**: Same  AT+BAUDR=hex(aa bb)*100
1369
1370 **Example:**
1371
1372 * A7 01 00 60   same as AT+BAUDR=9600
1373 * A7 01 04 80  same as AT+BAUDR=115200
1374
1375 A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1376
1377 A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1378
1379
1380
1381
1382 ==== **Control output power duration** ====
1383
1384 User can set the output power duration before each sampling.
1385
1386 * **AT Command:**
1387
1388 **Example:**
1389
1390 **AT+3V3T=1000**  ~/~/ 3V3 output power will open 1s before each sampling.
1391
1392 **AT+5VT=1000**  ~/~/ +5V output power will open 1s before each sampling.
1393
1394
1395 * **LoRaWAN Downlink Command:**
1396
1397 **07 01 aa bb**  Same as AT+5VT=(aa bb)
1398
1399 **07 02 aa bb**  Same as AT+3V3T=(aa bb)
1400
1401
1402
1403 == 3.6 Buttons ==
1404
1405 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:233px" %)
1406 |=(% style="width: 89px;" %)**Button**|=(% style="width: 141px;" %)**Feature**
1407 |(% style="width:89px" %)**RST**|(% style="width:141px" %)Reboot RS485-BL
1408
1409
1410
1411 == 3.7 +3V3 Output ==
1412
1413 (((
1414 RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
1415 )))
1416
1417 (((
1418 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. 
1419 )))
1420
1421 (((
1422 The +3V3 output time can be controlled by AT Command.
1423 )))
1424
1425 (((
1426
1427 )))
1428
1429 (((
1430 (% style="color:#037691" %)**AT+3V3T=1000**
1431 )))
1432
1433 (((
1434
1435 )))
1436
1437 (((
1438 Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
1439 )))
1440
1441 (((
1442 By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
1443 )))
1444
1445
1446 == 3.8 +5V Output ==
1447
1448 (((
1449 RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
1450 )))
1451
1452 (((
1453 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. 
1454 )))
1455
1456 (((
1457 The 5V output time can be controlled by AT Command.
1458 )))
1459
1460 (((
1461
1462 )))
1463
1464 (((
1465 (% style="color:#037691" %)**AT+5VT=1000**
1466 )))
1467
1468 (((
1469
1470 )))
1471
1472 (((
1473 Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
1474 )))
1475
1476 (((
1477 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.
1478 )))
1479
1480
1481
1482 == 3.9 LEDs ==
1483
1484 (% border="1" style="background-color:#ffffcc; color:green; width:332px" %)
1485 |=**LEDs**|=(% style="width: 274px;" %)**Feature**
1486 |**LED1**|(% style="width:274px" %)Blink when device transmit a packet.
1487
1488
1489
1490 == 3.10 Switch Jumper ==
1491
1492 (% border="1" style="background-color:#ffffcc; color:green; width:515px" %)
1493 |=(% style="width: 124px;" %)**Switch Jumper**|=(% style="width: 388px;" %)**Feature**
1494 |(% style="width:124px" %)**SW1**|(% style="width:388px" %)(((
1495 ISP position: Upgrade firmware via UART
1496
1497 Flash position: Configure device, check running status.
1498 )))
1499 |(% style="width:124px" %)**SW2**|(% style="width:388px" %)(((
1500 5V position: set to compatible with 5v I/O.
1501
1502 3.3v position: set to compatible with 3.3v I/O.,
1503 )))
1504
1505 (((
1506 **+3.3V**: is always ON
1507 )))
1508
1509 (((
1510 **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1511 )))
1512
1513
1514 = 4. Case Study =
1515
1516 User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]
1517
1518
1519 = 5. Use AT Command =
1520
1521 == 5.1 Access AT Command ==
1522
1523 (((
1524 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.
1525 )))
1526
1527 [[image:1654135840598-282.png]]
1528
1529
1530 (((
1531 In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
1532 )))
1533
1534 [[image:1654136105500-922.png]]
1535
1536
1537 (((
1538 More detail AT Command manual can be found at [[AT Command Manual>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]]
1539 )))
1540
1541
1542 == 5.2 Common AT Command Sequence ==
1543
1544 === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1545
1546 If device has not joined network yet:
1547
1548 (% class="box infomessage" %)
1549 (((
1550 **AT+FDR**
1551 )))
1552
1553 (% class="box infomessage" %)
1554 (((
1555 **AT+NJM=0**
1556 )))
1557
1558 (% class="box infomessage" %)
1559 (((
1560 **ATZ**
1561 )))
1562
1563
1564 (((
1565 If device already joined network:
1566 )))
1567
1568 (% class="box infomessage" %)
1569 (((
1570 **AT+NJM=0**
1571 )))
1572
1573 (% class="box infomessage" %)
1574 (((
1575 **ATZ**
1576 )))
1577
1578
1579 === 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
1580
1581
1582 (% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
1583
1584 (% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%)Set to ABP mode
1585
1586 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
1587
1588 (% style="background-color:#dcdcdc" %)**AT+DR=5**  (%%)Set Data Rate
1589
1590 (% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
1591
1592 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) Set transmit frequency to 868.4Mhz
1593
1594 (% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1595
1596 (% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
1597
1598 (% style="background-color:#dcdcdc" %)**AT+DADDR=26** (%%) 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1599
1600 (% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
1601
1602
1603 (% style="color:red" %)**Note:**
1604
1605 (((
1606 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1607 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1608 3. 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.
1609 4. 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
1610 )))
1611
1612 [[image:1654136435598-589.png]]
1613
1614
1615 = 6. FAQ =
1616
1617 == 6.1 How to upgrade the image? ==
1618
1619 (((
1620 The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1621 )))
1622
1623 * (((
1624 Support new features
1625 )))
1626 * (((
1627 For bug fix
1628 )))
1629 * (((
1630 Change LoRaWAN bands.
1631 )))
1632
1633 (((
1634 Below shows the hardware connection for how to upload an image to RS485-BL:
1635 )))
1636
1637 [[image:1654136646995-976.png]]
1638
1639 **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]].
1640
1641 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1642
1643 **Step3: **Open flashloader; choose the correct COM port to update.
1644
1645 [[image:image-20220602102605-1.png]]
1646
1647
1648 [[image:image-20220602102637-2.png]]
1649
1650
1651 [[image:image-20220602102715-3.png]]
1652
1653
1654
1655 == 6.2 How to change the LoRa Frequency Bands/Region? ==
1656
1657 (((
1658 User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1659 )))
1660
1661
1662
1663 == 6.3 How many RS485-Slave can RS485-BL connects? ==
1664
1665 (((
1666 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>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
1667 )))
1668
1669
1670
1671 = 7. Trouble Shooting =
1672
1673
1674 == 7.1 Downlink doesn’t work, how to solve it? ==
1675
1676 Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
1677
1678
1679 == 7.2 Why I can’t join TTN V3 in US915 /AU915 bands? ==
1680
1681 It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1682
1683
1684 = 8. Order Info =
1685
1686 (% style="color:blue" %)**Part Number: RS485-BL-XXX**
1687
1688 (% style="color:blue" %)**XXX:**
1689
1690 * (% style="color:blue" %)**EU433**(%%): frequency bands EU433
1691 * (% style="color:blue" %)**EU868**(%%): frequency bands EU868
1692 * (% style="color:blue" %)**KR920**(%%): frequency bands KR920
1693 * (% style="color:blue" %)**CN470**(%%): frequency bands CN470
1694 * (% style="color:blue" %)**AS923**(%%): frequency bands AS923
1695 * (% style="color:blue" %)**AU915**(%%): frequency bands AU915
1696 * (% style="color:blue" %)**US915**(%%): frequency bands US915
1697 * (% style="color:blue" %)**IN865**(%%): frequency bands IN865
1698 * (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1699 * (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1700
1701
1702
1703 = 9. Packing Info =
1704
1705 (((
1706 **Package Includes**:
1707 )))
1708
1709 * (((
1710 RS485-BL x 1
1711 )))
1712 * (((
1713 Stick Antenna for LoRa RF part x 1
1714 )))
1715 * (((
1716 Program cable x 1
1717 )))
1718
1719 (((
1720 **Dimension and weight**:
1721 )))
1722
1723 * (((
1724 Device Size: 13.5 x 7 x 3 cm
1725 )))
1726 * (((
1727 Device Weight: 105g
1728 )))
1729 * (((
1730 Package Size / pcs : 14.5 x 8 x 5 cm
1731 )))
1732 * (((
1733 Weight / pcs : 170g
1734
1735
1736 )))
1737
1738 = 10. Support =
1739
1740 * (((
1741 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.
1742 )))
1743 * (((
1744 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 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1745 )))