Version 30.8 by Xiaoling on 2022/06/02 09:37
Show last authors
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 v1.4
128 )))
129
130 (((
131 ~1. Change Power IC to TPS22916
132 )))
133
134
135 (((
136 v1.3
137 )))
138
139 (((
140 ~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
141 )))
142
143
144 (((
145 v1.2
146 )))
147
148 (((
149 Release version ​​​​​
150
151
152 )))
153
154 = 2. Pin mapping and Power ON Device =
155
156 (((
157 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.
158 )))
159
160 [[image:1652953055962-143.png||height="387" width="728"]]
161
162
163 The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
164
165
166 = 3. Operation Mode =
167
168 == 3.1 How it works? ==
169
170 (((
171 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.
172
173
174 )))
175
176 == 3.2 Example to join LoRaWAN network ==
177
178 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. 
179
180 [[image:1652953414711-647.png||height="337" width="723"]]
181
182 (((
183 The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
184 )))
185
186 (((
187 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:
188 )))
189
190 (((
191 **Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-BL.
192 )))
193
194 (((
195 Each RS485-BL is shipped with a sticker with unique device EUI:
196 )))
197
198 [[image:1652953462722-299.png]]
199
200 (((
201 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
202 )))
203
204 (((
205 Add APP EUI in the application.
206 )))
207
208
209 [[image:image-20220519174512-1.png]]
210
211 [[image:image-20220519174512-2.png||height="328" width="731"]]
212
213 [[image:image-20220519174512-3.png||height="556" width="724"]]
214
215 [[image:image-20220519174512-4.png]]
216
217 You can also choose to create the device manually.
218
219 [[image:1652953542269-423.png||height="710" width="723"]]
220
221 Add APP KEY and DEV EUI
222
223 [[image:1652953553383-907.png||height="514" width="724"]]
224
225
226 (((
227 **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.
228 )))
229
230 [[image:1652953568895-172.png||height="232" width="724"]]
231
232
233 == 3.3 Configure Commands to read data ==
234
235 (((
236 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.
237
238
239 )))
240
241 === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
242
243 RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
244
245 **~1. RS485-MODBUS mode:**
246
247 AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
248
249 **2. TTL mode:**
250
251 AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
252
253 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.
254
255 (% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
256 |(((
257 **AT Commands**
258 )))|(% style="width:285px" %)(((
259 **Description**
260 )))|(% style="width:347px" %)(((
261 **Example**
262 )))
263 |(((
264 AT+BAUDR
265 )))|(% style="width:285px" %)(((
266 Set the baud rate (for RS485 connection). Default Value is: 9600.
267 )))|(% style="width:347px" %)(((
268 (((
269 AT+BAUDR=9600
270 )))
271
272 (((
273 Options: (1200,2400,4800,14400,19200,115200)
274 )))
275 )))
276 |(((
277 AT+PARITY
278 )))|(% style="width:285px" %)(((
279 (((
280 Set UART parity (for RS485 connection)
281 )))
282
283 (((
284 Default Value is: no parity.
285 )))
286 )))|(% style="width:347px" %)(((
287 (((
288 AT+PARITY=0
289 )))
290
291 (((
292 Option: 0: no parity, 1: odd parity, 2: even parity
293 )))
294 )))
295 |(((
296 AT+STOPBIT
297 )))|(% style="width:285px" %)(((
298 (((
299 Set serial stopbit (for RS485 connection)
300 )))
301
302 (((
303 Default Value is: 1bit.
304 )))
305 )))|(% style="width:347px" %)(((
306 (((
307 AT+STOPBIT=0 for 1bit
308 )))
309
310 (((
311 AT+STOPBIT=1 for 1.5 bit
312 )))
313
314 (((
315 AT+STOPBIT=2 for 2 bits
316 )))
317 )))
318
319 === 3.3.2 Configure sensors ===
320
321 (((
322 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**.
323 )))
324
325 (((
326 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.
327 )))
328
329 (% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
330 |**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
331 |AT+CFGDEV|(% style="width:418px" %)(((
332 This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
333
334 AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
335
336 mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
337 )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
338
339 Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>||anchor="HRS485DebugCommand28AT2BCFGDEV29"]].
340
341
342 === 3.3.3 Configure read commands for each sampling ===
343
344 (((
345 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.
346 )))
347
348 (((
349 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.
350 )))
351
352 (((
353 To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
354 )))
355
356 (((
357 This section describes how to achieve above goals.
358 )))
359
360 (((
361 During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
362 )))
363
364 (((
365 **Command from RS485-BL to Sensor:**
366 )))
367
368 (((
369 RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
370 )))
371
372 (((
373 **Handle return from sensors to RS485-BL**:
374 )))
375
376 (((
377 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**
378 )))
379
380 * (((
381 **AT+DATACUT**
382 )))
383
384 (((
385 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.
386 )))
387
388 * (((
389 **AT+SEARCH**
390 )))
391
392 (((
393 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.
394 )))
395
396 (((
397 **Define wait timeout:**
398 )))
399
400 (((
401 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
402 )))
403
404 (((
405 After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
406 )))
407
408 **Examples:**
409
410 Below are examples for the how above AT Commands works.
411
412 **AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
413
414 (% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:501px" %)
415 |(% style="width:498px" %)(((
416 **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
417
418 **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
419
420 **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
421 )))
422
423 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.
424
425 In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
426
427 **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
428
429 (% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:580px" %)
430 |(% style="width:577px" %)(((
431 **AT+SEARCHx=aa,xx xx xx xx xx**
432
433 * **aa: 1: prefix match mode; 2: prefix and suffix match mode**
434 * **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
435 )))
436
437 **Examples:**
438
439 1）For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
440
441 If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
442
443 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**
444
445 [[image:1653271044481-711.png]]
446
447 2）For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
448
449 If we set AT+SEARCH1=2, 1E 56 34+31 00 49
450
451 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**
452
453 [[image:1653271276735-972.png]]
454
455 **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
456
457 (% style="background-color:#4f81bd; color:white; width:729px" %)
458 |(% style="width:726px" %)(((
459 **AT+DATACUTx=a,b,c**
460
461 * **a: length for the return of AT+COMMAND**
462 * **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
463 * **c: define the position for valid value.  **
464 )))
465
466 **Examples:**
467
468 * Grab bytes:
469
470 [[image:1653271581490-837.png||height="313" width="722"]]
471
472
473 * Grab a section.
474
475 [[image:1653271648378-342.png||height="326" width="720"]]
476
477
478 * Grab different sections.
479
480 [[image:1653271657255-576.png||height="305" width="730"]]
481
482 (((
483 (% style="color:red" %)**Note:**
484 )))
485
486 (((
487 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.
488 )))
489
490 (((
491 **Example:**
492 )))
493
494 (((
495 (% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
496 )))
497
498 (((
499 (% style="color:red" %)AT+SEARCH1=1,1E 56 34
500 )))
501
502 (((
503 (% style="color:red" %)AT+DATACUT1=0,2,1~~5
504 )))
505
506 (((
507 (% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
508 )))
509
510 (((
511 (% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
512 )))
513
514 (((
515 (% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
516 )))
517
518 [[image:1653271763403-806.png]]
519
520
521 === 3.3.4 Compose the uplink payload ===
522
523 (((
524 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.**
525 )))
526
527 (((
528 (% style="color:#037691" %)**Examples: AT+DATAUP=0**
529 )))
530
531 (((
532 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
533 )))
534
535 (((
536 Final Payload is
537 )))
538
539 (((
540 (% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
541 )))
542
543 (((
544 Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
545 )))
546
547 [[image:1653272787040-634.png||height="515" width="719"]]
548
549
550
551 (((
552 (% style="color:#037691" %)**Examples: AT+DATAUP=1**
553
554
555 )))
556
557 (((
558 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
559 )))
560
561 (((
562 Final Payload is
563 )))
564
565 (((
566 (% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
567 )))
568
569 1. (((
570 Battery Info (2 bytes): Battery voltage
571 )))
572 1. (((
573 PAYVER (1 byte): Defined by AT+PAYVER
574 )))
575 1. (((
576 PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
577 )))
578 1. (((
579 PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
580 )))
581 1. (((
582 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
583 )))
584
585 [[image:1653272817147-600.png||height="437" width="717"]]
586
587 So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
588
589
590 DATA1=RETURN1 Valid Value = (% style="background-color:#4f81bd; color:white" %) 20 20 0a 33 90 41
591
592 DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10= (% style="background-color:#4f81bd; color:white" %)02 aa 05 81 0a 20
593
594 DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 =(% style="background-color:#4f81bd; color:white" %) 20 20 20 2d 30
595
596
597 Below are the uplink payloads:
598
599 [[image:1653272901032-107.png]]
600
601
602 (% style="color:red" %)Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:
603
604 ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
605
606 * For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
607
608 * For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
609
610 ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
611
612
613
614 === 3.3.5 Uplink on demand ===
615
616 (((
617 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.
618 )))
619
620 (((
621 Downlink control command:
622 )))
623
624 (((
625 **0x08 command**: Poll an uplink with current command set in RS485-BL.
626 )))
627
628 (((
629 **0xA8 command**: Send a command to RS485-BL and uplink the output from sensors.
630
631
632 )))
633
634 === 3.3.6 Uplink on Interrupt ===
635
636 Put the interrupt sensor between 3.3v_out and GPIO ext.
637
638 [[image:1653273818896-432.png]]
639
640
641 (((
642 AT+INTMOD=0  Disable Interrupt
643 )))
644
645 (((
646 AT+INTMOD=1  Interrupt trigger by rising or falling edge.
647 )))
648
649 (((
650 AT+INTMOD=2  Interrupt trigger by falling edge. ( Default Value)
651 )))
652
653 (((
654 AT+INTMOD=3  Interrupt trigger by rising edge.
655
656
657 )))
658
659 == 3.4 Uplink Payload ==
660
661 (% border="1" style="background-color:#4f81bd; color:white; width:850px" %)
662 |**Size(bytes)**|(% style="width:130px" %)**2**|(% style="width:93px" %)**1**|(% style="width:509px" %)**Length depends on the return from the commands**
663 |Value|(% style="width:130px" %)(((
664 (((
665 Battery(mV)
666 )))
667
668 (((
669 &
670 )))
671
672 (((
673 Interrupt _Flag
674 )))
675 )))|(% style="width:93px" %)(((
676 PAYLOAD_VER
677
678
679 )))|(% style="width:509px" %)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.
680
681 Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
682
683 (((
684 {{{function Decoder(bytes, port) {}}}
685 )))
686
687 (((
688 {{{//Payload Formats of RS485-BL Deceive}}}
689 )))
690
691 (((
692 {{{return {}}}
693 )))
694
695 (((
696 {{{ //Battery,units:V}}}
697 )))
698
699 (((
700 {{{ BatV:((bytes[0]<<8 | bytes[1])&0x7fff)/1000,}}}
701 )))
702
703 (((
704 {{{ //GPIO_EXTI }}}
705 )))
706
707 (((
708 {{{ EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",}}}
709 )))
710
711 (((
712 {{{ //payload of version}}}
713 )))
714
715 (((
716 {{{ Pay_ver:bytes[2],}}}
717 )))
718
719 (((
720 {{{ }; }}}
721 )))
722
723 (((
724 }
725
726
727 )))
728
729 (((
730 TTN V3 uplink screen shot.
731 )))
732
733 [[image:1653274001211-372.png||height="192" width="732"]]
734
735
736 == 3.5 Configure RS485-BL via AT or Downlink ==
737
738 User can configure RS485-BL via AT Commands or LoRaWAN Downlink Commands
739
740 There are two kinds of Commands:
741
742 * (% 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]]
743
744 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-BL.  User can see these commands below:
745
746 === 3.5.1 Common Commands: ===
747
748 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]]
749
750
751 === 3.5.2 Sensor related commands: ===
752
753 ==== ====
754
755 ==== **Choose Device Type (RS485 or TTL)** ====
756
757 RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
758
759 * **AT Command**
760
761 (% class="box infomessage" %)
762 (((
763 **AT+MOD=1** ~/~/ Set to support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
764 )))
765
766 (% class="box infomessage" %)
767 (((
768 **AT+MOD=2** ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
769 )))
770
771
772 * **Downlink Payload**
773
774 **0A aa**  ~-~->  same as AT+MOD=aa
775
776
777
778 ==== **RS485 Debug Command (AT+CFGDEV)** ====
779
780 This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
781
782 * **AT Command**
783
784 (% class="box infomessage" %)
785 (((
786 **AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**
787 )))
788
789 m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
790
791
792 * **Downlink Payload**
793
794 Format: A8 MM NN XX XX XX XX YY
795
796 Where:
797
798 * MM: 1: add CRC-16/MODBUS ; 0: no CRC
799 * NN: The length of RS485 command
800 * XX XX XX XX: RS485 command total NN bytes
801 * 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
802
803 **Example 1:**
804
805 To connect a Modbus Alarm with below commands.
806
807 * 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.
808
809 * 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.
810
811 So if user want to use downlink command to control to RS485 Alarm, he can use:
812
813 (% style="color:#037691" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
814
815 (% style="color:#037691" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
816
817 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.
818
819
820 **Example 2:**
821
822 Check TTL Sensor return:
823
824 [[image:1654132684752-193.png]]
825
826
827
828 ==== **Set Payload version** ====
829
830 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.
831
832 * **AT Command:**
833
834 (% class="box infomessage" %)
835 (((
836 **AT+PAYVER: Set PAYVER field = 1**
837 )))
838
839
840 * **Downlink Payload:**
841
842 **0xAE 01**  ~-~-> Set PAYVER field =  0x01
843
844 **0xAE 0F**   ~-~-> Set PAYVER field =  0x0F
845
846
847
848 ==== **Set RS485 Sampling Commands** ====
849
850 AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
851
852 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"]].
853
854
855 * **AT Command:**
856
857 (% class="box infomessage" %)
858 (((
859 **AT+COMMANDx: Configure RS485 read command to sensor.**
860 )))
861
862 (% class="box infomessage" %)
863 (((
864 **AT+DATACUTx: Configure how to handle return from RS485 devices.**
865 )))
866
867 (% class="box infomessage" %)
868 (((
869 **AT+SEARCHx: Configure search command**
870 )))
871
872
873 * **Downlink Payload:**
874
875 **0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
876
877 (% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
878
879 Format: AF MM NN LL XX XX XX XX YY
880
881 Where:
882
883 * MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
884 * NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
885 * LL:  The length of AT+COMMAND or AT+DATACUT command
886 * XX XX XX XX: AT+COMMAND or AT+DATACUT command
887 * 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.
888
889 **Example:**
890
891 (% 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
892
893 (% 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**
894
895 (% 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**
896
897
898 **0xAB** downlink command can be used for set AT+SEARCHx
899
900 **Example:** **AB aa 01 03 xx xx xx** (03 here means there are total 3 bytes after 03) So
901
902 * AB aa 01 03 xx xx xx  same as AT+SEARCHaa=1,xx xx xx
903 * 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
904
905 **AB aa 02 03 xx xx xx 02 yy yy**  same as **AT+SEARCHaa=2,xx xx xx+yy yy**
906
907
908
909 ==== Fast command to handle MODBUS device ====
910
911 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]].
912
913 This command is valid since v1.3 firmware version
914
915
916 AT+MBFUN has only two value:
917
918 * AT+MBFUN=1: Enable Modbus reading. And get response base on the MODBUS return
919
920 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.
921
922 * AT+MBFUN=0: Disable Modbus fast reading.
923
924 Example:
925
926 * AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
927 * 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.
928 * 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.
929
930 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]
931
932
933 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
934
935
936 * Downlink Commands:
937
938 A9 aa -à Same as AT+MBFUN=aa
939
940
941 ==== RS485 command timeout ====
942
943 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.
944
945 Default value: 0, range:  0 ~~ 5 seconds
946
947
948 * AT Command:
949
950 AT+CMDDLaa=hex(bb cc)
951
952 Example:
953
954 **AT+CMDDL1=1000** to send the open time to 1000ms
955
956
957 * Downlink Payload:
958
959 0x AA aa bb cc
960
961 Same as: AT+CMDDLaa=hex(bb cc)
962
963 Example:
964
965 0xAA 01 03 E8  à Same as **AT+CMDDL1=1000 ms**
966
967
968 ==== [[Uplink>>path:#downlink_A8]] payload mode ====
969
970 Define to use one uplink or multiple uplinks for the sampling.
971
972 The use of this command please see: [[Compose Uplink payload>>path:#DataUP]]
973
974 * AT Command:
975
976 AT+DATAUP=0
977
978 AT+DATAUP=1
979
980
981 * Downlink Payload:
982
983 0xAD 00   à Same as AT+DATAUP=0
984
985 0xAD 01   à Same as AT+DATAUP=1
986
987
988 ==== Manually trigger an Uplink ====
989
990 Ask device to send an uplink immediately.
991
992 * Downlink Payload:
993
994 0x08 FF, RS485-BL will immediately send an uplink.
995
996
997 ==== Clear RS485 Command ====
998
999 The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
1000
1001
1002 * AT Command:
1003
1004 **AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
1005
1006 Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
1007
1008 Example screen shot after clear all RS485 commands. 
1009
1010
1011
1012 The uplink screen shot is:
1013
1014 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1015
1016
1017 * Downlink Payload:
1018
1019 0x09 aa bb same as AT+CMDEAR=aa,bb
1020
1021
1022 ==== Set Serial Communication Parameters ====
1023
1024 Set the Rs485 serial communication parameters:
1025
1026 * AT Command:
1027
1028 Set Baud Rate:
1029
1030 AT+BAUDR=9600    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
1031
1032
1033 Set UART parity
1034
1035 AT+PARITY=0    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
1036
1037
1038 Set STOPBIT
1039
1040 AT+STOPBIT=0    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1041
1042
1043 * Downlink Payload:
1044
1045 A7 01 aa bb: Same  AT+BAUDR=hex(aa bb)*100
1046
1047 Example:
1048
1049 * A7 01 00 60   same as AT+BAUDR=9600
1050 * A7 01 04 80  same as AT+BAUDR=115200
1051
1052 A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1053
1054 A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1055
1056
1057 ==== Control output power duration ====
1058
1059 User can set the output power duration before each sampling.
1060
1061 * AT Command:
1062
1063 Example:
1064
1065 AT+3V3T=1000 ~/~/ 3V3 output power will open 1s before each sampling.
1066
1067 AT+5VT=1000 ~/~/ +5V output power will open 1s before each sampling.
1068
1069
1070 * LoRaWAN Downlink Command:
1071
1072 07 01 aa bb  Same as AT+5VT=(aa bb)
1073
1074 07 02 aa bb  Same as AT+3V3T=(aa bb)
1075
1076
1077
1078
1079 1.
1080 11. Buttons
1081
1082 |**Button**|**Feature**
1083 |**RST**|Reboot RS485-BL
1084
1085 1.
1086 11. +3V3 Output
1087
1088 RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
1089
1090 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. 
1091
1092
1093 The +3V3 output time can be controlled by AT Command.
1094
1095 **AT+3V3T=1000**
1096
1097 Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
1098
1099
1100 By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
1101
1102
1103 1.
1104 11. +5V Output
1105
1106 RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
1107
1108 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. 
1109
1110
1111 The 5V output time can be controlled by AT Command.
1112
1113 **AT+5VT=1000**
1114
1115 Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
1116
1117
1118 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.
1119
1120
1121
1122
1123 1.
1124 11. LEDs
1125
1126 |**LEDs**|**Feature**
1127 |**LED1**|Blink when device transmit a packet.
1128
1129 1.
1130 11. Switch Jumper
1131
1132 |**Switch Jumper**|**Feature**
1133 |**SW1**|(((
1134 ISP position: Upgrade firmware via UART
1135
1136 Flash position: Configure device, check running status.
1137 )))
1138 |**SW2**|(((
1139 5V position: set to compatible with 5v I/O.
1140
1141 3.3v position: set to compatible with 3.3v I/O.,
1142 )))
1143
1144 +3.3V: is always ON
1145
1146 +5V: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1147
1148 1. Case Study
1149
1150 User can check this URL for some case studies.
1151
1152 [[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]]
1153
1154
1155
1156
1157 1. Use AT Command
1158 11. Access AT Command
1159
1160 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.
1161
1162 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1163
1164
1165 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:
1166
1167 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1168
1169
1170
1171 More detail AT Command manual can be found at [[AT Command Manual>>path:#AT_COMMAND]]
1172
1173
1174
1175 1.
1176 11. Common AT Command Sequence
1177 111. Multi-channel ABP mode (Use with SX1301/LG308)
1178
1179 If device has not joined network yet:
1180
1181 AT+FDR
1182
1183 AT+NJM=0
1184
1185 ATZ
1186
1187
1188 If device already joined network:
1189
1190 AT+NJM=0
1191
1192 ATZ
1193
1194 1.
1195 11.
1196 111. Single-channel ABP mode (Use with LG01/LG02)
1197
1198 AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1199
1200 AT+NJM=0 Set to ABP mode
1201
1202 AT+ADR=0 Set the Adaptive Data Rate Off
1203
1204 AT+DR=5  Set Data Rate
1205
1206 AT+TDC=60000  Set transmit interval to 60 seconds
1207
1208 AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1209
1210 AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1211
1212 AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1213
1214 AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1215
1216 ATZ          Reset MCU
1217
1218 **Note:**
1219
1220 1. Make sure the device is set to ABP mode in the IoT Server.
1221 1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1222 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.
1223 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
1224
1225 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1226
1227
1228 1. FAQ
1229 11. How to upgrade the image?
1230
1231 The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1232
1233 * Support new features
1234 * For bug fix
1235 * Change LoRaWAN bands.
1236
1237 Below shows the hardware connection for how to upload an image to RS485-BL:
1238
1239 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1240
1241 **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]].
1242
1243 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1244
1245 **Step3: **Open flashloader; choose the correct COM port to update.
1246
1247
1248 |(((
1249 HOLD PRO then press the RST button, SYS will be ON, then click next
1250 )))
1251
1252 |(((
1253 Board detected
1254 )))
1255
1256 |(((
1257
1258 )))
1259
1260 [[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]]
1261
1262
1263
1264 [[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]]
1265
1266
1267 [[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]]
1268
1269
1270 1.
1271 11. How to change the LoRa Frequency Bands/Region?
1272
1273 User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1274
1275
1276
1277 1.
1278 11. How many RS485-Slave can RS485-BL connects?
1279
1280 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]].
1281
1282
1283
1284
1285 1. Trouble Shooting     
1286 11. Downlink doesn’t work, how to solve it?
1287
1288 Please see this link for debug:
1289
1290 [[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]] 
1291
1292
1293
1294 1.
1295 11. Why I can’t join TTN V3 in US915 /AU915 bands?
1296
1297 It might about the channels mapping. Please see for detail.
1298
1299 [[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]]
1300
1301
1302
1303 1. Order Info
1304
1305 **Part Number: RS485-BL-XXX**
1306
1307 **XXX:**
1308
1309 * **EU433**: frequency bands EU433
1310 * **EU868**: frequency bands EU868
1311 * **KR920**: frequency bands KR920
1312 * **CN470**: frequency bands CN470
1313 * **AS923**: frequency bands AS923
1314 * **AU915**: frequency bands AU915
1315 * **US915**: frequency bands US915
1316 * **IN865**: frequency bands IN865
1317 * **RU864**: frequency bands RU864
1318 * **KZ865: **frequency bands KZ865
1319
1320 1. Packing Info
1321
1322 **Package Includes**:
1323
1324 * RS485-BL x 1
1325 * Stick Antenna for LoRa RF part x 1
1326 * Program cable x 1
1327
1328 **Dimension and weight**:
1329
1330 * Device Size: 13.5 x 7 x 3 cm
1331 * Device Weight: 105g
1332 * Package Size / pcs : 14.5 x 8 x 5 cm
1333 * Weight / pcs : 170g
1334
1335 1. Support
1336
1337 * 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.
1338 * 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
1339
1340 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]

Applications

Navigation

Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0