Last modified by Bei Jinggeng on 2024/04/30 15:42
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1 **Table of Contents：**
2
3 {{toc/}}
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9
10
11 = **1.  point to point** =
12
13 == **1.1  Overview** ==
14
15 (((
16 [[image:1656901825798-483.png]]
17
18
19
20 == **1.2  Configure** ==
21
22
23 (% style="color:blue" %)**A's configuration:  ** **B's configuration:**
24
25 AT+GROUPMOD=0  AT+GROUPMOD=0
26
27 AT+GROUPID=12345678  AT+GROUPID=12345678
28
29 AT+TXCHS=868700000  AT+TXCHS=869000000
30
31 AT+RXCHS=869000000  AT+RXCHS=868700000
32
33 AT+CFGDEV=01 03 00 00 00 04,1  AT+CFGDEV=01 03 00 00 00 02,1
34
35 or  or
36
37 AT+COMMAND=01 03 00 00 00 04,1  AT+COMMAND=01 03 00 00 00 02,1
38 )))
39
40
41
42 == **1.3  Serial port display** ==
43
44
45 [[image:image-20220704103422-2.png||height="430" width="817"]]
46
47 (((
48 A sends a command to B to query B's RS485 sensor data and display it on A's upper computer.
49 )))
50
51 (((
52 Similarly, B sends a command to A to query A's RS485 sensor data and display it on B's upper computer.
53 )))
54
55
56 [[image:image-20220704103502-3.png]]
57
58 (((
59 (% data-sider-select-id="8e84c97f-97c9-47b5-afbd-e7cc77629fea" %)
60 If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 10 seconds, and the UplinkCounter of the retransmission will not increase. (Retransmission only occurs when using the AT+CFGDEV command or triggering an external interrupt)
61 )))
62
63
64
65 = **2.  Point To Mult-Point ** =
66
67 == (% data-sider-select-id="4dc2ef7f-a118-4ded-9b73-05d0d1e1b75b" %)**2.1  Overview**(%%) ==
68
69
70 [[image:1656901541427-229.png]]
71
72
73 == (% data-sider-select-id="bd833649-16b9-4259-adc1-73e489ec3912" %)**2.2  Configure**(%%) ==
74
75
76 (% data-sider-select-id="809f0ceb-1a62-4e1d-8aa6-9a12c485bcb8" style="color:blue" %)**Configuration of the TX group:**
77
78 AT+GROUPMOD=0,2
79
80 AT+GROUPID=12345678
81
82 AT+TXCHS=868700000
83
84 AT+RXCHS=869000000
85
86 AT+CFGDEV=01 03 00 00 00 02,1
87
88 or
89
90 AT+COMMAND=01 03 00 00 00 02,1
91
92
93 (% style="color:blue" %)**Configuration for RX group number 1:**
94
95 AT+GROUPMOD=1,1
96
97 AT+GROUPID=12345678
98
99 AT+TXCHS=869000000
100
101 AT+RXCHS=868700000
102
103
104 (% style="color:blue" %)**Configuration for RX group number 2:**
105
106 AT+GROUPMOD=1,2
107
108 AT+GROUPID=12345678
109
110 AT+TXCHS=869000000
111
112 AT+RXCHS=868700000
113
114
115
116 == (% data-sider-select-id="0bffbb87-9169-426e-8f09-a6a5603b35a9" %)**2.3  Serial port display**(%%) ==
117
118 (% id="cke_bm_79849S" style="display:none" %) [[image:1656901280202-290.png]]
119
120
121 [[image:image-20220704103658-4.png||height="495" width="852"]]
122
123 (((
124 The TX group sends broadcast data to the RX group. After the RX group receives the data, it will reply to the TX group in order from small to large.(% style="display:none" %)
125 )))
126
127 (% style="display:none" %) (%%)
128
129
130 [[image:image-20220704103658-5.png]]
131
132 (((
133 (% data-sider-select-id="4d98d2d3-b7f6-4f2a-91e1-d65b9392aca1" %)
134 If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 30 seconds, and the UplinkCounter of the retransmission will not increase.(Retransmission only occurs when using the AT+CFGDEV command or triggering an external interrupt)
135 )))
136
137 (% style="display:none" %) (%%)
138
139 (% data-sider-select-id="7b4bbeb1-7dda-4179-9621-d8d6f6aa0fc0" %)
140 = (% data-sider-select-id="e960f7c8-2a3f-496a-b62f-425f1133b00e" %)**3   Point to Point (RS485 Pass Through).**(%%) =
141
142 == (% data-sider-select-id="4dc2ef7f-a118-4ded-9b73-05d0d1e1b75b" %)**3.1  Overview**(%%) ==
143
144 (% data-sider-select-id="e960f7c8-2a3f-496a-b62f-425f1133b00e" %)**PC ~-~-> RS485 to USB adapter ~-~-> RS485-LN A<~-~-~-~--LoRa ~-~-~-~-> RS485-LN B<~-~- >RS485 sensor**
145
146 [[image:image-20240430153458-2.png]]
147
148
149 == (% data-sider-select-id="4dc2ef7f-a118-4ded-9b73-05d0d1e1b75b" %)**3.2 **(% data-sider-select-id="bd833649-16b9-4259-adc1-73e489ec3912" %)**Configure**(%%) ==
150
151 (% data-sider-select-id="809f0ceb-1a62-4e1d-8aa6-9a12c485bcb8" style="color:blue" %)**Configuration of the PC:**
152
153 (% data-sider-select-id="1f71c512-1e78-4d70-998d-fa9a5e6d5fc8" %)
154 RS485 sensor read command
155
156
157 (% data-sider-select-id="fb8dd359-d0dd-4b15-a1ec-d8a7532f876f" style="color:blue" %)**Configuration for RX group number 1:**
158
159 (% data-sider-select-id="85b4fff7-5f64-4d7c-9084-ed37c89c0db7" %)
160 AT+MOD=1,500
161
162 (% data-sider-select-id="8131b4ed-95d6-45f2-a437-98c105271570" %)
163 AT+GROUPID=12345678
164
165 AT+TXCHS=869000000
166
167 AT+RXCHS=868700000
168
169
170 (% style="color:blue" %)**Configuration for RX group number 2:**
171
172 AT+GROUPID=12345678
173
174 AT+TXCHS=869000000
175
176 AT+RXCHS=868700000
177
178 Configure parameters consistent with the RS485 sensor：
179
180 AT+BAUDR=4800
181
182 AT+PARITY=0
183
184 AT+DATABIT=8
185
186 AT+STOPBIT=0
187
188 AT+SCHEDULE=0,0
189
190 AT+CMDDL=400
191
192
193
194
195 == (% data-sider-select-id="0bffbb87-9169-426e-8f09-a6a5603b35a9" %)**3.3  Serial port display**(%%) ==
196
197 [[image:image-20240430145609-1.png||height="652" width="1152"]]
198
199 If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 30 seconds, and the UplinkCounter of the retransmission will not increase.(Retransmission only occurs when using the AT+CFGDEV command or triggering an external interrupt)
200
201
202 = (% data-sider-select-id="45a0429e-5661-4b10-9cb4-be581299c196" %)**4.  AT command**(%%) =
203
204 (% style="display:none" %) (%%) (% style="display:none" %)
205
206 (((
207 (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
208 )))
209
210 (((
211 (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
212 )))
213
214 (((
215 (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Co(% style="display:none" %) (%%)unter Uplink
216 )))
217
218 (((
219 (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
220 )))
221
222 (((
223 (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
224 )))
225
226 (((
227 (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
228 )))
229
230 (((
231 (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
232 )))
233
234 (((
235 (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
236 )))
237
238 (((
239 (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
240 )))
241
242 (((
243 (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
244 )))
245
246 (((
247 (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
248 )))
249
250 (((
251 (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
252 )))
253
254 (((
255 (% style="color:#037691" %)**AT+CR **(%%)**:        **Get or Set the coding rate [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] (default:1)
256 )))
257
258 (((
259 (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
260 )))
261
262 (((
263 (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
264 )))
265
266 (((
267 (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
268 )))
269
270 (((
271 (% style="color:#037691" %)**AT+GROUPMOD **(%%)**:   **Set or Get the grouping (% style="display:none" %) (%%)mode of the device (default: 0)
272 )))
273
274 (((
275 (((
276 (% style="color:#037691" %)**AT+GROUPID **(%%)**:        **Set or Get the password for (% style="display:none" %) (%%)matching between TX group and RX group, which can be composed of numbers or characters (default: 12345678)(% style="display:none" %)
277
278 (((
279 (% style="color:#037691" %)**AT+INTMOD **(%%)**:**  Get or Set the trigger interrupt mode
280 )))
281
282 (((
283 (% style="color:#037691" %)**AT+BAUDR **(%%)**:**  Get or set the baud rate of rs485. (default: 9600)
284 )))
285
286 (((
287 (% style="color:#037691" %)**AT+DATABIT **(%%)**:**  Get or Set databit(7:7 bits,8:8 bits) of rs485 (default: 8)
288 )))
289
290 (((
291 (% style="color:#037691" %)**AT+PARITY **(%%)**:           **Get or Set parity(0:none,1:odd,2:even) of rs485(default: 0)
292 )))
293
294 (((
295 (% style="color:#037691" %)**AT+STOPBIT **(%%)**:         **Get or Set stopbit(0:1 bit,1:1.5 bit,2:2 bit) of rs485(default: 0)
296 )))
297
298 (((
299 (% style="color:#037691" %)**AT+CMDDL **(%%)**:**  Get or Set the delay waiting time after receiving RS485 command (default: 400)
300 )))
301
302 (((
303 (% style="color:#037691" %)**AT+CRCCHECK **(%%)**:**  Get or set to receive and verify RS485 sensor data (0: Disable,1:CRC16_MODBUS) (default: 1)
304 )))
305
306 (((
307 (% style="color:#037691" %)**AT+SCHEDULE **(%%)**:**  Each TDC sends command data to the receiver.
308 )))
309
310 (((
311 (% style="color:#037691" %)**AT+CFGDEV **(%%)**:**  Instantly send RS485 commands to the receiver.
312 )))
313
314 (((
315 (% style="color:#037691" %)**AT+RS485 **(%%)**:             **Send commands to the local RS485 device.
316 )))
317
318 (((
319 (% style="color:#037691" %)**AT+MOD **(%%)**:**  Get or set the host send mode.(default: 0)
320 )))
321 )))
322 )))
323
324 (((
325
326 )))
327
328 (((
329
330 )))
331
332 (((
333 (% style="color:#4f81bd" %)**Example 1:**
334 )))
335
336 (((
337 **AT+SEND=01020304 **will send a payload of 01020304
338 )))
339
340 (((
341
342
343
344 )))
345
346 (((
347 (((
348 (% style="color:#4f81bd" %)**Example 2: **
349 )))
350
351 (((
352 **AT+INTMOD=aa**  (0:Disable,1:falling or rising,2:falling,3:rising) (default: 2)
353 )))
354 )))
355
356 (((
357 (((
358 RS485-LN support external Interrupt uplink since hardware v1.2 release.
359 )))
360
361 [[image:image-20220704104958-6.png]]
362
363 (((
364 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 lora packet.
365 )))
366 )))
367
368 (((
369
370
371
372 )))
373
374 (((
375 (((
376 (% style="color:#4f81bd" %)**Example 3: **
377 )))
378
379 (((
380 **AT+SCHEDULE: **This command will be sent to Group RX during each transmission, Max command length is 14 bytes. The grammar is:
381 )))
382
383 (((
384 AT+SCHEDULE =xx xx xx xx xx xx xx xx xx xx xx xx,m
385 )))
386
387 (((
388 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
389 )))
390
391 (((
392 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
393 )))
394
395 (((
396 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.
397 )))
398 )))
399
400 (((
401
402 )))
403
404 (((
405
406 )))
407
408 (((
409 (((
410 (% style="color:#4f81bd" %)**Example 4: **
411 )))
412
413 (((
414 **AT+CFGDEV :** This command will be sent to Group RX.
415 )))
416
417 (((
418 The grammar is:
419 )))
420
421 (((
422 AT+CFGDEV =xx xx xx xx xx xx xx xx xx xx xx xx,m
423 )))
424
425 (((
426 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
427 )))
428
429 (((
430 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
431 )))
432 )))
433
434 (((
435
436
437
438 (((
439 (% style="color:#4f81bd" %)**Example 5：**(%%)** **
440 )))
441 )))
442
443 (((
444 **AT+RS485:** This command will be sent to local RS485 device.
445 )))
446
447 (((
448 The grammar is:
449 )))
450
451 (((
452 AT+RS485 =xx xx xx xx xx xx xx xx xx xx xx xx,m
453 )))
454
455 (((
456 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
457 )))
458
459 (((
460 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
461 )))
462
463
464
465 (((
466 (% style="color:#4f81bd" %)**Example 6：**
467 )))
468
469 (((
470 **AT+MOD=0**  Commands are transparently transmitted through UART.
471 )))
472
473 (((
474 **AT+MOD=1,500**  Commands are transparently transmitted through RS485. 500 ms after the first character is received from RS485, all characters are commands.
475 )))
476
477
478
479 (((
480 (% style="color:#4f81bd" %)**Example 7：**
481 )))
482
483 (((
484 **AT+GROUPMOD=0**  Set to point to point mode
485 )))
486
487 (((
488 **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
489 )))
490
491 (((
492 **AT+GROUPMOD=1,bb**   Set to the RX group controlled by the TX group, numbered bb(The maximum value of bb is 8)
493 )))
494
495
496 (((
497 **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
498 )))
499
500 (((
501 **AT+GROUPMOD=1,1**  Set the RX group numbered 1
502 )))
503
504 (((
505 **AT+GROUPMOD=1,2**  Set the RX group numbered 2
506 )))
507
508
509
510 = **5.  Data Format** =
511
512
513 (((
514 8 bytes of GROUPID +n payload + 4 bytes of checksum
515 )))
516
517
518 (((
519 Payload(S12, SF11, SF10 maximum length is 59, SF9 maximum length is 123, SF8, SF7 maximum length is 230):
520 )))
521
522 (% border="1" cellspacing="10" style="background-color:#f7faff; color:black; width:430px" %)
523 |=(% style="width: 60px;" %)**Size (bytes)**|=(% style="width: 60px;" %)**1**|=(% style="width: 60px;" %)**1**|=(% style="width: 60px;" %)**1**|=(% style="width: 80px;" %)**1**|=(% style="width: 100px;" %)**payloadsize**
524 |(% style="width:100px" %)**Value**|(% style="width:71px" %)address|(% style="width:71px" %)request|(% style="width:49px" %)ACK|(% style="width:99px" %)payloadsize|(% style="width:139px" %)(((
525 command data or
526
527 return data
528 )))
529
530 (((
531 (% style="color:#037691" %)**The first byte：      **(%%)00 is the broadcast address, 01-08 is the RX group number
532 )))
533
534 (((
535 (% style="color:#037691" %)**The second byte：**(%%) send request when not 0, not request when it is 0
536 )))
537
538 (((
539 (% style="color:#037691" %)**The third byte：**(%%)  ACK returned to the sender.
540 )))
541
542 (((
543 (% style="color:#037691" %)**The fourth byte：**(%%)  The command length of the sender or the data length of the RS485 sensor returned by the receiver.
544 )))
545
546 (((
547 (% style="color:#037691" %)**The Fifth byte：**(%%)  RS485 command or RS485 return data.
548 )))
549
550
551 (((
552
553 )))
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