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Version 12.3 by Xiaoling on 2022/07/04 10:55
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1 = **1.  point to point** =
2
3 == **1.1  Overview** ==
4
5 (((
6 [[image:1656901825798-483.png]]
7
8
9 == **1.2  Configure** ==
10
11
12 (% style="color:blue" %)**A's configuration:  ** **B's configuration:**
13
14 AT+GROUPMOD=0  AT+GROUPMOD=0
15
16 AT+GROUPID=12345678  AT+GROUPID=12345678
17
18 AT+TXCHS=868700000  AT+TXCHS=869000000
19
20 AT+RXCHS=869000000  AT+RXCHS=868700000
21
22 AT+CFGDEV=01 03 00 00 00 04,1  AT+CFGDEV=01 03 00 00 00 02,1
23
24 or                                                                                         or
25
26 AT+COMMAND=01 03 00 00 00 04,1  AT+COMMAND=01 03 00 00 00 02,1
27 )))
28
29
30
31 == **1.3  Serial port display** ==
32
33
34 [[image:image-20220704103422-2.png||height="430" width="817"]]
35
36 A sends a command to B to query B's RS485 sensor data and display it on A's upper computer.
37
38 Similarly, B sends a command to A to query A's RS485 sensor data and display it on B's upper computer.
39
40
41 [[image:image-20220704103502-3.png]]
42
43 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)
44
45
46
47 == **2.2  Point To Mult-Point ** ==
48
49 === **2.2.1  Overview** ===
50
51
52 [[image:1656901541427-229.png]]
53
54
55 === **2.2.2  Configure** ===
56
57
58 (% style="color:blue" %)**Configuration of the TX group:**
59
60 AT+GROUPMOD=0,2
61
62 AT+GROUPID=12345678
63
64 AT+TXCHS=868700000
65
66 AT+RXCHS=869000000
67
68 AT+CFGDEV=01 03 00 00 00 02,1
69
70 or
71
72 AT+COMMAND=01 03 00 00 00 02,1
73
74
75 (% style="color:blue" %)**Configuration for RX group number 1:**
76
77 AT+GROUPMOD=1,1
78
79 AT+GROUPID=12345678
80
81 AT+TXCHS=869000000
82
83 AT+RXCHS=868700000
84
85
86 (% style="color:blue" %)**Configuration for RX group number 2:**
87
88 AT+GROUPMOD=1,2
89
90 AT+GROUPID=12345678
91
92 AT+TXCHS=869000000
93
94 AT+RXCHS=868700000
95
96
97
98 === **2.2.3 Serial port display** ===
99
100 (% id="cke_bm_79849S" style="display:none" %) [[image:1656901280202-290.png]]
101
102
103 [[image:image-20220704103658-4.png||height="495" width="852"]]
104
105 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" %)
106
107 (% style="display:none" %) (%%)
108
109
110 [[image:image-20220704103658-5.png]]
111
112 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)
113
114 (% style="display:none" %) (%%)
115
116 (% style="display:none" %) (%%)
117
118 == **2.3 AT command** ==
119
120 (% style="display:none" %) (%%)
121
122 ATZ :Trig a reset of the MCU
123
124 AT+FDR :Reset Parameters to Factory Default, Keys Reserve
125
126 AT+FCU :Get or Set the Frame (% style="display:none" %) (%%)Counter Uplink
127
128 AT+FCD :Get or Set the Frame (% style="display:none" %) (%%)Counter Downlink
129
130 AT+TXP :Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
131
132 AT+SYNC :Get or Set the Sync (% style="display:none" %) (%%)word [1:0x34,0:0x12] (default is 1)
133
134 AT+PMB :Get or Set the preamble (default:8)
135
136 AT+TXCHS :Get or Set the transmit frequency of TX (default:868700000)
137
138 AT+TXSF :Get or Set the spreading factor of TX (7 to 12) (default:12)
139
140 AT+RXCHS :Get or Set the transmit frequency of RX (default:869000000)
141
142 AT+RXSF :Get or Set the spreading factor of RX (7 to 12) (default:12)
143
144 AT+BW :Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
145
146 AT+CR :Get or Set the coding rate [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] (default:1)
147
148 AT+TDC :Get or set the application data transmission interval in ms(default 10 minutes)
149
150 AT+VER :get firmware version number
151
152 AT+SEND :Set Custom sent hex data
153
154 AT+GROUPMOD :Set or Get the grouping mode of the device (default: 0)
155
156 AT+GROUPID : (% style="display:none" %) (%%)Set or Get the password for matching between TX group and RX group, which can be composed of numbers or characters (default: 12345678)(% style="display:none" %)
157
158
159 (((
160 (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
161 )))
162
163 (((
164 (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
165 )))
166
167 (((
168 (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Co(% style="display:none" %) (%%)unter Uplink
169 )))
170
171 (((
172 (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
173 )))
174
175 (((
176 (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
177 )))
178
179 (((
180 (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
181 )))
182
183 (((
184 (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
185 )))
186
187 (((
188 (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
189 )))
190
191 (((
192 (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
193 )))
194
195 (((
196 (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
197 )))
198
199 (((
200 (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
201 )))
202
203 (((
204 (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
205 )))
206
207 (((
208 (% 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)
209 )))
210
211 (((
212 (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
213 )))
214
215 (((
216 (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
217 )))
218
219 (((
220 (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
221 )))
222
223 (((
224 (% style="color:#037691" %)**AT+GROUPMOD **(%%)**:  **Set or Get the grouping (% style="display:none" %) (%%)mode of the device (default: 0)
225 )))
226
227 (((
228 (((
229 (% 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" %)
230
231 (% style="color:#037691" %)**AT+INTMOD **(%%)**:**  Get or Set the trigger interrupt mode
232
233 (% style="color:#037691" %)**AT+BAUDR **(%%)**:**  Get or set the baud rate of rs485. (default: 9600)
234
235 (% style="color:#037691" %)**AT+DATABIT **(%%)**:**  Get or Set databit(7:7 bits,8:8 bits) of rs485 (default: 8)
236
237 (% style="color:#037691" %)**AT+PARITY **(%%)**:  **Get or Set parity(0:none,1:odd,2:even) of rs485(default: 0)
238
239 (% style="color:#037691" %)**AT+STOPBIT **(%%)**:  **Get or Set stopbit(0:1 bit,1:1.5 bit,2:2 bit) of rs485(default: 0)
240
241 (% style="color:#037691" %)**AT+CMDDL **(%%)**:**  Get or Set the delay waiting time after receiving RS485 command (default: 400)
242
243 (% style="color:#037691" %)**AT+CRCCHECK **(%%)**:**  Get or set to receive and verify RS485 sensor data (0: Disable,1:CRC16_MODBUS) (default: 1)
244
245 (% style="color:#037691" %)**AT+SCHEDULE **(%%)**:**  Each TDC sends command data to the receiver.
246
247 (% style="color:#037691" %)**AT+CFGDEV **(%%)**:**  Instantly send RS485 commands to the receiver.
248
249 (% style="color:#037691" %)**AT+RS485 **(%%)**:  **Send commands to the local RS485 device.
250
251 (% style="color:#037691" %)**AT+MOD **(%%)**:**  Get or set the host send mode.(default: 0)
252 )))
253 )))
254
255 (((
256
257 )))
258
259 (((
260
261 )))
262
263 (((
264
265 )))
266
267 (((
268
269 )))
270
271 (((
272 (% style="color:#4f81bd" %)**Example 1:**
273 )))
274
275 (((
276 **AT+SEND=01020304 **will send a payload of 01020304
277 )))
278
279 (((
280
281 )))
282
283 (((
284 (% style="color:#4f81bd" %)**Example 2: **
285
286 **AT+INTMOD=aa**  (0:Disable,1:falling or rising,2:falling,3:rising) (default: 2)
287 )))
288
289 (((
290 RS485-LN support external Interrupt uplink since hardware v1.2 release.
291
292 [[image:image-20220704104958-6.png]]
293
294 Connect the Interrupt pin to RS485-LN INT port and connect the GND pin to V- port. When there
295
296 is a high voltage (Max 24v) on INT pin. Device will send an lora packet.
297 )))
298
299 (((
300
301 )))
302
303 (((
304 (% style="color:#4f81bd" %)**Example 3: **
305
306
307 **AT+SCHEDULE: **This command will be sent to Group RX during each transmission, Max command length is 14 bytes. The grammar is:
308
309 AT+SCHEDULE =xx xx xx xx xx xx xx xx xx xx xx xx,m
310
311 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
312
313 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
314
315 For example, if we have a RS485 sensor. The command to get sensor value is: 01 03 0B B8 00 02
316
317 46 0A. Where 01 03 0B B8 00 02 is the Modbus command to read the register 0B B8 where
318
319 stored the sensor value. The 46 0A is the CRC-16/MODBUS which calculate manually.
320 )))
321
322 (((
323
324 )))
325
326 (((
327
328 )))
329
330 (((
331 (% style="color:#4f81bd" %)**Example 4: **
332
333
334 **AT+CFGDEV :** This command will be sent to Group RX.
335
336 The grammar is:
337
338 AT+CFGDEV =xx xx xx xx xx xx xx xx xx xx xx xx,m
339
340 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
341
342 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
343 )))
344
345 (((
346
347
348
349 (% style="color:#4f81bd" %)**Example 5：**(%%)** **
350 )))
351
352 **AT+RS485:** This command will be sent to local RS485 device.
353
354 The grammar is:
355
356 AT+RS485 =xx xx xx xx xx xx xx xx xx xx xx xx,m
357
358 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
359
360 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
361
362
363
364 (% style="color:#4f81bd" %)**Example 6：**
365
366 **AT+MOD=0**  Commands are transparently transmitted through UART.
367
368 **AT+MOD=1,500**  Commands are transparently transmitted through RS485. 500 ms after the first character is received from RS485, all characters are commands.
369
370
371
372 (% style="color:#4f81bd" %)**Example 7：**
373
374 **AT+GROUPMOD=0**  Set to point to point mode
375
376 **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
377
378 **AT+GROUPMOD=1,bb**   Set to the RX group controlled by the TX group, numbered bb(The maximum value of bb is 8)
379
380
381 **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
382
383 **AT+GROUPMOD=1,1**  Set the RX group numbered 1
384
385 **AT+GROUPMOD=1,2**  Set the RX group numbered 2
386
387
388
389 (% style="color:#4f81bd" %)**Example 8：**
390
391
392 (% style="color:#4f81bd" %)**Example 9：**
393
394
395
396 == **2.4 Data Format** ==
397
398 (((
399 8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
400 )))
401
402 (((
403
404 )))
405
406 (((
407 (% style="color:#4f81bd" %)**Payload:**
408 )))
409
410 (% border="1" style="background-color:#f7faff; color:black; width:938px" %)
411 |=(% style="width: 123px;" %)(((
412 **Size (bytes)**
413 )))|=(% style="width: 107px;" %)(((
414 1
415 )))|=(% style="width: 107px;" %)(((
416 1
417 )))|=(% style="width: 107px;" %)(((
418 1
419 )))|=(% style="width: 107px;" %)(((
420 1
421 )))|=(% style="width: 107px;" %)(((
422 1
423 )))|=(% style="width: 107px;" %)(((
424 1
425 )))|=(% style="width: 107px;" %)(((
426 1
427 )))|=(% style="width: 107px;" %)(((
428 1
429 )))|=(% style="width: 107px;" %)(((
430 1
431 )))
432 |(% style="width:123px" %)(((
433 **Value**
434 )))|(% style="width:38px" %)(((
435 address
436 )))|(% style="width:70px" %)(((
437 request
438 )))|(% style="width:52px" %)(((
439 ACK
440 )))|(% style="width:127px" %)(((
441 (((
442 DI1&
443 )))
444
445 (((
446 DI1 level
447 )))
448 )))|(% style="width:101px" %)(((
449 DI1TODO1
450 )))|(% style="width:91px" %)(((
451 DI1TORO1
452 )))|(% style="width:111px" %)(((
453 (((
454 DI2&
455 )))
456
457 (((
458 DI2 level
459 )))
460 )))|(% style="width:105px" %)(((
461 DI2TODO2
462 )))|(% style="width:106px" %)(((
463 DI2TORO2
464 )))
465
466 (((
467 (% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
468 )))
469
470 (((
471 (% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
472 )))
473
474 (((
475 (% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
476 )))
477
478 (((
479 (((
480 (% style="color:#037691" %)**The fourth byte**(%%)**:**  the high four bits are 1 to represent DI1, and the low four bits are the level of DI1 when the interrupt is triggered.
481 )))
482 )))
483
484 (((
485 (% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
486 )))
487
488 (((
489 (% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
490 )))
491
492 (((
493 (((
494 (% style="color:#037691" %)**The seventh byte**(%%)**:**  the high four bits are 2 to represent DI2, and the low four bits are the level of DI2 when the interrupt is triggered.
495 )))
496 )))
497
498 (((
499 (% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
500 )))
501
502 (((
503 (% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
504 )))