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Version 12.12 by Xiaoling on 2022/07/04 11:16
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1 = **1.  point to point** =
2
3 == **1.1  Overview** ==
4
5 (((
6 [[image:1656901825798-483.png]]
7
8
9
10 == **1.2  Configure** ==
11
12
13 (% style="color:blue" %)**A's configuration:  ** **B's configuration:**
14
15 AT+GROUPMOD=0  AT+GROUPMOD=0
16
17 AT+GROUPID=12345678  AT+GROUPID=12345678
18
19 AT+TXCHS=868700000  AT+TXCHS=869000000
20
21 AT+RXCHS=869000000  AT+RXCHS=868700000
22
23 AT+CFGDEV=01 03 00 00 00 04,1  AT+CFGDEV=01 03 00 00 00 02,1
24
25 or  or
26
27 AT+COMMAND=01 03 00 00 00 04,1  AT+COMMAND=01 03 00 00 00 02,1
28 )))
29
30
31
32 == **1.3  Serial port display** ==
33
34
35 [[image:image-20220704103422-2.png||height="430" width="817"]]
36
37 (((
38 A sends a command to B to query B's RS485 sensor data and display it on A's upper computer.
39 )))
40
41 (((
42 Similarly, B sends a command to A to query A's RS485 sensor data and display it on B's upper computer.
43 )))
44
45
46 [[image:image-20220704103502-3.png]]
47
48 (((
49 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)
50 )))
51
52
53
54 == **2.2  Point To Mult-Point ** ==
55
56 === **2.2.1  Overview** ===
57
58
59 [[image:1656901541427-229.png]]
60
61
62 === **2.2.2  Configure** ===
63
64
65 (% style="color:blue" %)**Configuration of the TX group:**
66
67 AT+GROUPMOD=0,2
68
69 AT+GROUPID=12345678
70
71 AT+TXCHS=868700000
72
73 AT+RXCHS=869000000
74
75 AT+CFGDEV=01 03 00 00 00 02,1
76
77 or
78
79 AT+COMMAND=01 03 00 00 00 02,1
80
81
82 (% style="color:blue" %)**Configuration for RX group number 1:**
83
84 AT+GROUPMOD=1,1
85
86 AT+GROUPID=12345678
87
88 AT+TXCHS=869000000
89
90 AT+RXCHS=868700000
91
92
93 (% style="color:blue" %)**Configuration for RX group number 2:**
94
95 AT+GROUPMOD=1,2
96
97 AT+GROUPID=12345678
98
99 AT+TXCHS=869000000
100
101 AT+RXCHS=868700000
102
103
104
105 === **2.2.3 Serial port display** ===
106
107 (% id="cke_bm_79849S" style="display:none" %) [[image:1656901280202-290.png]]
108
109
110 [[image:image-20220704103658-4.png||height="495" width="852"]]
111
112 (((
113 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" %)
114 )))
115
116 (% style="display:none" %) (%%)
117
118
119 [[image:image-20220704103658-5.png]]
120
121 (((
122 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)
123 )))
124
125 (% style="display:none" %) (%%)
126
127 (% style="display:none" %) (%%)
128
129 = **3.  AT command** =
130
131 (% style="display:none" %) (%%) (% style="display:none" %)
132
133 (((
134 (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
135 )))
136
137 (((
138 (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
139 )))
140
141 (((
142 (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Co(% style="display:none" %) (%%)unter Uplink
143 )))
144
145 (((
146 (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
147 )))
148
149 (((
150 (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
151 )))
152
153 (((
154 (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
155 )))
156
157 (((
158 (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
159 )))
160
161 (((
162 (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
163 )))
164
165 (((
166 (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
167 )))
168
169 (((
170 (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
171 )))
172
173 (((
174 (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
175 )))
176
177 (((
178 (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
179 )))
180
181 (((
182 (% 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)
183 )))
184
185 (((
186 (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
187 )))
188
189 (((
190 (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
191 )))
192
193 (((
194 (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
195 )))
196
197 (((
198 (% style="color:#037691" %)**AT+GROUPMOD **(%%)**:  **Set or Get the grouping (% style="display:none" %) (%%)mode of the device (default: 0)
199 )))
200
201 (((
202 (((
203 (% 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" %)
204
205 (((
206 (% style="color:#037691" %)**AT+INTMOD **(%%)**:**  Get or Set the trigger interrupt mode
207 )))
208
209 (((
210 (% style="color:#037691" %)**AT+BAUDR **(%%)**:**  Get or set the baud rate of rs485. (default: 9600)
211 )))
212
213 (((
214 (% style="color:#037691" %)**AT+DATABIT **(%%)**:**  Get or Set databit(7:7 bits,8:8 bits) of rs485 (default: 8)
215 )))
216
217 (((
218 (% style="color:#037691" %)**AT+PARITY **(%%)**:  **Get or Set parity(0:none,1:odd,2:even) of rs485(default: 0)
219 )))
220
221 (((
222 (% style="color:#037691" %)**AT+STOPBIT **(%%)**:  **Get or Set stopbit(0:1 bit,1:1.5 bit,2:2 bit) of rs485(default: 0)
223 )))
224
225 (((
226 (% style="color:#037691" %)**AT+CMDDL **(%%)**:**  Get or Set the delay waiting time after receiving RS485 command (default: 400)
227 )))
228
229 (((
230 (% style="color:#037691" %)**AT+CRCCHECK **(%%)**:**  Get or set to receive and verify RS485 sensor data (0: Disable,1:CRC16_MODBUS) (default: 1)
231 )))
232
233 (((
234 (% style="color:#037691" %)**AT+SCHEDULE **(%%)**:**  Each TDC sends command data to the receiver.
235 )))
236
237 (((
238 (% style="color:#037691" %)**AT+CFGDEV **(%%)**:**  Instantly send RS485 commands to the receiver.
239 )))
240
241 (((
242 (% style="color:#037691" %)**AT+RS485 **(%%)**:  **Send commands to the local RS485 device.
243 )))
244
245 (((
246 (% style="color:#037691" %)**AT+MOD **(%%)**:**  Get or set the host send mode.(default: 0)
247 )))
248 )))
249 )))
250
251 (((
252
253 )))
254
255 (((
256
257 )))
258
259 (((
260 (% style="color:#4f81bd" %)**Example 1:**
261 )))
262
263 (((
264 **AT+SEND=01020304 **will send a payload of 01020304
265 )))
266
267 (((
268
269
270
271 )))
272
273 (((
274 (((
275 (% style="color:#4f81bd" %)**Example 2: **
276 )))
277
278 (((
279 **AT+INTMOD=aa**  (0:Disable,1:falling or rising,2:falling,3:rising) (default: 2)
280 )))
281 )))
282
283 (((
284 (((
285 RS485-LN support external Interrupt uplink since hardware v1.2 release.
286 )))
287
288 [[image:image-20220704104958-6.png]]
289
290 (((
291 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.
292 )))
293 )))
294
295 (((
296
297
298
299 )))
300
301 (((
302 (((
303 (% style="color:#4f81bd" %)**Example 3: **
304 )))
305
306 (((
307
308 )))
309
310 (((
311 **AT+SCHEDULE: **This command will be sent to Group RX during each transmission, Max command length is 14 bytes. The grammar is:
312 )))
313
314 (((
315 AT+SCHEDULE =xx xx xx xx xx xx xx xx xx xx xx xx,m
316 )))
317
318 (((
319 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
320 )))
321
322 (((
323 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
324 )))
325
326 (((
327 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.
328 )))
329 )))
330
331 (((
332
333 )))
334
335 (((
336
337 )))
338
339 (((
340 (((
341 (% style="color:#4f81bd" %)**Example 4: **
342 )))
343
344 (((
345
346 )))
347
348 (((
349 **AT+CFGDEV :** This command will be sent to Group RX.
350 )))
351
352 (((
353 The grammar is:
354 )))
355
356 (((
357 AT+CFGDEV =xx xx xx xx xx xx xx xx xx xx xx xx,m
358 )))
359
360 (((
361 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
362 )))
363
364 (((
365 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
366 )))
367 )))
368
369 (((
370
371
372
373 (((
374 (% style="color:#4f81bd" %)**Example 5：**(%%)** **
375 )))
376 )))
377
378 (((
379 **AT+RS485:** This command will be sent to local RS485 device.
380 )))
381
382 (((
383 The grammar is:
384 )))
385
386 (((
387 AT+RS485 =xx xx xx xx xx xx xx xx xx xx xx xx,m
388 )))
389
390 (((
391 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
392 )))
393
394 (((
395 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
396 )))
397
398
399
400 (((
401 (% style="color:#4f81bd" %)**Example 6：**
402 )))
403
404 (((
405
406 )))
407
408 (((
409 **AT+MOD=0**  Commands are transparently transmitted through UART.
410 )))
411
412 (((
413 **AT+MOD=1,500**  Commands are transparently transmitted through RS485. 500 ms after the first character is received from RS485, all characters are commands.
414 )))
415
416
417
418 (((
419 (% style="color:#4f81bd" %)**Example 7：**
420 )))
421
422 (((
423
424 )))
425
426 (((
427 **AT+GROUPMOD=0**  Set to point to point mode
428 )))
429
430 (((
431 **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
432 )))
433
434 (((
435 **AT+GROUPMOD=1,bb**   Set to the RX group controlled by the TX group, numbered bb(The maximum value of bb is 8)
436 )))
437
438
439 (((
440 **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
441 )))
442
443 (((
444 **AT+GROUPMOD=1,1**  Set the RX group numbered 1
445 )))
446
447 (((
448 **AT+GROUPMOD=1,2**  Set the RX group numbered 2
449 )))
450
451
452
453 = **4.  Data Format** =
454
455
456 (((
457 8 bytes of GROUPID +n payload + 4 bytes of checksum
458 )))
459
460
461 (((
462 Payload(S12, SF11, SF10 maximum length is 59, SF9 maximum length is 123, SF8, SF7 maximum length is 230):
463 )))
464
465 (% border="1" cellspacing="10" style="background-color:#f7faff; color:black; width:430px" %)
466 |=(% 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**
467 |(% style="width:100px" %)**Value**|(% style="width:71px" %)address|(% style="width:71px" %)request|(% style="width:49px" %)ACK|(% style="width:99px" %)payloadsize|(% style="width:139px" %)(((
468 command data or
469
470 return data
471 )))
472
473
474 (((
475 (% style="color:#037691" %)**The first byte：  **(%%)00 is the broadcast address, 01-08 is the RX group number
476 )))
477
478 (((
479 (% style="color:#037691" %)**The second byte：**(%%) send request when not 0, not request when it is 0
480 )))
481
482 (((
483 (% style="color:#037691" %)**The third byte：**(%%)  ACK returned to the sender.
484 )))
485
486 (((
487 (% style="color:#037691" %)**The fourth byte：**(%%)  The command length of the sender or the data length of the RS485 sensor returned by the receiver.
488 )))
489
490 (((
491 (% style="color:#037691" %)**The Fifth byte：**(%%)  RS485 command or RS485 return data.
492 )))
493
494
495 (((
496
497 )))