Last modified by Xiaoling on 2022/07/04 11:22
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1 **Table of Contents：**
2
3 {{toc/}}
4
5
6
7
8
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 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)
60 )))
61
62
63
64 = **2.  Point To Mult-Point ** =
65
66 == **2.1  Overview** ==
67
68
69 [[image:1656901541427-229.png]]
70
71
72 == **2.2  Configure** ==
73
74
75 (% style="color:blue" %)**Configuration of the TX group:**
76
77 AT+GROUPMOD=0,2
78
79 AT+GROUPID=12345678
80
81 AT+TXCHS=868700000
82
83 AT+RXCHS=869000000
84
85 AT+CFGDEV=01 03 00 00 00 02,1
86
87 or
88
89 AT+COMMAND=01 03 00 00 00 02,1
90
91
92 (% style="color:blue" %)**Configuration for RX group number 1:**
93
94 AT+GROUPMOD=1,1
95
96 AT+GROUPID=12345678
97
98 AT+TXCHS=869000000
99
100 AT+RXCHS=868700000
101
102
103 (% style="color:blue" %)**Configuration for RX group number 2:**
104
105 AT+GROUPMOD=1,2
106
107 AT+GROUPID=12345678
108
109 AT+TXCHS=869000000
110
111 AT+RXCHS=868700000
112
113
114
115 == **2.3  Serial port display** ==
116
117 (% id="cke_bm_79849S" style="display:none" %) [[image:1656901280202-290.png]]
118
119
120 [[image:image-20220704103658-4.png||height="495" width="852"]]
121
122 (((
123 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" %)
124 )))
125
126 (% style="display:none" %) (%%)
127
128
129 [[image:image-20220704103658-5.png]]
130
131 (((
132 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)
133 )))
134
135 (% style="display:none" %) (%%)
136
137 (% style="display:none" %) (%%)
138
139 = **3.  AT command** =
140
141 (% style="display:none" %) (%%) (% style="display:none" %)
142
143 (((
144 (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
145 )))
146
147 (((
148 (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
149 )))
150
151 (((
152 (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Co(% style="display:none" %) (%%)unter Uplink
153 )))
154
155 (((
156 (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
157 )))
158
159 (((
160 (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
161 )))
162
163 (((
164 (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
165 )))
166
167 (((
168 (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
169 )))
170
171 (((
172 (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
173 )))
174
175 (((
176 (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
177 )))
178
179 (((
180 (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
181 )))
182
183 (((
184 (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
185 )))
186
187 (((
188 (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
189 )))
190
191 (((
192 (% 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)
193 )))
194
195 (((
196 (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
197 )))
198
199 (((
200 (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
201 )))
202
203 (((
204 (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
205 )))
206
207 (((
208 (% style="color:#037691" %)**AT+GROUPMOD **(%%)**:   **Set or Get the grouping (% style="display:none" %) (%%)mode of the device (default: 0)
209 )))
210
211 (((
212 (((
213 (% 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" %)
214
215 (((
216 (% style="color:#037691" %)**AT+INTMOD **(%%)**:**  Get or Set the trigger interrupt mode
217 )))
218
219 (((
220 (% style="color:#037691" %)**AT+BAUDR **(%%)**:**  Get or set the baud rate of rs485. (default: 9600)
221 )))
222
223 (((
224 (% style="color:#037691" %)**AT+DATABIT **(%%)**:**  Get or Set databit(7:7 bits,8:8 bits) of rs485 (default: 8)
225 )))
226
227 (((
228 (% style="color:#037691" %)**AT+PARITY **(%%)**:           **Get or Set parity(0:none,1:odd,2:even) of rs485(default: 0)
229 )))
230
231 (((
232 (% style="color:#037691" %)**AT+STOPBIT **(%%)**:         **Get or Set stopbit(0:1 bit,1:1.5 bit,2:2 bit) of rs485(default: 0)
233 )))
234
235 (((
236 (% style="color:#037691" %)**AT+CMDDL **(%%)**:**  Get or Set the delay waiting time after receiving RS485 command (default: 400)
237 )))
238
239 (((
240 (% style="color:#037691" %)**AT+CRCCHECK **(%%)**:**  Get or set to receive and verify RS485 sensor data (0: Disable,1:CRC16_MODBUS) (default: 1)
241 )))
242
243 (((
244 (% style="color:#037691" %)**AT+SCHEDULE **(%%)**:**  Each TDC sends command data to the receiver.
245 )))
246
247 (((
248 (% style="color:#037691" %)**AT+CFGDEV **(%%)**:**  Instantly send RS485 commands to the receiver.
249 )))
250
251 (((
252 (% style="color:#037691" %)**AT+RS485 **(%%)**:             **Send commands to the local RS485 device.
253 )))
254
255 (((
256 (% style="color:#037691" %)**AT+MOD **(%%)**:**  Get or set the host send mode.(default: 0)
257 )))
258 )))
259 )))
260
261 (((
262
263 )))
264
265 (((
266
267 )))
268
269 (((
270 (% style="color:#4f81bd" %)**Example 1:**
271 )))
272
273 (((
274 **AT+SEND=01020304 **will send a payload of 01020304
275 )))
276
277 (((
278
279
280
281 )))
282
283 (((
284 (((
285 (% style="color:#4f81bd" %)**Example 2: **
286 )))
287
288 (((
289 **AT+INTMOD=aa**  (0:Disable,1:falling or rising,2:falling,3:rising) (default: 2)
290 )))
291 )))
292
293 (((
294 (((
295 RS485-LN support external Interrupt uplink since hardware v1.2 release.
296 )))
297
298 [[image:image-20220704104958-6.png]]
299
300 (((
301 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.
302 )))
303 )))
304
305 (((
306
307
308
309 )))
310
311 (((
312 (((
313 (% style="color:#4f81bd" %)**Example 3: **
314 )))
315
316 (((
317 **AT+SCHEDULE: **This command will be sent to Group RX during each transmission, Max command length is 14 bytes. The grammar is:
318 )))
319
320 (((
321 AT+SCHEDULE =xx xx xx xx xx xx xx xx xx xx xx xx,m
322 )))
323
324 (((
325 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
326 )))
327
328 (((
329 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
330 )))
331
332 (((
333 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.
334 )))
335 )))
336
337 (((
338
339 )))
340
341 (((
342
343 )))
344
345 (((
346 (((
347 (% style="color:#4f81bd" %)**Example 4: **
348 )))
349
350 (((
351 **AT+CFGDEV :** This command will be sent to Group RX.
352 )))
353
354 (((
355 The grammar is:
356 )))
357
358 (((
359 AT+CFGDEV =xx xx xx xx xx xx xx xx xx xx xx xx,m
360 )))
361
362 (((
363 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
364 )))
365
366 (((
367 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
368 )))
369 )))
370
371 (((
372
373
374
375 (((
376 (% style="color:#4f81bd" %)**Example 5：**(%%)** **
377 )))
378 )))
379
380 (((
381 **AT+RS485:** This command will be sent to local RS485 device.
382 )))
383
384 (((
385 The grammar is:
386 )))
387
388 (((
389 AT+RS485 =xx xx xx xx xx xx xx xx xx xx xx xx,m
390 )))
391
392 (((
393 xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
394 )))
395
396 (((
397 m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command.
398 )))
399
400
401
402 (((
403 (% style="color:#4f81bd" %)**Example 6：**
404 )))
405
406 (((
407 **AT+MOD=0**  Commands are transparently transmitted through UART.
408 )))
409
410 (((
411 **AT+MOD=1,500**  Commands are transparently transmitted through RS485. 500 ms after the first character is received from RS485, all characters are commands.
412 )))
413
414
415
416 (((
417 (% style="color:#4f81bd" %)**Example 7：**
418 )))
419
420 (((
421 **AT+GROUPMOD=0**  Set to point to point mode
422 )))
423
424 (((
425 **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
426 )))
427
428 (((
429 **AT+GROUPMOD=1,bb**   Set to the RX group controlled by the TX group, numbered bb(The maximum value of bb is 8)
430 )))
431
432
433 (((
434 **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
435 )))
436
437 (((
438 **AT+GROUPMOD=1,1**  Set the RX group numbered 1
439 )))
440
441 (((
442 **AT+GROUPMOD=1,2**  Set the RX group numbered 2
443 )))
444
445
446
447 = **4.  Data Format** =
448
449
450 (((
451 8 bytes of GROUPID +n payload + 4 bytes of checksum
452 )))
453
454
455 (((
456 Payload(S12, SF11, SF10 maximum length is 59, SF9 maximum length is 123, SF8, SF7 maximum length is 230):
457 )))
458
459 (% border="1" cellspacing="10" style="background-color:#f7faff; color:black; width:430px" %)
460 |=(% 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**
461 |(% style="width:100px" %)**Value**|(% style="width:71px" %)address|(% style="width:71px" %)request|(% style="width:49px" %)ACK|(% style="width:99px" %)payloadsize|(% style="width:139px" %)(((
462 command data or
463
464 return data
465 )))
466
467 (((
468 (% style="color:#037691" %)**The first byte：      **(%%)00 is the broadcast address, 01-08 is the RX group number
469 )))
470
471 (((
472 (% style="color:#037691" %)**The second byte：**(%%) send request when not 0, not request when it is 0
473 )))
474
475 (((
476 (% style="color:#037691" %)**The third byte：**(%%)  ACK returned to the sender.
477 )))
478
479 (((
480 (% style="color:#037691" %)**The fourth byte：**(%%)  The command length of the sender or the data length of the RS485 sensor returned by the receiver.
481 )))
482
483 (((
484 (% style="color:#037691" %)**The Fifth byte：**(%%)  RS485 command or RS485 return data.
485 )))
486
487
488 (((
489
490 )))

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