Version 15.3 by Xiaoling on 2022/06/02 14:52
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1 {{box cssClass="floatinginfobox" title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
4
5 = **1. Overview** =
6
7 (((
8 Shipped LT-22222-L is base on LoRaWAN protocol. We also develop a open source Point to Point LoRa protocol for LT-22222-L. The source code and hex file can be found at:
9 )))
10
11 (((
12 [[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
13 )))
14
15 == ==
16
17 = **2. Features for this firmware** =
18
19
20 == **2.1  Point To Point** ==
21
22 === **2.1.1 Overview** ===
23
24 [[image:image-20220602111219-1.png||height="472" width="972"]]
25
26
27 === **2.2.2 Configure** ===
28
29
30 (% border="1" style="background-color:#f7faff; color:black; width:500px" %)
31 |=**A's configuration**|=**B's configuration**
32 |AT+GROUPMOD=0|AT+GROUPMOD=0
33 |AT+TXCHS=868700000|AT+TXCHS=869000000
34 |AT+RXCHS=869000000|AT+RXCHS=868700000
35 |AT+TRIG1=2,50|AT+TRIG1=2,50
36 |AT+TRIG2=2,50|AT+TRIG2=2,50
37 |AT+DI1TODO1=2|AT+DI1TODO1=2
38 |AT+DI1TORO1=2|AT+DI1TORO1=2
39 |AT+DI2TODO2=2 |AT+DI2TODO2=2
40 |AT+DI2TORO2=2|AT+DI2TORO2=2
41
42
43
44 === **2.2.3 Serial port display** ===
45
46
47 (% class="wikigeneratedid" %)
48 [[image:image-20220602111219-2.png]]
49
50
51 (% class="wikigeneratedid" %)
52 [[image:image-20220602111219-3.png]]
53
54 (% class="wikigeneratedid" %)
55 If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 6 seconds, and the UplinkCounter of the retransmission will not increase.
56
57
58 == **2.2  Point To Mult-Point ** ==
59
60 === **2.2.1 Overview** ===
61
62
63 [[image:1654152390874-192.png]]
64
65
66 === **2.2.2  Configure** ===
67
68
69 (% style="color:#4f81bd" %)**Configuration of the TX group:**
70
71 AT+GROUPMOD=0,2
72
73 AT+TXCHS=868700000
74
75 AT+RXCHS=869000000
76
77 AT+TRIG1=2,50
78
79 AT+TRIG2=2,50
80
81 AT+DI1TODO1=1
82
83 AT+DI1TORO1=1
84
85 AT+DI2TODO2=1
86
87 AT+DI2TORO2=1
88
89
90 (% style="color:#4f81bd" %)**Configuration for RX group number 1:**
91
92 AT+GROUPMOD=1,1
93
94 AT+TXCHS=869000000
95
96 AT+RXCHS=868700000
97
98
99 (% style="color:#4f81bd" %)**Configuration for RX group number 2:**
100
101 AT+GROUPMOD=1,2
102
103 AT+TXCHS=869000000
104
105 AT+RXCHS=868700000
106
107
108 === **2.2.3 Serial port display** ===
109
110
111 [[image:image-20220602144747-1.png]]
112
113
114 [[image:image-20220602144747-2.png]]
115
116 (((
117 If the TX group does not receive all the ACK replies from the RX group, it will retransmit up to 4 times, each time interval is 30 seconds, and the retransmission UplinkCounter will not increase.
118 )))
119
120
121
122
123 == **2.3 AT command** ==
124
125
126 (((
127 (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
128 )))
129
130 (((
131 (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
132 )))
133
134 (((
135 (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Counter Uplink
136 )))
137
138 (((
139 (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
140 )))
141
142 (((
143 (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
144 )))
145
146 (((
147 (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
148 )))
149
150 (((
151 (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
152 )))
153
154 (((
155 (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
156 )))
157
158 (((
159 (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
160 )))
161
162 (((
163 (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
164 )))
165
166 (((
167 (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
168 )))
169
170 (((
171 (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
172 )))
173
174 (((
175 (% 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)
176 )))
177
178 (((
179 (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
180 )))
181
182 (((
183 (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
184 )))
185
186 (((
187 (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
188 )))
189
190 (((
191 (% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0)
192 )))
193
194 (((
195 (((
196 (% style="color:#037691" %)**AT+GROUPID **(%%)**:      **Set or Get the password for matching between TX group and RX group, which can be composed of numbers or characters (default: 12345678)
197 )))
198 )))
199
200 (((
201 (% style="color:#037691" %)**AT+TRIG1 **(%%)**:**  Set or Get the DI1 pin interrupt trigger mode (default 0,0)
202 )))
203
204 (((
205 (% style="color:#037691" %)**AT+TRIG2 **(%%)**:            **Set or Get the DI2 pin interrupt trigger mode (default 0,0)
206 )))
207
208 (((
209 (% style="color:#037691" %)**AT+DI1TODO1 **(%%)**:    **Set or get the mode in which DI1 maps to DO1 (default 0)
210 )))
211
212 (((
213 (% style="color:#037691" %)**AT+DI1TORO1 **(%%)**:    **Set or get the mode in which DI1 maps to RO1(default 0)
214 )))
215
216 (((
217 (% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:**  Set or get the mode in which DI2 maps to DO2(default 0)
218 )))
219
220 (((
221 (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
222 )))
223
224 (((
225
226 )))
227
228 (((
229
230 )))
231
232 (((
233 (% style="color:#4f81bd" %)**Example 1:**
234 )))
235
236 (((
237 **AT+SEND=01020304 **will send a payload of 01020304
238 )))
239
240 (((
241
242 )))
243
244 (((
245 (% style="color:#4f81bd" %)**Example 2: **
246 )))
247
248 (((
249 **AT+TRIGx=a    **Trigger directly without triggering time
250 )))
251
252 (((
253 **AT+TRIGx=a,b**
254 )))
255
256 (((
257 a=0: falling edge;
258 )))
259
260 (((
261 a=1: rising edge;
262 )))
263
264 (((
265 a=2: falling edge or rising edge;
266 )))
267
268 (((
269 b:  triggering time in milliseconds.
270 )))
271
272 (((
273 AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
274 )))
275
276 (((
277
278 )))
279
280 (((
281 (% style="color:#4f81bd" %)**Example 3: **
282 )))
283
284 (((
285 **AT+DI1TODO1= maps value**
286 )))
287
288 (((
289 **AT+DI1TORO1= maps value**
290 )))
291
292 (((
293 **AT+DI2TODO2= maps value**
294 )))
295
296 (((
297 **AT+DI2TORO2= maps value**
298 )))
299
300 (((
301
302 )))
303
304 (% border="1" style="background-color:#f7faff; color:black; width:706px" %)
305 |=(% style="width: 102px;" %)(((
306 Maps value
307 )))|=(% style="width: 331px;" %)(((
308 DIx to DOx
309 )))|=(% style="width: 268px;" %)(((
310 DIx to ROx
311 )))
312 |(% style="width:102px" %)(((
313 0
314 )))|(% style="width:331px" %)(((
315 No Action
316 )))|(% style="width:268px" %)(((
317 No Action
318 )))
319 |(% style="width:102px" %)(((
320 1
321 )))|(% style="width:331px" %)(((
322 If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
323 )))|(% style="width:268px" %)(((
324 (((
325 If DIx is high, control ROx to close,
326 )))
327
328 (((
329 if DIx is low, control ROx to open
330 )))
331 )))
332 |(% style="width:102px" %)(((
333 2
334 )))|(% style="width:331px" %)(((
335 If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
336 )))|(% style="width:268px" %)(((
337 (((
338 If DIx is high, control ROx to open,
339 )))
340
341 (((
342 if DIx is low, control ROx to close
343 )))
344 )))
345 |(% style="width:102px" %)(((
346 3
347 )))|(% style="width:331px" %)(((
348 DOx state flip
349 )))|(% style="width:268px" %)(((
350 ROx state flip
351 )))
352
353 (((
354 (% style="color:#4f81bd" %)**Example 4: **
355 )))
356
357 (((
358 **AT+GROUPMOD=0**  Set to point to point mode
359 )))
360
361 (((
362 **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
363 )))
364
365 (((
366 (((
367 **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
368 )))
369 )))
370
371 (((
372 **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
373 )))
374
375 (((
376 **AT+GROUPMOD=1,1**  Set the RX group numbered 1
377 )))
378
379 (((
380 **AT+GROUPMOD=1,2**  Set the RX group numbered 2
381 )))
382
383
384 == **2.4 Data Format** ==
385
386 (((
387 8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
388 )))
389
390 (((
391
392 )))
393
394 (((
395 (% style="color:#4f81bd" %)**Payload:**
396 )))
397
398 (% border="1" style="background-color:#f7faff; color:black; width:938px" %)
399 |=(% style="width: 123px;" %)(((
400 **Size (bytes)**
401 )))|=(% style="width: 107px;" %)(((
402 1
403 )))|=(% style="width: 107px;" %)(((
404 1
405 )))|=(% style="width: 107px;" %)(((
406 1
407 )))|=(% style="width: 107px;" %)(((
408 1
409 )))|=(% style="width: 107px;" %)(((
410 1
411 )))|=(% style="width: 107px;" %)(((
412 1
413 )))|=(% style="width: 107px;" %)(((
414 1
415 )))|=(% style="width: 107px;" %)(((
416 1
417 )))|=(% style="width: 107px;" %)(((
418 1
419 )))
420 |(% style="width:123px" %)(((
421 **Value**
422 )))|(% style="width:38px" %)(((
423 address
424 )))|(% style="width:70px" %)(((
425 request
426 )))|(% style="width:52px" %)(((
427 ACK
428 )))|(% style="width:127px" %)(((
429 (((
430 DI1&
431 )))
432
433 (((
434 DI1 level
435 )))
436 )))|(% style="width:101px" %)(((
437 DI1TODO1
438 )))|(% style="width:91px" %)(((
439 DI1TORO1
440 )))|(% style="width:111px" %)(((
441 (((
442 DI2&
443 )))
444
445 (((
446 DI2 level
447 )))
448 )))|(% style="width:105px" %)(((
449 DI2TODO2
450 )))|(% style="width:106px" %)(((
451 DI2TORO2
452 )))
453
454 (((
455 (% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
456 )))
457
458 (((
459 (% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
460 )))
461
462 (((
463 (% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
464 )))
465
466 (((
467 (((
468 (% 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.
469 )))
470 )))
471
472 (((
473 (% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
474 )))
475
476 (((
477 (% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
478 )))
479
480 (((
481 (((
482 (% 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.
483 )))
484 )))
485
486 (((
487 (% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
488 )))
489
490 (((
491 (% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
492 )))
493
494

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