Last modified by Edwin Chen on 2022/11/22 09:38
<
From version < 12.2 >
edited by Xiaoling
on 2022/06/02 14:46
To version < 20.1 >
edited by Bei Jinggeng
on 2022/11/15 10:27
>
Change comment: There is no comment for this version

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Title
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1 - Point to Point Communication of LT-22222-L
1 +Point to Point Communication of LT-22222-L
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
... ... @@ -1,10 +1,15 @@
1 -{{box cssClass="floatinginfobox" title="**Contents**"}}
1 +**Table of Contents： **
2 +
2 2  {{toc/}}
3 -{{/box}}
4 4  
5 -= **1. Overview** =
6 6  
6 +
7 +
8 += 1. Overview =
9 +
7 7  (((
11 +
12 +
8 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 9  )))
10 10  
... ... @@ -12,37 +12,36 @@
12 12  [[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
13 13  )))
14 14  
15 -== ==
16 16  
17 -= **2. Features for this firmware** =
21 += 2. Features for this firmware =
18 18  
23 +== 2.1  Point To Point ==
19 19  
20 -== **2.1  Point To Point** ==
25 +=== 2.1.1 Overview ===
21 21  
22 -=== **2.1.1 Overview** ===
23 23  
24 24  [[image:image-20220602111219-1.png||height="472" width="972"]]
25 25  
26 26  
27 -=== **2.2.2 Configure** ===
31 +=== 2.2.2 Configure ===
28 28  
29 -(% border="1" style="background-color:#f7faff; color:black; width:500px" %)
30 -|=**A's configuration**|=**B's configuration**
31 -|AT+GROUPMOD=0|AT+GROUPMOD=0
32 -|AT+TXCHS=868700000|AT+TXCHS=869000000
33 -|AT+RXCHS=869000000|AT+RXCHS=868700000
34 -|AT+TRIG1=2,50|AT+TRIG1=2,50
35 -|AT+TRIG2=2,50|AT+TRIG2=2,50
36 -|AT+DI1TODO1=2|AT+DI1TODO1=2
37 -|AT+DI1TORO1=2|AT+DI1TORO1=2
38 -|AT+DI2TODO2=2 |AT+DI2TODO2=2
39 -|AT+DI2TORO2=2|AT+DI2TORO2=2
40 40  
34 +(% border="1" style="background-color:#f7faff; color:black; width:360px" %)
35 +|=(% style="width: 179px;" %)**A's configuration**|=(% style="width: 177px;" %)**B's configuration**
36 +|(% style="width:179px" %)AT+GROUPMOD=0|(% style="width:177px" %)AT+GROUPMOD=0
37 +|(% style="width:179px" %)AT+TXCHS=868700000|(% style="width:177px" %)AT+TXCHS=869000000
38 +|(% style="width:179px" %)AT+RXCHS=869000000|(% style="width:177px" %)AT+RXCHS=868700000
39 +|(% style="width:179px" %)AT+TRIG1=2,50|(% style="width:177px" %)AT+TRIG1=2,50
40 +|(% style="width:179px" %)AT+TRIG2=2,50|(% style="width:177px" %)AT+TRIG2=2,50
41 +|(% style="width:179px" %)AT+DI1TODO1=2|(% style="width:177px" %)AT+DI1TODO1=2
42 +|(% style="width:179px" %)AT+DI1TORO1=2|(% style="width:177px" %)AT+DI1TORO1=2
43 +|(% style="width:179px" %)AT+DI2TODO2=2 |(% style="width:177px" %)AT+DI2TODO2=2
44 +|(% style="width:179px" %)AT+DI2TORO2=2|(% style="width:177px" %)AT+DI2TORO2=2
41 41  
42 -(% class="wikigeneratedid" %)
43 -2.2.3 Serial port display
44 44  
47 +=== 2.2.3 Serial port display ===
45 45  
49 +
46 46  (% class="wikigeneratedid" %)
47 47  [[image:image-20220602111219-2.png]]
48 48  
... ... @@ -50,23 +50,76 @@
50 50  (% class="wikigeneratedid" %)
51 51  [[image:image-20220602111219-3.png]]
52 52  
57 +
53 53  (% class="wikigeneratedid" %)
54 54  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.
55 55  
56 56  
62 +== 2.2  Point To Mult-Point ==
57 57  
58 -== **2.2  Point To Mult-Point ** ==
64 +=== 2.2.1 Overview ===
59 59  
60 60  
67 +[[image:1654152390874-192.png]]
61 61  
62 62  
70 +=== 2.2.2  Configure ===
63 63  
72 +
73 +(% style="color:blue" %)**Configuration of the TX group:**
74 +
75 +AT+GROUPMOD=0,2
76 +
77 +AT+TXCHS=868700000
78 +
79 +AT+RXCHS=869000000
80 +
81 +AT+TRIG1=2,50
82 +
83 +AT+TRIG2=2,50
84 +
85 +AT+DI1TODO1=1
86 +
87 +AT+DI1TORO1=1
88 +
89 +AT+DI2TODO2=1
90 +
91 +AT+DI2TORO2=1
92 +
93 +
94 +(% style="color:blue" %)**Configuration for RX group number 1:**
95 +
96 +AT+GROUPMOD=1,1
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+TXCHS=869000000
108 +
109 +AT+RXCHS=868700000
110 +
111 +
112 +=== 2.2.3 Serial port display ===
113 +
114 +
115 +[[image:image-20220602144747-1.png]]
116 +
117 +
118 +[[image:image-20220602144747-2.png]]
119 +
120 +
64 64  (((
65 -
122 +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.
66 66  )))
67 67  
68 68  
69 -== **2.3 AT command** ==
126 +== 2.3 AT command ==
70 70  
71 71  
72 72  (((
... ... @@ -167,28 +167,18 @@
167 167  (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
168 168  )))
169 169  
170 -(((
171 -
172 -)))
173 173  
174 174  (((
175 -
229 +(% style="color:blue" %)**Example 1:**
176 176  )))
177 177  
178 178  (((
179 -(% style="color:#4f81bd" %)**Example 1:**
180 -)))
181 -
182 -(((
183 183  **AT+SEND=01020304 **will send a payload of 01020304
184 184  )))
185 185  
186 -(((
187 -
188 -)))
189 189  
190 190  (((
191 -(% style="color:#4f81bd" %)**Example 2: **
238 +(% style="color:blue" %)**Example 2: **
192 192  )))
193 193  
194 194  (((
... ... @@ -200,31 +200,28 @@
200 200  )))
201 201  
202 202  (((
203 -a=0: falling edge;
250 +**a=0:** falling edge;
204 204  )))
205 205  
206 206  (((
207 -a=1: rising edge;
254 +**a=1: **rising edge;
208 208  )))
209 209  
210 210  (((
211 -a=2: falling edge or rising edge;
258 +**a=2:** falling edge or rising edge;
212 212  )))
213 213  
214 214  (((
215 -b:  triggering time in milliseconds.
262 +**b:**  triggering time in milliseconds.
216 216  )))
217 217  
218 218  (((
219 -AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
266 +**AT+TRIGx=2,50**  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
220 220  )))
221 221  
222 -(((
223 -
224 -)))
225 225  
226 226  (((
227 -(% style="color:#4f81bd" %)**Example 3: **
271 +(% style="color:blue" %)**Example 3: **
228 228  )))
229 229  
230 230  (((
... ... @@ -247,12 +247,12 @@
247 247  
248 248  )))
249 249  
250 -(% border="1" style="background-color:#f7faff; color:black; width:706px" %)
294 +(% border="1" style="background-color:#f7faff; color:black; width:690px" %)
251 251  |=(% style="width: 102px;" %)(((
252 252  Maps value
253 253  )))|=(% style="width: 331px;" %)(((
254 254  DIx to DOx
255 -)))|=(% style="width: 268px;" %)(((
299 +)))|=(% style="width: 251px;" %)(((
256 256  DIx to ROx
257 257  )))
258 258  |(% style="width:102px" %)(((
... ... @@ -259,7 +259,7 @@
259 259  0
260 260  )))|(% style="width:331px" %)(((
261 261  No Action
262 -)))|(% style="width:268px" %)(((
306 +)))|(% style="width:251px" %)(((
263 263  No Action
264 264  )))
265 265  |(% style="width:102px" %)(((
... ... @@ -266,7 +266,7 @@
266 266  1
267 267  )))|(% style="width:331px" %)(((
268 268  If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
269 -)))|(% style="width:268px" %)(((
313 +)))|(% style="width:251px" %)(((
270 270  (((
271 271  If DIx is high, control ROx to close,
272 272  )))
... ... @@ -279,7 +279,7 @@
279 279  2
280 280  )))|(% style="width:331px" %)(((
281 281  If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
282 -)))|(% style="width:268px" %)(((
326 +)))|(% style="width:251px" %)(((
283 283  (((
284 284  If DIx is high, control ROx to open,
285 285  )))
... ... @@ -292,12 +292,14 @@
292 292  3
293 293  )))|(% style="width:331px" %)(((
294 294  DOx state flip
295 -)))|(% style="width:268px" %)(((
339 +)))|(% style="width:251px" %)(((
296 296  ROx state flip
297 297  )))
298 298  
299 299  (((
300 -(% style="color:#4f81bd" %)**Example 4: **
344 +
345 +
346 +(% style="color:blue" %)**Example 4: **
301 301  )))
302 302  
303 303  (((
... ... @@ -309,10 +309,8 @@
309 309  )))
310 310  
311 311  (((
312 -(((
313 313  **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
314 314  )))
315 -)))
316 316  
317 317  (((
318 318  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
... ... @@ -327,73 +327,272 @@
327 327  )))
328 328  
329 329  
330 -== **2.4 Data Format** ==
374 +=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3) ===
331 331  
332 -(((
333 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
376 +
377 +**AT+TRIGx=a          **Trigger transmit directly without triggering time
378 +
379 +**AT+TRIGx=a,b**  Trigger transmit with triggering time threshold
380 +
381 +**AT+TRIGx=a,b,c    **Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
382 +
383 +
384 +**a=0:** falling edge;
385 +
386 +**a=1:** rising edge;
387 +
388 +**a=2:** falling edge or rising edge;
389 +
390 +**b:**  triggering time in milliseconds.
391 +
392 +**c:** transmit interval
393 +
394 +
395 +(% style="color:blue" %)**Use Case 1**(%%):  Once the DI1 port status change ( either from low to high or high to low, LT1 sends a trigger to LT-2)
396 +
397 +**Command:**
398 +
399 +**AT+TRIG1=2,50**  Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
400 +
401 +
402 +(% style="color:blue" %)**Use Case 2:  **(%%)Sync LT2 RO / DO status with LT1 every minute.
403 +
404 +**Command:**
405 +
406 +**AT+TRIG2=2,50,60**  Once there is falling edge or rising edge on DI2 of LT1, LT1 will transmit trigger to LT2 and LT2 can sync the status of RO/DO.
407 +
408 +
409 +=== 2.3.2 RO/DO is configured in the receiver LT (LT2)(Since firmware 1.3) ===
410 +
411 +
412 +AT+DI1TODO1= maps value[,latch time]
413 +
414 +AT+DI1TORO1= maps value[,latch time]
415 +
416 +AT+DI2TODO2= maps value[,latch time]
417 +
418 +AT+DI2TORO2= maps value[,latch time]
419 +
420 +
421 +(% border="1" style="background-color:#f7faff; color:black; width:774px" %)
422 +|(% style="width:105px" %) **Maps value**|(% style="width:415px" %)**DIx to DOx**|(% style="width:249px" %)**DIx to ROx**
423 +|(% style="width:105px" %)0|(% style="width:415px" %)No Action|(% style="width:249px" %)No Action
424 +|(% style="width:105px" %)1|(% style="width:415px" %)If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level|(% style="width:249px" %)(((
425 +If DIx is high, control ROx to close,
426 +
427 +if DIx is low, control ROx to open
334 334  )))
429 +|(% style="width:105px" %)2|(% style="width:415px" %)If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level|(% style="width:249px" %)(((
430 +If DIx is high, control ROx to open,
335 335  
432 +if DIx is low, control ROx to close
433 +)))
434 +|(% style="width:105px" %)3|(% style="width:415px" %)DOx state flip|(% style="width:249px" %)ROx state flip
435 +
436 +latch time, if latch time is defined, DO or RO will go back to the original status after latch time, if there is a new trigger comes, the LT2 will use the new latch time settings and ignore the old one.
437 +
438 +
439 +(% style="color:blue" %)**Case1**:
440 +
441 +AT+DI1TODO1=1  ~/~/ LT2 DO1 will follow LT1 DI1 trigger command, if DI1 of LT1 is trigger high, DO1 of LT2 will output low, if DI1 of LT1 is trigger low, DO2 of LT2 will output high.
442 +
443 +
444 +(% style="color:blue" %)**Case2**:
445 +
446 +AT+DI1TODO1=1,60  ~/~/ LT2 DO1 will follow LT1 DI1 trigger command, DO1 will keep the status 60 seconds and then go back to original state.
447 +
448 +
449 +=== 2.3.3 Save the RO/DO status during power off(Since firmware 1.3) ===
450 +
451 +
452 +Enable/Disbale retain Digital Output/Relay Output after power off / Power On
453 +
454 +**AT+DOROSAVE=0**  ~/~/ Disable Retain after power off/on
455 +
456 +**AT+DOROSAVE=1**  ~/~/ Enable Retain after power off/on
457 +
458 +**AT+DOROSAVE=2,a,b,c,d**  ~/~/ set DO/RO port to default state after power on.
459 +
460 +**a: **for DO1
461 +
462 +**b:** for DO2
463 +
464 +**c: **for RO1
465 +
466 +**d:** for RO2.
467 +
468 +
469 +**Example:**
470 +
471 +AT+DOROSAVE=2,0,0,0,1  ~/~/ Set DO1/DO2 to Low, RO1 to open after power on , set RO2 to close after power on.
472 +
473 +
474 +=== 2.3.4 Control Sleep status.(Since firmware 1.3) ===
475 +
476 +
477 +DI2 can be used to set LT into sleep mode.
478 +
479 +**AT+DI2SLEEP=1**  ~/~/  Enable DI2 as Sleep pin
480 +
481 +**AT+DI2SLEEP=0**  ~/~/  Disable DI2 as Sleep pin
482 +
483 +When DI2 is enabled as sleep pin, a falling trigger (with 500ms pulse) will set LT into sleep mode. A raising trigger will wake up it again.
484 +
485 +
486 +== 2.4 Data Format ==
487 +
488 +
336 336  (((
337 -
490 +8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
338 338  )))
339 339  
340 340  (((
341 -(% style="color:#4f81bd" %)**Payload:**
494 +(% style="color:blue" %)**Payload:**
342 342  )))
343 343  
344 -(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
345 -|=(% style="width: 123px;" %)(((
497 +(% border="1" style="background-color:#f7faff; color:black; width:825px" %)
498 +|=(% style="width: 102px;" %)(((
346 346  **Size (bytes)**
347 -)))|=(% style="width: 107px;" %)(((
500 +)))|=(% style="width: 74px;" %)(((
348 348  1
349 -)))|=(% style="width: 107px;" %)(((
502 +)))|=(% style="width: 72px;" %)(((
350 350  1
351 -)))|=(% style="width: 107px;" %)(((
504 +)))|=(% style="width: 47px;" %)(((
352 352  1
353 -)))|=(% style="width: 107px;" %)(((
506 +)))|=(% style="width: 83px;" %)(((
354 354  1
355 -)))|=(% style="width: 107px;" %)(((
508 +)))|=(% style="width: 90px;" %)(((
356 356  1
357 -)))|=(% style="width: 107px;" %)(((
510 +)))|=(% style="width: 92px;" %)(((
358 358  1
359 -)))|=(% style="width: 107px;" %)(((
512 +)))|=(% style="width: 78px;" %)(((
360 360  1
361 -)))|=(% style="width: 107px;" %)(((
514 +)))|=(% style="width: 91px;" %)(((
362 362  1
363 -)))|=(% style="width: 107px;" %)(((
516 +)))|=(% style="width: 91px;" %)(((
364 364  1
365 365  )))
366 -|(% style="width:123px" %)(((
519 +|(% style="width:102px" %)(((
367 367  **Value**
368 -)))|(% style="width:38px" %)(((
521 +)))|(% style="width:74px" %)(((
369 369  address
370 -)))|(% style="width:70px" %)(((
523 +)))|(% style="width:72px" %)(((
371 371  request
372 -)))|(% style="width:52px" %)(((
525 +)))|(% style="width:47px" %)(((
373 373  ACK
374 -)))|(% style="width:127px" %)(((
527 +)))|(% style="width:83px" %)(((
375 375  (((
376 376  DI1&
377 -)))
378 -
379 -(((
380 380  DI1 level
381 381  )))
382 -)))|(% style="width:101px" %)(((
532 +)))|(% style="width:90px" %)(((
383 383  DI1TODO1
384 -)))|(% style="width:91px" %)(((
534 +)))|(% style="width:92px" %)(((
385 385  DI1TORO1
386 -)))|(% style="width:111px" %)(((
536 +)))|(% style="width:78px" %)(((
387 387  (((
388 388  DI2&
539 +DI2 leve
389 389  )))
541 +)))|(% style="width:91px" %)(((
542 +DI2TODO2
543 +)))|(% style="width:91px" %)(((
544 +DI2TORO2
545 +)))
390 390  
391 391  (((
392 -DI2 level
548 +(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
393 393  )))
394 -)))|(% style="width:105px" %)(((
550 +
551 +(((
552 +(% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
553 +)))
554 +
555 +(((
556 +(% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
557 +)))
558 +
559 +(((
560 +(((
561 +(% 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.
562 +)))
563 +)))
564 +
565 +(((
566 +(% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
567 +)))
568 +
569 +(((
570 +(% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
571 +)))
572 +
573 +(((
574 +(((
575 +(% 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.
576 +)))
577 +)))
578 +
579 +(((
580 +(% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
581 +)))
582 +
583 +(((
584 +(% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
585 +)))
586 +
587 +(((
588 +
589 +
590 +(% style="color:blue" %)**Payload:（Since firmware 1.3）The receiver replies to the sent packet**
591 +)))
592 +
593 +(% border="1" style="background-color:#f7faff; color:black; width:822px" %)
594 +|=(% style="width: 97px;" %)(((
595 +**Size(bytes)**
596 +)))|=(% style="width: 71px;" %)(((
597 +1
598 +)))|=(% style="width: 70px;" %)(((
599 +1
600 +)))|=(% style="width: 48px;" %)(((
601 +1
602 +)))|=(% style="width: 85px;" %)(((
603 +1
604 +)))|=(% style="width: 90px;" %)(((
605 +1
606 +)))|=(% style="width: 88px;" %)(((
607 +1
608 +)))|=(% style="width: 86px;" %)(((
609 +1
610 +)))|=(% style="width: 92px;" %)(((
611 +1
612 +)))|=(% style="width: 92px;" %)(((
613 +1
614 +)))
615 +|(% style="width:97px" %)(((
616 +**Value**
617 +)))|(% style="width:71px" %)(((
618 +address
619 +)))|(% style="width:70px" %)(((
620 +request
621 +)))|(% style="width:48px" %)(((
622 +ACK
623 +)))|(% style="width:85px" %)(((
624 +(((
625 +DOI1&
626 +DOI2 level
627 +)))
628 +)))|(% style="width:90px" %)(((
629 +DI1TODO1
630 +)))|(% style="width:88px" %)(((
631 +DI1TORO1
632 +)))|(% style="width:86px" %)(((
633 +(((
634 +RO2&
635 +RO2 level
636 +)))
637 +)))|(% style="width:92px" %)(((
395 395  DI2TODO2
396 -)))|(% style="width:106px" %)(((
639 +)))|(% style="width:92px" %)(((
397 397  DI2TORO2
398 398  )))
399 399  
... ... @@ -411,7 +411,7 @@
411 411  
412 412  (((
413 413  (((
414 -(% 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.
657 +(% style="color:#037691" %)**The fourth byte**(%%)**:**  the high four bits are 1 to represent DOI1, and the low four bits are the level of DOI1 when the interrupt is triggered.
415 415  )))
416 416  )))
417 417  
... ... @@ -425,7 +425,7 @@
425 425  
426 426  (((
427 427  (((
428 -(% 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.
671 +(% style="color:#037691" %)**The seventh byte**(%%)**:**  the high four bits are 2 to represent RO2, and the low four bits are the level of RO2 when the interrupt is triggered.
429 429  )))
430 430  )))
431 431  
1654152390874-192.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.Xiaoling
Size
... ... @@ -1,0 +1,1 @@
1 +287.9 KB
Content
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