Last modified by Edwin Chen on 2022/11/22 09:38
<
From version < 17.1 >
edited by Xiaoling
on 2022/06/02 14:59
To version < 19.4 >
edited by Xiaoling
on 2022/11/15 09:14
>
Change comment: There is no comment for this version

Summary

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Title
... ... @@ -1,1 +1,1 @@
1 - Point to Point Communication of LT-22222-L
1 +Point to Point Communication of LT-22222-L
Content
... ... @@ -1,4 +1,4 @@
1 -**Contents： **
1 +**Table of Contents： **
2 2  
3 3  {{toc/}}
4 4  
... ... @@ -5,9 +5,11 @@
5 5  
6 6  
7 7  
8 -= **1. Overview** =
8 += 1. Overview =
9 9  
10 10  (((
11 +
12 +
11 11  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:
12 12  )))
13 13  
... ... @@ -16,35 +16,36 @@
16 16  )))
17 17  
18 18  
19 -= **2. Features for this firmware** =
21 += 2. Features for this firmware =
20 20  
21 -== **2.1  Point To Point** ==
23 +== 2.1  Point To Point ==
22 22  
23 -=== **2.1.1 Overview** ===
25 +=== 2.1.1 Overview ===
24 24  
25 25  
26 26  [[image:image-20220602111219-1.png||height="472" width="972"]]
27 27  
28 28  
29 -=== **2.2.2 Configure** ===
31 +=== 2.2.2 Configure ===
30 30  
31 31  
32 -(% border="1" style="background-color:#f7faff; color:black; width:500px" %)
33 -|=**A's configuration**|=**B's configuration**
34 -|AT+GROUPMOD=0|AT+GROUPMOD=0
35 -|AT+TXCHS=868700000|AT+TXCHS=869000000
36 -|AT+RXCHS=869000000|AT+RXCHS=868700000
37 -|AT+TRIG1=2,50|AT+TRIG1=2,50
38 -|AT+TRIG2=2,50|AT+TRIG2=2,50
39 -|AT+DI1TODO1=2|AT+DI1TODO1=2
40 -|AT+DI1TORO1=2|AT+DI1TORO1=2
41 -|AT+DI2TODO2=2 |AT+DI2TODO2=2
42 -|AT+DI2TORO2=2|AT+DI2TORO2=2
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
43 43  
44 44  
45 -=== **2.2.3 Serial port display** ===
46 46  
48 +=== 2.2.3 Serial port display ===
47 47  
50 +
48 48  (% class="wikigeneratedid" %)
49 49  [[image:image-20220602111219-2.png]]
50 50  
... ... @@ -52,22 +52,23 @@
52 52  (% class="wikigeneratedid" %)
53 53  [[image:image-20220602111219-3.png]]
54 54  
58 +
55 55  (% class="wikigeneratedid" %)
56 56  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.
57 57  
58 58  
59 -== **2.2  Point To Mult-Point ** ==
63 +== 2.2  Point To Mult-Point ==
60 60  
61 -=== **2.2.1 Overview** ===
65 +=== 2.2.1 Overview ===
62 62  
63 63  
64 64  [[image:1654152390874-192.png]]
65 65  
66 66  
67 -=== **2.2.2  Configure** ===
71 +=== 2.2.2  Configure ===
68 68  
69 69  
70 -(% style="color:#4f81bd" %)**Configuration of the TX group:**
74 +(% style="color:blue" %)**Configuration of the TX group:**
71 71  
72 72  AT+GROUPMOD=0,2
73 73  
... ... @@ -88,7 +88,7 @@
88 88  AT+DI2TORO2=1
89 89  
90 90  
91 -(% style="color:#4f81bd" %)**Configuration for RX group number 1:**
95 +(% style="color:blue" %)**Configuration for RX group number 1:**
92 92  
93 93  AT+GROUPMOD=1,1
94 94  
... ... @@ -97,7 +97,7 @@
97 97  AT+RXCHS=868700000
98 98  
99 99  
100 -(% style="color:#4f81bd" %)**Configuration for RX group number 2:**
104 +(% style="color:blue" %)**Configuration for RX group number 2:**
101 101  
102 102  AT+GROUPMOD=1,2
103 103  
... ... @@ -106,7 +106,7 @@
106 106  AT+RXCHS=868700000
107 107  
108 108  
109 -=== **2.2.3 Serial port display** ===
113 +=== 2.2.3 Serial port display ===
110 110  
111 111  
112 112  [[image:image-20220602144747-1.png]]
... ... @@ -114,12 +114,13 @@
114 114  
115 115  [[image:image-20220602144747-2.png]]
116 116  
121 +
117 117  (((
118 118  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.
119 119  )))
120 120  
121 121  
122 -== **2.3 AT command** ==
127 +== 2.3 AT command ==
123 123  
124 124  
125 125  (((
... ... @@ -220,28 +220,18 @@
220 220  (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
221 221  )))
222 222  
223 -(((
224 -
225 -)))
226 226  
227 227  (((
228 -
230 +(% style="color:blue" %)**Example 1:**
229 229  )))
230 230  
231 231  (((
232 -(% style="color:#4f81bd" %)**Example 1:**
233 -)))
234 -
235 -(((
236 236  **AT+SEND=01020304 **will send a payload of 01020304
237 237  )))
238 238  
239 -(((
240 -
241 -)))
242 242  
243 243  (((
244 -(% style="color:#4f81bd" %)**Example 2: **
239 +(% style="color:blue" %)**Example 2: **
245 245  )))
246 246  
247 247  (((
... ... @@ -253,31 +253,28 @@
253 253  )))
254 254  
255 255  (((
256 -a=0: falling edge;
251 +**a=0:** falling edge;
257 257  )))
258 258  
259 259  (((
260 -a=1: rising edge;
255 +**a=1: **rising edge;
261 261  )))
262 262  
263 263  (((
264 -a=2: falling edge or rising edge;
259 +**a=2:** falling edge or rising edge;
265 265  )))
266 266  
267 267  (((
268 -b:  triggering time in milliseconds.
263 +**b:**  triggering time in milliseconds.
269 269  )))
270 270  
271 271  (((
272 -AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
267 +**AT+TRIGx=2,50**  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
273 273  )))
274 274  
275 -(((
276 -
277 -)))
278 278  
279 279  (((
280 -(% style="color:#4f81bd" %)**Example 3: **
272 +(% style="color:blue" %)**Example 3: **
281 281  )))
282 282  
283 283  (((
... ... @@ -300,12 +300,12 @@
300 300  
301 301  )))
302 302  
303 -(% border="1" style="background-color:#f7faff; color:black; width:706px" %)
295 +(% border="1" style="background-color:#f7faff; color:black; width:690px" %)
304 304  |=(% style="width: 102px;" %)(((
305 305  Maps value
306 306  )))|=(% style="width: 331px;" %)(((
307 307  DIx to DOx
308 -)))|=(% style="width: 268px;" %)(((
300 +)))|=(% style="width: 251px;" %)(((
309 309  DIx to ROx
310 310  )))
311 311  |(% style="width:102px" %)(((
... ... @@ -312,7 +312,7 @@
312 312  0
313 313  )))|(% style="width:331px" %)(((
314 314  No Action
315 -)))|(% style="width:268px" %)(((
307 +)))|(% style="width:251px" %)(((
316 316  No Action
317 317  )))
318 318  |(% style="width:102px" %)(((
... ... @@ -319,7 +319,7 @@
319 319  1
320 320  )))|(% style="width:331px" %)(((
321 321  If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
322 -)))|(% style="width:268px" %)(((
314 +)))|(% style="width:251px" %)(((
323 323  (((
324 324  If DIx is high, control ROx to close,
325 325  )))
... ... @@ -332,7 +332,7 @@
332 332  2
333 333  )))|(% style="width:331px" %)(((
334 334  If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
335 -)))|(% style="width:268px" %)(((
327 +)))|(% style="width:251px" %)(((
336 336  (((
337 337  If DIx is high, control ROx to open,
338 338  )))
... ... @@ -345,12 +345,14 @@
345 345  3
346 346  )))|(% style="width:331px" %)(((
347 347  DOx state flip
348 -)))|(% style="width:268px" %)(((
340 +)))|(% style="width:251px" %)(((
349 349  ROx state flip
350 350  )))
351 351  
352 352  (((
353 -(% style="color:#4f81bd" %)**Example 4: **
345 +
346 +
347 +(% style="color:blue" %)**Example 4: **
354 354  )))
355 355  
356 356  (((
... ... @@ -362,10 +362,8 @@
362 362  )))
363 363  
364 364  (((
365 -(((
366 366  **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
367 367  )))
368 -)))
369 369  
370 370  (((
371 371  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
... ... @@ -380,73 +380,272 @@
380 380  )))
381 381  
382 382  
383 -== **2.4 Data Format** ==
375 +=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3) ===
384 384  
385 -(((
386 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
377 +
378 +**AT+TRIGx=a          **Trigger transmit directly without triggering time
379 +
380 +**AT+TRIGx=a,b**  Trigger transmit with triggering time threshold
381 +
382 +**AT+TRIGx=a,b,c    **Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
383 +
384 +
385 +**a=0:** falling edge;
386 +
387 +**a=1:** rising edge;
388 +
389 +**a=2:** falling edge or rising edge;
390 +
391 +**b:**  triggering time in milliseconds.
392 +
393 +**c:** transmit interval
394 +
395 +
396 +(% 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)
397 +
398 +**Command:**
399 +
400 +**AT+TRIG1=2,50**  Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
401 +
402 +
403 +(% style="color:blue" %)**Use Case 2:  **(%%)Sync LT2 RO / DO status with LT1 every minute.
404 +
405 +**Command:**
406 +
407 +**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.
408 +
409 +
410 +=== 2.3.2 RO/DO is configured in the receiver LT (LT2)(Since firmware 1.3) ===
411 +
412 +
413 +AT+DI1TODO1= maps value[,latch time]
414 +
415 +AT+DI1TORO1= maps value[,latch time]
416 +
417 +AT+DI2TODO2= maps value[,latch time]
418 +
419 +AT+DI2TORO2= maps value[,latch time]
420 +
421 +
422 +(% border="1" style="background-color:#f7faff; color:black; width:774px" %)
423 +|(% style="width:105px" %) **Maps value**|(% style="width:415px" %)**DIx to DOx**|(% style="width:249px" %)**DIx to ROx**
424 +|(% style="width:105px" %)0|(% style="width:415px" %)No Action|(% style="width:249px" %)No Action
425 +|(% 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" %)(((
426 +If DIx is high, control ROx to close,
427 +
428 +if DIx is low, control ROx to open
387 387  )))
430 +|(% 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" %)(((
431 +If DIx is high, control ROx to open,
388 388  
433 +if DIx is low, control ROx to close
434 +)))
435 +|(% style="width:105px" %)3|(% style="width:415px" %)DOx state flip|(% style="width:249px" %)ROx state flip
436 +
437 +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.
438 +
439 +
440 +(% style="color:blue" %)**Case1**:
441 +
442 +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.
443 +
444 +
445 +(% style="color:blue" %)**Case2**:
446 +
447 +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.
448 +
449 +
450 +=== 2.3.3 Save the RO/DO status during power off(Since firmware 1.3) ===
451 +
452 +
453 +Enable/Disbale retain Digital Output/Relay Output after power off / Power On
454 +
455 +**AT+DOROSAVE=0**  ~/~/ Disable Retain after power off/on
456 +
457 +**AT+DOROSAVE=1**  ~/~/ Enable Retain after power off/on
458 +
459 +**AT+DOROSAVE=2,a,b,c,d**  ~/~/ set DO/RO port to default state after power on.
460 +
461 +**a: **for DO1
462 +
463 +**b:** for DO2
464 +
465 +**c: **for RO1
466 +
467 +**d:** for RO2.
468 +
469 +
470 +**Example:**
471 +
472 +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.
473 +
474 +
475 +=== 2.3.4 Control Sleep status.(Since firmware 1.3) ===
476 +
477 +
478 +DI2 can be used to set LT into sleep mode.
479 +
480 +**AT+DI2SLEEP=1**  ~/~/  Enable DI2 as Sleep pin
481 +
482 +**AT+DI2SLEEP=0**  ~/~/  Disable DI2 as Sleep pin
483 +
484 +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.
485 +
486 +
487 +== 2.4 Data Format ==
488 +
489 +
389 389  (((
390 -
491 +8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
391 391  )))
392 392  
393 393  (((
394 -(% style="color:#4f81bd" %)**Payload:**
495 +(% style="color:blue" %)**Payload:**
395 395  )))
396 396  
397 -(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
398 -|=(% style="width: 123px;" %)(((
498 +(% border="1" style="background-color:#f7faff; color:black; width:825px" %)
499 +|=(% style="width: 102px;" %)(((
399 399  **Size (bytes)**
400 -)))|=(% style="width: 107px;" %)(((
501 +)))|=(% style="width: 74px;" %)(((
401 401  1
402 -)))|=(% style="width: 107px;" %)(((
503 +)))|=(% style="width: 72px;" %)(((
403 403  1
404 -)))|=(% style="width: 107px;" %)(((
505 +)))|=(% style="width: 47px;" %)(((
405 405  1
406 -)))|=(% style="width: 107px;" %)(((
507 +)))|=(% style="width: 83px;" %)(((
407 407  1
408 -)))|=(% style="width: 107px;" %)(((
509 +)))|=(% style="width: 90px;" %)(((
409 409  1
410 -)))|=(% style="width: 107px;" %)(((
511 +)))|=(% style="width: 92px;" %)(((
411 411  1
412 -)))|=(% style="width: 107px;" %)(((
513 +)))|=(% style="width: 78px;" %)(((
413 413  1
414 -)))|=(% style="width: 107px;" %)(((
515 +)))|=(% style="width: 91px;" %)(((
415 415  1
416 -)))|=(% style="width: 107px;" %)(((
517 +)))|=(% style="width: 91px;" %)(((
417 417  1
418 418  )))
419 -|(% style="width:123px" %)(((
520 +|(% style="width:102px" %)(((
420 420  **Value**
421 -)))|(% style="width:38px" %)(((
522 +)))|(% style="width:74px" %)(((
422 422  address
423 -)))|(% style="width:70px" %)(((
524 +)))|(% style="width:72px" %)(((
424 424  request
425 -)))|(% style="width:52px" %)(((
526 +)))|(% style="width:47px" %)(((
426 426  ACK
427 -)))|(% style="width:127px" %)(((
528 +)))|(% style="width:83px" %)(((
428 428  (((
429 429  DI1&
430 -)))
431 -
432 -(((
433 433  DI1 level
434 434  )))
435 -)))|(% style="width:101px" %)(((
533 +)))|(% style="width:90px" %)(((
436 436  DI1TODO1
437 -)))|(% style="width:91px" %)(((
535 +)))|(% style="width:92px" %)(((
438 438  DI1TORO1
439 -)))|(% style="width:111px" %)(((
537 +)))|(% style="width:78px" %)(((
440 440  (((
441 441  DI2&
540 +DI2 leve
442 442  )))
542 +)))|(% style="width:91px" %)(((
543 +DI2TODO2
544 +)))|(% style="width:91px" %)(((
545 +DI2TORO2
546 +)))
443 443  
444 444  (((
445 -DI2 level
549 +(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
446 446  )))
447 -)))|(% style="width:105px" %)(((
551 +
552 +(((
553 +(% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
554 +)))
555 +
556 +(((
557 +(% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
558 +)))
559 +
560 +(((
561 +(((
562 +(% 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.
563 +)))
564 +)))
565 +
566 +(((
567 +(% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
568 +)))
569 +
570 +(((
571 +(% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
572 +)))
573 +
574 +(((
575 +(((
576 +(% 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.
577 +)))
578 +)))
579 +
580 +(((
581 +(% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
582 +)))
583 +
584 +(((
585 +(% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
586 +)))
587 +
588 +(((
589 +
590 +
591 +(% style="color:blue" %)**Payload:（Since firmware 1.3）The receiver replies to the sent packet**
592 +)))
593 +
594 +(% border="1" style="background-color:#f7faff; color:black; width:822px" %)
595 +|=(% style="width: 97px;" %)(((
596 +**Size(bytes)**
597 +)))|=(% style="width: 71px;" %)(((
598 +1
599 +)))|=(% style="width: 70px;" %)(((
600 +1
601 +)))|=(% style="width: 48px;" %)(((
602 +1
603 +)))|=(% style="width: 85px;" %)(((
604 +1
605 +)))|=(% style="width: 90px;" %)(((
606 +1
607 +)))|=(% style="width: 88px;" %)(((
608 +1
609 +)))|=(% style="width: 86px;" %)(((
610 +1
611 +)))|=(% style="width: 92px;" %)(((
612 +1
613 +)))|=(% style="width: 92px;" %)(((
614 +1
615 +)))
616 +|(% style="width:97px" %)(((
617 +**Value**
618 +)))|(% style="width:71px" %)(((
619 +address
620 +)))|(% style="width:70px" %)(((
621 +request
622 +)))|(% style="width:48px" %)(((
623 +ACK
624 +)))|(% style="width:85px" %)(((
625 +(((
626 +DO1&
627 +DO1 level
628 +)))
629 +)))|(% style="width:90px" %)(((
630 +DI1TODO1
631 +)))|(% style="width:88px" %)(((
632 +DI1TORO1
633 +)))|(% style="width:86px" %)(((
634 +(((
635 +RO2&
636 +RO2 level
637 +)))
638 +)))|(% style="width:92px" %)(((
448 448  DI2TODO2
449 -)))|(% style="width:106px" %)(((
640 +)))|(% style="width:92px" %)(((
450 450  DI2TORO2
451 451  )))
452 452  
... ... @@ -464,7 +464,7 @@
464 464  
465 465  (((
466 466  (((
467 -(% 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.
658 +(% style="color:#037691" %)**The fourth byte**(%%)**:**  the high four bits are 1 to represent DO1, and the low four bits are the level of DO1 when the interrupt is triggered.
468 468  )))
469 469  )))
470 470  
... ... @@ -478,7 +478,7 @@
478 478  
479 479  (((
480 480  (((
481 -(% 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.
672 +(% 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.
482 482  )))
483 483  )))
484 484  

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