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 < 19.2 >
edited by Xiaoling
on 2022/11/15 08:47
>
Change comment: There is no comment for this version

Summary

Details

Page properties
Title
... ... @@ -1,1 +1,1 @@
1 - Point to Point Communication of LT-22222-L
1 +Point to Point Communication of LT-22222-L
Content
... ... @@ -8,6 +8,8 @@
8 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  
... ... @@ -42,6 +42,7 @@
42 42  |AT+DI2TORO2=2|AT+DI2TORO2=2
43 43  
44 44  
47 +
45 45  === **2.2.3 Serial port display** ===
46 46  
47 47  
... ... @@ -52,6 +52,7 @@
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  
... ... @@ -67,7 +67,7 @@
67 67  === **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  
... ... @@ -220,13 +220,7 @@
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 -(((
228 -
229 -)))
230 230  
231 231  (((
232 232  (% style="color:#4f81bd" %)**Example 1:**
... ... @@ -236,12 +236,10 @@
236 236  **AT+SEND=01020304 **will send a payload of 01020304
237 237  )))
238 238  
239 -(((
240 -
241 -)))
242 242  
238 +
243 243  (((
244 -(% style="color:#4f81bd" %)**Example 2: **
240 +(% style="color:blue" %)**Example 2: **
245 245  )))
246 246  
247 247  (((
... ... @@ -272,12 +272,9 @@
272 272  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: **
273 +(% style="color:blue" %)**Example 3: **
281 281  )))
282 282  
283 283  (((
... ... @@ -350,7 +350,7 @@
350 350  )))
351 351  
352 352  (((
353 -(% style="color:#4f81bd" %)**Example 4: **
346 +(% style="color:blue" %)**Example 4: **
354 354  )))
355 355  
356 356  (((
... ... @@ -361,12 +361,12 @@
361 361  **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
362 362  )))
363 363  
357 +
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  
362 +
370 370  (((
371 371  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
372 372  )))
... ... @@ -380,8 +380,118 @@
380 380  )))
381 381  
382 382  
376 +=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3) ===
377 +
378 +
379 +**AT+TRIGx=a     **Trigger transmit directly without triggering time
380 +
381 +**AT+TRIGx=a,b**  Trigger transmit with triggering time threshold
382 +
383 +**AT+TRIGx=a,b,c **Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
384 +
385 +
386 +a=0: falling edge;
387 +
388 +a=1: rising edge;
389 +
390 +a=2: falling edge or rising edge;
391 +
392 +b:  triggering time in milliseconds.
393 +
394 +c: transmit interval
395 +
396 +
397 +**(% 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)
398 +
399 +Command:
400 +
401 +AT+TRIG1=2,50  Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
402 +
403 +
404 +**(% style="color:blue" %)Use Case 2: **(%%)Sync LT2 RO / DO status with LT1 every minute.
405 +
406 +Command:
407 +
408 +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.
409 +
410 +
411 +=== 2.3.2 RO/DO is configured in the receiver LT (LT2)(Since firmware 1.3) ===
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:706px" %)
423 +| **Maps value**|DIx to DOx|DIx to ROx
424 +|0|No Action|No Action
425 +|1|If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level|(((
426 +If DIx is high, control ROx to close,
427 +
428 +if DIx is low, control ROx to open
429 +)))
430 +|2|If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level|(((
431 +If DIx is high, control ROx to open,
432 +
433 +if DIx is low, control ROx to close
434 +)))
435 +|3|DOx state flip|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 +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 +DI2 can be used to set LT into sleep mode.
477 +
478 +AT+DI2SLEEP=1 ~/~/Enable DI2 as Sleep pin
479 +
480 +AT+DI2SLEEP=0 ~/~/Disable DI2 as Sleep pin
481 +
482 +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.
483 +
484 +
383 383  == **2.4 Data Format** ==
384 384  
487 +
385 385  (((
386 386  8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
387 387  )))
... ... @@ -391,7 +391,7 @@
391 391  )))
392 392  
393 393  (((
394 -(% style="color:#4f81bd" %)**Payload:**
497 +(% style="color:blue" %)**Payload:**
395 395  )))
396 396  
397 397  (% border="1" style="background-color:#f7faff; color:black; width:938px" %)
... ... @@ -490,4 +490,106 @@
490 490  (% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
491 491  )))
492 492  
596 +(((
493 493  
598 +
599 +(% style="color:#4f81bd" %)**Payload:（Since firmware 1.3）The receiver replies to the sent packet**
600 +)))
601 +
602 +(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
603 +|=(% style="width: 123px;" %)(((
604 +**Size (bytes)**
605 +)))|=(% style="width: 107px;" %)(((
606 +1
607 +)))|=(% style="width: 107px;" %)(((
608 +1
609 +)))|=(% style="width: 107px;" %)(((
610 +1
611 +)))|=(% style="width: 107px;" %)(((
612 +1
613 +)))|=(% style="width: 107px;" %)(((
614 +1
615 +)))|=(% style="width: 107px;" %)(((
616 +1
617 +)))|=(% style="width: 107px;" %)(((
618 +1
619 +)))|=(% style="width: 107px;" %)(((
620 +1
621 +)))|=(% style="width: 107px;" %)(((
622 +1
623 +)))
624 +|(% style="width:123px" %)(((
625 +**Value**
626 +)))|(% style="width:38px" %)(((
627 +address
628 +)))|(% style="width:70px" %)(((
629 +request
630 +)))|(% style="width:52px" %)(((
631 +ACK
632 +)))|(% style="width:127px" %)(((
633 +(((
634 +DO1&
635 +)))
636 +
637 +(((
638 +DO1 level
639 +)))
640 +)))|(% style="width:101px" %)(((
641 +DI1TODO1
642 +)))|(% style="width:91px" %)(((
643 +DI1TORO1
644 +)))|(% style="width:111px" %)(((
645 +(((
646 +RO2&
647 +)))
648 +
649 +(((
650 +RO2 level
651 +)))
652 +)))|(% style="width:105px" %)(((
653 +DI2TODO2
654 +)))|(% style="width:106px" %)(((
655 +DI2TORO2
656 +)))
657 +
658 +(((
659 +(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
660 +)))
661 +
662 +(((
663 +(% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
664 +)))
665 +
666 +(((
667 +(% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
668 +)))
669 +
670 +(((
671 +(((
672 +(% 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.
673 +)))
674 +)))
675 +
676 +(((
677 +(% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
678 +)))
679 +
680 +(((
681 +(% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
682 +)))
683 +
684 +(((
685 +(((
686 +(% 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.
687 +)))
688 +)))
689 +
690 +(((
691 +(% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
692 +)))
693 +
694 +(((
695 +(% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
696 +)))
697 +
698 +

Applications

Navigation

Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0