Last modified by Edwin Chen on 2022/11/22 09:38
<
From version < 23.1 >
edited by Edwin Chen
on 2022/11/16 15:27
To version < 15.1 >
edited by Xiaoling
on 2022/06/02 14:47
>
Change comment: Uploaded new attachment "image-20220602144747-2.png", version {1}

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
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Edwin
1 +XWiki.Xiaoling
Content
... ... @@ -1,15 +1,10 @@
1 -**Table of Contents： **
2 -
1 +{{box cssClass="floatinginfobox" title="**Contents**"}}
3 3  {{toc/}}
3 +{{/box}}
4 4  
5 += **1. Overview** =
5 5  
6 -
7 -
8 -= 1. Overview =
9 -
10 10  (((
11 -
12 -
13 13  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:
14 14  )))
15 15  
... ... @@ -17,33 +17,35 @@
17 17  [[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
18 18  )))
19 19  
15 +== ==
20 20  
21 -= 2. Features for this firmware =
17 += **2. Features for this firmware** =
22 22  
23 -== 2.1  Point To Point ==
24 24  
25 -=== 2.1.1 Overview ===
20 +== **2.1  Point To Point** ==
26 26  
22 +=== **2.1.1 Overview** ===
27 27  
28 28  [[image:image-20220602111219-1.png||height="472" width="972"]]
29 29  
30 30  
31 -=== 2.2.2 Configure ===
27 +=== **2.2.2 Configure** ===
32 32  
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
33 33  
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
45 45  
46 -=== 2.2.3 Serial port display ===
42 +(% class="wikigeneratedid" %)
43 +2.2.3 Serial port display
47 47  
48 48  
49 49  (% class="wikigeneratedid" %)
... ... @@ -53,76 +53,23 @@
53 53  (% class="wikigeneratedid" %)
54 54  [[image:image-20220602111219-3.png]]
55 55  
56 -
57 57  (% class="wikigeneratedid" %)
58 58  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.
59 59  
60 60  
61 -== 2.2  Point To Mult-Point ==
62 62  
63 -=== 2.2.1 Overview ===
58 +== **2.2  Point To Mult-Point ** ==
64 64  
65 65  
66 -[[image:1654152390874-192.png]]
67 67  
68 68  
69 -=== 2.2.2  Configure ===
70 70  
71 -
72 -(% style="color:blue" %)**Configuration of the TX group:**
73 -
74 -AT+GROUPMOD=0,2
75 -
76 -AT+TXCHS=868700000
77 -
78 -AT+RXCHS=869000000
79 -
80 -AT+TRIG1=2,50
81 -
82 -AT+TRIG2=2,50
83 -
84 -AT+DI1TODO1=1
85 -
86 -AT+DI1TORO1=1
87 -
88 -AT+DI2TODO2=1
89 -
90 -AT+DI2TORO2=1
91 -
92 -
93 -(% style="color:blue" %)**Configuration for RX group number 1:**
94 -
95 -AT+GROUPMOD=1,1
96 -
97 -AT+TXCHS=869000000
98 -
99 -AT+RXCHS=868700000
100 -
101 -
102 -(% style="color:blue" %)**Configuration for RX group number 2:**
103 -
104 -AT+GROUPMOD=1,2
105 -
106 -AT+TXCHS=869000000
107 -
108 -AT+RXCHS=868700000
109 -
110 -
111 -=== 2.2.3 Serial port display ===
112 -
113 -
114 -[[image:image-20220602144747-1.png]]
115 -
116 -
117 -[[image:image-20220602144747-2.png]]
118 -
119 -
120 120  (((
121 -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.
65 +
122 122  )))
123 123  
124 124  
125 -== 2.3 AT command ==
69 +== **2.3 AT command** ==
126 126  
127 127  
128 128  (((
... ... @@ -223,18 +223,28 @@
223 223  (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
224 224  )))
225 225  
170 +(((
171 +
172 +)))
226 226  
227 227  (((
228 -(% style="color:blue" %)**Example 1:**
175 +
229 229  )))
230 230  
231 231  (((
179 +(% style="color:#4f81bd" %)**Example 1:**
180 +)))
181 +
182 +(((
232 232  **AT+SEND=01020304 **will send a payload of 01020304
233 233  )))
234 234  
186 +(((
187 +
188 +)))
235 235  
236 236  (((
237 -(% style="color:blue" %)**Example 2: **
191 +(% style="color:#4f81bd" %)**Example 2: **
238 238  )))
239 239  
240 240  (((
... ... @@ -246,28 +246,31 @@
246 246  )))
247 247  
248 248  (((
249 -**a=0:** falling edge;
203 +a=0: falling edge;
250 250  )))
251 251  
252 252  (((
253 -**a=1: **rising edge;
207 +a=1: rising edge;
254 254  )))
255 255  
256 256  (((
257 -**a=2:** falling edge or rising edge;
211 +a=2: falling edge or rising edge;
258 258  )))
259 259  
260 260  (((
261 -**b:**  triggering time in milliseconds.
215 +b:  triggering time in milliseconds.
262 262  )))
263 263  
264 264  (((
265 -**AT+TRIGx=2,50**  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
219 +AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
266 266  )))
267 267  
222 +(((
223 +
224 +)))
268 268  
269 269  (((
270 -(% style="color:blue" %)**Example 3: **
227 +(% style="color:#4f81bd" %)**Example 3: **
271 271  )))
272 272  
273 273  (((
... ... @@ -290,12 +290,12 @@
290 290  
291 291  )))
292 292  
293 -(% border="1" style="background-color:#f7faff; color:black; width:690px" %)
250 +(% border="1" style="background-color:#f7faff; color:black; width:706px" %)
294 294  |=(% style="width: 102px;" %)(((
295 295  Maps value
296 296  )))|=(% style="width: 331px;" %)(((
297 297  DIx to DOx
298 -)))|=(% style="width: 251px;" %)(((
255 +)))|=(% style="width: 268px;" %)(((
299 299  DIx to ROx
300 300  )))
301 301  |(% style="width:102px" %)(((
... ... @@ -302,7 +302,7 @@
302 302  0
303 303  )))|(% style="width:331px" %)(((
304 304  No Action
305 -)))|(% style="width:251px" %)(((
262 +)))|(% style="width:268px" %)(((
306 306  No Action
307 307  )))
308 308  |(% style="width:102px" %)(((
... ... @@ -309,7 +309,7 @@
309 309  1
310 310  )))|(% style="width:331px" %)(((
311 311  If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
312 -)))|(% style="width:251px" %)(((
269 +)))|(% style="width:268px" %)(((
313 313  (((
314 314  If DIx is high, control ROx to close,
315 315  )))
... ... @@ -322,7 +322,7 @@
322 322  2
323 323  )))|(% style="width:331px" %)(((
324 324  If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
325 -)))|(% style="width:251px" %)(((
282 +)))|(% style="width:268px" %)(((
326 326  (((
327 327  If DIx is high, control ROx to open,
328 328  )))
... ... @@ -335,14 +335,12 @@
335 335  3
336 336  )))|(% style="width:331px" %)(((
337 337  DOx state flip
338 -)))|(% style="width:251px" %)(((
295 +)))|(% style="width:268px" %)(((
339 339  ROx state flip
340 340  )))
341 341  
342 342  (((
343 -
344 -
345 -(% style="color:blue" %)**Example 4: **
300 +(% style="color:#4f81bd" %)**Example 4: **
346 346  )))
347 347  
348 348  (((
... ... @@ -354,8 +354,10 @@
354 354  )))
355 355  
356 356  (((
312 +(((
357 357  **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
358 358  )))
315 +)))
359 359  
360 360  (((
361 361  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
... ... @@ -370,274 +370,73 @@
370 370  )))
371 371  
372 372  
373 -=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3) ===
330 +== **2.4 Data Format** ==
374 374  
375 -
376 -**AT+TRIGx=a          **Trigger transmit directly without triggering time
377 -
378 -**AT+TRIGx=a,b**  Trigger transmit with triggering time threshold
379 -
380 -**AT+TRIGx=a,b,c    **Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
381 -
382 -
383 -**a=0:** falling edge;
384 -
385 -**a=1:** rising edge;
386 -
387 -**a=2:** falling edge or rising edge;
388 -
389 -**b:**  triggering time in milliseconds.
390 -
391 -**c:** transmit interval
392 -
393 -
394 -(% 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)
395 -
396 -**Command:**
397 -
398 -**AT+TRIG1=2,50**  Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
399 -
400 -
401 -(% style="color:blue" %)**Use Case 2:  **(%%)Sync LT2 RO / DO status with LT1 every minute.
402 -
403 -**Command:**
404 -
405 -**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. After power off, power on, LT1 will send trigger without falling/rising edge, so the DI changes during power off will be sync as well.
406 -
407 -
408 -=== 2.3.2 RO/DO is configured in the receiver LT (LT2)(Since firmware 1.3) ===
409 -
410 -
411 -AT+DI1TODO1= maps value[,latch time]
412 -
413 -AT+DI1TORO1= maps value[,latch time]
414 -
415 -AT+DI2TODO2= maps value[,latch time]
416 -
417 -AT+DI2TORO2= maps value[,latch time]
418 -
419 -
420 -(% border="1" style="background-color:#f7faff; color:black; width:774px" %)
421 -|(% style="width:105px" %) **Maps value**|(% style="width:415px" %)**DIx to DOx**|(% style="width:249px" %)**DIx to ROx**
422 -|(% style="width:105px" %)0|(% style="width:415px" %)No Action|(% style="width:249px" %)No Action
423 -|(% 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" %)(((
424 -If DIx is high, control ROx to close,
425 -
426 -if DIx is low, control ROx to open
332 +(((
333 +8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
427 427  )))
428 -|(% 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" %)(((
429 -If DIx is high, control ROx to open,
430 430  
431 -if DIx is low, control ROx to close
432 -)))
433 -|(% style="width:105px" %)3|(% style="width:415px" %)DOx state flip|(% style="width:249px" %)ROx state flip
434 -
435 -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.
436 -
437 -
438 -(% style="color:blue" %)**Case1**:
439 -
440 -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.
441 -
442 -
443 -(% style="color:blue" %)**Case2**:
444 -
445 -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.
446 -
447 -
448 -=== 2.3.3 Save the RO/DO status during power off(Since firmware 1.3) ===
449 -
450 -
451 -Enable/Disbale retain Digital Output/Relay Output after power off / Power On
452 -
453 -**AT+DOROSAVE=0**  ~/~/ Disable Retain after power off/on
454 -
455 -**AT+DOROSAVE=1**  ~/~/ Enable Retain after power off/on
456 -
457 -**AT+DOROSAVE=2,a,b,c,d**  ~/~/ set DO/RO port to default state after power on.
458 -
459 -**a: **for DO1
460 -
461 -**b:** for DO2
462 -
463 -**c: **for RO1
464 -
465 -**d:** for RO2.
466 -
467 -
468 -**Example:**
469 -
470 -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.
471 -
472 -
473 -=== 2.3.4 Control Sleep status.(Since firmware 1.3) ===
474 -
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 -In sleep mode, DORO will keep its initial state if AT+DOROSAVE=2, otherwise DORO will be in OFF state
485 -
486 -
487 -== 2.4 Data Format ==
488 -
489 -
490 490  (((
491 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
337 +
492 492  )))
493 493  
494 494  (((
495 -(% style="color:blue" %)**Payload:Payload triggered by TDC or DI**
341 +(% style="color:#4f81bd" %)**Payload:**
496 496  )))
497 497  
498 -(% border="1" style="background-color:#f7faff; color:black; width:825px" %)
499 -|=(% style="width: 102px;" %)(((
344 +(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
345 +|=(% style="width: 123px;" %)(((
500 500  **Size (bytes)**
501 -)))|=(% style="width: 74px;" %)(((
347 +)))|=(% style="width: 107px;" %)(((
502 502  1
503 -)))|=(% style="width: 72px;" %)(((
349 +)))|=(% style="width: 107px;" %)(((
504 504  1
505 -)))|=(% style="width: 47px;" %)(((
351 +)))|=(% style="width: 107px;" %)(((
506 506  1
507 -)))|=(% style="width: 83px;" %)(((
353 +)))|=(% style="width: 107px;" %)(((
508 508  1
509 -)))|=(% style="width: 90px;" %)(((
355 +)))|=(% style="width: 107px;" %)(((
510 510  1
511 -)))|=(% style="width: 92px;" %)(((
357 +)))|=(% style="width: 107px;" %)(((
512 512  1
513 -)))|=(% style="width: 78px;" %)(((
359 +)))|=(% style="width: 107px;" %)(((
514 514  1
515 -)))|=(% style="width: 91px;" %)(((
361 +)))|=(% style="width: 107px;" %)(((
516 516  1
517 -)))|=(% style="width: 91px;" %)(((
363 +)))|=(% style="width: 107px;" %)(((
518 518  1
519 519  )))
520 -|(% style="width:102px" %)(((
366 +|(% style="width:123px" %)(((
521 521  **Value**
522 -)))|(% style="width:74px" %)(((
368 +)))|(% style="width:38px" %)(((
523 523  address
524 -)))|(% style="width:72px" %)(((
370 +)))|(% style="width:70px" %)(((
525 525  request
526 -)))|(% style="width:47px" %)(((
372 +)))|(% style="width:52px" %)(((
527 527  ACK
528 -)))|(% style="width:83px" %)(((
374 +)))|(% style="width:127px" %)(((
529 529  (((
530 530  DI1&
377 +)))
378 +
379 +(((
531 531  DI1 level
532 532  )))
533 -)))|(% style="width:90px" %)(((
382 +)))|(% style="width:101px" %)(((
534 534  DI1TODO1
535 -)))|(% style="width:92px" %)(((
384 +)))|(% style="width:91px" %)(((
536 536  DI1TORO1
537 -)))|(% style="width:78px" %)(((
386 +)))|(% style="width:111px" %)(((
538 538  (((
539 539  DI2&
540 -DI2 leve
541 541  )))
542 -)))|(% style="width:91px" %)(((
543 -DI2TODO2
544 -)))|(% style="width:91px" %)(((
545 -DI2TORO2
546 -)))
547 547  
548 548  (((
549 -(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
392 +DI2 level
550 550  )))
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 -DOI1&
627 -DOI2 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" %)(((
394 +)))|(% style="width:105px" %)(((
639 639  DI2TODO2
640 -)))|(% style="width:92px" %)(((
396 +)))|(% style="width:106px" %)(((
641 641  DI2TORO2
642 642  )))
643 643  
... ... @@ -655,7 +655,7 @@
655 655  
656 656  (((
657 657  (((
658 -(% style="color:#037691" %)**The fourth byte**(%%)**:**  the high four bits are 1 to represent DOI1, and the low four bits are the level of DOI2 when the interrupt is triggered.
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.
659 659  )))
660 660  )))
661 661  
... ... @@ -669,7 +669,7 @@
669 669  
670 670  (((
671 671  (((
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.
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.
673 673  )))
674 674  )))
675 675  

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