Last modified by Edwin Chen on 2022/11/22 09:38
<
From version < 11.1 >
edited by Xiaoling
on 2022/06/02 14:28
To version < 19.1 >
edited by Bei Jinggeng
on 2022/11/14 14:01
>
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
... ... @@ -1,7 +1,10 @@
1 -{{box cssClass="floatinginfobox" title="**Contents**"}}
1 +**Contents： **
2 +
2 2  {{toc/}}
3 -{{/box}}
4 4  
5 +
6 +
7 +
5 5  = **1. Overview** =
6 6  
7 7  (((
... ... @@ -12,20 +12,20 @@
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 17  = **2. Features for this firmware** =
18 18  
19 -
20 20  == **2.1  Point To Point** ==
21 21  
23 +=== **2.1.1 Overview** ===
22 22  
25 +
23 23  [[image:image-20220602111219-1.png||height="472" width="972"]]
24 24  
25 25  
26 -(% class="wikigeneratedid" id="H2.2.Configure" %)
27 -(% style="color:blue" %)**Configure:**
29 +=== **2.2.2 Configure** ===
28 28  
31 +
29 29  (% border="1" style="background-color:#f7faff; color:black; width:500px" %)
30 30  |=**A's configuration**|=**B's configuration**
31 31  |AT+GROUPMOD=0|AT+GROUPMOD=0
... ... @@ -38,17 +38,80 @@
38 38  |AT+DI2TODO2=2 |AT+DI2TODO2=2
39 39  |AT+DI2TORO2=2|AT+DI2TORO2=2
40 40  
44 +=== **2.2.3 Serial port display** ===
41 41  
42 -== **2.2  Point To Mult-Point ** ==
43 43  
44 -
47 +(% class="wikigeneratedid" %)
45 45  [[image:image-20220602111219-2.png]]
46 46  
47 47  
51 +(% class="wikigeneratedid" %)
48 48  [[image:image-20220602111219-3.png]]
49 49  
50 -(((
54 +(% class="wikigeneratedid" %)
51 51  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.
52 52  )))
53 53  
54 54  
... ... @@ -55,162 +55,581 @@
55 55  == **2.3 AT command** ==
56 56  
57 57  
124 +(((
58 58  (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
126 +)))
59 59  
128 +(((
60 60  (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
130 +)))
61 61  
132 +(((
62 62  (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Counter Uplink
134 +)))
63 63  
136 +(((
64 64  (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
138 +)))
65 65  
140 +(((
66 66  (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
142 +)))
67 67  
144 +(((
68 68  (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
146 +)))
69 69  
148 +(((
70 70  (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
150 +)))
71 71  
152 +(((
72 72  (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
154 +)))
73 73  
156 +(((
74 74  (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
158 +)))
75 75  
160 +(((
76 76  (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
162 +)))
77 77  
164 +(((
78 78  (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
166 +)))
79 79  
168 +(((
80 80  (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
170 +)))
81 81  
172 +(((
82 82  (% 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)
174 +)))
83 83  
176 +(((
84 84  (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
178 +)))
85 85  
180 +(((
86 86  (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
182 +)))
87 87  
184 +(((
88 88  (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
186 +)))
89 89  
188 +(((
90 90  (% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0)
190 +)))
91 91  
92 92  (((
193 +(((
93 93  (% 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)
94 94  )))
196 +)))
95 95  
198 +(((
96 96  (% style="color:#037691" %)**AT+TRIG1 **(%%)**:**  Set or Get the DI1 pin interrupt trigger mode (default 0,0)
200 +)))
97 97  
202 +(((
98 98  (% style="color:#037691" %)**AT+TRIG2 **(%%)**:            **Set or Get the DI2 pin interrupt trigger mode (default 0,0)
204 +)))
99 99  
206 +(((
100 100  (% style="color:#037691" %)**AT+DI1TODO1 **(%%)**:    **Set or get the mode in which DI1 maps to DO1 (default 0)
208 +)))
101 101  
210 +(((
102 102  (% style="color:#037691" %)**AT+DI1TORO1 **(%%)**:    **Set or get the mode in which DI1 maps to RO1(default 0)
212 +)))
103 103  
214 +(((
104 104  (% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:**  Set or get the mode in which DI2 maps to DO2(default 0)
216 +)))
105 105  
218 +(((
106 106  (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
220 +)))
107 107  
222 +(((
223 +
224 +)))
108 108  
226 +(((
227 +
228 +)))
109 109  
230 +(((
110 110  (% style="color:#4f81bd" %)**Example 1:**
232 +)))
111 111  
234 +(((
112 112  **AT+SEND=01020304 **will send a payload of 01020304
236 +)))
113 113  
238 +(((
239 +
240 +)))
114 114  
242 +(((
115 115  (% style="color:#4f81bd" %)**Example 2: **
244 +)))
116 116  
246 +(((
117 117  **AT+TRIGx=a    **Trigger directly without triggering time
248 +)))
118 118  
250 +(((
119 119  **AT+TRIGx=a,b**
252 +)))
120 120  
254 +(((
121 121  a=0: falling edge;
256 +)))
122 122  
258 +(((
123 123  a=1: rising edge;
260 +)))
124 124  
262 +(((
125 125  a=2: falling edge or rising edge;
264 +)))
126 126  
266 +(((
127 127  b:  triggering time in milliseconds.
268 +)))
128 128  
270 +(((
129 129  AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
272 +)))
130 130  
274 +(((
275 +
276 +)))
131 131  
278 +(((
132 132  (% style="color:#4f81bd" %)**Example 3: **
280 +)))
133 133  
282 +(((
134 134  **AT+DI1TODO1= maps value**
284 +)))
135 135  
286 +(((
136 136  **AT+DI1TORO1= maps value**
288 +)))
137 137  
290 +(((
138 138  **AT+DI2TODO2= maps value**
292 +)))
139 139  
294 +(((
140 140  **AT+DI2TORO2= maps value**
296 +)))
141 141  
298 +(((
299 +
300 +)))
142 142  
143 143  (% border="1" style="background-color:#f7faff; color:black; width:706px" %)
144 -|=(% style="width: 102px;" %)Maps value|=(% style="width: 331px;" %)DIx to DOx|=(% style="width: 268px;" %)DIx to ROx
145 -|(% style="width:102px" %)0|(% style="width:331px" %)No Action|(% style="width:268px" %)No Action
146 -|(% style="width:102px" %)1|(% style="width:331px" %)If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level|(% style="width:268px" %)(((
303 +|=(% style="width: 102px;" %)(((
304 +Maps value
305 +)))|=(% style="width: 331px;" %)(((
306 +DIx to DOx
307 +)))|=(% style="width: 268px;" %)(((
308 +DIx to ROx
309 +)))
310 +|(% style="width:102px" %)(((
311 +0
312 +)))|(% style="width:331px" %)(((
313 +No Action
314 +)))|(% style="width:268px" %)(((
315 +No Action
316 +)))
317 +|(% style="width:102px" %)(((
318 +1
319 +)))|(% style="width:331px" %)(((
320 +If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
321 +)))|(% style="width:268px" %)(((
322 +(((
147 147  If DIx is high, control ROx to close,
324 +)))
148 148  
326 +(((
149 149  if DIx is low, control ROx to open
150 150  )))
151 -|(% style="width:102px" %)2|(% style="width:331px" %)If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level|(% style="width:268px" %)(((
329 +)))
330 +|(% style="width:102px" %)(((
331 +2
332 +)))|(% style="width:331px" %)(((
333 +If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
334 +)))|(% style="width:268px" %)(((
335 +(((
152 152  If DIx is high, control ROx to open,
337 +)))
153 153  
339 +(((
154 154  if DIx is low, control ROx to close
155 155  )))
156 -|(% style="width:102px" %)3|(% style="width:331px" %)DOx state flip|(% style="width:268px" %)ROx state flip
342 +)))
343 +|(% style="width:102px" %)(((
344 +3
345 +)))|(% style="width:331px" %)(((
346 +DOx state flip
347 +)))|(% style="width:268px" %)(((
348 +ROx state flip
349 +)))
157 157  
351 +(((
158 158  (% style="color:#4f81bd" %)**Example 4: **
353 +)))
159 159  
355 +(((
160 160  **AT+GROUPMOD=0**  Set to point to point mode
357 +)))
161 161  
359 +(((
162 162  **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
361 +)))
163 163  
164 164  (((
364 +(((
165 165  **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
166 166  )))
367 +)))
167 167  
369 +(((
168 168  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
371 +)))
169 169  
373 +(((
170 170  **AT+GROUPMOD=1,1**  Set the RX group numbered 1
375 +)))
171 171  
377 +(((
172 172  **AT+GROUPMOD=1,2**  Set the RX group numbered 2
173 173  
174 174  
381 +=== 2.3.1 TRIG command is configured in the transmit LT. (LT1)(Since firmware 1.3) ===
382 +)))
383 +
384 +**AT+TRIGx=a     **Trigger transmit directly without triggering time
385 +
386 +**AT+TRIGx=a,b**  Trigger transmit with triggering time threshold
387 +
388 +**AT+TRIGx=a,b,c **Trigger transmit with triggering time threshold, and continue to transmit every xx seconds if DI status no change.
389 +
390 +
391 +a=0: falling edge;
392 +
393 +a=1: rising edge;
394 +
395 +a=2: falling edge or rising edge;
396 +
397 +b:  triggering time in milliseconds.
398 +
399 +c: transmit interval
400 +
401 +
402 +**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)
403 +
404 +Command:
405 +
406 +AT+TRIG1=2,50  Falling edge or rising edge trigger, and the trigger time should exceed 50ms.
407 +
408 +
409 +**Use Case 2: **Sync LT2 RO / DO status with LT1 every minute.
410 +
411 +Command:
412 +
413 +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.
414 +
415 +
416 +=== 2.3.2 RO/DO is configured in the receiver LT (LT2)(Since firmware 1.3) ===
417 +
418 +AT+DI1TODO1= maps value[,latch time]
419 +
420 +AT+DI1TORO1= maps value[,latch time]
421 +
422 +AT+DI2TODO2= maps value[,latch time]
423 +
424 +AT+DI2TORO2= maps value[,latch time]
425 +
426 +
427 +(% border="1" style="background-color:#f7faff; color:black; width:706px" %)
428 +| **Maps value**|DIx to DOx|DIx to ROx
429 +|0|No Action|No Action
430 +|1|If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level|(((
431 +If DIx is high, control ROx to close,
432 +
433 +if DIx is low, control ROx to open
434 +)))
435 +|2|If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level|(((
436 +If DIx is high, control ROx to open,
437 +
438 +if DIx is low, control ROx to close
439 +)))
440 +|3|DOx state flip|ROx state flip
441 +
442 +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.
443 +
444 +
445 +**Case1**:
446 +
447 +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.
448 +
449 +
450 +**Case2**:
451 +
452 +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.
453 +
454 +
455 +=== 2.3.3 Save the RO/DO status during power off(Since firmware 1.3) ===
456 +
457 +Enable/Disbale retain Digital Output/Relay Output after power off / Power On
458 +
459 +AT+DOROSAVE=0 ~/~/ Disable Retain after power off/on
460 +
461 +AT+DOROSAVE=1 ~/~/ Enable Retain after power off/on
462 +
463 +AT+DOROSAVE=2,a,b,c,d ~/~/ set DO/RO port to default state after power on.
464 +
465 +a: for DO1
466 +
467 +b: for DO2
468 +
469 +c: for RO1
470 +
471 +d: for RO2.
472 +
473 +Example:
474 +
475 +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.
476 +
477 +
478 +=== 2.3.4 Control Sleep status.(Since firmware 1.3) ===
479 +
480 +DI2 can be used to set LT into sleep mode.
481 +
482 +AT+DI2SLEEP=1 ~/~/Enable DI2 as Sleep pin
483 +
484 +AT+DI2SLEEP=0 ~/~/Disable DI2 as Sleep pin
485 +
486 +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.
487 +
488 +
175 175  == **2.4 Data Format** ==
176 176  
491 +(((
177 177  8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
493 +)))
178 178  
495 +(((
496 +
497 +)))
179 179  
499 +(((
180 180  (% style="color:#4f81bd" %)**Payload:**
501 +)))
181 181  
182 182  (% border="1" style="background-color:#f7faff; color:black; width:938px" %)
183 -|=(% style="width: 123px;" %)**Size (bytes)**|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1
184 -|(% style="width:123px" %)**Value**|(% style="width:38px" %)address|(% style="width:70px" %)request|(% style="width:52px" %)ACK|(% style="width:127px" %)(((
504 +|=(% style="width: 123px;" %)(((
505 +**Size (bytes)**
506 +)))|=(% style="width: 107px;" %)(((
507 +1
508 +)))|=(% style="width: 107px;" %)(((
509 +1
510 +)))|=(% style="width: 107px;" %)(((
511 +1
512 +)))|=(% style="width: 107px;" %)(((
513 +1
514 +)))|=(% style="width: 107px;" %)(((
515 +1
516 +)))|=(% style="width: 107px;" %)(((
517 +1
518 +)))|=(% style="width: 107px;" %)(((
519 +1
520 +)))|=(% style="width: 107px;" %)(((
521 +1
522 +)))|=(% style="width: 107px;" %)(((
523 +1
524 +)))
525 +|(% style="width:123px" %)(((
526 +**Value**
527 +)))|(% style="width:38px" %)(((
528 +address
529 +)))|(% style="width:70px" %)(((
530 +request
531 +)))|(% style="width:52px" %)(((
532 +ACK
533 +)))|(% style="width:127px" %)(((
534 +(((
185 185  DI1&
536 +)))
186 186  
538 +(((
187 187  DI1 level
188 -)))|(% style="width:101px" %)DI1TODO1|(% style="width:91px" %)DI1TORO1|(% style="width:111px" %)(((
540 +)))
541 +)))|(% style="width:101px" %)(((
542 +DI1TODO1
543 +)))|(% style="width:91px" %)(((
544 +DI1TORO1
545 +)))|(% style="width:111px" %)(((
546 +(((
189 189  DI2&
548 +)))
190 190  
550 +(((
191 191  DI2 level
192 -)))|(% style="width:105px" %)DI2TODO2|(% style="width:106px" %)DI2TORO2
552 +)))
553 +)))|(% style="width:105px" %)(((
554 +DI2TODO2
555 +)))|(% style="width:106px" %)(((
556 +DI2TORO2
557 +)))
193 193  
559 +(((
194 194  (% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
561 +)))
195 195  
563 +(((
196 196  (% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
565 +)))
197 197  
567 +(((
198 198  (% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
569 +)))
199 199  
200 200  (((
572 +(((
201 201  (% 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.
202 202  )))
575 +)))
203 203  
577 +(((
204 204  (% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
579 +)))
205 205  
581 +(((
206 206  (% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
583 +)))
207 207  
208 208  (((
586 +(((
209 209  (% 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.
210 210  )))
589 +)))
211 211  
591 +(((
212 212  (% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
593 +)))
213 213  
595 +(((
214 214  (% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
597 +)))
215 215  
599 +(((
216 216  
601 +
602 +(% style="color:#4f81bd" %)**Payload:（Since firmware 1.3）The receiver replies to the sent packet**
603 +)))
604 +
605 +(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
606 +|=(% style="width: 123px;" %)(((
607 +**Size (bytes)**
608 +)))|=(% style="width: 107px;" %)(((
609 +1
610 +)))|=(% style="width: 107px;" %)(((
611 +1
612 +)))|=(% style="width: 107px;" %)(((
613 +1
614 +)))|=(% style="width: 107px;" %)(((
615 +1
616 +)))|=(% style="width: 107px;" %)(((
617 +1
618 +)))|=(% style="width: 107px;" %)(((
619 +1
620 +)))|=(% style="width: 107px;" %)(((
621 +1
622 +)))|=(% style="width: 107px;" %)(((
623 +1
624 +)))|=(% style="width: 107px;" %)(((
625 +1
626 +)))
627 +|(% style="width:123px" %)(((
628 +**Value**
629 +)))|(% style="width:38px" %)(((
630 +address
631 +)))|(% style="width:70px" %)(((
632 +request
633 +)))|(% style="width:52px" %)(((
634 +ACK
635 +)))|(% style="width:127px" %)(((
636 +(((
637 +DO1&
638 +)))
639 +
640 +(((
641 +DO1 level
642 +)))
643 +)))|(% style="width:101px" %)(((
644 +DI1TODO1
645 +)))|(% style="width:91px" %)(((
646 +DI1TORO1
647 +)))|(% style="width:111px" %)(((
648 +(((
649 +RO2&
650 +)))
651 +
652 +(((
653 +RO2 level
654 +)))
655 +)))|(% style="width:105px" %)(((
656 +DI2TODO2
657 +)))|(% style="width:106px" %)(((
658 +DI2TORO2
659 +)))
660 +
661 +(((
662 +(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
663 +)))
664 +
665 +(((
666 +(% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
667 +)))
668 +
669 +(((
670 +(% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
671 +)))
672 +
673 +(((
674 +(((
675 +(% 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.
676 +)))
677 +)))
678 +
679 +(((
680 +(% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
681 +)))
682 +
683 +(((
684 +(% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
685 +)))
686 +
687 +(((
688 +(((
689 +(% 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.
690 +)))
691 +)))
692 +
693 +(((
694 +(% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
695 +)))
696 +
697 +(((
698 +(% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
699 +)))
700 +
701 +
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