Last modified by Edwin Chen on 2022/11/22 09:38
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From version < 11.2 >
edited by Xiaoling
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To version < 18.1 >
edited by Edwin Chen
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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
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1 -XWiki.Xiaoling
1 +XWiki.Edwin
Content
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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
... ... @@ -38,16 +38,80 @@
38 38  |AT+DI2TODO2=2 |AT+DI2TODO2=2
39 39  |AT+DI2TORO2=2|AT+DI2TORO2=2
40 40  
41 -== **2.2  Point To Mult-Point ** ==
44 +=== **2.2.3 Serial port display** ===
42 42  
43 43  
47 +(% class="wikigeneratedid" %)
44 44  [[image:image-20220602111219-2.png]]
45 45  
46 46  
51 +(% class="wikigeneratedid" %)
47 47  [[image:image-20220602111219-3.png]]
48 48  
49 -(((
54 +(% class="wikigeneratedid" %)
50 50  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.
51 51  )))
52 52  
53 53  
... ... @@ -54,162 +54,372 @@
54 54  == **2.3 AT command** ==
55 55  
56 56  
124 +(((
57 57  (% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
126 +)))
58 58  
128 +(((
59 59  (% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
130 +)))
60 60  
132 +(((
61 61  (% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Counter Uplink
134 +)))
62 62  
136 +(((
63 63  (% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
138 +)))
64 64  
140 +(((
65 65  (% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
142 +)))
66 66  
144 +(((
67 67  (% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
146 +)))
68 68  
148 +(((
69 69  (% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
150 +)))
70 70  
152 +(((
71 71  (% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
154 +)))
72 72  
156 +(((
73 73  (% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
158 +)))
74 74  
160 +(((
75 75  (% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
162 +)))
76 76  
164 +(((
77 77  (% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
166 +)))
78 78  
168 +(((
79 79  (% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
170 +)))
80 80  
172 +(((
81 81  (% 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 +)))
82 82  
176 +(((
83 83  (% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
178 +)))
84 84  
180 +(((
85 85  (% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
182 +)))
86 86  
184 +(((
87 87  (% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
186 +)))
88 88  
188 +(((
89 89  (% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0)
190 +)))
90 90  
91 91  (((
193 +(((
92 92  (% 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)
93 93  )))
196 +)))
94 94  
198 +(((
95 95  (% style="color:#037691" %)**AT+TRIG1 **(%%)**:**  Set or Get the DI1 pin interrupt trigger mode (default 0,0)
200 +)))
96 96  
202 +(((
97 97  (% style="color:#037691" %)**AT+TRIG2 **(%%)**:            **Set or Get the DI2 pin interrupt trigger mode (default 0,0)
204 +)))
98 98  
206 +(((
99 99  (% style="color:#037691" %)**AT+DI1TODO1 **(%%)**:    **Set or get the mode in which DI1 maps to DO1 (default 0)
208 +)))
100 100  
210 +(((
101 101  (% style="color:#037691" %)**AT+DI1TORO1 **(%%)**:    **Set or get the mode in which DI1 maps to RO1(default 0)
212 +)))
102 102  
214 +(((
103 103  (% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:**  Set or get the mode in which DI2 maps to DO2(default 0)
216 +)))
104 104  
218 +(((
105 105  (% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
220 +)))
106 106  
222 +(((
223 +
224 +)))
107 107  
226 +(((
227 +
228 +)))
108 108  
230 +(((
109 109  (% style="color:#4f81bd" %)**Example 1:**
232 +)))
110 110  
234 +(((
111 111  **AT+SEND=01020304 **will send a payload of 01020304
236 +)))
112 112  
238 +(((
239 +
240 +)))
113 113  
242 +(((
114 114  (% style="color:#4f81bd" %)**Example 2: **
244 +)))
115 115  
246 +(((
116 116  **AT+TRIGx=a    **Trigger directly without triggering time
248 +)))
117 117  
250 +(((
118 118  **AT+TRIGx=a,b**
252 +)))
119 119  
254 +(((
120 120  a=0: falling edge;
256 +)))
121 121  
258 +(((
122 122  a=1: rising edge;
260 +)))
123 123  
262 +(((
124 124  a=2: falling edge or rising edge;
264 +)))
125 125  
266 +(((
126 126  b:  triggering time in milliseconds.
268 +)))
127 127  
270 +(((
128 128  AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
272 +)))
129 129  
274 +(((
275 +
276 +)))
130 130  
278 +(((
131 131  (% style="color:#4f81bd" %)**Example 3: **
280 +)))
132 132  
282 +(((
133 133  **AT+DI1TODO1= maps value**
284 +)))
134 134  
286 +(((
135 135  **AT+DI1TORO1= maps value**
288 +)))
136 136  
290 +(((
137 137  **AT+DI2TODO2= maps value**
292 +)))
138 138  
294 +(((
139 139  **AT+DI2TORO2= maps value**
296 +)))
140 140  
298 +(((
299 +
300 +)))
141 141  
142 142  (% border="1" style="background-color:#f7faff; color:black; width:706px" %)
143 -|=(% style="width: 102px;" %)Maps value|=(% style="width: 331px;" %)DIx to DOx|=(% style="width: 268px;" %)DIx to ROx
144 -|(% style="width:102px" %)0|(% style="width:331px" %)No Action|(% style="width:268px" %)No Action
145 -|(% 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 +(((
146 146  If DIx is high, control ROx to close,
324 +)))
147 147  
326 +(((
148 148  if DIx is low, control ROx to open
149 149  )))
150 -|(% 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 +(((
151 151  If DIx is high, control ROx to open,
337 +)))
152 152  
339 +(((
153 153  if DIx is low, control ROx to close
154 154  )))
155 -|(% 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 +)))
156 156  
351 +(((
157 157  (% style="color:#4f81bd" %)**Example 4: **
353 +)))
158 158  
355 +(((
159 159  **AT+GROUPMOD=0**  Set to point to point mode
357 +)))
160 160  
359 +(((
161 161  **AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
361 +)))
162 162  
163 163  (((
364 +(((
164 164  **AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
165 165  )))
367 +)))
166 166  
369 +(((
167 167  **AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
371 +)))
168 168  
373 +(((
169 169  **AT+GROUPMOD=1,1**  Set the RX group numbered 1
375 +)))
170 170  
377 +(((
171 171  **AT+GROUPMOD=1,2**  Set the RX group numbered 2
379 +)))
172 172  
173 173  
174 174  == **2.4 Data Format** ==
175 175  
384 +(((
176 176  8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
386 +)))
177 177  
388 +(((
389 +
390 +)))
178 178  
392 +(((
179 179  (% style="color:#4f81bd" %)**Payload:**
394 +)))
180 180  
181 181  (% border="1" style="background-color:#f7faff; color:black; width:938px" %)
182 -|=(% 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
183 -|(% style="width:123px" %)**Value**|(% style="width:38px" %)address|(% style="width:70px" %)request|(% style="width:52px" %)ACK|(% style="width:127px" %)(((
397 +|=(% style="width: 123px;" %)(((
398 +**Size (bytes)**
399 +)))|=(% style="width: 107px;" %)(((
400 +1
401 +)))|=(% style="width: 107px;" %)(((
402 +1
403 +)))|=(% style="width: 107px;" %)(((
404 +1
405 +)))|=(% style="width: 107px;" %)(((
406 +1
407 +)))|=(% style="width: 107px;" %)(((
408 +1
409 +)))|=(% style="width: 107px;" %)(((
410 +1
411 +)))|=(% style="width: 107px;" %)(((
412 +1
413 +)))|=(% style="width: 107px;" %)(((
414 +1
415 +)))|=(% style="width: 107px;" %)(((
416 +1
417 +)))
418 +|(% style="width:123px" %)(((
419 +**Value**
420 +)))|(% style="width:38px" %)(((
421 +address
422 +)))|(% style="width:70px" %)(((
423 +request
424 +)))|(% style="width:52px" %)(((
425 +ACK
426 +)))|(% style="width:127px" %)(((
427 +(((
184 184  DI1&
429 +)))
185 185  
431 +(((
186 186  DI1 level
187 -)))|(% style="width:101px" %)DI1TODO1|(% style="width:91px" %)DI1TORO1|(% style="width:111px" %)(((
433 +)))
434 +)))|(% style="width:101px" %)(((
435 +DI1TODO1
436 +)))|(% style="width:91px" %)(((
437 +DI1TORO1
438 +)))|(% style="width:111px" %)(((
439 +(((
188 188  DI2&
441 +)))
189 189  
443 +(((
190 190  DI2 level
191 -)))|(% style="width:105px" %)DI2TODO2|(% style="width:106px" %)DI2TORO2
445 +)))
446 +)))|(% style="width:105px" %)(((
447 +DI2TODO2
448 +)))|(% style="width:106px" %)(((
449 +DI2TORO2
450 +)))
192 192  
452 +(((
193 193  (% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
454 +)))
194 194  
456 +(((
195 195  (% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
458 +)))
196 196  
460 +(((
197 197  (% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
462 +)))
198 198  
199 199  (((
465 +(((
200 200  (% 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.
201 201  )))
468 +)))
202 202  
470 +(((
203 203  (% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
472 +)))
204 204  
474 +(((
205 205  (% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
476 +)))
206 206  
207 207  (((
479 +(((
208 208  (% 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.
209 209  )))
482 +)))
210 210  
484 +(((
211 211  (% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
486 +)))
212 212  
488 +(((
213 213  (% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
490 +)))
214 214  
215 215  
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