Last modified by Edwin Chen on 2022/11/22 09:38
<
From version < 14.1 >
edited by Xiaoling
on 2022/06/02 14:47
To version < 3.1 >
edited by Xiaoling
on 2022/06/02 11:12
>
Change comment: Uploaded new attachment "image-20220602111219-2.png", version {1}

Summary

Details

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Content
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2 2  {{toc/}}
3 3  {{/box}}
4 4  
5 -= **1. Overview** =
5 += Overview =
6 6  
7 -(((
8 8  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:
9 -)))
10 10  
11 -(((
12 12  [[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
13 -)))
14 14  
15 15  == ==
16 16  
17 -= **2. Features for this firmware** =
13 += Features for this firmware: =
18 18  
19 -
20 -== **2.1  Point To Point** ==
21 -
22 -=== **2.1.1 Overview** ===
23 -
24 -[[image:image-20220602111219-1.png||height="472" width="972"]]
25 -
26 -
27 -=== **2.2.2 Configure** ===
28 -
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
40 -
41 -
42 -(% class="wikigeneratedid" %)
43 -2.2.3 Serial port display
44 -
45 -
46 -(% class="wikigeneratedid" %)
47 -[[image:image-20220602111219-2.png]]
48 -
49 -
50 -(% class="wikigeneratedid" %)
51 -[[image:image-20220602111219-3.png]]
52 -
53 -(% class="wikigeneratedid" %)
54 -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.
55 -
56 -
57 -
58 -== **2.2  Point To Mult-Point ** ==
59 -
60 -
61 -
62 -
63 -
64 -(((
65 65  
66 -)))
67 -
68 -
69 -== **2.3 AT command** ==
70 -
71 -
72 -(((
73 -(% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU
74 -)))
75 -
76 -(((
77 -(% style="color:#037691" %)**AT+FDR** (%%)**:**  Reset Parameters to Factory Default, Keys Reserve
78 -)))
79 -
80 -(((
81 -(% style="color:#037691" %)**AT+FCU** (%%)**:**  Get or Set the Frame Counter Uplink
82 -)))
83 -
84 -(((
85 -(% style="color:#037691" %)**AT+FCD** (%%)**:**  Get or Set the Frame Counter Downlink
86 -)))
87 -
88 -(((
89 -(% style="color:#037691" %)**AT+TXP** (%%)**:**  Get or Set the transmit power, the maximum is 20dBm (default is 14dBm)
90 -)))
91 -
92 -(((
93 -(% style="color:#037691" %)**AT+SYNC** (%%)**:**  Get or Set the Sync word [1:0x34,0:0x12] (default is 1)
94 -)))
95 -
96 -(((
97 -(% style="color:#037691" %)**AT+PMB** (%%)**:    **Get or Set the preamble (default:8)
98 -)))
99 -
100 -(((
101 -(% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000)
102 -)))
103 -
104 -(((
105 -(% style="color:#037691" %)**AT+TXSF **(%%)**:**  Get or Set the spreading factor of TX (7 to 12) (default:12)
106 -)))
107 -
108 -(((
109 -(% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000)
110 -)))
111 -
112 -(((
113 -(% style="color:#037691" %)**AT+RXSF **(%%)**:**  Get or Set the spreading factor of RX (7 to 12) (default:12)
114 -)))
115 -
116 -(((
117 -(% style="color:#037691" %)**AT+BW **(%%)**:       **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0)
118 -)))
119 -
120 -(((
121 -(% 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)
122 -)))
123 -
124 -(((
125 -(% style="color:#037691" %)**AT+TDC **(%%)**:**  Get or set the application data transmission interval in ms(default 10 minutes)
126 -)))
127 -
128 -(((
129 -(% style="color:#037691" %)**AT+VER **(%%)**:**  Get firmware version number
130 -)))
131 -
132 -(((
133 -(% style="color:#037691" %)**AT+SEND **(%%)**:   **Set Custom sent hex data
134 -)))
135 -
136 -(((
137 -(% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0)
138 -)))
139 -
140 -(((
141 -(((
142 -(% 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)
143 -)))
144 -)))
145 -
146 -(((
147 -(% style="color:#037691" %)**AT+TRIG1 **(%%)**:**  Set or Get the DI1 pin interrupt trigger mode (default 0,0)
148 -)))
149 -
150 -(((
151 -(% style="color:#037691" %)**AT+TRIG2 **(%%)**:            **Set or Get the DI2 pin interrupt trigger mode (default 0,0)
152 -)))
153 -
154 -(((
155 -(% style="color:#037691" %)**AT+DI1TODO1 **(%%)**:    **Set or get the mode in which DI1 maps to DO1 (default 0)
156 -)))
157 -
158 -(((
159 -(% style="color:#037691" %)**AT+DI1TORO1 **(%%)**:    **Set or get the mode in which DI1 maps to RO1(default 0)
160 -)))
161 -
162 -(((
163 -(% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:**  Set or get the mode in which DI2 maps to DO2(default 0)
164 -)))
165 -
166 -(((
167 -(% style="color:#037691" %)**AT+DI2TORO2 **(%%)**:    **Set or get the mode in which DI2 maps to RO2(default 0)
168 -)))
169 -
170 -(((
171 -
172 -)))
173 -
174 -(((
175 -
176 -)))
177 -
178 -(((
179 -(% style="color:#4f81bd" %)**Example 1:**
180 -)))
181 -
182 -(((
183 -**AT+SEND=01020304 **will send a payload of 01020304
184 -)))
185 -
186 -(((
187 -
188 -)))
189 -
190 -(((
191 -(% style="color:#4f81bd" %)**Example 2: **
192 -)))
193 -
194 -(((
195 -**AT+TRIGx=a    **Trigger directly without triggering time
196 -)))
197 -
198 -(((
199 -**AT+TRIGx=a,b**
200 -)))
201 -
202 -(((
203 -a=0: falling edge;
204 -)))
205 -
206 -(((
207 -a=1: rising edge;
208 -)))
209 -
210 -(((
211 -a=2: falling edge or rising edge;
212 -)))
213 -
214 -(((
215 -b:  triggering time in milliseconds.
216 -)))
217 -
218 -(((
219 -AT+TRIGx=2,50  Falling edge or rising edge trigger, and the trigger time exceeds 50ms.
220 -)))
221 -
222 -(((
223 -
224 -)))
225 -
226 -(((
227 -(% style="color:#4f81bd" %)**Example 3: **
228 -)))
229 -
230 -(((
231 -**AT+DI1TODO1= maps value**
232 -)))
233 -
234 -(((
235 -**AT+DI1TORO1= maps value**
236 -)))
237 -
238 -(((
239 -**AT+DI2TODO2= maps value**
240 -)))
241 -
242 -(((
243 -**AT+DI2TORO2= maps value**
244 -)))
245 -
246 -(((
247 -
248 -)))
249 -
250 -(% border="1" style="background-color:#f7faff; color:black; width:706px" %)
251 -|=(% style="width: 102px;" %)(((
252 -Maps value
253 -)))|=(% style="width: 331px;" %)(((
254 -DIx to DOx
255 -)))|=(% style="width: 268px;" %)(((
256 -DIx to ROx
257 -)))
258 -|(% style="width:102px" %)(((
259 -0
260 -)))|(% style="width:331px" %)(((
261 -No Action
262 -)))|(% style="width:268px" %)(((
263 -No Action
264 -)))
265 -|(% style="width:102px" %)(((
266 -1
267 -)))|(% style="width:331px" %)(((
268 -If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level
269 -)))|(% style="width:268px" %)(((
270 -(((
271 -If DIx is high, control ROx to close,
272 -)))
273 -
274 -(((
275 -if DIx is low, control ROx to open
276 -)))
277 -)))
278 -|(% style="width:102px" %)(((
279 -2
280 -)))|(% style="width:331px" %)(((
281 -If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level
282 -)))|(% style="width:268px" %)(((
283 -(((
284 -If DIx is high, control ROx to open,
285 -)))
286 -
287 -(((
288 -if DIx is low, control ROx to close
289 -)))
290 -)))
291 -|(% style="width:102px" %)(((
292 -3
293 -)))|(% style="width:331px" %)(((
294 -DOx state flip
295 -)))|(% style="width:268px" %)(((
296 -ROx state flip
297 -)))
298 -
299 -(((
300 -(% style="color:#4f81bd" %)**Example 4: **
301 -)))
302 -
303 -(((
304 -**AT+GROUPMOD=0**  Set to point to point mode
305 -)))
306 -
307 -(((
308 -**AT+GROUPMOD=0,aa**  Set the TX group that controls the number of aa (The maximum value of aa is 8)
309 -)))
310 -
311 -(((
312 -(((
313 -**AT+GROUPMOD=1,bb**  Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8)
314 -)))
315 -)))
316 -
317 -(((
318 -**AT+GROUPMOD=0,2**  Set to control the TX group of the two RX groups
319 -)))
320 -
321 -(((
322 -**AT+GROUPMOD=1,1**  Set the RX group numbered 1
323 -)))
324 -
325 -(((
326 -**AT+GROUPMOD=1,2**  Set the RX group numbered 2
327 -)))
328 -
329 -
330 -== **2.4 Data Format** ==
331 -
332 -(((
333 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum
334 -)))
335 -
336 -(((
337 -
338 -)))
339 -
340 -(((
341 -(% style="color:#4f81bd" %)**Payload:**
342 -)))
343 -
344 -(% border="1" style="background-color:#f7faff; color:black; width:938px" %)
345 -|=(% style="width: 123px;" %)(((
346 -**Size (bytes)**
347 -)))|=(% style="width: 107px;" %)(((
348 -1
349 -)))|=(% style="width: 107px;" %)(((
350 -1
351 -)))|=(% style="width: 107px;" %)(((
352 -1
353 -)))|=(% style="width: 107px;" %)(((
354 -1
355 -)))|=(% style="width: 107px;" %)(((
356 -1
357 -)))|=(% style="width: 107px;" %)(((
358 -1
359 -)))|=(% style="width: 107px;" %)(((
360 -1
361 -)))|=(% style="width: 107px;" %)(((
362 -1
363 -)))|=(% style="width: 107px;" %)(((
364 -1
365 -)))
366 -|(% style="width:123px" %)(((
367 -**Value**
368 -)))|(% style="width:38px" %)(((
369 -address
370 -)))|(% style="width:70px" %)(((
371 -request
372 -)))|(% style="width:52px" %)(((
373 -ACK
374 -)))|(% style="width:127px" %)(((
375 -(((
376 -DI1&
377 -)))
378 -
379 -(((
380 -DI1 level
381 -)))
382 -)))|(% style="width:101px" %)(((
383 -DI1TODO1
384 -)))|(% style="width:91px" %)(((
385 -DI1TORO1
386 -)))|(% style="width:111px" %)(((
387 -(((
388 -DI2&
389 -)))
390 -
391 -(((
392 -DI2 level
393 -)))
394 -)))|(% style="width:105px" %)(((
395 -DI2TODO2
396 -)))|(% style="width:106px" %)(((
397 -DI2TORO2
398 -)))
399 -
400 -(((
401 -(% style="color:#037691" %)**The first byte**(%%)**:**  00 is the broadcast address, 01-08 is the RX group number.
402 -)))
403 -
404 -(((
405 -(% style="color:#037691" %)**The second byte**(%%)**:**  send mapping request when not 0, not request when it is 0.
406 -)))
407 -
408 -(((
409 -(% style="color:#037691" %)**The third byte**(%%)**:**  ACK returned to the sender after the mapping is completed.
410 -)))
411 -
412 -(((
413 -(((
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.
415 -)))
416 -)))
417 -
418 -(((
419 -(% style="color:#037691" %)**The Fifth byte**(%%)**:       **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered.
420 -)))
421 -
422 -(((
423 -(% style="color:#037691" %)**The Sixth byte**(%%)**:**  0 does not trigger interrupt when DI1TORO1 interrupt is triggered.
424 -)))
425 -
426 -(((
427 -(((
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.
429 -)))
430 -)))
431 -
432 -(((
433 -(% style="color:#037691" %)**The 8th byte**(%%)**:          **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered.
434 -)))
435 -
436 -(((
437 -(% style="color:#037691" %)**The 9th byte**(%%)**:**  DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered.
438 -)))
439 -
440 -
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