Changes for page Point to Point Communication of LT-22222-L
Last modified by Edwin Chen on 2022/11/22 09:38
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... ... @@ -4,13 +4,9 @@ 4 4 5 5 = **1. 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 ... ... @@ -17,15 +17,13 @@ 17 17 = **2. Features for this firmware** = 18 18 19 19 20 -== **2.1 Point To Point** ==16 +== **2.1 Overview** == 21 21 18 +[[image:image-20220602111219-1.png]] 22 22 23 -[[image:image-20220602111219-1.png||height="472" width="972"]] 24 24 21 +== **2.2. Configure** == 25 25 26 -(% class="wikigeneratedid" id="H2.2.Configure" %) 27 -(% style="color:blue" %)**Configure:** 28 - 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 ... ... @@ -38,388 +38,52 @@ 38 38 |AT+DI2TODO2=2 |AT+DI2TODO2=2 39 39 |AT+DI2TORO2=2|AT+DI2TORO2=2 40 40 41 -= =**2.2PointToMult-Point**==35 +(% style="color:#037691" %)**A's configuration: ** **B's configuration:** 42 42 43 - 44 -[[image:image-20220602111219-2.png]] 45 - 46 - 47 -[[image:image-20220602111219-3.png]] 48 - 49 49 ((( 50 - IfthesenderdoesnotgettheACKreplyfromthereceiver,itwillretransmitupto4times,eachintervalis6seconds,andtheUplinkCounteroftheretransmissionwillnotincrease.38 +AT+GROUPMOD=0 AT+GROUPMOD=0 51 51 ))) 52 52 53 - 54 -== **2.3 AT command** == 55 - 56 - 57 57 ((( 58 - (% style="color:#037691"%)**ATZ**(%%)**:**TrigaresetoftheMCU42 +AT+TXCHS=868700000 AT+TXCHS=869000000 59 59 ))) 60 60 61 61 ((( 62 - (% style="color:#037691" %)**AT+FDR** (%%)**:**ResetParameterstoFactoryDefault,KeysReserve46 +AT+RXCHS=869000000 AT+RXCHS=868700000 63 63 ))) 64 64 65 65 ((( 66 - (% style="color:#037691" %)**AT+FCU** (%%)**:**GetorSettheFrameCounterUplink50 +AT+TRIG1=2,50 AT+TRIG1=2,50 67 67 ))) 68 68 69 69 ((( 70 - (% style="color:#037691" %)**AT+FCD** (%%)**:**GetorSettheFrameCounterDownlink54 +AT+TRIG2=2,50 AT+TRIG2=2,50 71 71 ))) 72 72 73 73 ((( 74 - (% style="color:#037691" %)**AT+TXP** (%%)**:**GetorSetthetransmitpower,themaximumis20dBm(defaultis14dBm)58 +AT+DI1TODO1=2 AT+DI1TODO1=2 75 75 ))) 76 76 77 77 ((( 78 - (% style="color:#037691" %)**AT+SYNC** (%%)**:**GetorSettheSyncword[1:0x34,0:0x12](defaultis1)62 +AT+DI1TORO1=2 AT+DI1TORO1=2 79 79 ))) 80 80 81 81 ((( 82 - (% style="color:#037691" %)**AT+PMB** (%%)**:**GetorSetthepreamble(default:8)66 +AT+DI2TODO2=2 AT+DI2TODO2=2 83 83 ))) 84 84 85 85 ((( 86 - (% style="color:#037691" %)**AT+TXCHS**(%%)**:**GetorSetthetransmitfrequencyofTX(default:868700000)70 +AT+DI2TORO2=2 AT+DI2TORO2=2 87 87 ))) 88 88 89 -((( 90 -(% style="color:#037691" %)**AT+TXSF **(%%)**:** Get or Set the spreading factor of TX (7 to 12) (default:12) 91 -))) 92 92 93 -((( 94 -(% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000) 95 -))) 74 +== **2.3. Serial port display** == 96 96 97 -((( 98 -(% style="color:#037691" %)**AT+RXSF **(%%)**:** Get or Set the spreading factor of RX (7 to 12) (default:12) 99 -))) 76 +[[image:image-20220602111219-2.png]] 100 100 101 -((( 102 -(% style="color:#037691" %)**AT+BW **(%%)**: **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0) 103 -))) 104 104 105 -((( 106 -(% 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) 107 -))) 79 +[[image:image-20220602111219-3.png]] 108 108 109 -((( 110 -(% style="color:#037691" %)**AT+TDC **(%%)**:** Get or set the application data transmission interval in ms(default 10 minutes) 111 -))) 81 +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. 112 112 113 -((( 114 -(% style="color:#037691" %)**AT+VER **(%%)**:** Get firmware version number 115 -))) 116 - 117 -((( 118 -(% style="color:#037691" %)**AT+SEND **(%%)**: **Set Custom sent hex data 119 -))) 120 - 121 -((( 122 -(% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0) 123 -))) 124 - 125 -((( 126 -((( 127 -(% 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) 128 -))) 129 -))) 130 - 131 -((( 132 -(% style="color:#037691" %)**AT+TRIG1 **(%%)**:** Set or Get the DI1 pin interrupt trigger mode (default 0,0) 133 -))) 134 - 135 -((( 136 -(% style="color:#037691" %)**AT+TRIG2 **(%%)**: **Set or Get the DI2 pin interrupt trigger mode (default 0,0) 137 -))) 138 - 139 -((( 140 -(% style="color:#037691" %)**AT+DI1TODO1 **(%%)**: **Set or get the mode in which DI1 maps to DO1 (default 0) 141 -))) 142 - 143 -((( 144 -(% style="color:#037691" %)**AT+DI1TORO1 **(%%)**: **Set or get the mode in which DI1 maps to RO1(default 0) 145 -))) 146 - 147 -((( 148 -(% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:** Set or get the mode in which DI2 maps to DO2(default 0) 149 -))) 150 - 151 -((( 152 -(% style="color:#037691" %)**AT+DI2TORO2 **(%%)**: **Set or get the mode in which DI2 maps to RO2(default 0) 153 -))) 154 - 155 -((( 156 156 157 -))) 158 - 159 -((( 160 - 161 -))) 162 - 163 -((( 164 -(% style="color:#4f81bd" %)**Example 1:** 165 -))) 166 - 167 -((( 168 -**AT+SEND=01020304 **will send a payload of 01020304 169 -))) 170 - 171 -((( 172 - 173 -))) 174 - 175 -((( 176 -(% style="color:#4f81bd" %)**Example 2: ** 177 -))) 178 - 179 -((( 180 -**AT+TRIGx=a **Trigger directly without triggering time 181 -))) 182 - 183 -((( 184 -**AT+TRIGx=a,b** 185 -))) 186 - 187 -((( 188 -a=0: falling edge; 189 -))) 190 - 191 -((( 192 -a=1: rising edge; 193 -))) 194 - 195 -((( 196 -a=2: falling edge or rising edge; 197 -))) 198 - 199 -((( 200 -b: triggering time in milliseconds. 201 -))) 202 - 203 -((( 204 -AT+TRIGx=2,50 Falling edge or rising edge trigger, and the trigger time exceeds 50ms. 205 -))) 206 - 207 -((( 208 - 209 -))) 210 - 211 -((( 212 -(% style="color:#4f81bd" %)**Example 3: ** 213 -))) 214 - 215 -((( 216 -**AT+DI1TODO1= maps value** 217 -))) 218 - 219 -((( 220 -**AT+DI1TORO1= maps value** 221 -))) 222 - 223 -((( 224 -**AT+DI2TODO2= maps value** 225 -))) 226 - 227 -((( 228 -**AT+DI2TORO2= maps value** 229 -))) 230 - 231 -((( 232 - 233 -))) 234 - 235 -(% border="1" style="background-color:#f7faff; color:black; width:706px" %) 236 -|=(% style="width: 102px;" %)((( 237 -Maps value 238 -)))|=(% style="width: 331px;" %)((( 239 -DIx to DOx 240 -)))|=(% style="width: 268px;" %)((( 241 -DIx to ROx 242 -))) 243 -|(% style="width:102px" %)((( 244 -0 245 -)))|(% style="width:331px" %)((( 246 -No Action 247 -)))|(% style="width:268px" %)((( 248 -No Action 249 -))) 250 -|(% style="width:102px" %)((( 251 -1 252 -)))|(% style="width:331px" %)((( 253 -If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level 254 -)))|(% style="width:268px" %)((( 255 -((( 256 -If DIx is high, control ROx to close, 257 -))) 258 - 259 -((( 260 -if DIx is low, control ROx to open 261 -))) 262 -))) 263 -|(% style="width:102px" %)((( 264 -2 265 -)))|(% style="width:331px" %)((( 266 -If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level 267 -)))|(% style="width:268px" %)((( 268 -((( 269 -If DIx is high, control ROx to open, 270 -))) 271 - 272 -((( 273 -if DIx is low, control ROx to close 274 -))) 275 -))) 276 -|(% style="width:102px" %)((( 277 -3 278 -)))|(% style="width:331px" %)((( 279 -DOx state flip 280 -)))|(% style="width:268px" %)((( 281 -ROx state flip 282 -))) 283 - 284 -((( 285 -(% style="color:#4f81bd" %)**Example 4: ** 286 -))) 287 - 288 -((( 289 -**AT+GROUPMOD=0** Set to point to point mode 290 -))) 291 - 292 -((( 293 -**AT+GROUPMOD=0,aa** Set the TX group that controls the number of aa (The maximum value of aa is 8) 294 -))) 295 - 296 -((( 297 -((( 298 -**AT+GROUPMOD=1,bb** Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8) 299 -))) 300 -))) 301 - 302 -((( 303 -**AT+GROUPMOD=0,2** Set to control the TX group of the two RX groups 304 -))) 305 - 306 -((( 307 -**AT+GROUPMOD=1,1** Set the RX group numbered 1 308 -))) 309 - 310 -((( 311 -**AT+GROUPMOD=1,2** Set the RX group numbered 2 312 -))) 313 - 314 - 315 -== **2.4 Data Format** == 316 - 317 -((( 318 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum 319 -))) 320 - 321 -((( 322 - 323 -))) 324 - 325 -((( 326 -(% style="color:#4f81bd" %)**Payload:** 327 -))) 328 - 329 -(% border="1" style="background-color:#f7faff; color:black; width:938px" %) 330 -|=(% style="width: 123px;" %)((( 331 -**Size (bytes)** 332 -)))|=(% style="width: 107px;" %)((( 333 -1 334 -)))|=(% style="width: 107px;" %)((( 335 -1 336 -)))|=(% style="width: 107px;" %)((( 337 -1 338 -)))|=(% style="width: 107px;" %)((( 339 -1 340 -)))|=(% style="width: 107px;" %)((( 341 -1 342 -)))|=(% style="width: 107px;" %)((( 343 -1 344 -)))|=(% style="width: 107px;" %)((( 345 -1 346 -)))|=(% style="width: 107px;" %)((( 347 -1 348 -)))|=(% style="width: 107px;" %)((( 349 -1 350 -))) 351 -|(% style="width:123px" %)((( 352 -**Value** 353 -)))|(% style="width:38px" %)((( 354 -address 355 -)))|(% style="width:70px" %)((( 356 -request 357 -)))|(% style="width:52px" %)((( 358 -ACK 359 -)))|(% style="width:127px" %)((( 360 -((( 361 -DI1& 362 -))) 363 - 364 -((( 365 -DI1 level 366 -))) 367 -)))|(% style="width:101px" %)((( 368 -DI1TODO1 369 -)))|(% style="width:91px" %)((( 370 -DI1TORO1 371 -)))|(% style="width:111px" %)((( 372 -((( 373 -DI2& 374 -))) 375 - 376 -((( 377 -DI2 level 378 -))) 379 -)))|(% style="width:105px" %)((( 380 -DI2TODO2 381 -)))|(% style="width:106px" %)((( 382 -DI2TORO2 383 -))) 384 - 385 -((( 386 -(% style="color:#037691" %)**The first byte**(%%)**:** 00 is the broadcast address, 01-08 is the RX group number. 387 -))) 388 - 389 -((( 390 -(% style="color:#037691" %)**The second byte**(%%)**:** send mapping request when not 0, not request when it is 0. 391 -))) 392 - 393 -((( 394 -(% style="color:#037691" %)**The third byte**(%%)**:** ACK returned to the sender after the mapping is completed. 395 -))) 396 - 397 -((( 398 -((( 399 -(% 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. 400 -))) 401 -))) 402 - 403 -((( 404 -(% style="color:#037691" %)**The Fifth byte**(%%)**: **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered. 405 -))) 406 - 407 -((( 408 -(% style="color:#037691" %)**The Sixth byte**(%%)**:** 0 does not trigger interrupt when DI1TORO1 interrupt is triggered. 409 -))) 410 - 411 -((( 412 -((( 413 -(% 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. 414 -))) 415 -))) 416 - 417 -((( 418 -(% style="color:#037691" %)**The 8th byte**(%%)**: **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered. 419 -))) 420 - 421 -((( 422 -(% style="color:#037691" %)**The 9th byte**(%%)**:** DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered. 423 -))) 424 - 425 -