Changes for page LA66 LoRaWAN Shield User Manual
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... ... @@ -1,41 +1,23 @@ 1 - 2 - 3 -**Table of Contents:** 4 - 1 +{{box cssClass="floatinginfobox" title="**Contents**"}} 5 5 {{toc/}} 3 +{{/box}} 6 6 5 += LA66 LoRaWAN Module = 7 7 7 +== What is LA66 LoRaWAN Module == 8 8 9 -= 1. LA66 LoRaWAN Module = 10 - 11 - 12 -== 1.1 What is LA66 LoRaWAN Module == 13 - 14 - 15 -((( 16 -[[image:image-20220715000242-1.png||height="110" width="132"]] 17 - 18 18 (% style="color:blue" %)**Dragino LA66**(%%) is a small wireless LoRaWAN module that offers a very compelling mix of long-range, low power consumption, and secure data transmission. It is designed to facilitate developers to quickly deploy industrial-level LoRaWAN and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to create and connect your things everywhere. 19 -))) 20 20 21 -((( 22 22 (% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol. 23 -))) 24 24 25 -((( 26 26 Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration. 27 -))) 28 28 29 -((( 30 30 Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application. 31 -))) 32 32 33 -((( 34 34 LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures. 35 -))) 36 36 37 37 38 -== 1.2Features ==20 +== Features == 39 39 40 40 * Support LoRaWAN v1.0.4 protocol 41 41 * Support peer-to-peer protocol ... ... @@ -47,9 +47,8 @@ 47 47 * Firmware upgradable via UART interface 48 48 * Ultra-long RF range 49 49 32 +== Specification == 50 50 51 -== 1.3 Specification == 52 - 53 53 * CPU: 32-bit 48 MHz 54 54 * Flash: 256KB 55 55 * RAM: 64KB ... ... @@ -68,61 +68,50 @@ 68 68 * LoRa Rx current: <9 mA 69 69 * I/O Voltage: 3.3v 70 70 52 +== AT Command == 71 71 72 -== 1.4 AT Command == 73 - 74 74 AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents. 75 75 76 76 77 -== 1.5Dimension ==57 +== Dimension == 78 78 79 79 [[image:image-20220517072526-1.png]] 80 80 81 81 62 +== Pin Mapping == 82 82 83 -== 1.6 Pin Mapping == 84 - 85 - 86 86 [[image:image-20220523101537-1.png]] 87 87 66 +== Land Pattern == 88 88 89 - 90 -== 1.7 Land Pattern == 91 - 92 92 [[image:image-20220517072821-2.png]] 93 93 94 94 71 +== Order Info == 95 95 96 - =2.LA66LoRaWAN Shield =73 +Part Number: **LA66-XXX** 97 97 75 +**XX**: The default frequency band 98 98 99 -== 2.1 Overview == 77 +* **AS923**: LoRaWAN AS923 band 78 +* **AU915**: LoRaWAN AU915 band 79 +* **EU433**: LoRaWAN EU433 band 80 +* **EU868**: LoRaWAN EU868 band 81 +* **KR920**: LoRaWAN KR920 band 82 +* **US915**: LoRaWAN US915 band 83 +* **IN865**: LoRaWAN IN865 band 84 +* **CN470**: LoRaWAN CN470 band 85 +* **PP**: Peer to Peer LoRa Protocol 100 100 87 += LA66 LoRaWAN Shield = 101 101 102 - [[image:image-20220715000826-2.png||height="386"width="449"]]89 +== Overview == 103 103 104 - 105 105 LA66 LoRaWAN Shield is the Arduino shield base on LA66. Users can use LA66 LoRaWAN Shield to rapidly add LoRaWAN or peer-to-peer LoRa wireless function to Arduino projects. 106 106 107 -((( 108 -(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol. 109 -))) 110 110 111 -((( 112 -Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration. 113 -))) 94 +== Features == 114 114 115 -((( 116 -Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application. 117 -))) 118 - 119 -((( 120 -LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures. 121 -))) 122 - 123 - 124 -== 2.2 Features == 125 - 126 126 * Arduino Shield base on LA66 LoRaWAN module 127 127 * Support LoRaWAN v1.0.4 protocol 128 128 * Support peer-to-peer protocol ... ... @@ -134,9 +134,8 @@ 134 134 * Firmware upgradable via UART interface 135 135 * Ultra-long RF range 136 136 107 +== Specification == 137 137 138 -== 2.3 Specification == 139 - 140 140 * CPU: 32-bit 48 MHz 141 141 * Flash: 256KB 142 142 * RAM: 64KB ... ... @@ -155,28 +155,18 @@ 155 155 * LoRa Rx current: <9 mA 156 156 * I/O Voltage: 3.3v 157 157 127 +== Pin Mapping & LED == 158 158 159 -== 2.4PinMapping&LED==129 +== Example: Use AT Command to communicate with LA66 module via Arduino UNO. == 160 160 131 +== Example: Join TTN network and send an uplink message, get downlink message. == 161 161 133 +== Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. == 162 162 163 -== 2.5 Example:Use AT Commandto communicatewithLA66module viarduino UNO.==135 +== Upgrade Firmware of LA66 LoRaWAN Shield == 164 164 137 +=== Items needed for update === 165 165 166 - 167 -== 2.6 Example: Join TTN network and send an uplink message, get downlink message. == 168 - 169 - 170 - 171 -== 2.7 Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. == 172 - 173 - 174 - 175 -== 2.8 Upgrade Firmware of LA66 LoRaWAN Shield == 176 - 177 - 178 -=== 2.8.1 Items needed for update === 179 - 180 180 1. LA66 LoRaWAN Shield 181 181 1. Arduino 182 182 1. USB TO TTL Adapter ... ... @@ -184,23 +184,15 @@ 184 184 [[image:image-20220602100052-2.png||height="385" width="600"]] 185 185 186 186 187 -=== 2.8.2Connection ===146 +=== Connection === 188 188 189 - 190 190 [[image:image-20220602101311-3.png||height="276" width="600"]] 191 191 150 +(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%) <-> (% style="color:blue" %)**USB TTL**(%%) 151 +**GND <-> GND 152 +TXD <-> TXD 153 +RXD <-> RXD** 192 192 193 -((( 194 -(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%) **<->** (% style="color:blue" %)**USB TTL** 195 -))) 196 - 197 -((( 198 -(% style="background-color:yellow" %)**GND <-> GND 199 -TXD <-> TXD 200 -RXD <-> RXD** 201 -))) 202 - 203 - 204 204 Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module) 205 205 206 206 Connect USB TTL Adapter to PC after connecting the wires ... ... @@ -209,102 +209,91 @@ 209 209 [[image:image-20220602102240-4.png||height="304" width="600"]] 210 210 211 211 212 -=== 2.8.3Upgrade steps ===163 +=== Upgrade steps === 213 213 165 +==== Switch SW1 to put in ISP position ==== 214 214 215 -==== 1. Switch SW1 to put in ISP position ==== 216 - 217 - 218 218 [[image:image-20220602102824-5.png||height="306" width="600"]] 219 219 220 220 170 +==== Press the RST switch once ==== 221 221 222 -==== 2. Press the RST switch once ==== 223 - 224 - 225 225 [[image:image-20220602104701-12.png||height="285" width="600"]] 226 226 227 227 175 +==== Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ==== 228 228 229 - ==== 3.OpentheUpgradetool (TremoProgrammer)inPC andgrade===177 +**~1. Software download link: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/>>https://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/]]** 230 230 231 - 232 -((( 233 -(% style="color:blue" %)**1. Software download link: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/>>https://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/]]** 234 -))) 235 - 236 - 237 237 [[image:image-20220602103227-6.png]] 238 238 239 - 240 240 [[image:image-20220602103357-7.png]] 241 241 242 242 243 - 244 244 (% class="wikigeneratedid" id="HSelecttheCOMportcorrespondingtoUSBTTL" %) 245 - (% style="color:blue" %)**2. Select the COM port corresponding to USB TTL**185 +**2. Select the COM port corresponding to USB TTL** 246 246 247 - 248 248 [[image:image-20220602103844-8.png]] 249 249 250 250 251 - 252 252 (% class="wikigeneratedid" id="HSelectthebinfiletoburn" %) 253 - (% style="color:blue" %)**3. Select the bin file to burn**191 +**3. Select the bin file to burn** 254 254 255 - 256 256 [[image:image-20220602104144-9.png]] 257 257 258 - 259 259 [[image:image-20220602104251-10.png]] 260 260 261 - 262 262 [[image:image-20220602104402-11.png]] 263 263 264 264 265 - 266 266 (% class="wikigeneratedid" id="HClicktostartthedownload" %) 267 - (% style="color:blue" %)**4. Click to start the download**201 +**4. Click to start the download** 268 268 269 269 [[image:image-20220602104923-13.png]] 270 270 271 271 272 - 273 273 (% class="wikigeneratedid" id="HThefollowingfigureappearstoprovethattheburningisinprogress" %) 274 - (% style="color:blue" %)**5. Check update process**207 +**5. Check update process** 275 275 276 - 277 277 [[image:image-20220602104948-14.png]] 278 278 279 279 280 - 281 281 (% class="wikigeneratedid" id="HThefollowingpictureappearstoprovethattheburningissuccessful" %) 282 - (% style="color:blue" %)**The following picture shows that the burning is successful**213 +**The following picture shows that the burning is successful** 283 283 284 284 [[image:image-20220602105251-15.png]] 285 285 286 286 218 +== Order Info == 287 287 288 - =3.LA66USBLoRaWANAdapter =220 +Part Number: **LA66-LoRaWAN-Shield-XXX** 289 289 222 +**XX**: The default frequency band 290 290 291 -== 3.1 Overview == 224 +* **AS923**: LoRaWAN AS923 band 225 +* **AU915**: LoRaWAN AU915 band 226 +* **EU433**: LoRaWAN EU433 band 227 +* **EU868**: LoRaWAN EU868 band 228 +* **KR920**: LoRaWAN KR920 band 229 +* **US915**: LoRaWAN US915 band 230 +* **IN865**: LoRaWAN IN865 band 231 +* **CN470**: LoRaWAN CN470 band 232 +* **PP**: Peer to Peer LoRa Protocol 292 292 293 - [[image:image-20220715001142-3.png||height="145"width="220"]]234 +== Package Info == 294 294 295 -(% style="color:blue" %)**LA66 USB LoRaWAN Adapter**(%%) is designed to fast turn USB devices to support LoRaWAN wireless features. It combines a CP2101 USB TTL Chip and LA66 LoRaWAN module which can easy to add LoRaWAN wireless feature to PC / Mobile phone or an embedded device that has USB Interface. 236 +* LA66 LoRaWAN Shield x 1 237 +* RF Antenna x 1 296 296 297 - (% style="color:blue"%)**LA66**(%%)isa ready-to-use module that includes the (% style="color:blue" %)**LoRaWANv1.0.4 protocol**(%%). The LoRaWAN stack usedin LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This matureLoRaWAN stack greatlyreduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.239 += LA66 USB LoRaWAN Adapter = 298 298 299 - Each LA66 module includes a (% style="color:blue"%)**world-uniqueOTAA key**(%%) forLoRaWAN registration.241 +== Overview == 300 300 301 -Be sides the supportof theLoRaWANprotocol, LA66 alsosupports(% style="color:blue"%)**open-sourcepeer-to-peerLoRaProtocol**(%%)for thenone-LoRaWANapplication.243 +LA66 USB LoRaWAN Adapter is designed to fast turn USB devices to support LoRaWAN wireless features. It combines a CP2101 USB TTL Chip and LA66 LoRaWAN module which can easy to add LoRaWAN wireless feature to PC / Mobile phone or an embedded device that has USB Interface. 302 302 303 -LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures. 304 304 246 +== Features == 305 305 306 -== 3.2 Features == 307 - 308 308 * LoRaWAN USB adapter base on LA66 LoRaWAN module 309 309 * Ultra-long RF range 310 310 * Support LoRaWAN v1.0.4 protocol ... ... @@ -315,11 +315,9 @@ 315 315 * World-wide unique OTAA keys. 316 316 * AT Command via UART-TTL interface 317 317 * Firmware upgradable via UART interface 318 -* Open Source Mobile App for LoRaWAN signal detect and GPS tracking. 319 319 259 +== Specification == 320 320 321 -== 3.3 Specification == 322 - 323 323 * CPU: 32-bit 48 MHz 324 324 * Flash: 256KB 325 325 * RAM: 64KB ... ... @@ -336,23 +336,16 @@ 336 336 * LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm 337 337 * LoRa Rx current: <9 mA 338 338 277 +== Pin Mapping & LED == 339 339 340 -== 3.4Pin Mapping&LED==279 +== Example Send & Get Messages via LoRaWAN in PC == 341 341 342 - 343 - 344 -== 3.5 Example: Send & Get Messages via LoRaWAN in PC == 345 - 346 - 347 347 Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage. 348 348 283 +~1. Connect the LA66 USB LoRaWAN adapter to PC 349 349 350 -(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC** 351 - 352 - 353 353 [[image:image-20220602171217-1.png||height="538" width="800"]] 354 354 355 - 356 356 Open the serial port tool 357 357 358 358 [[image:image-20220602161617-8.png]] ... ... @@ -360,75 +360,67 @@ 360 360 [[image:image-20220602161718-9.png||height="457" width="800"]] 361 361 362 362 294 +2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it. 363 363 364 -(% style="color:blue" %)**2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it.** 365 - 366 366 The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully Join the LoRaWAN network 367 367 368 - 369 369 [[image:image-20220602161935-10.png||height="498" width="800"]] 370 370 371 371 301 +3. See Uplink Command 372 372 373 - (%style="color:blue"%)**3.See Uplink Command**303 +Command format: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data> 374 374 375 -Command format: (% style="color:#4472c4" %)** AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>** 376 - 377 377 example: AT+SENDB=01,02,8,05820802581ea0a5 378 378 379 379 [[image:image-20220602162157-11.png||height="497" width="800"]] 380 380 381 381 310 +4. Check to see if TTN received the message 382 382 383 -(% style="color:blue" %)**4. Check to see if TTN received the message** 384 - 385 385 [[image:image-20220602162331-12.png||height="420" width="800"]] 386 386 387 387 388 388 389 -== 3.6Example:316 +== Example:Send PC's CPU/RAM usage to TTN via python == 390 390 318 +(% class="wikigeneratedid" id="HUsepythonasanexampleFF1A" %) 319 +**Use python as an example:** 391 391 392 -**Use python as an example:**[[https:~~/~~/github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py>>https://github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py]] 321 +(% class="wikigeneratedid" id="HPreconditions:" %) 322 +**Preconditions:** 393 393 324 +1.LA66 USB LoRaWAN Adapter works fine 394 394 395 - (%style="color:red" %)**Preconditions:**326 +2.LA66 USB LoRaWAN Adapter is registered with TTN 396 396 397 -(% style="color:red" %)**1. LA66 USB LoRaWAN Adapter works fine** 328 +(% class="wikigeneratedid" id="HStepsforusage" %) 329 +**Steps for usage** 398 398 399 - (%style="color:red"%)**2.LA66 USB LoRaWAN Adapteris registered with TTN**331 +1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter 400 400 333 +2.Run the python script in PC and see the TTN 401 401 402 - 403 -(% style="color:blue" %)**Steps for usage:** 404 - 405 -(% style="color:blue" %)**1.**(%%) Press the reset switch RESET on the LA66 USB LoRaWAN Adapter 406 - 407 -(% style="color:blue" %)**2.**(%%) Run the python script in PC and see the TTN 408 - 409 409 [[image:image-20220602115852-3.png||height="450" width="1187"]] 410 410 411 411 412 412 413 -== 3.7Example:Send & Get Messages via LoRaWAN in RPi ==339 +== Example Send & Get Messages via LoRaWAN in RPi == 414 414 415 - 416 416 Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage. 417 417 343 +~1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi 418 418 419 -(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi** 420 - 421 421 [[image:image-20220602171233-2.png||height="538" width="800"]] 422 422 423 423 348 +2. Install Minicom in RPi. 424 424 425 -(% style="color:blue" %)**2. Install Minicom in RPi.** 426 - 427 427 (% id="cke_bm_509388S" style="display:none" %) (%%)Enter the following command in the RPi terminal 428 428 429 - style="background-color:yellow" %)**apt update**352 +(% class="mark" %)apt update 430 430 431 - style="background-color:yellow" %)**apt install minicom**354 +(% class="mark" %)apt install minicom 432 432 433 433 434 434 Use minicom to connect to the RPI's terminal ... ... @@ -436,27 +436,20 @@ 436 436 [[image:image-20220602153146-3.png||height="439" width="500"]] 437 437 438 438 362 +3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter. 363 +The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network 439 439 440 -(% style="color:blue" %)**3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter.** 441 - 442 -The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network. 443 - 444 - 445 445 [[image:image-20220602154928-5.png||height="436" width="500"]] 446 446 447 447 368 +4. Send Uplink message 448 448 449 - (% style="color:blue"%)**4.Send Uplink message**370 +Format: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data> 450 450 451 -Format: (% style="color:#4472c4" %)**AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>** 452 - 453 453 example: AT+SENDB=01,02,8,05820802581ea0a5 454 454 455 - 456 456 [[image:image-20220602160339-6.png||height="517" width="600"]] 457 457 458 - 459 - 460 460 Check to see if TTN received the message 461 461 462 462 [[image:image-20220602160627-7.png||height="369" width="800"]] ... ... @@ -463,35 +463,35 @@ 463 463 464 464 465 465 466 -== 3.8Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==382 +== Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. == 467 467 468 468 385 +== Upgrade Firmware of LA66 USB LoRaWAN Adapter == 469 469 470 -== 3.9 Upgrade Firmware of LA66 USB LoRaWAN Adapter == 471 471 472 472 389 +== Order Info == 473 473 391 +Part Number: **LA66-USB-LoRaWAN-Adapter-XXX** 474 474 475 - =4.OrderInfo=393 +**XX**: The default frequency band 476 476 395 +* **AS923**: LoRaWAN AS923 band 396 +* **AU915**: LoRaWAN AU915 band 397 +* **EU433**: LoRaWAN EU433 band 398 +* **EU868**: LoRaWAN EU868 band 399 +* **KR920**: LoRaWAN KR920 band 400 +* **US915**: LoRaWAN US915 band 401 +* **IN865**: LoRaWAN IN865 band 402 +* **CN470**: LoRaWAN CN470 band 403 +* **PP**: Peer to Peer LoRa Protocol 477 477 478 - **Part Number:** (% style="color:blue" %)**LA66-XXX**(%%), (% style="color:blue"%)**LA66-LoRaWAN-Shield-XXX**(%%) **or**(% style="color:blue" %)**LA66-USB-LoRaWAN-Adapter-XXX**405 +== Package Info == 479 479 407 +* LA66 USB LoRaWAN Adapter x 1 480 480 481 - (% style="color:blue"%)**XXX**(%%): Thedefault frequencyband409 += Reference = 482 482 483 -* (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band 484 -* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band 485 -* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band 486 -* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band 487 -* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band 488 -* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band 489 -* (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band 490 -* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band 491 -* (% style="color:red" %)**PP**(%%): Peer to Peer LoRa Protocol 492 - 493 -= 5. Reference = 494 - 495 495 * Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]] 496 496 497 497
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