Last modified by Edwin Chen on 2025/01/29 20:30
<
From version < 23.1 >
edited by Xiaoling
on 2022/05/26 16:49
To version < 30.3 >
edited by Xiaoling
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1 1  **~ Contents:**
2 2  
3 -(((
4 -
5 -)))
6 -
7 7  {{toc/}}
8 8  
9 9  
6 +
10 10  = 1. OTAA Join Process Debug =
11 11  
12 12  These pages are useful to check what is wrong on the Join process. Below shows the four steps that we can check the Join Process.
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23 23  * If the device is sending join request to server?
24 24  * What frequency the device is sending?
25 25  
26 -[[image:image-20220526163523-1.png]]
23 +[[image:image-20220526164956-15.png]]
27 27  
28 28  Console Output from End device to see the transmit frequency
29 29  
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198 198  * This packet must match the DataRate of RX1(RX1DR) or RX2 (RX2DR). **This is the common fail point, because different lorawan server might use different RX2DR and they don't info End Node via ADR message so cause the mismatch. If this happen, user need to change the RX2DR to the right value in end node. In OTAA, LoRaWAN Server will send the RX2DR setting in Join Accept message so the end node will auto adjust. but ABP uplink doesn't support this auto change.**
199 199  
200 200  
198 +
201 201  == 5.2 See Debug Info ==
202 202  
203 203  (((
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301 301  
302 302  == 5.3 If problem doesn’t solve ==
303 303  
304 -**If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the sceenshots for each step to check. They include:**
302 +(% style="color:red" %)**If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the sceenshots for each step to check. They include:**
305 305  
306 306  * End node console to show the transmit freuqency and DR.
307 307  * Gateway (from gateway UI) traffic to show the packet got from end node and receive from Server.
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308 308  * Gateway traffic (from server UI) to shows the data exchange between gateway and server.
309 309  * End Node traffic (from server UI) to shows end node activity in server.
310 310  
311 -(% class="wikigeneratedid" %)
312 -​​​​​​​
313 313  
310 +
314 314  = 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
315 315  
316 316  (((
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342 342  
343 343  (% class="box infomessage" %)
344 344  (((
345 -Change to ABP Mode: AT+NJM=0
342 +**Change to ABP Mode: AT+NJM=0**
346 346  )))
347 347  
348 348  (% class="box infomessage" %)
349 349  (((
350 -Change to fix frequency: AT+CHS=904900000
347 +**Change to fix frequency: AT+CHS=904900000**
351 351  )))
352 352  
353 353  (% class="box infomessage" %)
354 354  (((
355 -Change to fix DR: AT+DR=0
352 +**Change to fix DR: AT+DR=0**
356 356  )))
357 357  
358 -[[image:https://wiki.dragino.com/images/e/e6/Decrypt_a_LoRaWAN_Packet1.jpg||alt="Decrypt a LoRaWAN Packet1.jpg" height="607" width="558"]]
355 +[[image:image-20220526165525-16.png]]
359 359  
357 +
360 360  2. In LG02 , configure to receive above message
361 361  
362 -[[image:https://wiki.dragino.com/images/c/c3/Decrypt_a_LoRaWAN_Packet2.jpg||alt="Decrypt a LoRaWAN Packet2.jpg" height="337" width="558"]]
360 +[[image:image-20220526165612-17.png]]
363 363  
362 +
364 364  In LG02 console, we can see the hex receive are:
365 365  
366 -[[image:https://wiki.dragino.com/images/f/f1/Decrypt_a_LoRaWAN_Packet3.jpg||alt="Decrypt a LoRaWAN Packet3.jpg" height="179" width="558"]]
365 +[[image:image-20220526171112-21.png]]
367 367  
367 +
368 368  3. Decode the info in web
369 369  
370 370  [[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
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379 379  
380 380  [[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh/?data=40c1190126800100024926272bf18bbb6341584e27e23245&nwkskey=00000000000000000000000000000111&appskey=00000000000000000000000000000111>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/?data=40c1190126800100024926272bf18bbb6341584e27e23245&nwkskey=00000000000000000000000000000111&appskey=00000000000000000000000000000111]]
381 381  
382 -[[image:https://wiki.dragino.com/images/7/77/Decrypt_a_LoRaWAN_Packet4.png||alt="Decrypt a LoRaWAN Packet4.png" height="390" width="558"]]
382 +[[image:image-20220526171029-20.png]]
383 383  
384 384  (((
385 385   The FRMPayload is the device payload.
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390 390  
391 391  Since firmware v1.8, LHT65 will send MAC command to request time, in the case if DR only support max 11 bytes, this MAC command will be bundled to a separate uplink payload with 0x00.
392 392  
393 +
393 393  = 9. Why do I see a "MIC Mismatch" error message from the server? =
394 394  
395 395  (((
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442 442  
443 443  = 11. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
444 444  
446 +(((
445 445  It is possible the keys is erased during upgrading of firmware. and the console output shows below after AT+CFG
448 +)))
446 446  
450 +(((
447 447  AT+APPKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
452 +)))
448 448  
454 +(((
449 449  AT+NWKSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
456 +)))
450 450  
458 +(((
451 451  AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
460 +)))
452 452  
462 +(((
453 453  AT+APPEUI=00 00 00 00 00 00 00 00
464 +)))
454 454  
466 +(((
467 +
468 +)))
455 455  
470 +(((
456 456  You can get the keys from the box sticker or send mail to Dragino Support to check keys with the provided SN number.
472 +)))
457 457  
474 +(((
458 458  You can rewrites the keys by running commands in AT Console
476 +)))
459 459  
460 -For example：
478 +(((
479 +**For example：**
480 +)))
461 461  
482 +(((
462 462  AT+APPKEY=85 41 47 20 45 58 28 14 16 82 A0 F0 80 0D DD EE
484 +)))
463 463  
486 +(((
464 464  AT+NWKSKEY=AA CC B0 20 30 45 37 32 14 1E 14 93 E2 3B 20 11
488 +)))
465 465  
490 +(((
466 466  AT+APPSKEY=11 23 02 20 30 20 30 60 80 20 20 30 30 20 10 10
492 +)))
467 467  
494 +(((
468 468  AT+APPEUI=2C 45 47 E3 24 12 23 24
496 +)))
469 469  
498 +(((
470 470  (Any combination of 16 bit codes can be used）
500 +)))
471 471  
472 472  
473 473  (% class="wikigeneratedid" %)
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