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1		-**~ Table of Contents:**
	1	+**~ Contents:**
2	2
	3	+(((
	4	+
	5	+)))
	6	+
3	3	{{toc/}}
4	4
5	5
6		-
7	7	= 1. OTAA Join Process Debug =
8	8
9	9	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.
...	...	@@ -182,7 +182,7 @@
182	182	Depends on Class A or Class C, the receive windows will be a little difference,
183	183	)))
184	184
185		-[[image:image-20220531161828-1.png]]
	188	+[[image:image-20220526164547-11.png]]
186	186
187	187	receive windows for Class A and Class C
188	188
...	...	@@ -335,24 +335,29 @@
335	335
336	336	(% class="box infomessage" %)
337	337	(((
338		-**Change to ABP Mode: AT+NJM=0**
339		-**Change to fix frequency: AT+CHS=904900000**
340		-**Change to fix DR: AT+DR=0**
	341	+Change to ABP Mode: AT+NJM=0
341	341	)))
342	342
343		-[[image:image-20220526165525-16.png]]
	344	+(% class="box infomessage" %)
	345	+(((
	346	+Change to fix frequency: AT+CHS=904900000
	347	+)))
344	344
	349	+(% class="box infomessage" %)
	350	+(((
	351	+Change to fix DR: AT+DR=0
	352	+)))
345	345
	354	+[[image:https://wiki.dragino.com/images/e/e6/Decrypt_a_LoRaWAN_Packet1.jpg||alt="Decrypt a LoRaWAN Packet1.jpg" height="607" width="558"]]
	355	+
346	346	2. In LG02 , configure to receive above message
347	347
348		-[[image:image-20220526165612-17.png]]
	358	+[[image:https://wiki.dragino.com/images/c/c3/Decrypt_a_LoRaWAN_Packet2.jpg||alt="Decrypt a LoRaWAN Packet2.jpg" height="337" width="558"]]
349	349
350		-
351	351	In LG02 console, we can see the hex receive are:
352	352
353		-[[image:image-20220526171112-21.png]]
	362	+[[image:https://wiki.dragino.com/images/f/f1/Decrypt_a_LoRaWAN_Packet3.jpg||alt="Decrypt a LoRaWAN Packet3.jpg" height="179" width="558"]]
354	354
355		-
356	356	3. Decode the info in web
357	357
358	358	[[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
...	...	@@ -367,7 +367,7 @@
367	367
368	368	[[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]]
369	369
370		-[[image:image-20220526171029-20.png]]
	378	+[[image:https://wiki.dragino.com/images/7/77/Decrypt_a_LoRaWAN_Packet4.png||alt="Decrypt a LoRaWAN Packet4.png" height="390" width="558"]]
371	371
372	372	(((
373	373	The FRMPayload is the device payload.
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378	378
379	379	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.
380	380
381		-
382	382	= 9. Why do I see a "MIC Mismatch" error message from the server? =
383	383
384	384	(((
...	...	@@ -425,74 +425,37 @@
425	425	* (((
426	426	Some node decoders may not have filtering function, or you need decoders of other servers and formats. Please send an email to [[david.huang@dragino.cc>>mailto:david.huang@dragino.cc]]
427	427
	435	+
428	428
429	429	)))
430	430
431	431	= 11. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
432	432
433		-(((
434	434	It is possible the keys is erased during upgrading of firmware. and the console output shows below after AT+CFG
435		-)))
436	436
437		-(((
438	438	AT+APPKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
439		-)))
440	440
441		-(((
442	442	AT+NWKSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
443		-)))
444	444
445		-(((
446	446	AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
447		-)))
448	448
449		-(((
450	450	AT+APPEUI=00 00 00 00 00 00 00 00
451		-)))
452	452
453		-(((
454		-
455		-)))
456	456
457		-(((
458	458	You can get the keys from the box sticker or send mail to Dragino Support to check keys with the provided SN number.
459		-)))
460	460
461		-(((
462	462	You can rewrites the keys by running commands in AT Console
463		-)))
464	464
465		-(((
466		-**For example：**
467		-)))
	456	+For example：
468	468
469		-(((
470	470	AT+APPKEY=85 41 47 20 45 58 28 14 16 82 A0 F0 80 0D DD EE
471		-)))
472	472
473		-(((
474	474	AT+NWKSKEY=AA CC B0 20 30 45 37 32 14 1E 14 93 E2 3B 20 11
475		-)))
476	476
477		-(((
478	478	AT+APPSKEY=11 23 02 20 30 20 30 60 80 20 20 30 30 20 10 10
479		-)))
480	480
481		-(((
482	482	AT+APPEUI=2C 45 47 E3 24 12 23 24
483		-)))
484	484
485		-(((
486	486	(Any combination of 16 bit codes can be used）
487	487
488	488
489		-= 12. I set my device is LoRaWAN Class C mode, why i still see Class A after boot? =
490		-)))
491		-
492		-
493		-Class C only refers to status after OTAA Join successfully. The OTAA Join Process will use Class A mode.
494		-
495		-
496		-
497		-(% class="wikigeneratedid" %)
498		-

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