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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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197	197	* This packet must match the frequency of the RX1 or RX2 window.
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
	197	+
	198	+
200	200	== 5.2 See Debug Info ==
201	201
202	202	(((
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307	307	* Gateway traffic (from server UI) to shows the data exchange between gateway and server.
308	308	* End Node traffic (from server UI) to shows end node activity in server.
309	309
	309	+
	310	+
310	310	= 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
311	311
312	312	(((
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338	338
339	339	(% class="box infomessage" %)
340	340	(((
341		-Change to ABP Mode: AT+NJM=0
	342	+**Change to ABP Mode: AT+NJM=0**
342	342	)))
343	343
344	344	(% class="box infomessage" %)
345	345	(((
346		-Change to fix frequency: AT+CHS=904900000
	347	+**Change to fix frequency: AT+CHS=904900000**
347	347	)))
348	348
349	349	(% class="box infomessage" %)
350	350	(((
351		-Change to fix DR: AT+DR=0
	352	+**Change to fix DR: AT+DR=0**
352	352	)))
353	353
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	+[[image:image-20220526165525-16.png]]
355	355
	357	+
356	356	2. In LG02 , configure to receive above message
357	357
358		-[[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]]
359	359
	362	+
360	360	In LG02 console, we can see the hex receive are:
361	361
362		-[[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]]
363	363
	367	+
364	364	3. Decode the info in web
365	365
366	366	[[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
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375	375
376	376	[[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]]
377	377
378		-[[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]]
379	379
380	380	(((
381	381	The FRMPayload is the device payload.
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386	386
387	387	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.
388	388
	393	+
389	389	= 9. Why do I see a "MIC Mismatch" error message from the server? =
390	390
391	391	(((
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438	438
439	439	= 11. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
440	440
	446	+(((
441	441	It is possible the keys is erased during upgrading of firmware. and the console output shows below after AT+CFG
	448	+)))
442	442
	450	+(((
443	443	AT+APPKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
	452	+)))
444	444
	454	+(((
445	445	AT+NWKSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
	456	+)))
446	446
	458	+(((
447	447	AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
	460	+)))
448	448
	462	+(((
449	449	AT+APPEUI=00 00 00 00 00 00 00 00
	464	+)))
450	450
	466	+(((
	467	+
	468	+)))
451	451
	470	+(((
452	452	You can get the keys from the box sticker or send mail to Dragino Support to check keys with the provided SN number.
	472	+)))
453	453
	474	+(((
454	454	You can rewrites the keys by running commands in AT Console
	476	+)))
455	455
456		-For example：
	478	+(((
	479	+**For example：**
	480	+)))
457	457
	482	+(((
458	458	AT+APPKEY=85 41 47 20 45 58 28 14 16 82 A0 F0 80 0D DD EE
	484	+)))
459	459
	486	+(((
460	460	AT+NWKSKEY=AA CC B0 20 30 45 37 32 14 1E 14 93 E2 3B 20 11
	488	+)))
461	461
	490	+(((
462	462	AT+APPSKEY=11 23 02 20 30 20 30 60 80 20 20 30 30 20 10 10
	492	+)))
463	463
	494	+(((
464	464	AT+APPEUI=2C 45 47 E3 24 12 23 24
	496	+)))
465	465
	498	+(((
466	466	(Any combination of 16 bit codes can be used）
	500	+)))
467	467
468	468
	503	+(% class="wikigeneratedid" %)
	504	+

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