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...	...	@@ -266,9 +266,7 @@
266	266	AT+RX2DL=2000 ~-~--> Receive Delay 2
267	267	)))
268	268
269		-(((
270	270	**when the device running, we can see below info:**
271		-)))
272	272
273	273	(((
274	274
...	...	@@ -286,11 +286,10 @@
286	286
287	287	)))
288	288
289		-(((
290	290	**Another message:**
291		-)))
292	292
293		-{{{ [12502]***** UpLinkCounter= 0 *****
	289	+{{{
	290	+ [12502]***** UpLinkCounter= 0 *****
294	294	[12503]TX on freq 868100000 Hz at DR 0
295	295	[13992]txDone
296	296	[15022]RX on freq 868100000 Hz at DR 0
...	...	@@ -324,7 +324,9 @@
324	324	So if the LoRaWAN server is an AS923 server which ask the gateway to transmit at 923.2Mhz frequency, but the gateway is IN868 frequency band (support 865~~867Mhz to transmit). In the gateway log it will show something like below:
325	325	)))
326	326
327		-{{{Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)}}}
	324	+(((
	325	+Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)
	326	+)))
328	328
329	329	(((
330	330
...	...	@@ -376,9 +376,7 @@
376	376
377	377	AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 11 (End Node App Session Key)
378	378
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		-)))
382	382
383	383	[[image:https://wiki.dragino.com/images/7/77/Decrypt_a_LoRaWAN_Packet4.png||alt="Decrypt a LoRaWAN Packet4.png" height="390" width="558"]]
384	384
...	...	@@ -391,58 +391,32 @@
391	391
392	392	= 9. Why do I see a "MIC Mismatch" error message from the server? =
393	393
394		-(((
395	395	1)If the user receives a "MIC Mismatch" message after registering the node on the server.
396		-)))
397	397
398		-(((
399	399	It is likely that the user filled in the wrong APPKEY when registering the node. Many users fill in "APPSKEY".
400		-)))
401	401
402		-* (((
403		-Please note the distinction between "APPKEY" and "APPSKEY".
404		-)))
	395	+* Please note the distinction between "APPKEY" and "APPSKEY".
405	405
406		-(((
407	407	2）If the node works on the server for a period of time, the device stops working and receives a "MIC Mismatch" message.
408		-)))
409	409
410		-(((
411	411	The user needs a USB-TTL adapter to connect the serial port to modify the node APPKEY.
412		-)))
413	413
414		-* (((
415		-If a node is registered with multiple servers, it may also cause the "mic mismatch" error.
416		-)))
	401	+* If a node is registered with multiple servers, it may also cause the "mic mismatch" error.
417	417
418	418	= 10. Why i got the payload only with "0x00" or "AA~=~="? =
419	419
420		-* (((
421		-If you are using US915, AU915 and AS923 frequencies.This is normal phenomenon.
422		-)))
	405	+* If you are using US915, AU915 and AS923 frequencies.This is normal phenomenon.
423	423
424		-(((
425	425	When using the frequency mentioned above, the server sometimes adjusts the rate of the node, because the node defaults to the adaptive rate.
426		-)))
427	427
428		-(((
429	429	When the server adjusts your node rate to 0, the maximum payload length is 11 bytes. The server sometimes sends an ADR packet to the node,
430		-)))
431	431
432		-(((
433	433	and the node will reply to the server after receiving the ADR packet, but the number of payload bytes exceeds the limit,
434		-)))
435	435
436		-(((
437	437	so it will send a normal uplink packet, and an additional 00 data packet.
438		-)))
439	439
440		-* (((
441		-Solution: Use the decoder to filter out this 00 packet.
442		-)))
443		-* (((
444		-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
445		-)))
	415	+* Solution: Use the decoder to filter out this 00 packet.
	416	+* 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
446	446
447	447	(% class="wikigeneratedid" id="H" %)
448	448