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...	...	@@ -104,7 +104,9 @@
104	104
105	105	[[image:https://wiki.dragino.com/images/thumb/3/3a/CN470_FRE_BAND-1.png/600px-CN470_FRE_BAND-1.png||height="205" width="600"]]
106	106
	107	+(((
107	107	CN470 Channels
	109	+)))
108	108
109	109	(((
110	110	If we look at the [[TTN network server frequency plan>>url:https://www.thethingsnetwork.org/docs/lorawan/frequency-plans.html]], we can see the US915 frequency band use the channel 8~~15.So the End Node must work at the same frequency in US915 8~~15 channels for TTN server.
...	...	@@ -112,7 +112,9 @@
112	112
113	113	[[image:https://wiki.dragino.com/images/thumb/9/9a/US915_FRE_BAND-2.png/600px-US915_FRE_BAND-2.png||height="288" width="600"]]
114	114
	117	+(((
115	115	TTN FREQUENCY PLAN
	119	+)))
116	116
117	117	(((
118	118	In dragino end node, user can use AT+CHE command to set what frequencies set the end node will use. The default settings for Dragino end node are preconfigure for TTN server, so use 8~~15 channels, which is **AT+CHE=2**. (AT+CHE=1 for first 8 channels, AT+CHE=2 for second 8 channels.. etc, and AT+CHE=0 for all 72 channels. )
...	...	@@ -228,35 +228,41 @@
228	228
229	229	(% class="box infomessage" %)
230	230	(((
231		- AT+RX2FQ=869525000 ~-~--> The RX2 Window frequency
	235	+ AT+RX2FQ=869525000 ~-~--> The RX2 Window frequency
232	232	)))
233	233
234	234	(% class="box infomessage" %)
235	235	(((
236		- AT+RX2DR=3 ~-~--> The RX2 DataRate
	240	+ AT+RX2DR=3 ~-~--> The RX2 DataRate
237	237	)))
238	238
239	239	(% class="box infomessage" %)
240	240	(((
241		- AT+RX1DL=1000 ~-~--> Receive Delay 1
	245	+ AT+RX1DL=1000 ~-~--> Receive Delay 1
242	242	)))
243	243
244	244	(% class="box infomessage" %)
245	245	(((
246		- AT+RX2DL=2000 ~-~--> Receive Delay 2
	250	+ AT+RX2DL=2000 ~-~--> Receive Delay 2
247	247	)))
248	248
249		-when the device running, we can see below info:
	253	+(((
	254	+**when the device running, we can see below info:**
	255	+)))
250	250
	257	+(((
	258	+
	259	+)))
	260	+
251	251	(% class="box" %)
252	252	(((
253		-[12502]~*~*~*~** UpLinkCounter= 0 ~*~*~*~**
254		-[12503]TX on freq 868500000 Hz at DR 0
255		-[13992]txDone
256		-[15022]RX on freq 868500000 Hz at DR 0     ~-~-> RX1 window open at frequency: 868500000, DR0, after 15022-13992= 1030ms of txdone
257		-[15222]rxTimeOut                           ~-~-> no packet arrive in RX1 window. (duration: 200ms)
258		-[15987]RX on freq 869525000 Hz at DR 3     ~-~-> RX2 window open at frequency: 869525000, DR3, after 15987-13992= 1995ms of txdone
259		-[16027]rxTimeOut                           ~-~-> no packet arrive in RX2 window. (duration: 40 ms)
	263	+ [12502]~*~*~*~** UpLinkCounter= 0 ~*~*~*~**
	264	+ [12503]TX on freq 868500000 Hz at DR 0
	265	+ [13992]txDone
	266	+ [15022]RX on freq 868500000 Hz at DR 0     ~-~-> RX1 window open at frequency: 868500000, DR0, after 15022-13992= 1030ms of txdone
	267	+ [15222]rxTimeOut                           ~-~-> no packet arrive in RX1 window. (duration: 200ms)
	268	+ [15987]RX on freq 869525000 Hz at DR 3     ~-~-> RX2 window open at frequency: 869525000, DR3, after 15987-13992= 1995ms of txdone
	269	+ [16027]rxTimeOut                           ~-~-> no packet arrive in RX2 window. (duration: 40 ms)
260	260	)))
261	261
262	262	(((
...	...	@@ -263,19 +263,22 @@
263	263
264	264	)))
265	265
266		-{{{Another message:
267		-[12502]***** UpLinkCounter= 0 *****
268		-[12503]TX on freq 868100000 Hz at DR 0
269		-[13992]txDone
270		-[15022]RX on freq 868100000 Hz at DR 0
271		-[15222]rxTimeOut
272		-[15987]RX on freq 869525000 Hz at DR 3
273		-[16185]rxDone --> We have got the downstream packet.
274		-Rssi= -64
275		-Receive data
276		-1:0012345678
277		-}}}
	276	+(((
	277	+**Another message:**
	278	+)))
278	278
	280	+
	281	+ [12502]~*~*~*~** UpLinkCounter= 0 ~*~*~*~**
	282	+ [12503]TX on freq 868100000 Hz at DR 0
	283	+ [13992]txDone
	284	+ [15022]RX on freq 868100000 Hz at DR 0
	285	+ [15222]rxTimeOut
	286	+ [15987]RX on freq 869525000 Hz at DR 3
	287	+ [16185]rxDone                              ~-~-> We have got the downstream packet.
	288	+ Rssi= -64
	289	+ Receive data
	290	+ 1:0012345678
	291	+
279	279	== 5.3 If problem doesn’t solve ==
280	280
281	281	**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:**
...	...	@@ -287,14 +287,25 @@
287	287
288	288	= 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
289	289
	303	+(((
290	290	In LoRaWAN, the gatewat will use the frequency specify by the server to transmit a packet as downlink purpose. Each Frequency band has different downlink frequency. and the gateway has a frequency range limited to transmit downlink.
	305	+)))
291	291
	307	+(((
	308	+
	309	+)))
	310	+
	311	+(((
292	292	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:
	313	+)))
293	293
294		-{{{Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)
295		-}}}
	315	+(((
	316	+Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)
	317	+)))
296	296
	319	+(((
297	297	In this case, please double check the gateway frequency and the server frequency band.
	321	+)))
298	298
299	299
300	300	= 7. Decrypt a LoRaWAN Packet =