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Last modified by Xiaoling on 2025/05/05 08:51
From version 4.3
edited by Xiaoling
on 2022/05/11 14:35
Change comment: There is no comment for this version
To version 4.6
edited by Xiaoling
on 2022/05/11 14:52
Change comment: There is no comment for this version

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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. )
... ... @@ -191,15 +191,23 @@
191 191  
192 192  == 5.2 See Debug Info ==
193 193  
198 +(((
194 194  **For LoRaWAN Server**
200 +)))
195 195  
202 +(((
196 196  We can check if there is downlink message for this end node, use TTN for example:
204 +)))
197 197  
206 +(((
198 198  Configure a downstream to the end device
208 +)))
199 199  
200 200  [[image:https://wiki.dragino.com/images/thumb/8/82/Downstream_debug_1.png/600px-Downstream_debug_1.png||height="217" width="600"]]
201 201  
212 +(((
202 202  Set a downstream in TTN and see it is sent
214 +)))
203 203  
204 204  
205 205  (((
... ... @@ -208,10 +208,14 @@
208 208  
209 209  [[image:https://wiki.dragino.com/images/thumb/d/dc/Downstream_debug_2.png/600px-Downstream_debug_2.png||height="245" width="600"]]
210 210  
223 +(((
211 211  Gateway Traffic can see this downstream info
225 +)))
212 212  
213 213  
228 +(((
214 214  **For LoRaWAN Gateway**
230 +)))
215 215  
216 216  (((
217 217  When the downstream packet appear on the traffic of Gateway page. The LoRaWAN gateway can get it from LoRaWAN server and transmit it. In Dragion Gateway, this can be checked by runinng "logread -f" in the SSH console. and see below:
... ... @@ -219,63 +219,69 @@
219 219  
220 220  [[image:https://wiki.dragino.com/images/thumb/2/21/Downstream_debug_3.png/600px-Downstream_debug_3.png||height="195" width="600"]]
221 221  
238 +(((
222 222  Gateway Sent out this packet
240 +)))
223 223  
224 224  
243 +(((
225 225  **For End Node**
245 +)))
226 226  
227 227  we can use AT Command (AT+CFG) to check the RX1 configure and RX2 configure. as below:
228 228  
229 229  (% class="box infomessage" %)
230 230  (((
231 - AT+RX2FQ=869525000 ~-~--> The RX2 Window frequency
251 + 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
256 + AT+RX2DR=3 ~-~--> The RX2 DataRate
237 237  )))
238 238  
239 239  (% class="box infomessage" %)
240 240  (((
241 - AT+RX1DL=1000 ~-~--> Receive Delay 1
261 + AT+RX1DL=1000 ~-~--> Receive Delay 1
242 242  )))
243 243  
244 244  (% class="box infomessage" %)
245 245  (((
246 - AT+RX2DL=2000 ~-~--> Receive Delay 2
266 + AT+RX2DL=2000 ~-~--> Receive Delay 2
247 247  )))
248 248  
249 -when the device running, we can see below info:
269 +**when the device running, we can see below info:**
250 250  
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)
272 +
260 260  )))
261 261  
275 +{{{ [12502]***** UpLinkCounter= 0 *****
276 + [12503]TX on freq 868500000 Hz at DR 0
277 + [13992]txDone
278 + [15022]RX on freq 868500000 Hz at DR 0 --> RX1 window open at frequency: 868500000, DR0, after 15022-13992= 1030ms of txdone
279 + [15222]rxTimeOut --> no packet arrive in RX1 window. (duration: 200ms)
280 + [15987]RX on freq 869525000 Hz at DR 3 --> RX2 window open at frequency: 869525000, DR3, after 15987-13992= 1995ms of txdone
281 + [16027]rxTimeOut --> no packet arrive in RX2 window. (duration: 40 ms)}}}
282 +
262 262  (((
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 -}}}
287 +**Another message:**
278 278  
289 +{{{
290 + [12502]***** UpLinkCounter= 0 *****
291 + [12503]TX on freq 868100000 Hz at DR 0
292 + [13992]txDone
293 + [15022]RX on freq 868100000 Hz at DR 0
294 + [15222]rxTimeOut
295 + [15987]RX on freq 869525000 Hz at DR 3
296 + [16185]rxDone --> We have got the downstream packet.
297 + Rssi= -64
298 + Receive data
299 + 1:0012345678}}}
300 +
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 +287,29 @@
287 287  
288 288  = 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
289 289  
312 +(((
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.
314 +)))
291 291  
316 +(((
317 +
318 +)))
319 +
320 +(((
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:
322 +)))
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 -}}}
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 +)))
296 296  
328 +(((
329 +
330 +)))
331 +
332 +(((
297 297  In this case, please double check the gateway frequency and the server frequency band.
334 +)))
298 298  
299 299  
300 300  = 7. Decrypt a LoRaWAN Packet =