Last modified by Edwin Chen on 2025/01/29 20:30
<
From version < 4.4 >
edited by Xiaoling
on 2022/05/11 14:42
To version < 32.8 >
edited by Xiaoling
on 2022/07/13 15:10
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Summary

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Content
... ... @@ -1,10 +1,12 @@
1 -**~ Contents:**
1 +**~ Table of Contents:**
2 2  
3 3  {{toc/}}
4 4  
5 5  
6 +
6 6  = 1. OTAA Join Process Debug =
7 7  
9 +
8 8  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.
9 9  \\**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:**
10 10  
... ... @@ -19,7 +19,7 @@
19 19  * If the device is sending join request to server?
20 20  * What frequency the device is sending?
21 21  
22 -[[image:https://wiki.dragino.com/images/thumb/0/0f/OTAA_Join-1.jpg/600px-OTAA_Join-1.jpg||height="316" width="600"]]
24 +[[image:image-20220526164956-15.png]]
23 23  
24 24  Console Output from End device to see the transmit frequency
25 25  
... ... @@ -29,7 +29,7 @@
29 29  * If the gateway receive the Join request packet from sensor? (If this fail, check if the gateway and sensor works on the match frequency)
30 30  * If the gateway gets the Join Accept message from server and transmit it via LoRa?
31 31  
32 -[[image:https://wiki.dragino.com/images/thumb/1/1c/OTAA_Join-2.png/600px-OTAA_Join-2.png||height="325" width="600"]]
34 +[[image:image-20220526163608-2.png]]
33 33  
34 34  Console Output from Gateway to see packets between end node and server.
35 35  
... ... @@ -40,7 +40,7 @@
40 40  * If the server send back a Join Accept for the Join Request? if not, check if the keys from the device match the keys you put in the server, or try to choose a different server route for this end device.
41 41  * If the Join Accept message are in correct frequency? If you set the server to use US915 band, and your end node and gateway is EU868, you will see the Join Accept message are in US915 band so no possible to Join success.
42 42  
43 -[[image:https://wiki.dragino.com/images/thumb/5/5c/OTAA_Join-3.png/600px-OTAA_Join-3.png||height="301" width="600"]]
45 +[[image:image-20220526163633-3.png]]
44 44  
45 45  The Traffic for the End node in the server, use TTN as example
46 46  
... ... @@ -49,11 +49,11 @@
49 49  
50 50  * If this data page shows the Join Request message from the end node? If not, most properly you have wrong settings in the keys. Keys in the server doesn't match the keys in End Node.
51 51  
52 -[[image:https://wiki.dragino.com/images/thumb/e/ec/OTAA_Join-4.png/600px-OTAA_Join-4.png||height="181" width="600"]]
54 +[[image:image-20220526163704-4.png]]
53 53  
54 54  The data for the end device set in server
55 55  
56 -[[image:https://wiki.dragino.com/images/thumb/b/b1/OTAA_Join-5.png/600px-OTAA_Join-5.png||height="166" width="600"]]
58 +[[image:image-20220526163732-5.png]]
57 57  
58 58  Check if OTAA Keys match the keys in device
59 59  
... ... @@ -60,6 +60,7 @@
60 60  
61 61  = 2. Notice of US915/CN470/AU915 Frequency band =
62 62  
65 +
63 63  (((
64 64  If user has problem to work with lorawan server in band US915/AU915/CN470, he can check:
65 65  )))
... ... @@ -94,18 +94,21 @@
94 94  Here are the freuqency tables for these bands as reference:
95 95  )))
96 96  
97 -[[image:https://wiki.dragino.com/images/thumb/3/3f/US915_FRE_BAND-1.png/600px-US915_FRE_BAND-1.png||height="170" width="600"]]
100 +[[image:image-20220526163801-6.png]]
98 98  
99 99  US915 Channels
100 100  
101 -[[image:https://wiki.dragino.com/images/thumb/8/8a/AU915_FRE_BAND-1.png/600px-AU915_FRE_BAND-1.png||height="167" width="600"]]
104 +[[image:image-20220526163926-7.png]]
102 102  
103 103  AU915 Channels
104 104  
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  
109 +[[image:image-20220526163941-8.png]]
110 +
107 107  (((
108 108  CN470 Channels
113 +
114 +
109 109  )))
110 110  
111 111  (((
... ... @@ -112,10 +112,12 @@
112 112  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.
113 113  )))
114 114  
115 -[[image:https://wiki.dragino.com/images/thumb/9/9a/US915_FRE_BAND-2.png/600px-US915_FRE_BAND-2.png||height="288" width="600"]]
121 +[[image:image-20220526164052-9.png]]
116 116  
117 117  (((
118 118  TTN FREQUENCY PLAN
125 +
126 +
119 119  )))
120 120  
121 121  (((
... ... @@ -125,6 +125,7 @@
125 125  
126 126  = 3. Why i see data lost/unperiocially uplink data? Even the signal strength is good =
127 127  
136 +
128 128  In this case, we can check if the frequency band matches in End Node, Gateway and LoRaWAN server. A typical case is using US915 in ChirpStack server as below:
129 129  
130 130  * **End node** ~-~-> Use Sub-band2 (Channel 8,9,10,11,12,13,14,15) for Dragino Sensor. ADR is also enable, this is the default settings for dragino sensors.
... ... @@ -146,6 +146,7 @@
146 146  
147 147  = 4. Transmision on ABP Mode =
148 148  
158 +
149 149  (((
150 150  In ABP mode, there is a Frame Counter Checks. With this check enabled, the server will only accept the frame with a higher counter. If you reboot the device in ABP mode, the device will start from count 0, so you won't be able to see the frame update in server.
151 151  )))
... ... @@ -166,7 +166,7 @@
166 166  To solve this, disable the Frame Counter Check will solve this issue , or reset the frame counter in the device page.
167 167  )))
168 168  
169 -[[~[~[image:https://wiki.dragino.com/images/thumb/1/19/ABP_Issue-1.jpg/600px-ABP_Issue-1.jpg~|~|height="340" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:ABP_Issue-1.jpg]]
179 +[[image:image-20220526164508-10.png]]
170 170  
171 171  Disable Frame Counter Check in ABP Mode
172 172  
... ... @@ -175,6 +175,7 @@
175 175  
176 176  == 5.1 How it work ==
177 177  
188 +
178 178  LoRaWAN End node will open two receive windows to receive the downstream data. If the downstream packets arrive the end node at these receive windows, the end node will be able to get this packet and process it.
179 179  
180 180  (((
... ... @@ -181,10 +181,11 @@
181 181  Depends on Class A or Class C, the receive windows will be a little difference,
182 182  )))
183 183  
184 -[[image:https://wiki.dragino.com/images/thumb/1/1a/Downstream_LoRaWAN-1.png/600px-Downstream_LoRaWAN-1.png||height="590" width="600"]]
195 +[[image:image-20220531161828-1.png]]
185 185  
186 186  receive windows for Class A and Class C
187 187  
199 +
188 188  Below are the requirement for the End Device to receive the packets.
189 189  
190 190  * The End Device must open the receive windows: RX1 or RX2
... ... @@ -191,19 +191,28 @@
191 191  * The LoRaWAN server must send a downstream packet, and the gateway forward this downstream packet for this end node.
192 192  * This downstream packet must arrive to the end node while RX1 or RX2 is open.
193 193  * This packet must match the frequency of the RX1 or RX2 window.
194 -* 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.**
206 +* This packet must match the DataRate of RX1(RX1DR) or RX2 (RX2DR). (% style="color:red" %)**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.**
195 195  
196 196  == 5.2 See Debug Info ==
197 197  
198 -**For LoRaWAN Server**
199 199  
211 +(((
212 +(% style="color:blue" %)**For LoRaWAN Server**
213 +)))
214 +
215 +(((
200 200  We can check if there is downlink message for this end node, use TTN for example:
217 +)))
201 201  
219 +(((
202 202  Configure a downstream to the end device
221 +)))
203 203  
204 -[[image:https://wiki.dragino.com/images/thumb/8/82/Downstream_debug_1.png/600px-Downstream_debug_1.png||height="217" width="600"]]
223 +[[image:image-20220526164623-12.png]]
205 205  
225 +(((
206 206  Set a downstream in TTN and see it is sent
227 +)))
207 207  
208 208  
209 209  (((
... ... @@ -210,126 +210,139 @@
210 210  This downstream info will then pass to the gateway downstream list. and include the DR which is used (SF9BW125) in EU868 is DR3
211 211  )))
212 212  
213 -[[image:https://wiki.dragino.com/images/thumb/d/dc/Downstream_debug_2.png/600px-Downstream_debug_2.png||height="245" width="600"]]
234 +[[image:image-20220526164650-13.png]]
214 214  
236 +(((
215 215  Gateway Traffic can see this downstream info
238 +)))
216 216  
217 217  
218 -**For LoRaWAN Gateway**
241 +(((
242 +(% style="color:blue" %)**For LoRaWAN Gateway**
243 +)))
219 219  
220 220  (((
221 221  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:
222 222  )))
223 223  
224 -[[image:https://wiki.dragino.com/images/thumb/2/21/Downstream_debug_3.png/600px-Downstream_debug_3.png||height="195" width="600"]]
249 +[[image:image-20220526164734-14.png]]
225 225  
251 +(((
226 226  Gateway Sent out this packet
253 +)))
227 227  
228 228  
229 -**For End Node**
230 -
231 -we can use AT Command (AT+CFG) to check the RX1 configure and RX2 configure. as below:
232 -
233 -(% class="box infomessage" %)
234 234  (((
235 - AT+RX2FQ=869525000 ~-~--> The RX2 Window frequency
257 +(% style="color:blue" %)**For End Node**
236 236  )))
237 237  
238 -(% class="box infomessage" %)
239 239  (((
240 - AT+RX2DR=3 ~-~--> The RX2 DataRate
261 +we can use AT Command (AT+CFG) to check the RX1 configure and RX2 configure. as below:
241 241  )))
242 242  
243 -(% class="box infomessage" %)
244 244  (((
245 - AT+RX1DL=1000 ~-~--> Receive Delay 1
265 +(% style="color:#037691" %)**AT+RX2FQ=869525000**  (%%) **~-~-->**  The RX2 Window frequency
266 +(% style="color:#037691" %)**AT+RX2DR=3**          (%%) **~-~-->**  The RX2 DataRate
267 +(% style="color:#037691" %)**AT+RX1DL=1000**       (%%) ** ~-~-->**  Receive Delay 1
268 +(% style="color:#037691" %)**AT+RX2DL=2000**       (%%) **~-~--> ** Receive Delay 2
269 +
270 +
246 246  )))
247 247  
248 -(% class="box infomessage" %)
249 249  (((
250 - AT+RX2DL=2000 ~-~--> Receive Delay 2
274 +(% style="color:blue" %)**when the device running, we can see below info:**
251 251  )))
252 252  
253 -when the device running, we can see below info:
277 +{{{ [12502]***** UpLinkCounter= 0 *****
278 + [12503]TX on freq 868500000 Hz at DR 0
279 + [13992]txDone
280 + [15022]RX on freq 868500000 Hz at DR 0 --> RX1 window open at frequency: 868500000, DR0, after 15022-13992= 1030ms of txdone
281 + [15222]rxTimeOut --> no packet arrive in RX1 window. (duration: 200ms)
282 + [15987]RX on freq 869525000 Hz at DR 3 --> RX2 window open at frequency: 869525000, DR3, after 15987-13992= 1995ms of txdone
283 + [16027]rxTimeOut --> no packet arrive in RX2 window. (duration: 40 ms)}}}
254 254  
255 -(% class="box" %)
256 256  (((
257 - [12502]~*~*~*~** UpLinkCounter= 0 ~*~*~*~**
258 - [12503]TX on freq 868500000 Hz at DR 0
259 - [13992]txDone
260 - [15022]RX on freq 868500000 Hz at DR 0     ~-~-> RX1 window open at frequency: 868500000, DR0, after 15022-13992= 1030ms of txdone
261 - [15222]rxTimeOut                           ~-~-> no packet arrive in RX1 window. (duration: 200ms)
262 - [15987]RX on freq 869525000 Hz at DR 3     ~-~-> RX2 window open at frequency: 869525000, DR3, after 15987-13992= 1995ms of txdone
263 - [16027]rxTimeOut                           ~-~-> no packet arrive in RX2 window. (duration: 40 ms)
286 +
264 264  )))
265 265  
266 -(% class="box" %)
267 267  (((
268 - Another message:
269 - [12502]~*~*~*~** UpLinkCounter= 0 ~*~*~*~**
270 - [12503]TX on freq 868100000 Hz at DR 0
271 - [13992]txDone
272 - [15022]RX on freq 868100000 Hz at DR 0
273 - [15222]rxTimeOut
274 - [15987]RX on freq 869525000 Hz at DR 3
275 - [16185]rxDone                              ~-~-> We have got the downstream packet.
276 - Rssi= -64
277 - Receive data
278 - 1:0012345678
290 +(% style="color:blue" %)**Another message:**
279 279  )))
280 280  
281 -== 5.3 If problem doesn’t solve ==
293 +{{{ [12502]***** UpLinkCounter= 0 *****
294 + [12503]TX on freq 868100000 Hz at DR 0
295 + [13992]txDone
296 + [15022]RX on freq 868100000 Hz at DR 0
297 + [15222]rxTimeOut
298 + [15987]RX on freq 869525000 Hz at DR 3
299 + [16185]rxDone --> We have got the downstream packet.
300 + Rssi= -64
301 + Receive data
302 + 1:0012345678}}}
282 282  
283 -**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:**
284 284  
305 +== 5.3 If problem doesn't solve ==
306 +
307 +
308 +(% style="color:red" %)**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:**
309 +
285 285  * End node console to show the transmit freuqency and DR.
286 286  * Gateway (from gateway UI) traffic to show the packet got from end node and receive from Server.
287 287  * Gateway traffic (from server UI) to shows the data exchange between gateway and server.
288 288  * End Node traffic (from server UI) to shows end node activity in server.
289 289  
315 +
316 +
290 290  = 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
291 291  
319 +
320 +(((
292 292  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.
322 +)))
293 293  
324 +(((
325 +
326 +)))
327 +
328 +(((
294 294  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:
330 +)))
295 295  
296 -{{{Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)
297 -}}}
332 +{{{Sat Nov 21 08:04:17 2020 daemon.info lora_pkt_fwd[1680]: ERROR~ Packet REJECTED, unsupported frequency - 923200000 (min:865000000,max:867000000)}}}
298 298  
334 +(((
335 +
336 +)))
337 +
338 +(((
299 299  In this case, please double check the gateway frequency and the server frequency band.
340 +)))
300 300  
301 301  
302 302  = 7. Decrypt a LoRaWAN Packet =
303 303  
304 -~1. LHT65 End device configure:
305 305  
306 -(% class="box infomessage" %)
307 -(((
308 -Change to ABP Mode: AT+NJM=0
309 -)))
346 +(% style="color:blue" %)**1. LHT65 End device configure:**
310 310  
311 -(% class="box infomessage" %)
312 -(((
313 -Change to fix frequency: AT+CHS=904900000
314 -)))
348 +**Change to ABP Mode:  AT+NJM=0**
349 +**Change to fix frequency:  AT+CHS=904900000**
350 +**Change to fix DR:  AT+DR=0**
315 315  
316 -(% class="box infomessage" %)
317 -(((
318 -Change to fix DR: AT+DR=0
319 -)))
352 +[[image:image-20220526165525-16.png]]
320 320  
321 -[[image:https://wiki.dragino.com/images/e/e6/Decrypt_a_LoRaWAN_Packet1.jpg||alt="Decrypt a LoRaWAN Packet1.jpg" height="607" width="558"]]
322 322  
323 -2. In LG02 , configure to receive above message
355 +(% style="color:blue" %)**2. In LG02 , configure to receive above message**
324 324  
325 -[[image:https://wiki.dragino.com/images/c/c3/Decrypt_a_LoRaWAN_Packet2.jpg||alt="Decrypt a LoRaWAN Packet2.jpg" height="337" width="558"]]
357 +[[image:image-20220526165612-17.png]]
326 326  
359 +
327 327  In LG02 console, we can see the hex receive are:
328 328  
329 -[[image:https://wiki.dragino.com/images/f/f1/Decrypt_a_LoRaWAN_Packet3.jpg||alt="Decrypt a LoRaWAN Packet3.jpg" height="179" width="558"]]
362 +[[image:image-20220526171112-21.png]]
330 330  
331 -3. Decode the info in web
332 332  
365 +(% style="color:blue" %)**3. Decode the info in web**
366 +
333 333  [[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
334 334  
335 335  Need these three fields:
... ... @@ -342,9 +342,11 @@
342 342  
343 343  [[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]]
344 344  
345 -[[image:https://wiki.dragino.com/images/7/77/Decrypt_a_LoRaWAN_Packet4.png||alt="Decrypt a LoRaWAN Packet4.png" height="390" width="558"]]
379 +[[image:image-20220526171029-20.png]]
346 346  
347 -The FRMPayload is the device payload.
381 +(((
382 + The FRMPayload is the device payload.
383 +)))
348 348  
349 349  
350 350  = 8. Why i see uplink 0x00 periodcally on the LHT65 v1.8 firmware =
... ... @@ -351,34 +351,121 @@
351 351  
352 352  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.
353 353  
390 +
354 354  = 9. Why do I see a "MIC Mismatch" error message from the server? =
355 355  
393 +(((
356 356  1)If the user receives a "MIC Mismatch" message after registering the node on the server.
395 +)))
357 357  
397 +(((
358 358  It is likely that the user filled in the wrong APPKEY when registering the node. Many users fill in "APPSKEY".
399 +)))
359 359  
360 -* Please note the distinction between "APPKEY" and "APPSKEY".
401 +* (((
402 +Please note the distinction between "APPKEY" and "APPSKEY".
403 +)))
361 361  
405 +(((
362 362  2）If the node works on the server for a period of time, the device stops working and receives a "MIC Mismatch" message.
407 +)))
363 363  
409 +(((
364 364  The user needs a USB-TTL adapter to connect the serial port to modify the node APPKEY.
411 +)))
365 365  
366 -* If a node is registered with multiple servers, it may also cause the "mic mismatch" error.
413 +* (((
414 +If a node is registered with multiple servers, it may also cause the "mic mismatch" error.
367 367  
416 +
417 +)))
418 +
368 368  = 10. Why i got the payload only with "0x00" or "AA~=~="? =
369 369  
370 370  * If you are using US915, AU915 and AS923 frequencies.This is normal phenomenon.
371 371  
423 +(((
372 372  When using the frequency mentioned above, the server sometimes adjusts the rate of the node, because the node defaults to the adaptive rate.
425 +)))
373 373  
374 -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,
427 +(((
428 +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,and the node will reply to the server after receiving the ADR packet, but the number of payload bytes exceeds the limit,so it will send a normal uplink packet, and an additional 00 data packet.
429 +)))
375 375  
376 -and the node will reply to the server after receiving the ADR packet, but the number of payload bytes exceeds the limit,
431 +* (((
432 +Solution: Use the decoder to filter out this 00 packet.
433 +)))
434 +* (((
435 +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]]
377 377  
378 -so it will send a normal uplink packet, and an additional 00 data packet.
437 +
438 +)))
379 379  
380 -* Solution: Use the decoder to filter out this 00 packet.
381 -* 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
440 += 11. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
382 382  
383 -(% class="wikigeneratedid" id="H" %)
442 +(((
443 +It is possible the keys is erased during upgrading of firmware. and the console output shows below after AT+CFG
444 +)))
445 +
446 +(((
447 +AT+APPKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
448 +)))
449 +
450 +(((
451 +AT+NWKSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
452 +)))
453 +
454 +(((
455 +AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
456 +)))
457 +
458 +(((
459 +AT+APPEUI=00 00 00 00 00 00 00 00
460 +)))
461 +
462 +(((
384 384  
464 +)))
465 +
466 +(((
467 +You can get the keys from the box sticker or send mail to Dragino Support to check keys with the provided SN number.
468 +)))
469 +
470 +(((
471 +You can rewrites the keys by running commands in AT Console
472 +)))
473 +
474 +(((
475 +**For example：**
476 +)))
477 +
478 +(((
479 +AT+APPKEY=85 41 47 20 45 58 28 14 16 82 A0 F0 80 0D DD EE
480 +)))
481 +
482 +(((
483 +AT+NWKSKEY=AA CC B0 20 30 45 37 32 14 1E 14 93 E2 3B 20 11
484 +)))
485 +
486 +(((
487 +AT+APPSKEY=11 23 02 20 30 20 30 60 80 20 20 30 30 20 10 10
488 +)))
489 +
490 +(((
491 +AT+APPEUI=2C 45 47 E3 24 12 23 24
492 +)))
493 +
494 +(((
495 +(Any combination of 16 bit codes can be used）
496 +
497 +
498 += 12. I set my device is LoRaWAN Class C mode, why i still see Class A after boot? =
499 +)))
500 +
501 +
502 +Class C only refers to status after OTAA Join successfully. The OTAA Join Process will use Class A mode.
503 +
504 +
505 +
506 +(% class="wikigeneratedid" %)
507 +
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