Last modified by Edwin Chen on 2025/01/29 20:30
<
From version < 29.1 >
edited by Xiaoling
on 2022/05/26 17:11
To version < 32.3 >
edited by Xiaoling
on 2022/07/13 14:59
>
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1 -**~ Contents:**
1 +**~ Table of Contents:**
2 2  
3 -(((
4 -
5 -)))
6 -
7 7  {{toc/}}
8 8  
9 9  
6 +
10 10  = 1. OTAA Join Process Debug =
11 11  
9 +
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.
13 13  \\**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:**
14 14  
... ... @@ -64,6 +64,7 @@
64 64  
65 65  = 2. Notice of US915/CN470/AU915 Frequency band =
66 66  
65 +
67 67  (((
68 68  If user has problem to work with lorawan server in band US915/AU915/CN470, he can check:
69 69  )))
... ... @@ -106,10 +106,13 @@
106 106  
107 107  AU915 Channels
108 108  
108 +
109 109  [[image:image-20220526163941-8.png]]
110 110  
111 111  (((
112 112  CN470 Channels
113 +
114 +
113 113  )))
114 114  
115 115  (((
... ... @@ -120,6 +120,8 @@
120 120  
121 121  (((
122 122  TTN FREQUENCY PLAN
125 +
126 +
123 123  )))
124 124  
125 125  (((
... ... @@ -129,6 +129,7 @@
129 129  
130 130  = 3. Why i see data lost/unperiocially uplink data? Even the signal strength is good =
131 131  
136 +
132 132  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:
133 133  
134 134  * **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.
... ... @@ -150,6 +150,7 @@
150 150  
151 151  = 4. Transmision on ABP Mode =
152 152  
158 +
153 153  (((
154 154  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.
155 155  )))
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179 179  
180 180  == 5.1 How it work ==
181 181  
188 +
182 182  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.
183 183  
184 184  (((
... ... @@ -185,10 +185,11 @@
185 185  Depends on Class A or Class C, the receive windows will be a little difference,
186 186  )))
187 187  
188 -[[image:image-20220526164547-11.png]]
195 +[[image:image-20220531161828-1.png]]
189 189  
190 190  receive windows for Class A and Class C
191 191  
199 +
192 192  Below are the requirement for the End Device to receive the packets.
193 193  
194 194  * The End Device must open the receive windows: RX1 or RX2
... ... @@ -195,12 +195,14 @@
195 195  * The LoRaWAN server must send a downstream packet, and the gateway forward this downstream packet for this end node.
196 196  * This downstream packet must arrive to the end node while RX1 or RX2 is open.
197 197  * This packet must match the frequency of the RX1 or RX2 window.
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.**
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.**
199 199  
208 +
200 200  == 5.2 See Debug Info ==
201 201  
211 +
202 202  (((
203 -**For LoRaWAN Server**
213 +(% style="color:blue" %)**For LoRaWAN Server**
204 204  )))
205 205  
206 206  (((
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230 230  
231 231  
232 232  (((
233 -**For LoRaWAN Gateway**
243 +(% style="color:blue" %)**For LoRaWAN Gateway**
234 234  )))
235 235  
236 236  (((
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245 245  
246 246  
247 247  (((
248 -**For End Node**
258 +(% style="color:blue" %)**For End Node**
249 249  )))
250 250  
251 251  (((
... ... @@ -267,7 +267,7 @@
267 267  )))
268 268  
269 269  (((
270 -**when the device running, we can see below info:**
280 +(% style="color:blue" %)**when the device running, we can see below info:**
271 271  )))
272 272  
273 273  {{{ [12502]***** UpLinkCounter= 0 *****
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283 283  )))
284 284  
285 285  (((
286 -**Another message:**
296 +(% style="color:blue" %)**Another message:**
287 287  )))
288 288  
289 289  {{{ [12502]***** UpLinkCounter= 0 *****
... ... @@ -338,29 +338,24 @@
338 338  
339 339  (% class="box infomessage" %)
340 340  (((
341 -Change to ABP Mode: AT+NJM=0
351 +**Change to ABP Mode: AT+NJM=0**
352 +**Change to fix frequency: AT+CHS=904900000**
353 +**Change to fix DR: AT+DR=0**
342 342  )))
343 343  
344 -(% class="box infomessage" %)
345 -(((
346 -Change to fix frequency: AT+CHS=904900000
347 -)))
356 +[[image:image-20220526165525-16.png]]
348 348  
349 -(% class="box infomessage" %)
350 -(((
351 -Change to fix DR: AT+DR=0
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 -
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"]]
361 +[[image:image-20220526165612-17.png]]
359 359  
363 +
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"]]
366 +[[image:image-20220526171112-21.png]]
363 363  
368 +
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/]]
... ... @@ -375,7 +375,7 @@
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"]]
383 +[[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  
394 +
389 389  = 9. Why do I see a "MIC Mismatch" error message from the server? =
390 390  
391 391  (((
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432 432  * (((
433 433  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]]
434 434  
435 -
436 436  
437 437  )))
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）
467 467  
468 468  
502 += 12. I set my device is LoRaWAN Class C mode, why i still see Class A after boot? =
503 +)))
504 +
505 +
506 +Class C only refers to status after OTAA Join successfully. The OTAA Join Process will use Class A mode.
507 +
508 +
509 +
510 +(% class="wikigeneratedid" %)
511 +
image-20220531161828-1.png
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1 +XWiki.Xiaoling
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