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Last modified by Xiaoling on 2025/05/05 08:51
From version 102.1
edited by Xiaoling
on 2025/05/05 08:51
Change comment: There is no comment for this version
To version 98.1
edited by Bei Jinggeng
on 2025/04/29 12:00
Change comment: Uploaded new attachment "image-20250429120030-6.png", version {1}

Summary

Details

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Author
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1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
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63 63  
64 64  The data for the end device set in server
65 65  
66 +
66 66  [[image:image-20240129142631-4.png||height="637" width="1256"]]
67 67  
68 68  Check if OTAA Keys match the keys in device.
... ... @@ -162,205 +162,10 @@
162 162  )))
163 163  
164 164  
165 -= 4. Why i see packet lost =
166 += 4. Transmision on ABP Mode =
166 166  
167 -== **1. Signal problem** ==
168 168  
169 -
170 -(% style="color:blue" %)**1)**(%%)  (% style="color:blue" %)**ADR automatic adjustment** (%%)
171 -
172 -**Reason:**
173 -
174 -When the signal is at a critical value, the server may configure the node to adjust to a lower power DR.
175 -At this time, the server is at risk of losing uplink.
176 -
177 -
178 -**Solution:**
179 -
180 -Users can manually fix the DR value.
181 -
182 -
183 -(% style="color:red" %)
184 -**Notice:**
185 -
186 -* User need to set Adaptive Data Rate(ADR)=0 first. otherwise device will respond to server's ADR command and change the DR according to server auto-adjustment.
187 -
188 -* Data Rate specifies Spreading Factor. The mapping varies in different frequency bands. User can check this link for detail. [[rp2-1.0.3-lorawan-regional-parameters.pdf>>https://lora-alliance.org/resource_hub/rp2-1-0-3-lorawan-regional-parameters/]]
189 -
190 -(% style="color:blue" %)**AT Command: AT+DR**
191 -
192 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:409px" %)
193 -|(% style="background-color:#4f81bd; color:white; width:156px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:147px" %)**Function**|(% style="background-color:#4f81bd; color:white; width:100px" %)**Response**
194 -|(% style="width:156px" %)AT+DR=?|(% style="width:147px" %)Get the Data Rate.|(% style="width:100px" %)5(((
195 -OK
196 -)))
197 -|(% style="width:156px" %)AT+DR=2|(% style="width:147px" %)Set the Data Rate.|(% style="width:100px" %)OK(((
198 -
199 -)))
200 -
201 -(% style="color:blue" %)**Downlink Command: 0x2200aaFF**
202 -
203 -If the downlink payload=220001FF, it means setting the data rate to 1, while type code is 22 00 aa FF.
204 -
205 -* **Example 1**: Downlink Payload: **220001FF**  ~/~/ Set AT+DR=1.
206 -
207 -* **Example 2**: Downlink Payload: **220000FF**  ~/~/ Set AT+DR=0.
208 -
209 -(% style="display:none" %) (%%)
210 -
211 -
212 -(% style="color:blue" %)**2)**(%%)  (% style="color:blue" %)**Node antenna problem**
213 -
214 -**Reason:**
215 -
216 -Node antenna is loose
217 -
218 -
219 -**Solution:**
220 -
221 -Please check whether the antenna interface and module interface are detached
222 -
223 -[[image:image-20250429114526-1.png||height="429" width="303"]]
224 -
225 -
226 -
227 -(% style="color:blue" %)**3) **(%%) (% style="color:blue" %)**Gateway antenna problem**
228 -
229 -**Reason:**
230 -Gateway uses antenna with wrong frequency band
231 -
232 -For example: 868-band gateway uses antenna with 915-band, which will cause the signal to be greatly reduced
233 -
234 -
235 -**Solution:**
236 -
237 -Please check whether the silk screen on the antenna conflicts with the frequency you set.
238 -
239 -[[image:image-20250429115124-2.png]][[image:image-20250429115159-3.png||height="550" width="224"]]
240 -
241 -
242 -(% style="color:blue" %)**4) **(%%) (% style="color:blue" %)**Gateway module problem**
243 -
244 -**Reason:**
245 -
246 -Gateway uses module with wrong frequency band
247 -For example: 868-band gateway uses module with 915-band, which will cause the signal to be greatly reduced
248 -
249 -
250 -**Solution:**
251 -
252 -Please check whether the silkscreen of the module conflicts with the frequency you set.
253 -
254 -[[image:image-20250429115951-5.png||height="288" width="384"]][[image:image-20250429133640-7.png||height="284" width="378"]]
255 -
256 -
257 -== **2. Frequency point problem** ==
258 -
259 -
260 -**Reason:**
261 -
262 -There are multiple frequency configurations in AS923/US915/AU915/CN470.
263 -
264 -The frequency point of the gateway or server is wrong or missing.
265 -
266 -
267 -**Solution:**
268 -
269 -Users need to check whether the server or gateway configuration is missing or has an incorrect frequency.
270 -
271 -The frequency range used in the dragino node is as follows
272 -
273 -
274 -== **3. Frequency band problem** ==
275 -
276 -
277 -**Reason:**
278 -
279 -When there are multiple gateways, the node cannot lock the frequency band.
280 -
281 -
282 -**Solution:**
283 -
284 284  (((
285 -By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
286 -)))
287 -
288 -(((
289 -You can configure the end node to work in 8 channel mode by using the AT+CHE command. The 500kHz channels are always included for OTAA.
290 -)))
291 -
292 -(((
293 -
294 -)))
295 -
296 -(((
297 -For example, in (% style="color:blue" %)**US915**(%%) band, the frequency table is as below. By default, the end node will use all channels (0~~71) for OTAA Join process. After the OTAA Join, the end node will use these all channels (0~~71) to send uplink packets.
298 -)))
299 -
300 -[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220627160940-13.png?rev=1.1||alt="image-20220627160940-13.png"]]
301 -
302 -
303 -(((
304 -When you use the TTN V3 network, the US915 frequency bands use are:
305 -)))
306 -
307 -* (((
308 -903.9 - SF7BW125 to SF10BW125
309 -)))
310 -* (((
311 -904.1 - SF7BW125 to SF10BW125
312 -)))
313 -* (((
314 -904.3 - SF7BW125 to SF10BW125
315 -)))
316 -* (((
317 -904.5 - SF7BW125 to SF10BW125
318 -)))
319 -* (((
320 -904.7 - SF7BW125 to SF10BW125
321 -)))
322 -* (((
323 -904.9 - SF7BW125 to SF10BW125
324 -)))
325 -* (((
326 -905.1 - SF7BW125 to SF10BW125
327 -)))
328 -* (((
329 -905.3 - SF7BW125 to SF10BW125
330 -)))
331 -* (((
332 -904.6 - SF8BW500
333 -)))
334 -
335 -(((
336 -Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to Join the TTN V3 network and uplink data. To solve this issue, you can access the device via the AT commands and run:
337 -)))
338 -
339 -(((
340 -(% style="color:blue" %)**AT+CHE=2**
341 -)))
342 -
343 -(((
344 -(% style="color:blue" %)**ATZ**
345 -)))
346 -
347 -
348 -(((
349 -to set the end node to work in 8 channel mode. The device will work in Channel 8-15 & 64-71 for OTAA, and channel 8-15 for Uplink.
350 -)))
351 -
352 -(((
353 -The (% style="color:blue" %)**AU915**(%%) band is similar. Below are the AU915 Uplink Channels.
354 -
355 -[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220627161124-14.png?rev=1.1||alt="image-20220627161124-14.png"]]
356 -
357 -
358 -)))
359 -
360 -= 5. Transmision on ABP Mode =
361 -
362 -
363 -(((
364 364  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.
365 365  )))
366 366  
... ... @@ -379,9 +379,9 @@
379 379  Disable Frame Counter Check in ABP Mode
380 380  
381 381  
382 -= 6. Downstream Debug =
188 += 5. Downstream Debug =
383 383  
384 -== 6.1 How it work ==
190 +== 5.1 How it work ==
385 385  
386 386  
387 387  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.
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392 392  * **Class A** : Suitable for Battery powered end node. Class A will save a lot of power but it can only receive downlink after each uplink
393 393  * **Class C**: End node can receive downlink immediately but have higher power consumption.
394 394  
201 +
395 395  
396 396  )))
397 397  
... ... @@ -412,7 +412,7 @@
412 412  
413 413  * 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.**
414 414  
415 -== 6.2 See Debug Info ==
222 +== 5.2 See Debug Info ==
416 416  
417 417  
418 418  (((
... ... @@ -517,7 +517,7 @@
517 517   1:0012345678}}}
518 518  
519 519  
520 -== 6.3 If problem doesn't solve ==
327 +== 5.3 If problem doesn't solve ==
521 521  
522 522  
523 523  (% 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:**
... ... @@ -530,7 +530,7 @@
530 530  
531 531  * End Node traffic (from server UI) to shows end node activity in server.
532 532  
533 -= 7. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
340 += 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
534 534  
535 535  
536 536  (((
... ... @@ -556,7 +556,7 @@
556 556  )))
557 557  
558 558  
559 -= 8. Decrypt a LoRaWAN Packet =
366 += 7. Decrypt a LoRaWAN Packet =
560 560  
561 561  
562 562  (% style="color:blue" %)**1. LHT65N End device configure:**
... ... @@ -571,6 +571,7 @@
571 571  [[image:image-20240129170603-7.png||height="697" width="545"]][[image:image-20240129163741-3.png||height="694" width="565"]]
572 572  
573 573  
381 +
574 574  **Configuration: **
575 575  
576 576  [[image:image-20240129164219-4.png||height="612" width="440"]]
... ... @@ -587,6 +587,7 @@
587 587  [[image:image-20240129170137-6.png||height="459" width="1116"]]
588 588  
589 589  
398 +
590 590  (% style="color:blue" %)**3. Decode the info in CMD(Command prompt window)**
591 591  
592 592  LoRa packet Base64 format:  QP~/~/~/~/+AFQACZv8Hjmc8gFTAkhMzU+75 **(from LPS8-v2)**
... ... @@ -610,18 +610,27 @@
610 610  
611 611  **Step3: Parse the gateway raw payload.(./node_modules/.bin/lora-packet-decode ~-~-base64 QP~/~/~/~/+AFQACZv8Hjmc8gFTAkhMzU+75)**
612 612  
422 +
423 +
424 +
613 613  [[image:image-20240129192908-24.png||height="477" width="907"]]
614 614  
427 +
615 615  [[image:image-20240129192954-25.png||height="485" width="916"]]
616 616  
617 617  
618 -= 9. Why I see uplink 0x00 periodically on the LHT65 v1.8 firmware =
619 619  
620 620  
433 +
434 +
435 +
436 += 8. Why I see uplink 0x00 periodically on the LHT65 v1.8 firmware =
437 +
438 +
621 621  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.
622 622  
623 623  
624 -= 10. Why do I see a "MIC Mismatch" error message from the server? =
442 += 9. Why do I see a "MIC Mismatch" error message from the server? =
625 625  
626 626  
627 627  (((
... ... @@ -659,7 +659,7 @@
659 659  4）We have had cases where it was automatically fixed the next day despite no manual changes, probably a server side issue
660 660  
661 661  
662 -= 11. Why I got the payload only with "0x00" or "AA~=~="? =
480 += 10. Why I got the payload only with "0x00" or "AA~=~="? =
663 663  
664 664  
665 665  (% style="color:blue" %)**Why sensor sends 0x00?**
... ... @@ -693,7 +693,7 @@
693 693  Some node decoders may not have the filter function, or you need decoders of other servers and formats. Please send an email to [[support@dragino.com>>mailto:support@dragino.com]]
694 694  
695 695  
696 -= 12. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
514 += 11. Why my Dev EUI and APP EUI is 0x000000000000, how to solve? =
697 697  
698 698  
699 699  (((
... ... @@ -754,7 +754,7 @@
754 754  (Any combination of 16 bit codes can be used）
755 755  
756 756  
757 -= 13. I set my device is LoRaWAN Class C mode, why I still see Class A after boot? =
575 += 12. I set my device is LoRaWAN Class C mode, why I still see Class A after boot? =
758 758  )))
759 759  
760 760  
... ... @@ -761,7 +761,7 @@
761 761  Class C only refers to status after OTAA Join successfully. The OTAA Join Process will use Class A mode.
762 762  
763 763  
764 -= 14. Why it takes longer time for OTAA joined in US915/CN470/AU915 band? =
582 += 13. Why it takes longer time for OTAA joined in US915/CN470/AU915 band? =
765 765  
766 766  
767 767  In US915, AU915 or CN470 frequency band, there are 8 sub-bands, totally 72 channels. and LoRaWAN server normally use only one sub-band, for example Sub-band 2 in TTN. The gateway also configured to Sub-band 2 and cover eight channels in this sub-band. If the end node transfer data in Sub-band 2, it will reach to gateway and to the LoRaWAN server. If the end node transfer packets in other sub-bands, for example sub-band 1, the packet won't arrive both gateway or LoRaWAN server.
image-20250429133640-7.png
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1 -XWiki.Bei
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