Last modified by Edwin Chen on 2025/01/29 20:30
<
From version < 92.1
edited by Edwin Chen
on 2025/01/29 20:30
To version < 42.1 >
edited by Mengting Qiu
on 2024/01/23 15:07
Change comment: Uploaded new attachment "image-20240123150720-1.png", version {1}

Summary

Details

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Author
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1 -XWiki.Edwin
1 +XWiki.ting
Content
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4 4  
5 5  
6 6  
7 -= 1. Join process page check =
7 += 1.(% style="display:none" %) (%%) OTAA Join Process Debug =
8 8  
9 9  
10 10  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.
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26 26  
27 27  * What frequency the device is sending?
28 28  
29 -[[image:image-20240129142147-2.png||height="736" width="964"]]
29 +[[image:image-20220526164956-15.png||height="591" width="1153"]]
30 30  
31 -Console Output from End device to see the transmit frequency.
31 +Console Output from End device to see the transmit frequency
32 32  
33 33  
34 +
34 34  (% style="color:blue" %)**2. Gateway packet traffic in gateway web or ssh. we can check:**
35 35  
36 36  * If the gateway receive the Join request packet from sensor? (If this fail, check if the gateway and sensor works on the match frequency)
... ... @@ -37,36 +37,38 @@
37 37  
38 38  * If the gateway gets the Join Accept message from server and transmit it via LoRa?
39 39  
40 -[[image:image-20240129151608-6.jpeg||height="725" width="1256"]]
41 +[[image:image-20220526163608-2.png]]
41 41  
42 42  Console Output from Gateway to see packets between end node and server.
43 43  
44 44  
45 -(% style="color:blue" %)**3. Gateway Live data in LoRaWAN Server**
46 46  
47 -* Does the gateway real-time data contain information about Join Request? If not, check the internet connection and gateway LoRaWAN server Settings.
47 +(% style="color:blue" %)**3. Gateway Traffic Page in LoRaWAN Server**
48 48  
49 -* Does the server send back a Join Accept for the Join Request? If not, check that the key from the device matches the key you put into the server, or try to choose a different server route for that end device.
49 +* If the Join Request packet arrive the gateway traffic in server? If not, check the internet connection and gateway LoRaWAN server settings.
50 50  
51 +* 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.
52 +
51 51  * 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.
52 52  
53 -[[image:image-20240129150821-5.jpeg||height="522" width="1264"]]
55 +[[image:image-20220526163633-3.png]]
54 54  
55 -The Traffic for the End node in the server, use TTN as example.
57 +The Traffic for the End node in the server, use TTN as example
56 56  
57 57  
60 +
58 58  (% style="color:blue" %)**4. Data Page in LoRaWAN server**
59 59  
60 60  * 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.
61 61  
62 -[[image:image-20240129142557-3.png||height="488" width="1267"]]
65 +[[image:image-20220526163704-4.png]]
63 63  
64 64  The data for the end device set in server
65 65  
66 66  
67 -[[image:image-20240129142631-4.png||height="637" width="1256"]]
70 +[[image:image-20220526163732-5.png]]
68 68  
69 -Check if OTAA Keys match the keys in device.
72 +Check if OTAA Keys match the keys in device
70 70  
71 71  
72 72  = 2. Notice of US915/CN470/AU915 Frequency band =
... ... @@ -73,17 +73,17 @@
73 73  
74 74  
75 75  (((
76 -If user has problem to work with LoRaWAN server in band US915/AU915/CN470, he can check:
79 +If user has problem to work with lorawan server in band US915/AU915/CN470, he can check:
77 77  )))
78 78  
79 79  * (((
80 -What **sub-band** the server support?
83 +What **sub-band** the server support ?
81 81  )))
82 82  * (((
83 -What is the **sub-band** the gateway support?
86 +What is the **sub-band** the gateway support ?
84 84  )))
85 85  * (((
86 -What is the **sub-band** the end node is using?
89 +What is the **sub-band** the end node is using ?
87 87  )))
88 88  
89 89  (((
... ... @@ -95,7 +95,7 @@
95 95  )))
96 96  
97 97  (((
98 -In LoRaWAN protocol, the frequency bands US915, AU915, CN470 each includes at least 72 frequencies. Many gateways support only 8 or 16 frequencies, and server might support 8 frequency only. In this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies, because the end node will send data in many frequency that the gateway or server doesn't support.
101 +In LoRaWAN protocol, the frequency bands US915, AU915, CN470 each includes at least 72 frequencies. Many gateways support only 8 or 16 frequencies, and server might support 8 frequency only. In this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies, because the end node will send data in many frequency that the gateway or server doesn,t support.
99 99  )))
100 100  
101 101  (((
... ... @@ -103,7 +103,7 @@
103 103  )))
104 104  
105 105  (((
106 -Here are the frequency tables for these bands as reference:
109 +Here are the freuqency tables for these bands as reference:
107 107  )))
108 108  
109 109  [[image:image-20220526163801-6.png]]
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128 128  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.
129 129  )))
130 130  
131 -[[image:image-20240123151225-3.png||height="434" width="902"]]
134 +[[image:image-20220526164052-9.png]]
132 132  
133 133  (((
134 134  TTN FREQUENCY PLAN
... ... @@ -142,7 +142,7 @@
142 142  
143 143  (% style="display:none" %) (%%)
144 144  
145 -= 3. Why I see data lost/ is not periodically uplink？ Even the signal strength is good =
148 += 3. Why i see data lost/unperiocially uplink data? Even the signal strength is good =
146 146  
147 147  
148 148  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:
... ... @@ -176,11 +176,9 @@
176 176  
177 177  (((
178 178  To solve this, disable the Frame Counter Check will solve this issue , or reset the frame counter in the device page.
179 -
180 -[[image:image-20240123161737-4.png||height="395" width="763"]]
181 181  )))
182 182  
183 -[[image:image-20240123161853-6.png||height="599" width="771"]]
184 +[[image:image-20220526164508-10.png]]
184 184  
185 185  Disable Frame Counter Check in ABP Mode
186 186  
... ... @@ -193,13 +193,7 @@
193 193  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.
194 194  
195 195  (((
196 -Depends on Class A or Class C, the receive windows will be a little difference. The main difference between Class A and Class C:
197 -
198 -* **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
199 -* **Class C**: End node can receive downlink immediately but have higher power consumption.
200 -
201 -
202 -
197 +Depends on Class A or Class C, the receive windows will be a little difference,
203 203  )))
204 204  
205 205  [[image:image-20220531161828-1.png]]
... ... @@ -231,27 +231,24 @@
231 231  )))
232 232  
233 233  (((
234 -Configure a downlink to the end device
235 -
236 -[[image:image-20240129152412-8.png||height="486" width="1206"]]
229 +Configure a downstream to the end device
237 237  )))
238 238  
232 +[[image:image-20220526164623-12.png]]
239 239  
240 240  (((
241 241  Set a downstream in TTN and see it is sent
242 242  )))
243 243  
244 -(% style="color:red" %)**Note: After the downlink command is successfully sent from the platform to the node, the downlink command is executed only after the platform receives the next uplink package from the node.**
245 245  
246 -
247 247  (((
248 -This downlink info will then pass to the gateway downlink list. and the DR which is used (SF7BW500) in US915 is DR5.
240 +This downstream info will then pass to the gateway downstream list. and include the DR which is used (SF9BW125) in EU868 is DR3
249 249  )))
250 250  
251 -[[image:image-20240129152049-7.png||height="463" width="1166"]]
243 +[[image:image-20220526164650-13.png]]
252 252  
253 253  (((
254 -Gateway Traffic can see this downlink info
246 +Gateway Traffic can see this downstream info
255 255  )))
256 256  
257 257  
... ... @@ -261,10 +261,10 @@
261 261  )))
262 262  
263 263  (((
264 -When the downlink packet appear on the traffic of Gateway page. The LoRaWAN gateway can get it from LoRaWAN server and transmit it. In Dragino Gateway, this can be checked by running "logread -f" in the SSH console. and see below:
256 +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:
265 265  )))
266 266  
267 -[[image:image-20240129154321-9.png]]
259 +[[image:image-20220526164734-14.png]]
268 268  
269 269  (((
270 270  Gateway Sent out this packet
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341 341  
342 342  
343 343  (((
344 -In LoRaWAN, the gateway 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.
336 +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.
345 345  )))
346 346  
347 347  (((
... ... @@ -366,76 +366,55 @@
366 366  = 7. Decrypt a LoRaWAN Packet =
367 367  
368 368  
369 -(% style="color:blue" %)**1. LHT65N End device configure:**
361 +(% style="color:blue" %)**1. LHT65 End device configure:**
370 370  
371 371  **Change to ABP Mode:  AT+NJM=0**
372 372  
373 -**Change to fix frequency:  ​​​​AT+CHE=1**
365 +**Change to fix frequency:  AT+CHS=904900000**
374 374  
367 +**Change to fix DR:  AT+DR=0**
375 375  
376 -**AT+CFG(Print configuration):**
377 377  
378 -[[image:image-20240129170603-7.png||height="697" width="545"]][[image:image-20240129163741-3.png||height="694" width="565"]]
370 +[[image:image-20220526165525-16.png]]
379 379  
380 380  
381 381  
382 -**Configuration: **
374 +(% style="color:blue" %)**2. In LG02 , configure to receive above message**
383 383  
384 -[[image:image-20240129164219-4.png||height="612" width="440"]]
376 +[[image:image-20220526165612-17.png]]
385 385  
386 386  
379 +In LG02 console, we can see the hex receive are:
387 387  
388 -(% style="color:blue" %)**2. In LPS8-v2, configure to receive above message**
381 +[[image:image-20220526171112-21.png]]
389 389  
390 -[[image:image-20240129164326-5.png||height="506" width="1114"]]
391 391  
392 392  
393 -In LPS8-v2 console, we can see the Base64 receive are:
385 +(% style="color:blue" %)**3. Decode the info in web**
394 394  
395 -[[image:image-20240129170137-6.png||height="459" width="1116"]]
387 +[[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
396 396  
389 +Need these three fields:
397 397  
391 +LoRa packet hex format: 40c1190126800100024926272bf18bbb6341584e27e23245 (from LG02)
398 398  
399 -(% style="color:blue" %)**3. Decode the info in CMD(Command prompt window)**
393 +AT+NWKSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 11 (End node Network Session Key)
400 400  
401 -LoRa packet Base64 format:  QP~/~/~/~/+AFQACZv8Hjmc8gFTAkhMzU+75 **(from LPS8-v2)**
395 +AT+APPSKEY=00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 11 (End Node App Session Key)
402 402  
403 -Then the instructions and format parsed in SecureCRT are:  ./node_modules/.bin/lora-packet-decode ~-~-base64 QP~/~/~/~/+AFQACZv8Hjmc8gFTAkhMzU+75
404 404  
398 +[[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]]
405 405  
406 -**Step1: Open CMD, Enter the gateway IP and port.(ssh root@gateway IP -p 22)**
400 +[[image:image-20220526171029-20.png]]
407 407  
408 -[[image:image-20240129190752-17.png||height="338" width="901"]]
402 +(((
403 + The FRMPayload is the device payload.
404 +)))
409 409  
410 -[[image:image-20240129191937-21.png||height="450" width="901"]]
411 411  
407 += 8. Why i see uplink 0x00 periodcally on the LHT65 v1.8 firmware =
412 412  
413 -**Step2: Enter the command to download the LoRa parsing package.(npm install lora-packet)**
414 414  
415 -[[image:image-20240129192239-22.png||height="416" width="902"]]
416 -
417 -[[image:image-20240129192549-23.png||height="459" width="898"]]
418 -
419 -
420 -**Step3: Parse the gateway raw payload.(./node_modules/.bin/lora-packet-decode ~-~-base64 QP~/~/~/~/+AFQACZv8Hjmc8gFTAkhMzU+75)**
421 -
422 -
423 -
424 -
425 -[[image:image-20240129192908-24.png||height="477" width="907"]]
426 -
427 -
428 -[[image:image-20240129192954-25.png||height="485" width="916"]]
429 -
430 -
431 -
432 -
433 -
434 -
435 -
436 -= 8. Why I see uplink 0x00 periodically on the LHT65 v1.8 firmware =
437 -
438 -
439 439  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.
440 440  
441 441  
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477 477  4）We have had cases where it was automatically fixed the next day despite no manual changes, probably a server side issue
478 478  
479 479  
480 -= 10. Why I got the payload only with "0x00" or "AA~=~="? =
451 += 10. Why i got the payload only with "0x00" or "AA~=~="? =
481 481  
482 482  
483 483  (% style="color:blue" %)**Why sensor sends 0x00?**
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572 572  (Any combination of 16 bit codes can be used）
573 573  
574 574  
575 -= 12. I set my device is LoRaWAN Class C mode, why I still see Class A after boot? =
546 += 12. I set my device is LoRaWAN Class C mode, why i still see Class A after boot? =
576 576  )))
577 577  
578 578  
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582 582  = 13. Why it takes longer time for OTAA joined in US915/CN470/AU915 band? =
583 583  
584 584  
585 -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.
556 +In US915, AU915 or CN470 frequency band, there are 8 subbands, totally 72 channels. and LoRaWAN server normally use only one sub-band, for example Subband 2 in TTN. The gateway also configured to Subband 2 and cover eight channels in this subband. If the end node transfer data in Subband 2, it will reach to gateway and to the LoRaWAN server. If the end node transfer packets in other subbands, for example subband 1, the packet won't arrive both gateway or LoRaWAN server.
586 586  
587 587  
588 -In Dragino Sensors old version firmware (before early 2022), the sub-band is fixed the sub-band to 2 , but this cause a problem, the end node is hard to use in other subband and need program. So the new logic is as below:
559 +In Dragino Sensors old version firmware (before early 2022), the subband is fixed the subband to 2 , but this cause a problem, the end node is hard to use in other subband and need program. So the new logic is as below:
589 589  
590 -We have improved this, the end node will use frequency 1 from sub-band1, then frequency 1 from sub-band2, then frequency 1 from sub-band3, etc to process the OTAA join, in this case, in this case, the end node can support LoRaWAN servers with different sub-bands. To make sure the end node will only transmit the proper sub-band after OTAA Joined successfully, the end node will:
561 +We have improved this, the end node will use frequency 1 from sub-band1, then frequency 1 from sub-band2, then frequency 1 from sub-band3, etc to process the OTAA join, In this case, In this case, the end node can support LoRaWAN servers with different subbands. To make sure the end node will only transmit the proper sub-band after OTAA Joined successfully, the end node will:
591 591  
592 592  * (((
593 -Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band.
564 +Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that subband
594 594  )))
595 595  * (((
596 -Use the Join successful sub-band if the server doesn't include sub-band info in the OTAA Join Accept message (TTN v2 doesn't include).
567 +Use the Join successful sub-band if the server doesn't include subband info in the OTAA Join Accept message ( TTN v2 doesn't include)
597 597  )))
598 598  
599 -This change will make the activation time a little longer but make sure the device can be used in any sub-band.
570 +This change will make the activation time a littler longer but make sure the device can be used in any subband.
600 600  
601 601  
602 -Below is a photo to show why it takes longer time for OTAA Join. We can see in 72 channels mode, why it takes more time to join success. If users want to have faster OTAA Join success, he can change default CHE to the sub-band he uses.
573 +Below is a photo to show why it takes longer time for OTAA Join. We can see in 72 channels mode, why it takes more time to join success. If users want to have faster OTAA Join success, he can change default CHE to the subband he use.
603 603  
604 604  
605 605  [[image:image-20221215223215-1.png||height="584" width="1280"]]
577 +
578 +(% class="wikigeneratedid" %)
579 +
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