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Last modified by Mengting Qiu on 2025/07/03 15:42
From version 100.1
edited by kai
on 2024/05/25 10:43
Change comment: There is no comment for this version
To version 101.1
edited by Bei Jinggeng
on 2024/07/29 17:48
Change comment: There is no comment for this version

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1 -XWiki.kai
1 +XWiki.Bei
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1382 1382  
1383 1383  == 7.3 How to change the LoRa Frequency Bands/Region? ==
1384 1384  
1385 -
1386 1386  You can follow the instructions for [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]].
1387 1387  When downloading the images, choose the required image file for download. ​
1388 1388  
1389 1389  
1389 +== 7.4 Why is the data uploaded to the LoRaWAN platform node empty and fProt~=0? ==
1390 +
1391 +This is due to The length of bytes sent by the node is limited by the lorawan protocol, and the fixed DR needs to be adjusted to improve this problem.
1392 +
1393 +Please refer to the following link for the number of bytes limited by different frequencies and different DRs in the lorawan protocol
1394 +
1395 +[[lora-alliance.org/wp-content/uploads/2021/05/RP002-1.0.3-FINAL-1.pdf>>url:https://lora-alliance.org/wp-content/uploads/2021/05/RP002-1.0.3-FINAL-1.pdf]]
1396 +
1397 +Example:
1398 +
1399 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/RS485-LN%20%E2%80%93%20RS485%20to%20LoRaWAN%20Converter/WebHome/image-20240620145456-1.png?rev=1.1||alt="image-20240620145456-1.png"]]
1400 +
1401 +Please refer to the following command to fix DR
1402 +
1403 +AT+ADR=0
1404 +
1405 +AT+DR=3
1406 +
1407 +Downlink command:
1408 +
1409 +[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate>>url:http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate]]
1410 +
1411 +(% class="wikigeneratedid" %)
1412 += =
1413 +
1390 1390  = 8. ​Order Info =
1391 1391  
1392 1392