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1		-XWiki.Bei
	1	+XWiki.kai

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1382	1382
1383	1383	== 7.3 How to change the LoRa Frequency Bands/Region? ==
1384	1384
	1385	+
1385	1385	You can follow the instructions for [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]].
1386	1386	When downloading the images, choose the required image file for download. ​
1387	1387
1388	1388
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		-
1414	1414	= 8. ​Order Info =
1415	1415
1416	1416