Changes for page RS485-LN – RS485 to LoRaWAN Converter User Manual
Last modified by Bei Jinggeng on 2025/01/10 15:06
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... ... @@ -1816,12 +1816,36 @@ 1816 1816 Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]] 1817 1817 1818 1818 1819 -== 7.2 Why Ican't join TTN V3 in US915 /AU915 bands? ==1819 +== 7.2 Why customers can't join TTN V3 in US915 /AU915 bands? == 1820 1820 1821 1821 1822 1822 It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]] 1823 1823 1824 1824 1825 +== 7.3 Why can't customers see the device's data in the server when the data is too long? == 1826 + 1827 +This is due to the limitation of the lorawan protocol, and the fixed DR needs to be adjusted to improve this problem. 1828 + 1829 +Please refer to the following link for the number of bytes limited by different frequencies and different DRs in the lorawan protocol 1830 + 1831 +[[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]] 1832 + 1833 +Example: 1834 + 1835 +[[image:image-20240620145456-1.png]] 1836 + 1837 +Please refer to the following command to fix DR 1838 + 1839 +AT+ADR=0 1840 + 1841 +AT+DR=3 1842 + 1843 +Downlink command: 1844 + 1845 +[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate]] 1846 + 1847 + 1848 + 1825 1825 = 8. Order Info = 1826 1826 1827 1827
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