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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... ... @@ -736,31 +736,21 @@ 736 736 ))) 737 737 738 738 ((( 739 -(% style="color:blue" %)**Example 2:** (%%) ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)739 +(% style="color:blue" %)**Example 2:** (%%) 740 740 ))) 741 741 742 742 ((( 743 - Userin IoTserver send a downlinkcommand: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**743 +Check TTL Sensor return: 744 744 ))) 745 745 746 746 ((( 747 - 748 -))) 749 - 750 750 ((( 751 -((( 752 -RS485-LN got this downlink command and send (% style="color:#4f81bd" %)**0A 08 00 04 00 01 **(%%)to Modbus network. One of the RS485 sensor in the network send back Modbus reply **0A 08 00 04 00 00**. RS485-LN get this reply and combine with the original downlink command and uplink. The uplink message is: **A8** (% style="color:#4f81bd" %)**0A 08 00 04 00 **(% style="color:red" %)**01 06** ** **(% style="color:green" %)**0A 08 00 04 00 00** 748 +[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/test/WebHome/1654132684752-193.png?rev=1.1||alt="1654132684752-193.png"]](% title="Click and drag to resize" %) 753 753 ))) 754 - 755 - 756 756 ))) 757 757 758 -((( 759 - (% aria-label="1654159460680-153.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654159460680-153.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 760 -))) 761 761 762 762 763 - 764 764 ==== (% style="color:blue" %)**Set Payload version**(%%) ==== 765 765 766 766 ... ... @@ -1694,7 +1694,7 @@ 1694 1694 1. Check if Modbus-MTU return back the expected result to RS485-LN. 1695 1695 1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output. 1696 1696 1697 -[[image:image-202 21130104310-1.png||height="380" width="680"]]1687 +[[image:image-20240816112950-1.png||height="382" width="731"]] 1698 1698 1699 1699 1700 1700 Example Connection: ... ... @@ -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? ==1809 +== 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 1815 +== 7.3 Why can't customers see the device's data in the server when the data is too long? == 1816 + 1817 +This is due to the limitation of the lorawan protocol, and the fixed DR needs to be adjusted to improve this problem. 1818 + 1819 +Please refer to the following link for the number of bytes limited by different frequencies and different DRs in the lorawan protocol 1820 + 1821 +[[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]] 1822 + 1823 +Example: 1824 + 1825 +[[image:image-20240620145456-1.png]] 1826 + 1827 +Please refer to the following command to fix DR 1828 + 1829 +AT+ADR=0 1830 + 1831 +AT+DR=3 1832 + 1833 +Downlink command: 1834 + 1835 +[[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]] 1836 + 1837 + 1838 + 1825 1825 = 8. Order Info = 1826 1826 1827 1827
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