Last modified by Karry Zhuang on 2025/03/06 16:34
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From version < 47.2 >
edited by Xiaoling
on 2022/06/02 17:18
To version < 49.2 >
edited by Xiaoling
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837 837  [[image:image-20220602171200-9.png]]
838 838  
839 839  
840 -Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.
840 +(% style="color:red" %)Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.
841 841  
842 842  
843 -==== ====
843 +== 3.7 Buttons ==
844 +
845 +
846 +(% border="1" style="background-color:#f7faff; width:500px" %)
847 +|=**Button**|=(% style="width: 1420px;" %)**Feature**
848 +|**ACT**|(% style="width:1420px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**
849 +|**RST**|(% style="width:1420px" %)Reboot RS485
850 +|**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>path:#upgrade_image]]
851 +
852 +== 3.8 LEDs ==
853 +
854 +(% border="1" style="background-color:#f7faff; width:500px" %)
855 +|=**LEDs**|=**Feature**
856 +|**PWR**|Always on if there is power
857 +|**SYS**|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN** (%%)for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds**(%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.
858 +
859 +
860 +
861 += 4. Case Study =
862 +
863 +User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]
864 +
865 +
866 += 5. Use AT Command =
867 +
868 +== 5.1 Access AT Command ==
869 +
870 +RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
871 +
872 +[[image:1654162355560-817.png]]
873 +
874 +
875 +In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
876 +
877 +[[image:1654162368066-342.png]]
878 +
879 +
880 +More detail AT Command manual can be found at [[AT Command Manual>>||anchor="3.5ConfigureRS485-BLviaATorDownlink"]]
881 +
882 +
883 +== 5.2 Common AT Command Sequence ==
884 +
885 +=== 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
886 +
887 +If device has not joined network yet:
888 +
889 +(% class="box infomessage" %)
890 +(((
891 +**AT+FDR**
892 +)))
893 +
894 +(% class="box infomessage" %)
895 +(((
896 +**AT+NJM=0**
897 +)))
898 +
899 +(% class="box infomessage" %)
900 +(((
901 +**ATZ**
902 +)))
903 +
904 +
905 +If device already joined network:
906 +
907 +(% class="box infomessage" %)
908 +(((
909 +**AT+NJM=0**
910 +)))
911 +
912 +(% class="box infomessage" %)
913 +(((
914 +**ATZ**
915 +)))
916 +
917 +
918 +=== 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
919 +
920 +
921 +(% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
922 +
923 +(% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%)Set to ABP mode
924 +
925 +(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
926 +
927 +(% style="background-color:#dcdcdc" %)**AT+DR=5**  (%%)Set Data Rate
928 +
929 +(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
930 +
931 +(% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) Set transmit frequency to 868.4Mhz
932 +
933 +(% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
934 +
935 +(% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
936 +
937 +(% style="background-color:#dcdcdc" %)**AT+DADDR=26** (%%) 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
938 +
939 +(% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
940 +
941 +
942 +(% style="color:red" %)**Note:**
943 +
944 +(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
945 +2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
946 +3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
947 +4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
948 +
949 +[[image:1654136435598-589.png]]
950 +
951 +
952 += 6. FAQ =
953 +
954 +== 6.1 How to upgrade the image? ==
955 +
956 +The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
957 +
958 +* Support new features
959 +* For bug fix
960 +* Change LoRaWAN bands.
961 +
962 +Below shows the hardware connection for how to upload an image to RS485-BL:
963 +
964 +[[image:1654136646995-976.png]]
965 +
966 +**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
967 +
968 +**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
969 +
970 +**Step3: **Open flashloader; choose the correct COM port to update.
971 +
972 +[[image:image-20220602102605-1.png]]
973 +
974 +
975 +[[image:image-20220602102637-2.png]]
976 +
977 +
978 +[[image:image-20220602102715-3.png]]
979 +
980 +
981 +
982 +== 6.2 How to change the LoRa Frequency Bands/Region? ==
983 +
984 +User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
985 +
986 +
987 +
988 +== 6.3 How many RS485-Slave can RS485-BL connects? ==
989 +
990 +The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
991 +
992 +
993 +
994 += 7. Trouble Shooting =
995 +
996 +
997 +== 7.1 Downlink doesn’t work, how to solve it? ==
998 +
999 +Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
1000 +
1001 +
1002 +== 7.2 Why I can’t join TTN V3 in US915 /AU915 bands? ==
1003 +
1004 +It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1005 +
1006 +
1007 += 8. Order Info =
1008 +
1009 +(% style="color:blue" %)**Part Number: RS485-BL-XXX**
1010 +
1011 +(% style="color:blue" %)**XXX:**
1012 +
1013 +* (% style="color:blue" %)**EU433**(%%): frequency bands EU433
1014 +* (% style="color:blue" %)**EU868**(%%): frequency bands EU868
1015 +* (% style="color:blue" %)**KR920**(%%): frequency bands KR920
1016 +* (% style="color:blue" %)**CN470**(%%): frequency bands CN470
1017 +* (% style="color:blue" %)**AS923**(%%): frequency bands AS923
1018 +* (% style="color:blue" %)**AU915**(%%): frequency bands AU915
1019 +* (% style="color:blue" %)**US915**(%%): frequency bands US915
1020 +* (% style="color:blue" %)**IN865**(%%): frequency bands IN865
1021 +* (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1022 +* (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1023 +
1024 +(% class="wikigeneratedid" %)
1025 +
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