Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 51.8 >
edited by Xiaoling
on 2022/06/02 17:55
To version < 47.1 >
edited by Xiaoling
on 2022/06/02 17:12
>
Change comment: Uploaded new attachment "image-20220602171200-9.png", version {1}

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... ... @@ -743,7 +743,7 @@
743 743  
744 744  Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
745 745  
746 -Example screen shot after clear all RS485 commands. 
746 +Example screen shot after clear all RS485 commands.
747 747  
748 748  
749 749  The uplink screen shot is:
... ... @@ -799,277 +799,5 @@
799 799  A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
800 800  
801 801  
802 -== 3.6 Listening mode for RS485 network ==
803 803  
804 -This feature support since firmware v1.4
805 -
806 -RS485-LN supports listening mode, it can listen the RS485 network packets and send them via LoRaWAN uplink. Below is the structure. The blue arrow shows the RS485 network packets to RS485-LN.
807 -
808 -[[image:image-20220602171200-8.png||height="567" width="1007"]]
809 -
810 -To enable the listening mode, use can run the command AT+RXMODE.
811 -
812 -
813 -(% border="1" style="background-color:#ffffcc; width:500px" %)
814 -|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
815 -|(% style="width:161px" %)AT+RXMODE=1,10 |(% style="width:337px" %)Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.
816 -|(% style="width:161px" %)AT+RXMODE=2,500|(% style="width:337px" %)Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms
817 -|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
818 -|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
819 -
820 -**Downlink Command:**
821 -
822 -**0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
823 -
824 -
825 -**Example**:
826 -
827 -The RS485-LN is set to AT+RXMODE=2,1000
828 -
829 -There is a two Modbus commands in the RS485 network as below:
830 -
831 -The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
832 -
833 -And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
834 -
835 -RS485-LN will capture both and send the uplink: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b  (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
836 -
837 -[[image:image-20220602171200-9.png]]
838 -
839 -
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 -
842 -
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 -= 4. Case Study =
860 -
861 -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]]
862 -
863 -
864 -= 5. Use AT Command =
865 -
866 -== 5.1 Access AT Command ==
867 -
868 -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.
869 -
870 -[[image:1654162355560-817.png]]
871 -
872 -
873 -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:
874 -
875 -[[image:1654162368066-342.png]]
876 -
877 -
878 -More detail AT Command manual can be found at [[AT Command Manual>>||anchor="3.5ConfigureRS485-BLviaATorDownlink"]]
879 -
880 -
881 -== 5.2 Common AT Command Sequence ==
882 -
883 -=== 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
884 -
885 -If device has not joined network yet:
886 -
887 -(% class="box infomessage" %)
888 -(((
889 -**AT+FDR**
890 -)))
891 -
892 -(% class="box infomessage" %)
893 -(((
894 -**AT+NJM=0**
895 -)))
896 -
897 -(% class="box infomessage" %)
898 -(((
899 -**ATZ**
900 -)))
901 -
902 -
903 -If device already joined network:
904 -
905 -(% class="box infomessage" %)
906 -(((
907 -**AT+NJM=0**
908 -)))
909 -
910 -(% class="box infomessage" %)
911 -(((
912 -**ATZ**
913 -)))
914 -
915 -
916 -=== 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
917 -
918 -
919 -(% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
920 -
921 -(% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%)Set to ABP mode
922 -
923 -(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
924 -
925 -(% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%)Set Data Rate
926 -
927 -(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
928 -
929 -(% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) Set transmit frequency to 868.4Mhz
930 -
931 -(% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
932 -
933 -(% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
934 -
935 -(% 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.
936 -
937 -(% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
938 -
939 -
940 -(% style="color:red" %)**Note:**
941 -
942 -(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
943 -2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
944 -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.
945 -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
946 -
947 -[[image:1654162478620-421.png]]
948 -
949 -
950 -= 6. FAQ =
951 -
952 -== 6.1 How to upgrade the image? ==
953 -
954 -The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
955 -
956 -* Support new features
957 -* For bug fix
958 -* Change LoRaWAN bands.
959 -
960 -Below shows the hardware connection for how to upload an image to RS485-LN:
961 -
962 -[[image:1654162535040-878.png]]
963 -
964 -**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]].
965 -
966 -**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
967 -
968 -**Step3: **Open flashloader; choose the correct COM port to update.
969 -
970 -(% style="color:#037691" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.
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 -== 6.2 How to change the LoRa Frequency Bands/Region? ==
982 -
983 -User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
984 -
985 -
986 -== 6.3 How many RS485-Slave can RS485-BL connects? ==
987 -
988 -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"]].
989 -
990 -
991 -== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
992 -
993 -When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
994 -
995 -Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
996 -
997 -
998 -= 7. Trouble Shooting =
999 -
1000 -== 7.1 Downlink doesn’t work, how to solve it? ==
1001 -
1002 -Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
1003 -
1004 -
1005 -== 7.2 Why I can’t join TTN V3 in US915 /AU915 bands? ==
1006 -
1007 -It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1008 -
1009 -
1010 -= 8. Order Info =
1011 -
1012 -(% style="color:blue" %)**Part Number: RS485-LN-XXX**
1013 -
1014 -(% style="color:blue" %)**XXX:**
1015 -
1016 -* (% style="color:blue" %)**EU433**(%%): frequency bands EU433
1017 -* (% style="color:blue" %)**EU868**(%%): frequency bands EU868
1018 -* (% style="color:blue" %)**KR920**(%%): frequency bands KR920
1019 -* (% style="color:blue" %)**CN470**(%%): frequency bands CN470
1020 -* (% style="color:blue" %)**AS923**(%%): frequency bands AS923
1021 -* (% style="color:blue" %)**AU915**(%%): frequency bands AU915
1022 -* (% style="color:blue" %)**US915**(%%): frequency bands US915
1023 -* (% style="color:blue" %)**IN865**(%%): frequency bands IN865
1024 -* (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1025 -* (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1026 -
1027 -
1028 -(% class="wikigeneratedid" %)
1029 -= 9.Packing Info =
1030 -
1031 -
1032 -**Package Includes**:
1033 -
1034 -* RS485-LN x 1
1035 -* Stick Antenna for LoRa RF part x 1
1036 -* Program cable x 1
1037 -
1038 -
1039 -**Dimension and weight**:
1040 -
1041 -* Device Size: 13.5 x 7 x 3 cm
1042 -* Device Weight: 105g
1043 -* Package Size / pcs : 14.5 x 8 x 5 cm
1044 -* Weight / pcs : 170g
1045 -
1046 -
1047 -= 10. FCC Caution for RS485LN-US915 =
1048 -
1049 -Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
1050 -
1051 -This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
1052 -
1053 -
1054 -**IMPORTANT NOTE:**
1055 -
1056 -**Note: **This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
1057 -
1058 -—Reorient or relocate the receiving antenna.
1059 -
1060 -—Increase the separation between the equipment and receiver.
1061 -
1062 -—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
1063 -
1064 -—Consult the dealer or an experienced radio/TV technician for help.
1065 -
1066 -
1067 -**FCC Radiation Exposure Statement:**
1068 -
1069 -This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
1070 -
1071 -
1072 -= 11. Support =
1073 -
1074 -* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1075 -* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
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