Last modified by Bei Jinggeng on 2025/01/16 11:36
<
From version < 58.8 >
edited by Xiaoling
on 2022/06/06 11:22
To version < 58.27 >
edited by Xiaoling
on 2022/06/06 11:27
>
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... ... @@ -795,18 +795,35 @@
795 795  
796 796  ==== **Fast command to handle MODBUS device** ====
797 797  
798 +(((
798 798  AT+MBFUN is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
800 +)))
799 799  
802 +(((
800 800  This command is valid since v1.3 firmware version
804 +)))
801 801  
806 +(((
802 802  AT+MBFUN can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
808 +)))
803 803  
810 +(((
811 +
812 +)))
804 804  
814 +(((
805 805  **Example:**
816 +)))
806 806  
807 -* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
808 -* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
809 -* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
818 +* (((
819 +AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
820 +)))
821 +* (((
822 +AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
823 +)))
824 +* (((
825 +AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
826 +)))
810 810  
811 811  [[image:image-20220602165351-6.png]]
812 812  
... ... @@ -814,201 +814,376 @@
814 814  
815 815  
816 816  
834 +
817 817  ==== **RS485 command timeout** ====
818 818  
837 +(((
819 819  Some Modbus device has slow action to send replies. This command is used to configure the RS485-LN to use longer time to wait for their action.
839 +)))
820 820  
841 +(((
821 821  Default value: 0, range:  0 ~~ 65 seconds
843 +)))
822 822  
823 -* **AT Command:**
845 +* (((
846 +**AT Command:**
847 +)))
824 824  
825 825  (% class="box infomessage" %)
826 826  (((
851 +(((
827 827  **AT+CMDDLaa=hex(bb cc)*1000**
828 828  )))
854 +)))
829 829  
856 +(((
830 830  **Example:**
858 +)))
831 831  
860 +(((
832 832  **AT+CMDDL1=1000** to send the open time to 1000ms
862 +)))
833 833  
864 +(((
865 +
866 +)))
834 834  
835 -* **Downlink Payload:**
868 +* (((
869 +**Downlink Payload:**
870 +)))
836 836  
872 +(((
837 837  **0x AA aa bb cc**
874 +)))
838 838  
876 +(((
839 839  Same as: AT+CMDDLaa=hex(bb cc)*1000
878 +)))
840 840  
880 +(((
841 841   **Example:**
882 +)))
842 842  
884 +(((
843 843   0xAA 01 00 01  ~-~-> Same as **AT+CMDDL1=1000 ms**
886 +)))
844 844  
845 845  
846 846  
890 +
847 847  ==== **Uplink payload mode** ====
848 848  
893 +(((
849 849  Define to use one uplink or multiple uplinks for the sampling.
895 +)))
850 850  
897 +(((
851 851  The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]
899 +)))
852 852  
853 -* **AT Command:**
901 +* (((
902 +**AT Command:**
903 +)))
854 854  
855 855  (% class="box infomessage" %)
856 856  (((
907 +(((
857 857  **AT+DATAUP=0**
858 858  )))
910 +)))
859 859  
860 860  (% class="box infomessage" %)
861 861  (((
914 +(((
862 862  **AT+DATAUP=1**
863 863  )))
917 +)))
864 864  
919 +(((
920 +
921 +)))
865 865  
866 -* **Downlink Payload:**
923 +* (((
924 +**Downlink Payload:**
925 +)))
867 867  
927 +(((
868 868  **0xAD 00**  **~-~->** Same as AT+DATAUP=0
929 +)))
869 869  
931 +(((
870 870  **0xAD 01**  **~-~->** Same as AT+DATAUP=1
933 +)))
871 871  
872 872  
873 873  
937 +
874 874  ==== **Manually trigger an Uplink** ====
875 875  
940 +(((
876 876  Ask device to send an uplink immediately.
942 +)))
877 877  
878 -* **AT Command:**
944 +* (((
945 +**AT Command:**
946 +)))
879 879  
948 +(((
880 880  No AT Command for this, user can press the [[ACT button>>||anchor="H3.7Buttons"]] for 1 second for the same.
950 +)))
881 881  
952 +(((
953 +
954 +)))
882 882  
883 -* **Downlink Payload:**
956 +* (((
957 +**Downlink Payload:**
958 +)))
884 884  
960 +(((
885 885  **0x08 FF**, RS485-LN will immediately send an uplink.
962 +)))
886 886  
887 887  
888 888  
966 +
889 889  ==== **Clear RS485 Command** ====
890 890  
969 +(((
891 891  The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
971 +)))
892 892  
893 -* **AT Command:**
973 +* (((
974 +**AT Command:**
975 +)))
894 894  
977 +(((
895 895  **AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
979 +)))
896 896  
981 +(((
897 897  Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
983 +)))
898 898  
985 +(((
899 899  Example screen shot after clear all RS485 commands. 
987 +)))
900 900  
989 +(((
990 +
991 +)))
901 901  
993 +(((
902 902  The uplink screen shot is:
995 +)))
903 903  
904 904  [[image:1654160691922-496.png]]
905 905  
906 906  
907 -* **Downlink Payload:**
1000 +* (((
1001 +**Downlink Payload:**
1002 +)))
908 908  
1004 +(((
909 909  **0x09 aa bb** same as AT+CMDEAR=aa,bb
1006 +)))
910 910  
911 911  
912 912  
1010 +
913 913  ==== **Set Serial Communication Parameters** ====
914 914  
1013 +(((
915 915  Set the Rs485 serial communication parameters:
1015 +)))
916 916  
917 -* **AT Command:**
1017 +* (((
1018 +**AT Command:**
1019 +)))
918 918  
1021 +(((
919 919  Set Baud Rate:
1023 +)))
920 920  
921 921  (% class="box infomessage" %)
922 922  (((
1027 +(((
923 923  **AT+BAUDR=9600**    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
924 924  )))
1030 +)))
925 925  
1032 +(((
926 926  Set UART Parity
1034 +)))
927 927  
928 928  (% class="box infomessage" %)
929 929  (((
1038 +(((
930 930  **AT+PARITY=0**    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
931 931  )))
1041 +)))
932 932  
1043 +(((
933 933  Set STOPBIT
1045 +)))
934 934  
935 935  (% class="box infomessage" %)
936 936  (((
1049 +(((
937 937  **AT+STOPBIT=0**    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
938 938  )))
1052 +)))
939 939  
1054 +(((
1055 +
1056 +)))
940 940  
941 -* **Downlink Payload:**
1058 +* (((
1059 +**Downlink Payload:**
1060 +)))
942 942  
1062 +(((
943 943  **A7 01 aa bb**: Same  AT+BAUDR=hex(aa bb)*100
1064 +)))
944 944  
1066 +(((
945 945  **Example:**
1068 +)))
946 946  
947 -* A7 01 00 60   same as AT+BAUDR=9600
948 -* A7 01 04 80  same as AT+BAUDR=115200
1070 +* (((
1071 +A7 01 00 60   same as AT+BAUDR=9600
1072 +)))
1073 +* (((
1074 +A7 01 04 80  same as AT+BAUDR=115200
1075 +)))
949 949  
1077 +(((
950 950  A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1079 +)))
951 951  
1081 +(((
952 952  A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1083 +)))
953 953  
954 954  
1086 +
1087 +
955 955  == 3.6 Listening mode for RS485 network ==
956 956  
1090 +(((
957 957  This feature support since firmware v1.4
1092 +)))
958 958  
1094 +(((
959 959  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.
1096 +)))
960 960  
961 961  [[image:image-20220602171200-8.png||height="567" width="1007"]]
962 962  
1100 +(((
963 963  To enable the listening mode, use can run the command AT+RXMODE.
1102 +)))
964 964  
1104 +(((
1105 +
1106 +)))
965 965  
966 -(% border="1" style="background-color:#ffffcc; width:500px" %)
967 -|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
968 -|(% 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.
969 -|(% 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
970 -|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
971 -|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
1108 +(% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1109 +|=(% style="width: 161px;" %)(((
1110 +**Command example:**
1111 +)))|=(% style="width: 337px;" %)(((
1112 +**Function**
1113 +)))
1114 +|(% style="width:161px" %)(((
1115 +AT+RXMODE=1,10
1116 +)))|(% style="width:337px" %)(((
1117 +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.
1118 +)))
1119 +|(% style="width:161px" %)(((
1120 +AT+RXMODE=2,500
1121 +)))|(% style="width:337px" %)(((
1122 +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
1123 +)))
1124 +|(% style="width:161px" %)(((
1125 +AT+RXMODE=0,0
1126 +)))|(% style="width:337px" %)(((
1127 +Disable listening mode. This is the default settings.
1128 +)))
1129 +|(% style="width:161px" %)(((
1130 +
1131 +)))|(% style="width:337px" %)(((
1132 +A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
1133 +)))
972 972  
1135 +(((
973 973  **Downlink Command:**
1137 +)))
974 974  
1139 +(((
975 975  **0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
1141 +)))
976 976  
1143 +(((
1144 +
1145 +)))
977 977  
1147 +(((
978 978  **Example**:
1149 +)))
979 979  
1151 +(((
980 980  The RS485-LN is set to AT+RXMODE=2,1000
1153 +)))
981 981  
1155 +(((
982 982  There is a two Modbus commands in the RS485 network as below:
1157 +)))
983 983  
1159 +(((
984 984  The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
1161 +)))
985 985  
1163 +(((
986 986  And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
1165 +)))
987 987  
1167 +(((
988 988  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
1169 +)))
989 989  
1171 +(((
990 990  [[image:image-20220602171200-9.png]]
1173 +)))
991 991  
1175 +(((
1176 +
1177 +)))
992 992  
1179 +(((
993 993  (% 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.
1181 +)))
994 994  
995 995  
996 996  == 3.7 Buttons ==
997 997  
998 998  
999 -(% border="1" style="background-color:#f7faff; width:500px" %)
1187 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1000 1000  |=**Button**|=(% style="width: 1420px;" %)**Feature**
1001 1001  |**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**
1002 1002  |**RST**|(% style="width:1420px" %)Reboot RS485
1003 1003  |**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1004 1004  
1193 +
1194 +
1005 1005  == 3.8 LEDs ==
1006 1006  
1007 -(% border="1" style="background-color:#f7faff; width:500px" %)
1197 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1008 1008  |=**LEDs**|=**Feature**
1009 1009  |**PWR**|Always on if there is power
1010 1010  |**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.
1011 1011  
1202 +
1203 +
1012 1012  = 4. Case Study =
1013 1013  
1014 1014  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]]
... ... @@ -1018,19 +1018,26 @@
1018 1018  
1019 1019  == 5.1 Access AT Command ==
1020 1020  
1213 +(((
1021 1021  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.
1215 +)))
1022 1022  
1023 1023  [[image:1654162355560-817.png]]
1024 1024  
1025 1025  
1220 +(((
1026 1026  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:
1222 +)))
1027 1027  
1028 1028  [[image:1654162368066-342.png]]
1029 1029  
1030 1030  
1227 +(((
1031 1031  More detail AT Command manual can be found at [[AT Command Manual>>https://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1229 +)))
1032 1032  
1033 1033  
1232 +
1034 1034  == 5.2 Common AT Command Sequence ==
1035 1035  
1036 1036  === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===

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