Last modified by Bei Jinggeng on 2025/01/16 11:36
<
From version < 58.11 >
edited by Xiaoling
on 2022/06/06 11:22
To version < 58.27 >
edited by Xiaoling
on 2022/06/06 11:27
>
Change comment: There is no comment for this version

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Content
... ... @@ -831,6 +831,7 @@
831 831  
832 832  
833 833  
834 +
834 834  ==== **RS485 command timeout** ====
835 835  
836 836  (((
... ... @@ -886,6 +886,7 @@
886 886  
887 887  
888 888  
890 +
889 889  ==== **Uplink payload mode** ====
890 890  
891 891  (((
... ... @@ -935,142 +935,270 @@
935 935  
936 936  ==== **Manually trigger an Uplink** ====
937 937  
940 +(((
938 938  Ask device to send an uplink immediately.
942 +)))
939 939  
940 -* **AT Command:**
944 +* (((
945 +**AT Command:**
946 +)))
941 941  
948 +(((
942 942  No AT Command for this, user can press the [[ACT button>>||anchor="H3.7Buttons"]] for 1 second for the same.
950 +)))
943 943  
952 +(((
953 +
954 +)))
944 944  
945 -* **Downlink Payload:**
956 +* (((
957 +**Downlink Payload:**
958 +)))
946 946  
960 +(((
947 947  **0x08 FF**, RS485-LN will immediately send an uplink.
962 +)))
948 948  
949 949  
950 950  
966 +
951 951  ==== **Clear RS485 Command** ====
952 952  
969 +(((
953 953  The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
971 +)))
954 954  
955 -* **AT Command:**
973 +* (((
974 +**AT Command:**
975 +)))
956 956  
977 +(((
957 957  **AT+CMDEAR=mm,nn**   mm: start position of erase ,nn: stop position of erase
979 +)))
958 958  
981 +(((
959 959  Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
983 +)))
960 960  
985 +(((
961 961  Example screen shot after clear all RS485 commands. 
987 +)))
962 962  
989 +(((
990 +
991 +)))
963 963  
993 +(((
964 964  The uplink screen shot is:
995 +)))
965 965  
966 966  [[image:1654160691922-496.png]]
967 967  
968 968  
969 -* **Downlink Payload:**
1000 +* (((
1001 +**Downlink Payload:**
1002 +)))
970 970  
1004 +(((
971 971  **0x09 aa bb** same as AT+CMDEAR=aa,bb
1006 +)))
972 972  
973 973  
974 974  
1010 +
975 975  ==== **Set Serial Communication Parameters** ====
976 976  
1013 +(((
977 977  Set the Rs485 serial communication parameters:
1015 +)))
978 978  
979 -* **AT Command:**
1017 +* (((
1018 +**AT Command:**
1019 +)))
980 980  
1021 +(((
981 981  Set Baud Rate:
1023 +)))
982 982  
983 983  (% class="box infomessage" %)
984 984  (((
1027 +(((
985 985  **AT+BAUDR=9600**    ~/~/ Options: (1200,2400,4800,14400,19200,115200)
986 986  )))
1030 +)))
987 987  
1032 +(((
988 988  Set UART Parity
1034 +)))
989 989  
990 990  (% class="box infomessage" %)
991 991  (((
1038 +(((
992 992  **AT+PARITY=0**    ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
993 993  )))
1041 +)))
994 994  
1043 +(((
995 995  Set STOPBIT
1045 +)))
996 996  
997 997  (% class="box infomessage" %)
998 998  (((
1049 +(((
999 999  **AT+STOPBIT=0**    ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1000 1000  )))
1052 +)))
1001 1001  
1054 +(((
1055 +
1056 +)))
1002 1002  
1003 -* **Downlink Payload:**
1058 +* (((
1059 +**Downlink Payload:**
1060 +)))
1004 1004  
1062 +(((
1005 1005  **A7 01 aa bb**: Same  AT+BAUDR=hex(aa bb)*100
1064 +)))
1006 1006  
1066 +(((
1007 1007  **Example:**
1068 +)))
1008 1008  
1009 -* A7 01 00 60   same as AT+BAUDR=9600
1010 -* 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 +)))
1011 1011  
1077 +(((
1012 1012  A7 02 aa: Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1079 +)))
1013 1013  
1081 +(((
1014 1014  A7 03 aa: Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1083 +)))
1015 1015  
1016 1016  
1086 +
1087 +
1017 1017  == 3.6 Listening mode for RS485 network ==
1018 1018  
1090 +(((
1019 1019  This feature support since firmware v1.4
1092 +)))
1020 1020  
1094 +(((
1021 1021  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 +)))
1022 1022  
1023 1023  [[image:image-20220602171200-8.png||height="567" width="1007"]]
1024 1024  
1100 +(((
1025 1025  To enable the listening mode, use can run the command AT+RXMODE.
1102 +)))
1026 1026  
1104 +(((
1105 +
1106 +)))
1027 1027  
1028 -(% border="1" style="background-color:#ffffcc; width:500px" %)
1029 -|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
1030 -|(% 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.
1031 -|(% 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
1032 -|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
1033 -|(% 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 +)))
1034 1034  
1135 +(((
1035 1035  **Downlink Command:**
1137 +)))
1036 1036  
1139 +(((
1037 1037  **0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
1141 +)))
1038 1038  
1143 +(((
1144 +
1145 +)))
1039 1039  
1147 +(((
1040 1040  **Example**:
1149 +)))
1041 1041  
1151 +(((
1042 1042  The RS485-LN is set to AT+RXMODE=2,1000
1153 +)))
1043 1043  
1155 +(((
1044 1044  There is a two Modbus commands in the RS485 network as below:
1157 +)))
1045 1045  
1159 +(((
1046 1046  The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
1161 +)))
1047 1047  
1163 +(((
1048 1048  And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
1165 +)))
1049 1049  
1167 +(((
1050 1050  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 +)))
1051 1051  
1171 +(((
1052 1052  [[image:image-20220602171200-9.png]]
1173 +)))
1053 1053  
1175 +(((
1176 +
1177 +)))
1054 1054  
1179 +(((
1055 1055  (% 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 +)))
1056 1056  
1057 1057  
1058 1058  == 3.7 Buttons ==
1059 1059  
1060 1060  
1061 -(% border="1" style="background-color:#f7faff; width:500px" %)
1187 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1062 1062  |=**Button**|=(% style="width: 1420px;" %)**Feature**
1063 1063  |**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**
1064 1064  |**RST**|(% style="width:1420px" %)Reboot RS485
1065 1065  |**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1066 1066  
1193 +
1194 +
1067 1067  == 3.8 LEDs ==
1068 1068  
1069 -(% border="1" style="background-color:#f7faff; width:500px" %)
1197 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1070 1070  |=**LEDs**|=**Feature**
1071 1071  |**PWR**|Always on if there is power
1072 1072  |**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.
1073 1073  
1202 +
1203 +
1074 1074  = 4. Case Study =
1075 1075  
1076 1076  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]]
... ... @@ -1080,19 +1080,26 @@
1080 1080  
1081 1081  == 5.1 Access AT Command ==
1082 1082  
1213 +(((
1083 1083  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 +)))
1084 1084  
1085 1085  [[image:1654162355560-817.png]]
1086 1086  
1087 1087  
1220 +(((
1088 1088  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 +)))
1089 1089  
1090 1090  [[image:1654162368066-342.png]]
1091 1091  
1092 1092  
1227 +(((
1093 1093  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 +)))
1094 1094  
1095 1095  
1232 +
1096 1096  == 5.2 Common AT Command Sequence ==
1097 1097  
1098 1098  === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===

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