Last modified by Bei Jinggeng on 2025/01/16 11:36
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From version < 58.19 >
edited by Xiaoling
on 2022/06/06 11:24
To version < 60.2 >
edited by Xiaoling
on 2022/06/14 10:49
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Title
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1 -RS485-LN – RS485 to LoRaWAN Converter
1 +RS485-LN – RS485 to LoRaWAN Converter User Manual
Content
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3 3  
4 4  
5 5  
6 -**RS485-LN – RS485 to LoRaWAN Converter User Manual**
7 7  
8 8  
9 9  
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92 92  * Automatic RF Sense and CAD with ultra-fast AFC.
93 93  * Packet engine up to 256 bytes with CRC
94 94  
94 +
95 95  == 1.3 Features ==
96 96  
97 97  * LoRaWAN Class A & Class C protocol (default Class C)
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235 235  
236 236  (((
237 237  (((
238 +(((
238 238  There are plenty of RS485 devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-LN supports flexible command set. User can use [[AT Commands>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
239 239  )))
241 +)))
240 240  
241 241  (((
244 +(((
242 242  (% style="color:red" %)Note: below description and commands are for firmware version >v1.1, if you have firmware version v1.0. Please check the [[user manual v1.0>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/&file=RS485-LN_UserManual_v1.0.1.pdf]] or upgrade the firmware to v1.1
246 +)))
243 243  
244 244  
245 245  )))
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308 308  )))
309 309  
310 310  
311 -
312 312  === 3.3.2 Configure sensors ===
313 313  
314 314  (((
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320 320  (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
321 321  |=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
322 322  |AT+CFGDEV|(% style="width:110px" %)(((
326 +(((
323 323  This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
328 +)))
324 324  
330 +(((
325 325  AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
332 +)))
326 326  
334 +(((
327 327  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
336 +)))
328 328  )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
329 329  
330 330  
331 -
332 332  === 3.3.3 Configure read commands for each sampling ===
333 333  
334 334  (((
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1087 1087  
1088 1088  == 3.6 Listening mode for RS485 network ==
1089 1089  
1098 +(((
1090 1090  This feature support since firmware v1.4
1100 +)))
1091 1091  
1102 +(((
1092 1092  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.
1104 +)))
1093 1093  
1094 1094  [[image:image-20220602171200-8.png||height="567" width="1007"]]
1095 1095  
1108 +(((
1096 1096  To enable the listening mode, use can run the command AT+RXMODE.
1110 +)))
1097 1097  
1112 +(((
1113 +
1114 +)))
1098 1098  
1099 -(% border="1" style="background-color:#ffffcc; width:500px" %)
1100 -|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
1101 -|(% 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.
1102 -|(% 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
1103 -|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
1104 -|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
1116 +(% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1117 +|=(% style="width: 100px;" %)(((
1118 +**Command example**
1119 +)))|=(% style="width: 400px;" %)(((
1120 +**Function**
1121 +)))
1122 +|(% style="width:100px" %)(((
1123 +AT+RXMODE=1,10
1124 +)))|(% style="width:400px" %)(((
1125 +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.
1126 +)))
1127 +|(% style="width:100px" %)(((
1128 +AT+RXMODE=2,500
1129 +)))|(% style="width:400px" %)(((
1130 +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
1131 +)))
1132 +|(% style="width:100px" %)(((
1133 +AT+RXMODE=0,0
1134 +)))|(% style="width:400px" %)(((
1135 +Disable listening mode. This is the default settings.
1136 +)))
1137 +|(% style="width:100px" %)(((
1138 +
1139 +)))|(% style="width:400px" %)(((
1140 +A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
1141 +)))
1105 1105  
1143 +(((
1106 1106  **Downlink Command:**
1145 +)))
1107 1107  
1147 +(((
1108 1108  **0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
1149 +)))
1109 1109  
1151 +(((
1152 +
1153 +)))
1110 1110  
1155 +(((
1111 1111  **Example**:
1157 +)))
1112 1112  
1159 +(((
1113 1113  The RS485-LN is set to AT+RXMODE=2,1000
1161 +)))
1114 1114  
1163 +(((
1115 1115  There is a two Modbus commands in the RS485 network as below:
1165 +)))
1116 1116  
1167 +(((
1117 1117  The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
1169 +)))
1118 1118  
1171 +(((
1119 1119  And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
1173 +)))
1120 1120  
1175 +(((
1121 1121  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
1177 +)))
1122 1122  
1179 +(((
1123 1123  [[image:image-20220602171200-9.png]]
1181 +)))
1124 1124  
1183 +(((
1184 +
1185 +)))
1125 1125  
1187 +(((
1188 +(((
1126 1126  (% 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.
1190 +)))
1191 +)))
1127 1127  
1128 1128  
1129 1129  == 3.7 Buttons ==
1130 1130  
1131 1131  
1132 -(% border="1" style="background-color:#f7faff; width:500px" %)
1133 -|=**Button**|=(% style="width: 1420px;" %)**Feature**
1134 -|**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**
1135 -|**RST**|(% style="width:1420px" %)Reboot RS485
1136 -|**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1197 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1198 +|=(% style="width: 50px;" %)**Button**|=(% style="width: 361px;" %)**Feature**
1199 +|(% style="width:50px" %)**ACT**|(% style="width:361px" %)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**
1200 +|(% style="width:50px" %)**RST**|(% style="width:361px" %)Reboot RS485
1201 +|(% style="width:50px" %)**PRO**|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1137 1137  
1203 +
1138 1138  == 3.8 LEDs ==
1139 1139  
1140 -(% border="1" style="background-color:#f7faff; width:500px" %)
1141 -|=**LEDs**|=**Feature**
1206 +
1207 +(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1208 +|=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
1142 1142  |**PWR**|Always on if there is power
1143 -|**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.
1210 +|**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.
1144 1144  
1212 +
1145 1145  = 4. Case Study =
1146 1146  
1147 1147  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]]
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1151 1151  
1152 1152  == 5.1 Access AT Command ==
1153 1153  
1222 +(((
1154 1154  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.
1224 +)))
1155 1155  
1156 1156  [[image:1654162355560-817.png]]
1157 1157  
1158 1158  
1229 +(((
1159 1159  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:
1231 +)))
1160 1160  
1161 1161  [[image:1654162368066-342.png]]
1162 1162  
1163 1163  
1236 +(((
1164 1164  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/]]
1238 +)))
1165 1165  
1166 1166  
1241 +
1167 1167  == 5.2 Common AT Command Sequence ==
1168 1168  
1169 1169  === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
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1186 1186  )))
1187 1187  
1188 1188  
1264 +(((
1189 1189  If device already joined network:
1266 +)))
1190 1190  
1191 1191  (% class="box infomessage" %)
1192 1192  (((
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1225 1225  
1226 1226  (% style="color:red" %)**Note:**
1227 1227  
1305 +(((
1228 1228  (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1229 1229  2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1230 1230  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.
1231 1231  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
1310 +)))
1232 1232  
1233 1233  [[image:1654162478620-421.png]]
1234 1234  
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1237 1237  
1238 1238  == 6.1 How to upgrade the image? ==
1239 1239  
1319 +(((
1240 1240  The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
1321 +)))
1241 1241  
1242 -* Support new features
1243 -* For bug fix
1244 -* Change LoRaWAN bands.
1323 +* (((
1324 +Support new features
1325 +)))
1326 +* (((
1327 +For bug fix
1328 +)))
1329 +* (((
1330 +Change LoRaWAN bands.
1331 +)))
1245 1245  
1333 +(((
1246 1246  Below shows the hardware connection for how to upload an image to RS485-LN:
1335 +)))
1247 1247  
1248 1248  [[image:1654162535040-878.png]]
1249 1249  
1339 +(((
1250 1250  **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]].
1341 +)))
1251 1251  
1343 +(((
1252 1252  **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1345 +)))
1253 1253  
1347 +(((
1254 1254  **Step3: **Open flashloader; choose the correct COM port to update.
1349 +)))
1255 1255  
1256 1256  (((
1352 +(((
1353 +(((
1257 1257  (% style="color:blue" %) 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.
1258 1258  )))
1356 +)))
1357 +)))
1259 1259  
1260 1260  
1261 1261  [[image:image-20220602175818-12.png]]
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1318 1318  * (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1319 1319  * (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1320 1320  
1321 -
1322 1322  = 9.Packing Info =
1323 1323  
1324 1324  
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1335 1335  * Package Size / pcs : 14.5 x 8 x 5 cm
1336 1336  * Weight / pcs : 170g
1337 1337  
1338 -
1339 1339  = 10. FCC Caution for RS485LN-US915 =
1340 1340  
1341 1341  (((

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