Last modified by Bei Jinggeng on 2025/01/16 11:36
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From version < 60.11 >
edited by Xiaoling
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To version < 58.18 >
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Summary

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Title
... ... @@ -1,1 +1,1 @@
1 -RS485-LN – RS485 to LoRaWAN Converter User Manual
1 +RS485-LN – RS485 to LoRaWAN Converter
Content
... ... @@ -3,6 +3,7 @@
3 3  
4 4  
5 5  
6 +**RS485-LN – RS485 to LoRaWAN Converter User Manual**
6 6  
7 7  
8 8  
... ... @@ -24,8 +24,6 @@
24 24  (((
25 25  (((
26 26  (((
27 -
28 -
29 29  The Dragino RS485-LN is a (% style="color:blue" %)**RS485 to LoRaWAN Converter**(%%). It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
30 30  )))
31 31  )))
... ... @@ -49,8 +49,6 @@
49 49  
50 50  (((
51 51  (% style="color:blue" %)**Demo Dashboard for RS485-LN**(%%) connect to two energy meters: [[https:~~/~~/app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a>>url:https://app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a]]
52 -
53 -
54 54  )))
55 55  )))
56 56  )))
... ... @@ -106,6 +106,7 @@
106 106  * Support Modbus protocol
107 107  * Support Interrupt uplink (Since hardware version v1.2)
108 108  
106 +
109 109  == 1.4 Applications ==
110 110  
111 111  * Smart Buildings & Home Automation
... ... @@ -115,6 +115,7 @@
115 115  * Smart Cities
116 116  * Smart Factory
117 117  
116 +
118 118  == 1.5 Firmware Change log ==
119 119  
120 120  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
... ... @@ -183,13 +183,12 @@
183 183  
184 184  [[image:1653268227651-549.png||height="592" width="720"]]
185 185  
186 -
187 187  (((
188 188  The LG308 is already set to connect to [[TTN V3 network >>path:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
189 189  )))
190 190  
191 191  (((
192 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from RS485-LN.
190 +**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-LN.
193 193  )))
194 194  
195 195  (((
... ... @@ -199,7 +199,6 @@
199 199  
200 200  [[image:1652953462722-299.png]]
201 201  
202 -
203 203  (((
204 204  (((
205 205  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
... ... @@ -206,7 +206,7 @@
206 206  )))
207 207  
208 208  (((
209 -**Add APP EUI in the application.**
206 +Add APP EUI in the application.
210 210  )))
211 211  )))
212 212  
... ... @@ -222,15 +222,13 @@
222 222  
223 223  [[image:1652953542269-423.png||height="710" width="723"]]
224 224  
222 +Add APP KEY and DEV EUI
225 225  
226 -
227 -**Add APP KEY and DEV EUI**
228 -
229 229  [[image:1652953553383-907.png||height="514" width="724"]]
230 230  
231 231  
232 232  (((
233 -(% style="color:blue" %)**Step 2**(%%): Power on RS485-LN and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
228 +**Step 2**: Power on RS485-LN and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
234 234  )))
235 235  
236 236  [[image:1652953568895-172.png||height="232" width="724"]]
... ... @@ -240,15 +240,11 @@
240 240  
241 241  (((
242 242  (((
243 -(((
244 -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-LNviaATorDownlink"]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
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.
245 245  )))
246 -)))
247 247  
248 248  (((
249 -(((
250 250  (% 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
251 -)))
252 252  
253 253  
254 254  )))
... ... @@ -317,6 +317,7 @@
317 317  )))
318 318  
319 319  
311 +
320 320  === 3.3.2 Configure sensors ===
321 321  
322 322  (((
... ... @@ -328,20 +328,15 @@
328 328  (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
329 329  |=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
330 330  |AT+CFGDEV|(% style="width:110px" %)(((
331 -(((
332 332  This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
333 -)))
334 334  
335 -(((
336 336  AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
337 -)))
338 338  
339 -(((
340 340  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
341 -)))
342 342  )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
343 343  
344 344  
331 +
345 345  === 3.3.3 Configure read commands for each sampling ===
346 346  
347 347  (((
... ... @@ -354,7 +354,7 @@
354 354  During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
355 355  
356 356  
357 -(% style="color:#037691" %)**Each RS485 commands include two parts:**
344 +**Each RS485 commands include two parts:**
358 358  
359 359  ~1. What commands RS485-LN will send to the RS485 sensors. There are total 15 commands from **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF**. All commands are of same grammar.
360 360  
... ... @@ -369,11 +369,11 @@
369 369  Below are examples for the how above AT Commands works.
370 370  
371 371  
372 -(% style="color:#037691" %)**AT+COMMANDx **(%%)**: **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
359 +**AT+COMMANDx : **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
373 373  
374 374  (% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
375 375  |(% style="width:496px" %)(((
376 -(% style="color:#037691" %)**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
363 +**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
377 377  
378 378  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
379 379  
... ... @@ -385,7 +385,7 @@
385 385  In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
386 386  
387 387  
388 -(% style="color:#037691" %)**AT+DATACUTx **(%%)**: **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
375 +**AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
389 389  
390 390  (% border="1" style="background-color:#4bacc6; color:white; width:510px" %)
391 391  |(% style="width:510px" %)(((
... ... @@ -398,21 +398,20 @@
398 398  
399 399  **Examples:**
400 400  
401 -* (% style="color:#037691" %)**Grab bytes**
388 +* Grab bytes:
402 402  
403 403  [[image:image-20220602153621-1.png]]
404 404  
405 405  
406 -* (% style="color:#037691" %)**Grab a section**
393 +* Grab a section.
407 407  
408 408  [[image:image-20220602153621-2.png]]
409 409  
410 410  
411 -* (% style="color:#037691" %)**Grab different sections**
398 +* Grab different sections.
412 412  
413 413  [[image:image-20220602153621-3.png]]
414 414  
415 -
416 416  
417 417  )))
418 418  
... ... @@ -521,7 +521,7 @@
521 521  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
522 522  
523 523  
524 -== 3.5 Configure RS485-LN via AT or Downlink ==
510 +== 3.5 Configure RS485-BL via AT or Downlink ==
525 525  
526 526  (((
527 527  User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
... ... @@ -687,7 +687,7 @@
687 687  ==== **Set Payload version** ====
688 688  
689 689  (((
690 -This is the first byte of the uplink payload. RS485-LN can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
676 +This is the first byte of the uplink payload. RS485-BL can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
691 691  )))
692 692  
693 693  * (((
... ... @@ -785,7 +785,7 @@
785 785  XX XX XX XX: AT+COMMAND or AT+DATACUT command
786 786  )))
787 787  * (((
788 -YY:  If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.
774 +YY:  If YY=0, RS485-BL will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.
789 789  )))
790 790  
791 791  (((
... ... @@ -1097,122 +1097,62 @@
1097 1097  )))
1098 1098  
1099 1099  
1100 -
1101 -
1102 1102  == 3.6 Listening mode for RS485 network ==
1103 1103  
1104 -(((
1105 1105  This feature support since firmware v1.4
1106 -)))
1107 1107  
1108 -(((
1109 1109  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.
1110 -)))
1111 1111  
1112 1112  [[image:image-20220602171200-8.png||height="567" width="1007"]]
1113 1113  
1114 -(((
1115 1115  To enable the listening mode, use can run the command AT+RXMODE.
1116 -)))
1117 1117  
1118 -(((
1119 -
1120 -)))
1121 1121  
1122 -(% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1123 -|=(% style="width: 100px;" %)(((
1124 -**Command example**
1125 -)))|=(% style="width: 400px;" %)(((
1126 -**Function**
1127 -)))
1128 -|(% style="width:100px" %)(((
1129 -AT+RXMODE=1,10
1130 -)))|(% style="width:400px" %)(((
1131 -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.
1132 -)))
1133 -|(% style="width:100px" %)(((
1134 -AT+RXMODE=2,500
1135 -)))|(% style="width:400px" %)(((
1136 -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
1137 -)))
1138 -|(% style="width:100px" %)(((
1139 -AT+RXMODE=0,0
1140 -)))|(% style="width:400px" %)(((
1141 -Disable listening mode. This is the default settings.
1142 -)))
1143 -|(% style="width:100px" %)(((
1144 -
1145 -)))|(% style="width:400px" %)(((
1146 -A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
1147 -)))
1097 +(% border="1" style="background-color:#ffffcc; width:500px" %)
1098 +|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
1099 +|(% 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.
1100 +|(% 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
1101 +|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
1102 +|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
1148 1148  
1149 -(((
1150 1150  **Downlink Command:**
1151 -)))
1152 1152  
1153 -(((
1154 1154  **0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
1155 -)))
1156 1156  
1157 -(((
1158 -
1159 -)))
1160 1160  
1161 -(((
1162 1162  **Example**:
1163 -)))
1164 1164  
1165 -(((
1166 1166  The RS485-LN is set to AT+RXMODE=2,1000
1167 -)))
1168 1168  
1169 -(((
1170 1170  There is a two Modbus commands in the RS485 network as below:
1171 -)))
1172 1172  
1173 -(((
1174 1174  The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
1175 -)))
1176 1176  
1177 -(((
1178 1178  And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
1179 -)))
1180 1180  
1181 -(((
1182 1182  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
1183 -)))
1184 1184  
1185 -(((
1186 1186  [[image:image-20220602171200-9.png]]
1187 -)))
1188 1188  
1189 -(((
1190 -
1191 -)))
1192 1192  
1193 -(((
1194 -(((
1195 1195  (% 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.
1196 -)))
1197 -)))
1198 1198  
1199 1199  
1200 1200  == 3.7 Buttons ==
1201 1201  
1202 1202  
1203 -(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1204 -|=(% style="width: 50px;" %)**Button**|=(% style="width: 361px;" %)**Feature**
1205 -|(% 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**
1206 -|(% style="width:50px" %)**RST**|(% style="width:361px" %)Reboot RS485
1207 -|(% style="width:50px" %)**PRO**|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1130 +(% border="1" style="background-color:#f7faff; width:500px" %)
1131 +|=**Button**|=(% style="width: 1420px;" %)**Feature**
1132 +|**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**
1133 +|**RST**|(% style="width:1420px" %)Reboot RS485
1134 +|**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1208 1208  
1209 1209  == 3.8 LEDs ==
1210 1210  
1211 -
1212 -(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1213 -|=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
1138 +(% border="1" style="background-color:#f7faff; width:500px" %)
1139 +|=**LEDs**|=**Feature**
1214 1214  |**PWR**|Always on if there is power
1215 -|**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.
1141 +|**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.
1216 1216  
1217 1217  = 4. Case Study =
1218 1218  
... ... @@ -1223,26 +1223,19 @@
1223 1223  
1224 1224  == 5.1 Access AT Command ==
1225 1225  
1226 -(((
1227 -RS485-LN supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-LN to use AT command, as below.
1228 -)))
1152 +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.
1229 1229  
1230 1230  [[image:1654162355560-817.png]]
1231 1231  
1232 1232  
1233 -(((
1234 -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-LN. The default password is 123456. Below is the output for reference:
1235 -)))
1157 +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:
1236 1236  
1237 1237  [[image:1654162368066-342.png]]
1238 1238  
1239 1239  
1240 -(((
1241 1241  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/]]
1242 -)))
1243 1243  
1244 1244  
1245 -
1246 1246  == 5.2 Common AT Command Sequence ==
1247 1247  
1248 1248  === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
... ... @@ -1265,9 +1265,7 @@
1265 1265  )))
1266 1266  
1267 1267  
1268 -(((
1269 1269  If device already joined network:
1270 -)))
1271 1271  
1272 1272  (% class="box infomessage" %)
1273 1273  (((
... ... @@ -1306,12 +1306,10 @@
1306 1306  
1307 1307  (% style="color:red" %)**Note:**
1308 1308  
1309 -(((
1310 1310  (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1311 1311  2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1312 1312  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.
1313 1313  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
1314 -)))
1315 1315  
1316 1316  [[image:1654162478620-421.png]]
1317 1317  
... ... @@ -1320,45 +1320,25 @@
1320 1320  
1321 1321  == 6.1 How to upgrade the image? ==
1322 1322  
1323 -(((
1324 1324  The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
1325 -)))
1326 1326  
1327 -* (((
1328 -Support new features
1329 -)))
1330 -* (((
1331 -For bug fix
1332 -)))
1333 -* (((
1334 -Change LoRaWAN bands.
1335 -)))
1240 +* Support new features
1241 +* For bug fix
1242 +* Change LoRaWAN bands.
1336 1336  
1337 -(((
1338 1338  Below shows the hardware connection for how to upload an image to RS485-LN:
1339 -)))
1340 1340  
1341 1341  [[image:1654162535040-878.png]]
1342 1342  
1343 -(((
1344 1344  **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]].
1345 -)))
1346 1346  
1347 -(((
1348 1348  **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1349 -)))
1350 1350  
1351 -(((
1352 1352  **Step3: **Open flashloader; choose the correct COM port to update.
1353 -)))
1354 1354  
1355 1355  (((
1356 -(((
1357 -(((
1358 1358  (% 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.
1359 1359  )))
1360 -)))
1361 -)))
1362 1362  
1363 1363  
1364 1364  [[image:image-20220602175818-12.png]]
... ... @@ -1380,9 +1380,9 @@
1380 1380  User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1381 1381  
1382 1382  
1383 -== 6.3 How many RS485-Slave can RS485-LN connects? ==
1278 +== 6.3 How many RS485-Slave can RS485-BL connects? ==
1384 1384  
1385 -The RS485-LN can support max 32 RS485 devices. Each uplink command of RS485-LN can support max 16 different RS485 command. So RS485-LN 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"]].
1280 +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"]].
1386 1386  
1387 1387  
1388 1388  == 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
... ... @@ -1421,6 +1421,7 @@
1421 1421  * (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1422 1422  * (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
1423 1423  
1319 +
1424 1424  = 9.Packing Info =
1425 1425  
1426 1426  
... ... @@ -1437,6 +1437,7 @@
1437 1437  * Package Size / pcs : 14.5 x 8 x 5 cm
1438 1438  * Weight / pcs : 170g
1439 1439  
1336 +
1440 1440  = 10. FCC Caution for RS485LN-US915 =
1441 1441  
1442 1442  (((

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