Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 35.3 >
edited by Xiaoling
on 2022/06/02 15:44
To version < 32.2 >
edited by Xiaoling
on 2022/06/02 15:22
>
Change comment: There is no comment for this version

Summary

Details

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Content
... ... @@ -18,30 +18,28 @@
18 18  
19 19  (((
20 20  (((
21 -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.
21 +The Dragino RS485-LN is a **RS485 to LoRaWAN Converter**. It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
22 22  )))
23 23  
24 24  (((
25 -RS485-LN allows user to (% style="color:blue" %)**monitor / control RS485 devices**(%%) and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
25 +RS485-LN allows user to **monitor / control RS485 devices** and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
26 26  )))
27 27  
28 28  (((
29 -(% style="color:blue" %)**For data uplink**(%%), RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
29 +**For data uplink**, RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
30 30  )))
31 31  
32 32  (((
33 -(% style="color:blue" %)**For data downlink**(%%), RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
33 +**For data downlink**, RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
34 34  
35 -(% 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]]
35 +**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]]
36 36  )))
37 37  )))
38 38  
39 39  [[image:1653267211009-519.png||height="419" width="724"]]
40 40  
41 -
42 42  == 1.2 Specifications ==
43 43  
44 -
45 45  **Hardware System:**
46 46  
47 47  * STM32L072CZT6 MCU
... ... @@ -48,6 +48,8 @@
48 48  * SX1276/78 Wireless Chip 
49 49  * Power Consumption (exclude RS485 device):
50 50  ** Idle: 32mA@12v
49 +
50 +*
51 51  ** 20dB Transmit: 65mA@12v
52 52  
53 53  **Interface for Model:**
... ... @@ -76,8 +76,6 @@
76 76  * Automatic RF Sense and CAD with ultra-fast AFC.
77 77  * Packet engine up to 256 bytes with CRC.
78 78  
79 -
80 -
81 81  == 1.3 Features ==
82 82  
83 83  * LoRaWAN Class A & Class C protocol (default Class C)
... ... @@ -89,8 +89,6 @@
89 89  * Support Modbus protocol
90 90  * Support Interrupt uplink (Since hardware version v1.2)
91 91  
92 -
93 -
94 94  == 1.4 Applications ==
95 95  
96 96  * Smart Buildings & Home Automation
... ... @@ -100,13 +100,10 @@
100 100  * Smart Cities
101 101  * Smart Factory
102 102  
103 -
104 -
105 105  == 1.5 Firmware Change log ==
106 106  
107 107  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
108 108  
109 -
110 110  == 1.6 Hardware Change log ==
111 111  
112 112  (((
... ... @@ -114,8 +114,6 @@
114 114  v1.2: Add External Interrupt Pin.
115 115  
116 116  v1.0: Release
117 -
118 -
119 119  )))
120 120  )))
121 121  
... ... @@ -132,8 +132,6 @@
132 132  )))
133 133  
134 134  [[image:1653268091319-405.png]]
135 -
136 -
137 137  )))
138 138  
139 139  = 3. Operation Mode =
... ... @@ -142,8 +142,6 @@
142 142  
143 143  (((
144 144  The RS485-LN is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the RS485-LN. It will auto join the network via OTAA.
145 -
146 -
147 147  )))
148 148  
149 149  == 3.2 Example to join LoRaWAN network ==
... ... @@ -152,15 +152,10 @@
152 152  
153 153  [[image:1653268155545-638.png||height="334" width="724"]]
154 154  
155 -
156 156  (((
157 -(((
158 158  The RS485-LN in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method. The connection is as below:
159 -)))
160 160  
161 -(((
162 162  485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
163 -)))
164 164  
165 165  [[image:1653268227651-549.png||height="592" width="720"]]
166 166  
... ... @@ -212,7 +212,6 @@
212 212  
213 213  [[image:1652953568895-172.png||height="232" width="724"]]
214 214  
215 -
216 216  == 3.3 Configure Commands to read data ==
217 217  
218 218  (((
... ... @@ -222,8 +222,6 @@
222 222  
223 223  (((
224 224  (% 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
225 -
226 -
227 227  )))
228 228  )))
229 229  
... ... @@ -231,19 +231,19 @@
231 231  
232 232  To use RS485-LN to read data from RS485 sensors, connect the RS485-LN A/B traces to the sensors. And user need to make sure RS485-LN use the match UART setting to access the sensors. The related commands for UART settings are:
233 233  
234 -(% border="1" style="background-color:#ffffcc; color:green; width:782px" %)
235 -|(% style="width:128px" %)(((
213 +(% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
214 +|(((
236 236  **AT Commands**
237 -)))|(% style="width:305px" %)(((
216 +)))|(% style="width:285px" %)(((
238 238  **Description**
239 -)))|(% style="width:346px" %)(((
218 +)))|(% style="width:347px" %)(((
240 240  **Example**
241 241  )))
242 -|(% style="width:128px" %)(((
221 +|(((
243 243  AT+BAUDR
244 -)))|(% style="width:305px" %)(((
223 +)))|(% style="width:285px" %)(((
245 245  Set the baud rate (for RS485 connection). Default Value is: 9600.
246 -)))|(% style="width:346px" %)(((
225 +)))|(% style="width:347px" %)(((
247 247  (((
248 248  AT+BAUDR=9600
249 249  )))
... ... @@ -252,11 +252,11 @@
252 252  Options: (1200,2400,4800,14400,19200,115200)
253 253  )))
254 254  )))
255 -|(% style="width:128px" %)(((
234 +|(((
256 256  AT+PARITY
257 -)))|(% style="width:305px" %)(((
236 +)))|(% style="width:285px" %)(((
258 258  Set UART parity (for RS485 connection)
259 -)))|(% style="width:346px" %)(((
238 +)))|(% style="width:347px" %)(((
260 260  (((
261 261  AT+PARITY=0
262 262  )))
... ... @@ -265,9 +265,9 @@
265 265  Option: 0: no parity, 1: odd parity, 2: even parity
266 266  )))
267 267  )))
268 -|(% style="width:128px" %)(((
247 +|(((
269 269  AT+STOPBIT
270 -)))|(% style="width:305px" %)(((
249 +)))|(% style="width:285px" %)(((
271 271  (((
272 272  Set serial stopbit (for RS485 connection)
273 273  )))
... ... @@ -275,7 +275,7 @@
275 275  (((
276 276  
277 277  )))
278 -)))|(% style="width:346px" %)(((
257 +)))|(% style="width:347px" %)(((
279 279  (((
280 280  AT+STOPBIT=0 for 1bit
281 281  )))
... ... @@ -289,8 +289,6 @@
289 289  )))
290 290  )))
291 291  
292 -
293 -
294 294  === 3.3.2 Configure sensors ===
295 295  
296 296  (((
... ... @@ -309,41 +309,80 @@
309 309  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
310 310  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
311 311  
312 -
313 -
314 314  === 3.3.3 Configure read commands for each sampling ===
315 315  
316 316  (((
317 -During each sampling, we need confirm what commands we need to send to the RS485 sensors to read data. After the RS485 sensors send back the value, it normally include some bytes and we only need a few from them for a shorten payload.
292 +RS485-BL is a battery powered device; it will sleep most of time. And wake up on each period and read RS485 / TTL sensor data and uplink.
293 +)))
318 318  
295 +(((
296 +During each sampling, we need to confirm what commands we need to send to the sensors to read data. After the RS485/TTL sensors send back the value, it normally includes some bytes and we only need a few from them for a shorten payload.
297 +)))
298 +
299 +(((
319 319  To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
301 +)))
320 320  
303 +(((
321 321  This section describes how to achieve above goals.
305 +)))
322 322  
323 -During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
307 +(((
308 +During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
309 +)))
324 324  
311 +(((
312 +**Command from RS485-BL to Sensor:**
313 +)))
325 325  
326 -**Each RS485 commands include two parts:**
315 +(((
316 +RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
317 +)))
327 327  
328 -~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.
319 +(((
320 +**Handle return from sensors to RS485-BL**:
321 +)))
329 329  
330 -2. How to get wanted value the from RS485 sensors returns from by 1). There are total 15 AT Commands to handle the return, commands are **AT+DATACUT1**,**AT+DATACUT2**,…, **AT+DATACUTF** corresponding to the commands from 1). All commands are of same grammar.
323 +(((
324 +After RS485-BL send out a string to sensor, RS485-BL will wait for the return from RS485 or TTL sensor. And user can specify how to handle the return, by **AT+DATACUT or AT+SEARCH commands**
325 +)))
331 331  
332 -3. Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example
327 +* (((
328 +**AT+DATACUT**
329 +)))
333 333  
334 -**AT+CMDDL1=1000** to send the open time to 1000ms
331 +(((
332 +When the return value from sensor have fix length and we know which position the valid value we should get, we can use AT+DATACUT command.
333 +)))
335 335  
335 +* (((
336 +**AT+SEARCH**
337 +)))
336 336  
339 +(((
340 +When the return value from sensor is dynamic length and we are not sure which bytes the valid data is, instead, we know what value the valid value following. We can use AT+SEARCH to search the valid value in the return string.
341 +)))
342 +
343 +(((
344 +**Define wait timeout:**
345 +)))
346 +
347 +(((
348 +Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example, AT+CMDDL1=1000 to send the open time to 1000ms
349 +)))
350 +
351 +(((
337 337  After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
353 +)))
338 338  
355 +**Examples:**
339 339  
340 340  Below are examples for the how above AT Commands works.
341 341  
359 +**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
342 342  
343 -**AT+COMMANDx : **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
344 -
345 -(% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
346 -|(% style="width:496px" %)(((
361 +(% border="1" class="table-bordered" %)
362 +|(((
347 347  **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
348 348  
349 349  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
... ... @@ -351,42 +351,90 @@
351 351  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
352 352  )))
353 353  
370 +(((
354 354  For example, if we have a RS485 sensor. The command to get sensor value is: 01 03 0B B8 00 02 46 0A. Where 01 03 0B B8 00 02 is the Modbus command to read the register 0B B8 where stored the sensor value. The 46 0A is the CRC-16/MODBUS which calculate manually.
372 +)))
355 355  
356 -In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
374 +(((
375 +In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
376 +)))
357 357  
378 +(((
379 +**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
380 +)))
358 358  
382 +(% border="1" class="table-bordered" %)
383 +|(((
384 +**AT+SEARCHx=aa,xx xx xx xx xx**
385 +
386 +* **aa: 1: prefix match mode; 2: prefix and suffix match mode**
387 +* **xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix**
388 +
389 +
390 +)))
391 +
392 +**Examples:**
393 +
394 +~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
395 +
396 +If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
397 +
398 +The valid data will be all bytes after 1E 56 34 , so it is (% style="background-color:yellow" %)** 2e 30 58 5f 36 41 30 31 00 49**
399 +
400 +[[image:1653269403619-508.png]]
401 +
402 +2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
403 +
404 +If we set AT+SEARCH1=2, 1E 56 34+31 00 49
405 +
406 +Device will search the bytes between 1E 56 34 and 31 00 49. So it is (% style="background-color:yellow" %)** 2e 30 58 5f 36 41 30**
407 +
408 +[[image:1653269438444-278.png]]
409 +
359 359  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
360 360  
361 -(% border="1" style="background-color:#4bacc6; color:white; width:725px" %)
362 -|(% style="width:722px" %)(((
412 +|(((
363 363  **AT+DATACUTx=a,b,c**
364 364  
365 365  * **a: length for the return of AT+COMMAND**
366 366  * **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
367 -* **c: define the position for valid value. **
417 +* **c: define the position for valid value.  **
368 368  )))
369 369  
420 +Examples:
370 370  
371 -**Examples:**
372 -
373 373  * Grab bytes:
374 374  
375 -[[image:image-20220602153621-1.png]]
424 +[[image:1653269551753-223.png||height="311" width="717"]]
376 376  
377 -
378 378  * Grab a section.
379 379  
380 -[[image:image-20220602153621-2.png]]
428 +[[image:1653269568276-930.png||height="325" width="718"]]
381 381  
382 -
383 383  * Grab different sections.
384 384  
385 -[[image:image-20220602153621-3.png]]
432 +[[image:1653269593172-426.png||height="303" width="725"]]
386 386  
387 -
388 -)))
434 +(% style="color:red" %)**Note:**
389 389  
436 +AT+SEARCHx and AT+DATACUTx can be used together, if both commands are set, RS485-BL will first process AT+SEARCHx on the return string and get a temporary string, and then process AT+DATACUTx on this temporary string to get the final payload. In this case, AT+DATACUTx need to set to format AT+DATACUTx=0,xx,xx where the return bytes set to 0.
437 +
438 +Example:
439 +
440 +(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
441 +
442 +(% style="color:red" %)AT+SEARCH1=1,1E 56 34
443 +
444 +(% style="color:red" %)AT+DATACUT1=0,2,1~~5
445 +
446 +(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
447 +
448 +(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
449 +
450 +(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
451 +
452 +[[image:1653269618463-608.png]]
453 +
390 390  === 3.3.4 Compose the uplink payload ===
391 391  
392 392  (((
... ... @@ -467,8 +467,8 @@
467 467  
468 468  
469 469  
470 -1.
471 -11.
534 +1.
535 +11.
472 472  111. Uplink on Interrupt
473 473  
474 474  Put the interrupt sensor between 3.3v_out and GPIO ext.[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]]
... ... @@ -482,7 +482,7 @@
482 482  AT+INTMOD=3  Interrupt trigger by rising edge.
483 483  
484 484  
485 -1.
549 +1.
486 486  11. Uplink Payload
487 487  
488 488  |**Size(bytes)**|**2**|**1**|**Length depends on the return from the commands**
... ... @@ -544,15 +544,15 @@
544 544  
545 545  * **Sensor Related Commands**: These commands are special designed for RS485-BL.  User can see these commands below:
546 546  
547 -1.
548 -11.
611 +1.
612 +11.
549 549  111. Common Commands:
550 550  
551 551  They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands>>url:http://wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands]]
552 552  
553 553  
554 -1.
555 -11.
618 +1.
619 +11.
556 556  111. Sensor related commands:
557 557  
558 558  ==== Choose Device Type (RS485 or TTL) ====
... ... @@ -858,13 +858,13 @@
858 858  
859 859  
860 860  
861 -1.
925 +1.
862 862  11. Buttons
863 863  
864 864  |**Button**|**Feature**
865 865  |**RST**|Reboot RS485-BL
866 866  
867 -1.
931 +1.
868 868  11. +3V3 Output
869 869  
870 870  RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
... ... @@ -882,7 +882,7 @@
882 882  By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
883 883  
884 884  
885 -1.
949 +1.
886 886  11. +5V Output
887 887  
888 888  RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
... ... @@ -902,13 +902,13 @@
902 902  
903 903  
904 904  
905 -1.
969 +1.
906 906  11. LEDs
907 907  
908 908  |**LEDs**|**Feature**
909 909  |**LED1**|Blink when device transmit a packet.
910 910  
911 -1.
975 +1.
912 912  11. Switch Jumper
913 913  
914 914  |**Switch Jumper**|**Feature**
... ... @@ -954,7 +954,7 @@
954 954  
955 955  
956 956  
957 -1.
1021 +1.
958 958  11. Common AT Command Sequence
959 959  111. Multi-channel ABP mode (Use with SX1301/LG308)
960 960  
... ... @@ -973,8 +973,8 @@
973 973  
974 974  ATZ
975 975  
976 -1.
977 -11.
1040 +1.
1041 +11.
978 978  111. Single-channel ABP mode (Use with LG01/LG02)
979 979  
980 980  AT+FDR   Reset Parameters to Factory Default, Keys Reserve
... ... @@ -1049,7 +1049,7 @@
1049 1049  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]
1050 1050  
1051 1051  
1052 -1.
1116 +1.
1053 1053  11. How to change the LoRa Frequency Bands/Region?
1054 1054  
1055 1055  User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
... ... @@ -1056,7 +1056,7 @@
1056 1056  
1057 1057  
1058 1058  
1059 -1.
1123 +1.
1060 1060  11. How many RS485-Slave can RS485-BL connects?
1061 1061  
1062 1062  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>>path:#downlink_A8]].
... ... @@ -1073,7 +1073,7 @@
1073 1073  
1074 1074  
1075 1075  
1076 -1.
1140 +1.
1077 1077  11. Why I can’t join TTN V3 in US915 /AU915 bands?
1078 1078  
1079 1079  It might about the channels mapping. Please see for detail.
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