Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 32.13 >
edited by Xiaoling
on 2022/06/02 15:26
To version < 22.1 >
edited by Xiaoling
on 2022/05/23 09:10
>
Change comment: Uploaded new attachment "1653268227651-549.png", version {1}

Summary

Details

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Content
... ... @@ -18,42 +18,40 @@
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.
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]]
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.
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 -* SX1276/78 Wireless Chip 
44 +* SX1276/78 Wireless Chip
49 49  * Power Consumption (exclude RS485 device):
50 50  ** Idle: 32mA@12v
47 +
48 +*
51 51  ** 20dB Transmit: 65mA@12v
52 52  
53 53  **Interface for Model:**
54 54  
55 55  * RS485
56 -* Power Input 7~~ 24V DC. 
54 +* Power Input 7~~ 24V DC.
57 57  
58 58  **LoRa Spec:**
59 59  
... ... @@ -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 ==
... ... @@ -152,35 +152,25 @@
152 152  
153 153  [[image:1653268155545-638.png||height="334" width="724"]]
154 154  
155 -
156 156  (((
157 -(((
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:
141 +The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
159 159  )))
160 160  
161 161  (((
162 -485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
145 +The LG308 is already set to connect to [[TTN V3 network >>url:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
163 163  )))
164 164  
165 -[[image:1653268227651-549.png||height="592" width="720"]]
166 -
167 167  (((
168 -The LG308 is already set to connect to [[TTN V3 network >>path:eu1.cloud.thethings.network/]]. So what we need to now is only configure the TTN V3:
149 +**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-BL.
169 169  )))
170 170  
171 171  (((
172 -**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-LN.
153 +Each RS485-BL is shipped with a sticker with unique device EUI:
173 173  )))
174 174  
175 -(((
176 -Each RS485-LN is shipped with a sticker with unique device EUI:
177 -)))
178 -)))
179 -
180 180  [[image:1652953462722-299.png]]
181 181  
182 182  (((
183 -(((
184 184  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
185 185  )))
186 186  
... ... @@ -187,11 +187,13 @@
187 187  (((
188 188  Add APP EUI in the application.
189 189  )))
190 -)))
191 191  
166 +
167 +
168 +
192 192  [[image:image-20220519174512-1.png]]
193 193  
194 -[[image:image-20220519174512-2.png||height="323" width="720"]]
171 +[[image:image-20220519174512-2.png||height="328" width="731"]]
195 195  
196 196  [[image:image-20220519174512-3.png||height="556" width="724"]]
197 197  
... ... @@ -207,7 +207,7 @@
207 207  
208 208  
209 209  (((
210 -**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.
187 +**Step 2**: Power on RS485-BL 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.
211 211  )))
212 212  
213 213  [[image:1652953568895-172.png||height="232" width="724"]]
... ... @@ -215,19 +215,23 @@
215 215  == 3.3 Configure Commands to read data ==
216 216  
217 217  (((
218 -(((
219 -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>>path:#AT_COMMAND]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
195 +There are plenty of RS485 and TTL level devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-BL supports flexible command set. User can use [[AT Commands or LoRaWAN Downlink>>path:#AT_COMMAND]] Command to configure how RS485-BL should read the sensor and how to handle the return from RS485 or TTL sensors.
220 220  )))
221 221  
222 -(((
223 -(% 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
224 -)))
225 -)))
226 -
227 227  === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
228 228  
229 -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:
200 +RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
230 230  
202 +**~1. RS485-MODBUS mode:**
203 +
204 +AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
205 +
206 +**2. TTL mode:**
207 +
208 +AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
209 +
210 +RS485-BL default UART settings is **9600, no parity, stop bit 1**. If the sensor has a different settings, user can change the RS485-BL setting to match.
211 +
231 231  (% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
232 232  |(((
233 233  **AT Commands**
... ... @@ -252,7 +252,13 @@
252 252  |(((
253 253  AT+PARITY
254 254  )))|(% style="width:285px" %)(((
236 +(((
255 255  Set UART parity (for RS485 connection)
238 +)))
239 +
240 +(((
241 +Default Value is: no parity.
242 +)))
256 256  )))|(% style="width:347px" %)(((
257 257  (((
258 258  AT+PARITY=0
... ... @@ -270,7 +270,7 @@
270 270  )))
271 271  
272 272  (((
273 -
260 +Default Value is: 1bit.
274 274  )))
275 275  )))|(% style="width:347px" %)(((
276 276  (((
... ... @@ -289,10 +289,12 @@
289 289  === 3.3.2 Configure sensors ===
290 290  
291 291  (((
279 +Some sensors might need to configure before normal operation. User can configure such sensor via PC or through RS485-BL AT Commands (% style="color:#4f81bd" %)**AT+CFGDEV**.
280 +)))
281 +
292 292  (((
293 -Some sensors might need to configure before normal operation. User can configure such sensor via PC and RS485 adapter or through RS485-LN AT Commands (% style="color:#4f81bd" %)**AT+CFGDEV**(%%). Each (% style="color:#4f81bd" %)**AT+CFGDEV **(%%)equals to send a RS485 command to sensors. This command will only run when user input it and won’t run during each sampling.
283 +When user issue an (% style="color:#4f81bd" %)**AT+CFGDEV**(%%) command, Each (% style="color:#4f81bd" %)**AT+CFGDEV**(%%) equals to send a command to the RS485 or TTL sensors. This command will only run when user input it and won’t run during each sampling.
294 294  )))
295 -)))
296 296  
297 297  (% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
298 298  |**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
... ... @@ -304,6 +304,8 @@
304 304  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
305 305  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
306 306  
296 +Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
297 +
307 307  === 3.3.3 Configure read commands for each sampling ===
308 308  
309 309  (((
... ... @@ -385,17 +385,11 @@
385 385  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
386 386  )))
387 387  
388 -(((
389 389  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.
390 -)))
391 391  
392 -(((
393 393  In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
394 -)))
395 395  
396 -(((
397 397  **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
398 -)))
399 399  
400 400  (% border="1" class="table-bordered" %)
401 401  |(((
... ... @@ -407,24 +407,26 @@
407 407  
408 408  )))
409 409  
410 -**Examples:**
395 +Examples:
411 411  
412 -~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
397 +1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
413 413  
414 414  If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
415 415  
416 -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**
401 +The valid data will be all bytes after 1E 56 34 , so it is 2e 30 58 5f 36 41 30 31 00 49
417 417  
418 -[[image:1653269403619-508.png]]
403 +[[image:1652954654347-831.png]]
419 419  
420 -2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
421 421  
406 +1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
407 +
422 422  If we set AT+SEARCH1=2, 1E 56 34+31 00 49
423 423  
424 -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**
410 +Device will search the bytes between 1E 56 34 and 31 00 49. So it is 2e 30 58 5f 36 41 30
425 425  
426 -[[image:1653269438444-278.png]]
412 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
427 427  
414 +
428 428  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
429 429  
430 430  |(((
... ... @@ -439,95 +439,94 @@
439 439  
440 440  * Grab bytes:
441 441  
442 -[[image:1653269551753-223.png||height="311" width="717"]]
429 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
443 443  
444 444  * Grab a section.
445 445  
446 -[[image:1653269568276-930.png||height="325" width="718"]]
433 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
447 447  
448 448  * Grab different sections.
449 449  
450 -[[image:1653269593172-426.png||height="303" width="725"]]
437 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
451 451  
452 -(% style="color:red" %)**Note:**
453 453  
440 +Note:
441 +
454 454  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.
455 455  
456 456  Example:
457 457  
458 -(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
446 +AT+COMMAND1=11 01 1E D0,0
459 459  
460 -(% style="color:red" %)AT+SEARCH1=1,1E 56 34
448 +AT+SEARCH1=1,1E 56 34
461 461  
462 -(% style="color:red" %)AT+DATACUT1=0,2,1~~5
450 +AT+DATACUT1=0,2,1~~5
463 463  
464 -(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
452 +Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
465 465  
466 -(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
454 +String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
467 467  
468 -(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
456 +Valid payload after DataCUT command: 2e 30 58 5f 36
469 469  
470 -[[image:1653269618463-608.png]]
458 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
471 471  
472 -=== 3.3.4 Compose the uplink payload ===
473 473  
474 -(((
461 +
462 +
463 +1.
464 +11.
465 +111. Compose the uplink payload
466 +
475 475  Through AT+COMMANDx and AT+DATACUTx we got valid value from each RS485 commands, Assume these valid value are RETURN1, RETURN2, .., to RETURNx. The next step is how to compose the LoRa Uplink Payload by these RETURNs. The command is **AT+DATAUP.**
476 -)))
477 477  
478 -(((
479 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
480 -)))
481 481  
482 -(((
483 -Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
484 -)))
470 +**Examples: AT+DATAUP=0**
485 485  
486 -(((
472 +Compose the uplink payload with value returns in sequence and send with **A SIGNLE UPLINK**.
473 +
487 487  Final Payload is
488 -)))
489 489  
490 -(((
491 -(% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
492 -)))
476 +Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx
493 493  
494 -(((
495 495  Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
496 -)))
497 497  
498 -[[image:1653269759169-150.png||height="513" width="716"]]
480 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
499 499  
500 -(% style="color:#4f81bd" %)**Examples: AT+DATAUP=1**
501 501  
502 -Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
503 503  
484 +**Examples: AT+DATAUP=1**
485 +
486 +Compose the uplink payload with value returns in sequence and send with **Multiply UPLINKs**.
487 +
504 504  Final Payload is
505 505  
506 -(% style="color:#4f81bd" %)**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
490 +Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA
507 507  
508 508  1. Battery Info (2 bytes): Battery voltage
509 509  1. PAYVER (1 byte): Defined by AT+PAYVER
510 510  1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
511 511  1. PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
512 -1. DATA: Valid value: max 6 bytes(US915 version here, Notice*!) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes
496 +1. DATA: Valid value: max 6 bytes(US915 version here, [[Notice*!>>path:#max_byte]]) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes
513 513  
514 -[[image:1653269916228-732.png||height="433" width="711"]]
498 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
515 515  
516 516  
517 517  So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
518 518  
519 -DATA1=RETURN1 Valid Value = (% style="background-color:green; color:white" %)20 20 0a 33 90 41
503 +DATA1=RETURN1 Valid Value = 20 20 0a 33 90 41
520 520  
521 -DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10=(% style="background-color:green; color:white" %) 02 aa 05 81 0a 20
505 +DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10= 02 aa 05 81 0a 20
522 522  
523 -DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 = (% style="background-color:green; color:white" %)20 20 20 2d 30
507 +DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 = 20 20 20 2d 30
524 524  
509 +
510 +
525 525  Below are the uplink payloads:
526 526  
527 -[[image:1653270130359-810.png]]
513 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]]
528 528  
529 529  
530 -(% style="color:red" %)**Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:**
516 +Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:
531 531  
532 532   ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
533 533  
... ... @@ -537,8 +537,12 @@
537 537  
538 538   ~* For all other bands: max 51 bytes for each uplink  ( so 51 -5 = 46 max valid date).
539 539  
540 -=== 3.3.5 Uplink on demand ===
541 541  
527 +
528 +1.
529 +11.
530 +111. Uplink on demand
531 +
542 542  Except uplink periodically, RS485-BL is able to uplink on demand. The server sends downlink command to RS485-BL and RS485 will uplink data base on the command.
543 543  
544 544  Downlink control command:
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