Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 21.1 >
edited by Xiaoling
on 2022/05/23 09:09
To version < 29.3 >
edited by Xiaoling
on 2022/05/23 09:37
>
Change comment: There is no comment for this version

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... ... @@ -41,7 +41,7 @@
41 41  **Hardware System:**
42 42  
43 43  * STM32L072CZT6 MCU
44 -* SX1276/78 Wireless Chip
44 +* SX1276/78 Wireless Chip 
45 45  * Power Consumption (exclude RS485 device):
46 46  ** Idle: 32mA@12v
47 47  
... ... @@ -51,7 +51,7 @@
51 51  **Interface for Model:**
52 52  
53 53  * RS485
54 -* Power Input 7~~ 24V DC.
54 +* Power Input 7~~ 24V DC. 
55 55  
56 56  **LoRa Spec:**
57 57  
... ... @@ -128,7 +128,7 @@
128 128  == 3.1 How it works? ==
129 129  
130 130  (((
131 -The RS485-BL is configured as LoRaWAN OTAA Class A 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-BL. It will auto join the network via OTAA.
131 +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.
132 132  )))
133 133  
134 134  == 3.2 Example to join LoRaWAN network ==
... ... @@ -135,27 +135,32 @@
135 135  
136 136  Here shows an example for how to join the TTN V3 Network. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
137 137  
138 -[[image:1652953414711-647.png||height="337" width="723"]]
138 +[[image:1653268155545-638.png||height="334" width="724"]]
139 139  
140 140  (((
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.
142 -)))
141 +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:
143 143  
143 +485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
144 +
145 +[[image:1653268227651-549.png||height="592" width="720"]]
146 +
144 144  (((
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:
148 +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:
146 146  )))
147 147  
148 148  (((
149 -**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-BL.
152 +**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-LN.
150 150  )))
151 151  
152 152  (((
153 -Each RS485-BL is shipped with a sticker with unique device EUI:
156 +Each RS485-LN is shipped with a sticker with unique device EUI:
154 154  )))
158 +)))
155 155  
156 156  [[image:1652953462722-299.png]]
157 157  
158 158  (((
163 +(((
159 159  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
160 160  )))
161 161  
... ... @@ -162,13 +162,11 @@
162 162  (((
163 163  Add APP EUI in the application.
164 164  )))
170 +)))
165 165  
166 -
167 -
168 -
169 169  [[image:image-20220519174512-1.png]]
170 170  
171 -[[image:image-20220519174512-2.png||height="328" width="731"]]
174 +[[image:image-20220519174512-2.png||height="323" width="720"]]
172 172  
173 173  [[image:image-20220519174512-3.png||height="556" width="724"]]
174 174  
... ... @@ -184,7 +184,7 @@
184 184  
185 185  
186 186  (((
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.
190 +**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.
188 188  )))
189 189  
190 190  [[image:1652953568895-172.png||height="232" width="724"]]
... ... @@ -192,23 +192,19 @@
192 192  == 3.3 Configure Commands to read data ==
193 193  
194 194  (((
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.
198 +(((
199 +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.
196 196  )))
197 197  
202 +(((
203 +(% 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
204 +)))
205 +)))
206 +
198 198  === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
199 199  
200 -RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
209 +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:
201 201  
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 -
212 212  (% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
213 213  |(((
214 214  **AT Commands**
... ... @@ -233,13 +233,7 @@
233 233  |(((
234 234  AT+PARITY
235 235  )))|(% style="width:285px" %)(((
236 -(((
237 237  Set UART parity (for RS485 connection)
238 -)))
239 -
240 -(((
241 -Default Value is: no parity.
242 -)))
243 243  )))|(% style="width:347px" %)(((
244 244  (((
245 245  AT+PARITY=0
... ... @@ -257,7 +257,7 @@
257 257  )))
258 258  
259 259  (((
260 -Default Value is: 1bit.
253 +
261 261  )))
262 262  )))|(% style="width:347px" %)(((
263 263  (((
... ... @@ -276,12 +276,10 @@
276 276  === 3.3.2 Configure sensors ===
277 277  
278 278  (((
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 -
282 282  (((
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.
273 +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.
284 284  )))
275 +)))
285 285  
286 286  (% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
287 287  |**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
... ... @@ -293,8 +293,6 @@
293 293  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
294 294  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
295 295  
296 -Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
297 -
298 298  === 3.3.3 Configure read commands for each sampling ===
299 299  
300 300  (((
... ... @@ -376,11 +376,17 @@
376 376  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
377 377  )))
378 378  
368 +(((
379 379  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.
370 +)))
380 380  
372 +(((
381 381  In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
374 +)))
382 382  
376 +(((
383 383  **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
378 +)))
384 384  
385 385  (% border="1" class="table-bordered" %)
386 386  |(((
... ... @@ -392,26 +392,24 @@
392 392  
393 393  )))
394 394  
395 -Examples:
390 +**Examples:**
396 396  
397 -1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
392 +~1. For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
398 398  
399 399  If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
400 400  
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
396 +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**
402 402  
403 -[[image:1652954654347-831.png]]
398 +[[image:1653269403619-508.png]]
404 404  
400 +2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
405 405  
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 -
408 408  If we set AT+SEARCH1=2, 1E 56 34+31 00 49
409 409  
410 -Device will search the bytes between 1E 56 34 and 31 00 49. So it is 2e 30 58 5f 36 41 30
404 +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**
411 411  
412 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
406 +[[image:1653269438444-278.png]]
413 413  
414 -
415 415  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
416 416  
417 417  |(((
... ... @@ -426,58 +426,63 @@
426 426  
427 427  * Grab bytes:
428 428  
429 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
422 +[[image:1653269551753-223.png||height="311" width="717"]]
430 430  
431 431  * Grab a section.
432 432  
433 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
426 +[[image:1653269568276-930.png||height="325" width="718"]]
434 434  
435 435  * Grab different sections.
436 436  
437 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
430 +[[image:1653269593172-426.png||height="303" width="725"]]
438 438  
432 +(% style="color:red" %)**Note:**
439 439  
440 -Note:
441 -
442 442  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.
443 443  
444 444  Example:
445 445  
446 -AT+COMMAND1=11 01 1E D0,0
438 +(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
447 447  
448 -AT+SEARCH1=1,1E 56 34
440 +(% style="color:red" %)AT+SEARCH1=1,1E 56 34
449 449  
450 -AT+DATACUT1=0,2,1~~5
442 +(% style="color:red" %)AT+DATACUT1=0,2,1~~5
451 451  
452 -Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
444 +(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
453 453  
454 -String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
446 +(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
455 455  
456 -Valid payload after DataCUT command: 2e 30 58 5f 36
448 +(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
457 457  
458 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
450 +[[image:1653269618463-608.png]]
459 459  
452 +=== 3.3.4 Compose the uplink payload ===
460 460  
461 -
462 -
463 -1.
464 -11.
465 -111. Compose the uplink payload
466 -
454 +(((
467 467  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.**
456 +)))
468 468  
458 +(((
459 +(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
460 +)))
469 469  
470 -**Examples: AT+DATAUP=0**
462 +(((
463 +Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
464 +)))
471 471  
472 -Compose the uplink payload with value returns in sequence and send with **A SIGNLE UPLINK**.
473 -
466 +(((
474 474  Final Payload is
468 +)))
475 475  
476 -Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx
470 +(((
471 +(% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
472 +)))
477 477  
474 +(((
478 478  Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
476 +)))
479 479  
480 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
478 +[[image:1653269759169-150.png||height="513" width="716"]]
481 481  
482 482  
483 483  
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