Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 19.4 >
edited by Xiaoling
on 2022/05/23 09:05
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  
... ... @@ -108,16 +108,20 @@
108 108  )))
109 109  )))
110 110  
111 -= 2. Pin mapping and Power ON Device =
111 += 2. Power ON Device =
112 112  
113 113  (((
114 -The RS485-BL is powered on by 8500mAh battery. To save battery life, RS485-BL is shipped with power off. User can put the jumper to power on RS485-BL.
115 -)))
114 +The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
116 116  
117 -[[image:1652953055962-143.png||height="387" width="728"]]
116 +* Power Source VIN to RS485-LN VIN+
117 +* Power Source GND to RS485-LN VIN-
118 118  
119 +(((
120 +Once there is power, the RS485-LN will be on.
121 +)))
119 119  
120 -The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
123 +[[image:1653268091319-405.png]]
124 +)))
121 121  
122 122  = 3. Operation Mode =
123 123  
... ... @@ -124,7 +124,7 @@
124 124  == 3.1 How it works? ==
125 125  
126 126  (((
127 -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.
128 128  )))
129 129  
130 130  == 3.2 Example to join LoRaWAN network ==
... ... @@ -131,27 +131,32 @@
131 131  
132 132  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. 
133 133  
134 -[[image:1652953414711-647.png||height="337" width="723"]]
138 +[[image:1653268155545-638.png||height="334" width="724"]]
135 135  
136 136  (((
137 -The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
138 -)))
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:
139 139  
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 +
140 140  (((
141 -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:
142 142  )))
143 143  
144 144  (((
145 -**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.
146 146  )))
147 147  
148 148  (((
149 -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:
150 150  )))
158 +)))
151 151  
152 152  [[image:1652953462722-299.png]]
153 153  
154 154  (((
163 +(((
155 155  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
156 156  )))
157 157  
... ... @@ -158,13 +158,11 @@
158 158  (((
159 159  Add APP EUI in the application.
160 160  )))
170 +)))
161 161  
162 -
163 -
164 -
165 165  [[image:image-20220519174512-1.png]]
166 166  
167 -[[image:image-20220519174512-2.png||height="328" width="731"]]
174 +[[image:image-20220519174512-2.png||height="323" width="720"]]
168 168  
169 169  [[image:image-20220519174512-3.png||height="556" width="724"]]
170 170  
... ... @@ -180,7 +180,7 @@
180 180  
181 181  
182 182  (((
183 -**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.
184 184  )))
185 185  
186 186  [[image:1652953568895-172.png||height="232" width="724"]]
... ... @@ -188,23 +188,19 @@
188 188  == 3.3 Configure Commands to read data ==
189 189  
190 190  (((
191 -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.
192 192  )))
193 193  
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 +
194 194  === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
195 195  
196 -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:
197 197  
198 -**~1. RS485-MODBUS mode:**
199 -
200 -AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
201 -
202 -**2. TTL mode:**
203 -
204 -AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
205 -
206 -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.
207 -
208 208  (% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
209 209  |(((
210 210  **AT Commands**
... ... @@ -229,13 +229,7 @@
229 229  |(((
230 230  AT+PARITY
231 231  )))|(% style="width:285px" %)(((
232 -(((
233 233  Set UART parity (for RS485 connection)
234 -)))
235 -
236 -(((
237 -Default Value is: no parity.
238 -)))
239 239  )))|(% style="width:347px" %)(((
240 240  (((
241 241  AT+PARITY=0
... ... @@ -253,7 +253,7 @@
253 253  )))
254 254  
255 255  (((
256 -Default Value is: 1bit.
253 +
257 257  )))
258 258  )))|(% style="width:347px" %)(((
259 259  (((
... ... @@ -272,12 +272,10 @@
272 272  === 3.3.2 Configure sensors ===
273 273  
274 274  (((
275 -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**.
276 -)))
277 -
278 278  (((
279 -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.
280 280  )))
275 +)))
281 281  
282 282  (% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
283 283  |**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
... ... @@ -289,8 +289,6 @@
289 289  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
290 290  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
291 291  
292 -Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
293 -
294 294  === 3.3.3 Configure read commands for each sampling ===
295 295  
296 296  (((
... ... @@ -372,11 +372,17 @@
372 372  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
373 373  )))
374 374  
368 +(((
375 375  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 +)))
376 376  
372 +(((
377 377  In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
374 +)))
378 378  
376 +(((
379 379  **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
378 +)))
380 380  
381 381  (% border="1" class="table-bordered" %)
382 382  |(((
... ... @@ -388,26 +388,24 @@
388 388  
389 389  )))
390 390  
391 -Examples:
390 +**Examples:**
392 392  
393 -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
394 394  
395 395  If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
396 396  
397 -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**
398 398  
399 -[[image:1652954654347-831.png]]
398 +[[image:1653269403619-508.png]]
400 400  
400 +2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
401 401  
402 -1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
403 -
404 404  If we set AT+SEARCH1=2, 1E 56 34+31 00 49
405 405  
406 -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**
407 407  
408 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
406 +[[image:1653269438444-278.png]]
409 409  
410 -
411 411  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
412 412  
413 413  |(((
... ... @@ -422,58 +422,63 @@
422 422  
423 423  * Grab bytes:
424 424  
425 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
422 +[[image:1653269551753-223.png||height="311" width="717"]]
426 426  
427 427  * Grab a section.
428 428  
429 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
426 +[[image:1653269568276-930.png||height="325" width="718"]]
430 430  
431 431  * Grab different sections.
432 432  
433 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
430 +[[image:1653269593172-426.png||height="303" width="725"]]
434 434  
432 +(% style="color:red" %)**Note:**
435 435  
436 -Note:
437 -
438 438  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.
439 439  
440 440  Example:
441 441  
442 -AT+COMMAND1=11 01 1E D0,0
438 +(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
443 443  
444 -AT+SEARCH1=1,1E 56 34
440 +(% style="color:red" %)AT+SEARCH1=1,1E 56 34
445 445  
446 -AT+DATACUT1=0,2,1~~5
442 +(% style="color:red" %)AT+DATACUT1=0,2,1~~5
447 447  
448 -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
449 449  
450 -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
451 451  
452 -Valid payload after DataCUT command: 2e 30 58 5f 36
448 +(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
453 453  
454 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
450 +[[image:1653269618463-608.png]]
455 455  
452 +=== 3.3.4 Compose the uplink payload ===
456 456  
457 -
458 -
459 -1.
460 -11.
461 -111. Compose the uplink payload
462 -
454 +(((
463 463  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 +)))
464 464  
458 +(((
459 +(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
460 +)))
465 465  
466 -**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 +)))
467 467  
468 -Compose the uplink payload with value returns in sequence and send with **A SIGNLE UPLINK**.
469 -
466 +(((
470 470  Final Payload is
468 +)))
471 471  
472 -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 +)))
473 473  
474 +(((
474 474  Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
476 +)))
475 475  
476 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
478 +[[image:1653269759169-150.png||height="513" width="716"]]
477 477  
478 478  
479 479  
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