Last modified by Karry Zhuang on 2025/03/06 16:34
<
From version < 19.1 >
edited by Xiaoling
on 2022/05/23 08:53
To version < 29.2 >
edited by Xiaoling
on 2022/05/23 09:37
>
Change comment: There is no comment for this version

Summary

Details

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Content
... ... @@ -14,42 +14,28 @@
14 14  
15 15  = 1.Introduction =
16 16  
17 -== 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
17 +== 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
18 18  
19 19  (((
20 -
21 -)))
22 -
23 23  (((
24 -The Dragino RS485-BL is a **RS485 / UART to LoRaWAN Converter** for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-BL converter, and configure RS485-BL to periodically read sensor data and upload via LoRaWAN network to IoT server.
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.
25 25  )))
26 26  
27 27  (((
28 -RS485-BL can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-BL provides **a 3.3v output** and** a 5v output** to power external sensors. Both output voltages are controllable to minimize the total system power consumption.
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.
29 29  )))
30 30  
31 31  (((
32 -RS485-BL is IP67 **waterproof** and powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use for several years.
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.
33 33  )))
34 34  
35 35  (((
36 -RS485-BL runs standard **LoRaWAN 1.0.3 in Class A**. It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server.
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.
37 37  )))
38 -
39 -(((
40 -For data uplink, RS485-BL sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-BL will process these returns data according to user-define rules to get the final payload and upload to LoRaWAN server.
41 41  )))
42 42  
43 -(((
44 -For data downlink, RS485-BL runs in LoRaWAN Class A. When there is downlink commands from LoRaWAN server, RS485-BL will forward the commands from LoRaWAN server to RS485 devices.
45 -)))
37 +[[image:1653267211009-519.png||height="419" width="724"]]
46 46  
47 -(((
48 -Each RS485-BL pre-load with a set of unique keys for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
49 -)))
50 -
51 -[[image:1652953304999-717.png||height="424" width="733"]]
52 -
53 53  == 1.2 Specifications ==
54 54  
55 55  **Hardware System:**
... ... @@ -57,19 +57,15 @@
57 57  * STM32L072CZT6 MCU
58 58  * SX1276/78 Wireless Chip 
59 59  * Power Consumption (exclude RS485 device):
60 -** Idle: 6uA@3.3v
46 +** Idle: 32mA@12v
61 61  
62 62  *
63 -** 20dB Transmit: 130mA@3.3v
49 +** 20dB Transmit: 65mA@12v
64 64  
65 65  **Interface for Model:**
66 66  
67 -* 1 x RS485 Interface
68 -* 1 x TTL Serial , 3.3v or 5v.
69 -* 1 x I2C Interface, 3.3v or 5v.
70 -* 1 x one wire interface
71 -* 1 x Interrupt Interface
72 -* 1 x Controllable 5V output, max
53 +* RS485
54 +* Power Input 7~~ 24V DC. 
73 73  
74 74  **LoRa Spec:**
75 75  
... ... @@ -78,27 +78,30 @@
78 78  ** Band 2 (LF): 410 ~~ 528 Mhz
79 79  * 168 dB maximum link budget.
80 80  * +20 dBm - 100 mW constant RF output vs.
63 +* +14 dBm high efficiency PA.
81 81  * Programmable bit rate up to 300 kbps.
82 82  * High sensitivity: down to -148 dBm.
83 83  * Bullet-proof front end: IIP3 = -12.5 dBm.
84 84  * Excellent blocking immunity.
68 +* Low RX current of 10.3 mA, 200 nA register retention.
85 85  * Fully integrated synthesizer with a resolution of 61 Hz.
86 -* LoRa modulation.
70 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
87 87  * Built-in bit synchronizer for clock recovery.
88 88  * Preamble detection.
89 89  * 127 dB Dynamic Range RSSI.
90 -* Automatic RF Sense and CAD with ultra-fast AFC. ​​​
74 +* Automatic RF Sense and CAD with ultra-fast AFC.
75 +* Packet engine up to 256 bytes with CRC.
91 91  
92 92  == 1.3 Features ==
93 93  
94 -* LoRaWAN Class A & Class C protocol (default Class A)
79 +* LoRaWAN Class A & Class C protocol (default Class C)
95 95  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
96 96  * AT Commands to change parameters
97 -* Remote configure parameters via LoRaWAN Downlink
82 +* Remote configure parameters via LoRa Downlink
98 98  * Firmware upgradable via program port
99 99  * Support multiply RS485 devices by flexible rules
100 100  * Support Modbus protocol
101 -* Support Interrupt uplink
86 +* Support Interrupt uplink (Since hardware version v1.2)
102 102  
103 103  == 1.4 Applications ==
104 104  
... ... @@ -111,53 +111,39 @@
111 111  
112 112  == 1.5 Firmware Change log ==
113 113  
114 -[[RS485-BL Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Firmware/||style="background-color: rgb(255, 255, 255);"]]
99 +[[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
115 115  
116 116  == 1.6 Hardware Change log ==
117 117  
118 118  (((
119 -v1.4
120 -)))
121 -
122 122  (((
123 -~1. Change Power IC to TPS22916
124 -)))
105 +v1.2: Add External Interrupt Pin.
125 125  
126 -
127 -(((
128 -v1.3
107 +v1.0: Release
129 129  )))
130 -
131 -(((
132 -~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
133 133  )))
134 134  
111 += 2. Power ON Device =
135 135  
136 136  (((
137 -v1.2
138 -)))
114 +The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
139 139  
116 +* Power Source VIN to RS485-LN VIN+
117 +* Power Source GND to RS485-LN VIN-
118 +
140 140  (((
141 -Release version ​​​​​
120 +Once there is power, the RS485-LN will be on.
142 142  )))
143 143  
144 -= 2. Pin mapping and Power ON Device =
145 -
146 -(((
147 -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.
123 +[[image:1653268091319-405.png]]
148 148  )))
149 149  
150 -[[image:1652953055962-143.png||height="387" width="728"]]
151 -
152 -
153 -The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
154 -
155 155  = 3. Operation Mode =
156 156  
157 157  == 3.1 How it works? ==
158 158  
159 159  (((
160 -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.
161 161  )))
162 162  
163 163  == 3.2 Example to join LoRaWAN network ==
... ... @@ -164,27 +164,32 @@
164 164  
165 165  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. 
166 166  
167 -[[image:1652953414711-647.png||height="337" width="723"]]
138 +[[image:1653268155545-638.png||height="334" width="724"]]
168 168  
169 169  (((
170 -The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
171 -)))
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:
172 172  
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 +
173 173  (((
174 -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:
175 175  )))
176 176  
177 177  (((
178 -**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.
179 179  )))
180 180  
181 181  (((
182 -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:
183 183  )))
158 +)))
184 184  
185 185  [[image:1652953462722-299.png]]
186 186  
187 187  (((
163 +(((
188 188  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
189 189  )))
190 190  
... ... @@ -191,13 +191,11 @@
191 191  (((
192 192  Add APP EUI in the application.
193 193  )))
170 +)))
194 194  
195 -
196 -
197 -
198 198  [[image:image-20220519174512-1.png]]
199 199  
200 -[[image:image-20220519174512-2.png||height="328" width="731"]]
174 +[[image:image-20220519174512-2.png||height="323" width="720"]]
201 201  
202 202  [[image:image-20220519174512-3.png||height="556" width="724"]]
203 203  
... ... @@ -213,7 +213,7 @@
213 213  
214 214  
215 215  (((
216 -**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.
217 217  )))
218 218  
219 219  [[image:1652953568895-172.png||height="232" width="724"]]
... ... @@ -221,23 +221,19 @@
221 221  == 3.3 Configure Commands to read data ==
222 222  
223 223  (((
224 -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.
225 225  )))
226 226  
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 +
227 227  === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
228 228  
229 -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:
230 230  
231 -**~1. RS485-MODBUS mode:**
232 -
233 -AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
234 -
235 -**2. TTL mode:**
236 -
237 -AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
238 -
239 -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.
240 -
241 241  (% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
242 242  |(((
243 243  **AT Commands**
... ... @@ -262,13 +262,7 @@
262 262  |(((
263 263  AT+PARITY
264 264  )))|(% style="width:285px" %)(((
265 -(((
266 266  Set UART parity (for RS485 connection)
267 -)))
268 -
269 -(((
270 -Default Value is: no parity.
271 -)))
272 272  )))|(% style="width:347px" %)(((
273 273  (((
274 274  AT+PARITY=0
... ... @@ -286,7 +286,7 @@
286 286  )))
287 287  
288 288  (((
289 -Default Value is: 1bit.
253 +
290 290  )))
291 291  )))|(% style="width:347px" %)(((
292 292  (((
... ... @@ -305,12 +305,10 @@
305 305  === 3.3.2 Configure sensors ===
306 306  
307 307  (((
308 -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**.
309 -)))
310 -
311 311  (((
312 -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.
313 313  )))
275 +)))
314 314  
315 315  (% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
316 316  |**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
... ... @@ -322,8 +322,6 @@
322 322  mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
323 323  )))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
324 324  
325 -Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
326 -
327 327  === 3.3.3 Configure read commands for each sampling ===
328 328  
329 329  (((
... ... @@ -405,11 +405,17 @@
405 405  **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
406 406  )))
407 407  
368 +(((
408 408  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 +)))
409 409  
372 +(((
410 410  In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
374 +)))
411 411  
376 +(((
412 412  **AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
378 +)))
413 413  
414 414  (% border="1" class="table-bordered" %)
415 415  |(((
... ... @@ -421,26 +421,24 @@
421 421  
422 422  )))
423 423  
424 -Examples:
390 +**Examples:**
425 425  
426 -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
427 427  
428 428  If we set AT+SEARCH1=1,1E 56 34.      (max 5 bytes for prefix)
429 429  
430 -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**
431 431  
432 -[[image:1652954654347-831.png]]
398 +[[image:1653269403619-508.png]]
433 433  
400 +2. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
434 434  
435 -1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
436 -
437 437  If we set AT+SEARCH1=2, 1E 56 34+31 00 49
438 438  
439 -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**
440 440  
441 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
406 +[[image:1653269438444-278.png]]
442 442  
443 -
444 444  **AT+DATACUTx : **This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
445 445  
446 446  |(((
... ... @@ -455,58 +455,63 @@
455 455  
456 456  * Grab bytes:
457 457  
458 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
422 +[[image:1653269551753-223.png||height="311" width="717"]]
459 459  
460 460  * Grab a section.
461 461  
462 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
426 +[[image:1653269568276-930.png||height="325" width="718"]]
463 463  
464 464  * Grab different sections.
465 465  
466 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
430 +[[image:1653269593172-426.png||height="303" width="725"]]
467 467  
432 +(% style="color:red" %)**Note:**
468 468  
469 -Note:
470 -
471 471  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.
472 472  
473 473  Example:
474 474  
475 -AT+COMMAND1=11 01 1E D0,0
438 +(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
476 476  
477 -AT+SEARCH1=1,1E 56 34
440 +(% style="color:red" %)AT+SEARCH1=1,1E 56 34
478 478  
479 -AT+DATACUT1=0,2,1~~5
442 +(% style="color:red" %)AT+DATACUT1=0,2,1~~5
480 480  
481 -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
482 482  
483 -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
484 484  
485 -Valid payload after DataCUT command: 2e 30 58 5f 36
448 +(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
486 486  
487 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
450 +[[image:1653269618463-608.png]]
488 488  
452 +=== 3.3.4 Compose the uplink payload ===
489 489  
490 -
491 -
492 -1.
493 -11.
494 -111. Compose the uplink payload
495 -
454 +(((
496 496  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 +)))
497 497  
458 +(((
459 +(% style="color:#4f81bd" %)**Examples: AT+DATAUP=0**
460 +)))
498 498  
499 -**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 +)))
500 500  
501 -Compose the uplink payload with value returns in sequence and send with **A SIGNLE UPLINK**.
502 -
466 +(((
503 503  Final Payload is
468 +)))
504 504  
505 -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 +)))
506 506  
474 +(((
507 507  Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
476 +)))
508 508  
509 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
478 +[[image:1653269759169-150.png]]
510 510  
511 511  
512 512  
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