Version 99.2 by Xiaoling on 2022/12/07 10:15
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15 **Table of Contents:**
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17 {{toc/}}
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22 (% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
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30
31 = 1. Introduction =
32
33 == 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
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36 (((
37 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.
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41 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.
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45 (% 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.
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49 (% 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.
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53 (% 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]]
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57 (% aria-label="1653267211009-519.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653267211009-519.png||data-widget="image" height="419" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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59
60 == 1.2 Specifications ==
61
62
63 (% style="color:#037691" %)**Hardware System:**
64
65 * STM32L072xxxx MCU
66 * SX1276/78 Wireless Chip 
67 * Power Consumption (exclude RS485 device):
68 ** Idle: 32mA@12v
69 ** 20dB Transmit: 65mA@12v
70
71 (% style="color:#037691" %)**Interface for Model:**
72
73 * RS485
74 * Power Input 7~~ 24V DC. 
75
76 (% style="color:#037691" %)**LoRa Spec:**
77
78 * Frequency Range:
79 ** Band 1 (HF): 862 ~~ 1020 Mhz
80 ** Band 2 (LF): 410 ~~ 528 Mhz
81 * 168 dB maximum link budget.
82 * +20 dBm - 100 mW constant RF output vs.
83 * +14 dBm high efficiency PA.
84 * Programmable bit rate up to 300 kbps.
85 * High sensitivity: down to -148 dBm.
86 * Bullet-proof front end: IIP3 = -12.5 dBm.
87 * Excellent blocking immunity.
88 * Low RX current of 10.3 mA, 200 nA register retention.
89 * Fully integrated synthesizer with a resolution of 61 Hz.
90 * FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
91 * Built-in bit synchronizer for clock recovery.
92 * Preamble detection.
93 * 127 dB Dynamic Range RSSI.
94 * Automatic RF Sense and CAD with ultra-fast AFC.
95 * Packet engine up to 256 bytes with CRC
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97
98
99 == 1.3 Features ==
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101
102 * LoRaWAN Class A & Class C protocol (default Class C)
103 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864/MA869
104 * AT Commands to change parameters
105 * Remote configure parameters via LoRa Downlink
106 * Firmware upgradable via program port
107 * Support multiply RS485 devices by flexible rules
108 * Support Modbus protocol
109 * Support Interrupt uplink (Since hardware version v1.2)
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111
112
113 == 1.4 Applications ==
114
115
116 * Smart Buildings & Home Automation
117 * Logistics and Supply Chain Management
118 * Smart Metering
119 * Smart Agriculture
120 * Smart Cities
121 * Smart Factory
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123
124
125 == 1.5 Firmware Change log ==
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127
128 [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
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131
132 == 1.6 Hardware Change log ==
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138 v1.2: Add External Interrupt Pin.
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142 v1.0: Release
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148
149 = 2. Power ON Device =
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153 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
154
155 * Power Source VIN to RS485-LN VIN+
156 * Power Source GND to RS485-LN VIN-
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159 Once there is power, the RS485-LN will be on.
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166
167 = 3. Operation Mode =
168
169 == 3.1 How it works? ==
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173 (((
174 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.
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179
180 == 3.2 Example to join LoRaWAN network ==
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183 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. 
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186 (% aria-label="1653268155545-638.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268155545-638.png||data-widget="image" height="334" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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191 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:
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195 485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
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200 (% aria-label="1653268227651-549.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268227651-549.png||data-widget="image" height="592" width="720"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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204 The LG308 is already set to connect to [[TTN V3 network >>path:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
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210 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from RS485-LN.
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214 Each RS485-LN is shipped with a sticker with unique device EUI:
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223 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
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229 **Add APP EUI in the application.**
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237 (% aria-label="image-20220519174512-3.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-3.png||data-widget="image" height="556" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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239 (% aria-label="image-20220519174512-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-4.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
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242 (% title="Click and drag to resize" %)​
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244 You can also choose to create the device manually.
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246 (% aria-label="1652953542269-423.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953542269-423.png||data-widget="image" height="710" width="723"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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250 **Add APP KEY and DEV EUI**
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252 (% aria-label="1652953553383-907.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953553383-907.png||data-widget="image" height="514" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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257 (% style="color:blue" %)**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.
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262 (% aria-label="1652953568895-172.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953568895-172.png||data-widget="image" height="232" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
263
264
265 == 3.3 Configure Commands to read data ==
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267
268 (((
269 (((
270 (((
271 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>>||anchor="H3.5ConfigureRS485-LNviaATorDownlink"]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
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279 (% 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**
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285
286 === 3.3.1 Configure UART settings for RS485 or TTL communication ===
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289 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:
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292 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
293 |=(% style="width: 110px;" %)(((
294 **AT Commands**
295 )))|=(% style="width: 210px;" %)(((
296 **Description**
297 )))|=(% style="width: 190px;" %)(((
298 **Example**
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300 |(% style="width:110px" %)(((
301 AT+BAUDR
302 )))|(% style="width:190px" %)(((
303 Set the baud rate (for RS485 connection). Default Value is: 9600.
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305 (((
306 AT+BAUDR=9600
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309 (((
310 Options: (1200,2400,4800,14400,19200,115200)
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314 AT+PARITY
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316 Set UART parity (for RS485 connection)
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319 AT+PARITY=0
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323 Option: 0: no parity, 1: odd parity, 2: even parity
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326 |(% style="width:110px" %)(((
327 AT+STOPBIT
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330 Set serial stopbit (for RS485 connection)
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338 AT+STOPBIT=0 for 1bit
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342 AT+STOPBIT=1 for 1.5 bit
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346 AT+STOPBIT=2 for 2 bits
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350
351
352 === 3.3.2 Configure sensors ===
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357 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.
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363 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
364 |=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 210px;" %)**Description**|=(% style="width: 190px;" %)**Example**
365 |AT+CFGDEV|(% style="width:110px" %)(((
366 (((
367 This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
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370 (((
371 AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
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374 (((
375 mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
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377 )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
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379
380
381 === 3.3.3 Configure read commands for each sampling ===
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384 (((
385 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.
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387 To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
388
389 This section describes how to achieve above goals.
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391 During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
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393
394 (% style="color:#037691" %)**Each RS485 commands include two parts:**
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396
397 ~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.
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399 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.
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401 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 **AT+CMDDL1=1000** to send the open time to 1000ms
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404 After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
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406 Below are examples for the how above AT Commands works.
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408
409 (% style="color:#037691" %)**AT+COMMANDx **(%%)**: **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:
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411 (% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
412 |(% style="width:496px" %)(((
413 **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
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415 **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
416
417 **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
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419
420 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.
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422 In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
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424
425 (% style="color:#037691" %)**AT+DATACUTx **(%%)**: **This command defines how to handle the return from AT+COMMANDx, max return length is 100 bytes.
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427 (% border="1" style="background-color:#4bacc6; color:white; width:510px" %)
428 |(% style="width:510px" %)(((
429 **AT+DATACUTx=a,b,c**
430
431 * **a: length for the return of AT+COMMAND**
432 * **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
433 * **c: define the position for valid value.  **
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435
436 **Examples:**
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439 * (% style="color:#037691" %)**Grab bytes**
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441 (% aria-label="image-20220602153621-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-1.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
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445 * (% style="color:#037691" %)**Grab a section**
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449
450
451 * (% style="color:#037691" %)**Grab different sections**
452
453 (% aria-label="image-20220602153621-3.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-3.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
454
455
456 )))
457
458 === 3.3.4 Compose the uplink payload ===
459
460
461 (((
462 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.**
463
464
465 )))
466
467 (((
468 (% style="color:#037691" %)**Examples: AT+DATAUP=0**
469
470
471 )))
472
473 (((
474 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
475 )))
476
477 (((
478 Final Payload is (% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
479 )))
480
481 (((
482 Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
483
484
485 )))
486
487 [[image:image-20220929111027-1.png||height="509" width="685"]](% title="Click and drag to resize" %)​
488
489
490 (% style="color:#037691" %)**Examples: AT+DATAUP=1**
491
492
493 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
494
495 Final Payload is (% style="color:#4f81bd" %)**PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
496
497
498 ~1. PAYVER: Defined by AT+PAYVER
499
500 2. PAYLOAD COUNT: Total how many uplinks of this sampling.
501
502 3. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
503
504 4. DATA: Valid value: max 8 bytes for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 8 bytes
505
506
507 (% aria-label="image-20220602155039-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602155039-4.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
508
509
510 So totally there will be 3 uplinks for this sampling, each uplink include 8 bytes DATA
511
512 DATA1=RETURN1 Valid Value + the first two of Valid value of RETURN10= **20 20 0a 33 90 41 02 aa**
513
514 DATA2=3^^rd^^ ~~ 10^^th^^ byte of Valid value of RETURN10= **05 81 0a 20 20 20 20 2d**
515
516 DATA3=the rest of Valid value of RETURN10= **30**
517
518
519 (% style="color:red" %)**Notice: In firmware v1.3, the Max bytes has been changed according to the max bytes in different Frequency Bands for lowest SF. As below:**
520
521
522 ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.
523
524 * For AU915/AS923 bands, if UplinkDwell time=0, max 11 bytes for each uplink.
525
526 * For US915 band, max 11 bytes for each uplink.
527
528 ~* For all other bands: max 51 bytes for each uplink.
529
530
531 (% style="color:red" %)** When AT+DATAUP=1, the maximum number of segments is 15, and the maximum total number of bytes is 1500;**
532
533 (% style="color:red" %)** When AT+DATAUP=1 and AT+ADR=0, the maximum number of bytes of each payload is determined by the DR value. (Since v1.4.0)**
534
535
536
537 Below are the uplink payloads:
538
539
540 (% aria-label="1654157178836-407.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654157178836-407.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
541
542
543 === 3.3.5 Uplink on demand ===
544
545
546 Except uplink periodically, RS485-LN is able to uplink on demand. The server send downlink command to RS485-LN and RS485 will uplink data base on the command.
547
548 (% style="color:blue" %)**Downlink control command:**
549
550 (% style="color:#4472c4" %)** 0x08 command**(%%): Poll an uplink with current command set in RS485-LN.
551
552 (% style="color:#4472c4" %)** 0xA8 command**(%%): Send a command to RS485-LN and uplink the output from sensors.
553
554
555 === 3.3.6 Uplink on Interrupt ===
556
557
558 RS485-LN support external Interrupt uplink since hardware v1.2 release.
559
560
561 (% aria-label="1654157342174-798.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654157342174-798.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
562
563 Connect the Interrupt pin to RS485-LN INT port and connect the GND pin to V- port. When there is a high voltage (Max 24v) on INT pin. Device will send an uplink packet.
564
565
566 == 3.4 Uplink Payload ==
567
568
569 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
570 |=(% scope="row" style="width: 60px;" %)(((
571 Size(bytes)
572 )))|(% style="width:80px" %)1|(% style="width:360px" %)(((
573 Length depends on the return from the commands
574 )))
575 |=(% style="width: 90px;" %)(((
576 Value
577 )))|(% style="width:114px" %)(((
578 PAYLOAD_VER
579 )))|(% style="width:353px" %)(((
580 If the valid payload is too long and exceed the maximum
581
582 support payload length in server, server will show payload not
583
584 provided in the LoRaWAN server.
585 )))
586
587 (% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
588
589 (% title="Click and drag to resize" %)​
590
591 Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
592
593
594 == 3.5 Configure RS485-LN via AT or Downlink ==
595
596
597 (((
598 User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
599 )))
600
601 (((
602 There are two kinds of Commands:
603 )))
604
605 * (((
606 (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
607 )))
608
609 * (((
610 (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-LN.  User can see these commands below:
611 )))
612
613 (((
614
615 )))
616
617
618 === 3.5.1 Common Commands ===
619
620
621 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: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
622
623
624 === 3.5.2 Downlink Response(Since firmware v1.4) ===
625
626
627 Response feature is added to the server's downlink, a special package with a FPort of 200 will be uploaded immediately after receiving the data sent by the server.
628
629
630 (% aria-label="image-20220602163333-5.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602163333-5.png||data-widget="image" height="263" width="1160"]]
631
632 (% title="Click and drag to resize" %)​
633
634 The first byte of this package represents whether the configuration is successful, 00 represents failure, 01 represents success. Except for the first byte, the other is the previous downlink. (All commands except A8 type commands are applicable)
635
636
637 === 3.5.3 Sensor related commands ===
638
639
640
641 ==== (% style="color:blue" %)**RS485 Debug Command**(%%) ====
642
643
644 (((
645 This command is used to configure the RS485 devices; they won't be used during sampling. Max Length of AT+CFGDEV is **40 bytes**.
646 )))
647
648 (((
649 * (% style="color:#037691" %)**AT Command**
650
651 (((
652 (% style="color:#4472c4" %)** AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m**  (%%) m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
653 )))
654 )))
655
656 (((
657
658 )))
659
660 * (((
661 (% style="color:#037691" %)**Downlink Payload**
662 )))
663
664 (((
665 Format: (% style="color:#4472c4" %)** A8 MM NN XX XX XX XX YY**
666 )))
667
668 (((
669 Where:
670 )))
671
672 * (((
673 MM: 1: add CRC-16/MODBUS ; 0: no CRC
674 )))
675 * (((
676 NN: The length of RS485 command
677 )))
678 * (((
679 XX XX XX XX: RS485 command total NN bytes
680 )))
681 * (((
682 (((
683 YY: How many bytes will be uplink from the return of this RS485 command,
684 )))
685
686 * (((
687 if YY=0, RS485-LN will execute the downlink command without uplink;
688 )))
689 * (((
690 if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
691 )))
692 * (((
693 if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
694 )))
695 )))
696
697 (((
698
699
700 (% style="color:blue" %)**Example 1:**  (%%) ~-~-> Configure without ask for uplink (YY=0)
701 )))
702
703 (((
704 To connect a Modbus Alarm with below commands.
705 )))
706
707 * (((
708 The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.
709 )))
710
711 * (((
712 The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.
713 )))
714
715 (((
716
717
718 So if user want to use downlink command to control to RS485 Alarm, he can use:
719 )))
720
721 (((
722 (% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
723 )))
724
725 (((
726 (% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
727 )))
728
729 (((
730 A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.
731 )))
732
733 (((
734
735 )))
736
737 (((
738 (% style="color:blue" %)**Example 2:**  (%%) ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
739 )))
740
741 (((
742 User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
743 )))
744
745 (((
746
747 )))
748
749 (((
750 (((
751 RS485-LN got this downlink command and send (% style="color:#4f81bd" %)**0A 08 00 04 00 01 **(%%)to Modbus network. One of the RS485 sensor in the network send back Modbus reply **0A 08 00 04 00 00**. RS485-LN get this reply and combine with the original downlink command and uplink. The uplink message is:  **A8** (% style="color:#4f81bd" %)**0A 08 00 04 00  **(% style="color:red" %)**01 06** ** **(% style="color:green" %)**0A 08 00 04 00 00**
752 )))
753
754
755 )))
756
757 (((
758 (% aria-label="1654159460680-153.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654159460680-153.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
759 )))
760
761
762
763 ==== (% style="color:blue" %)**Set Payload version**(%%) ====
764
765
766 (((
767 This is the first byte of the uplink payload. RS485-LN can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
768 )))
769
770 (((
771 * (% style="color:#037691" %)**AT Command:**
772
773 (% style="color:#4472c4" %)** AT+PAYVER:    ** (%%) Set PAYVER field = 1
774
775
776 )))
777
778 * (((
779 (% style="color:#037691" %)**Downlink Payload:**
780 )))
781
782 (((
783 (% style="color:#4472c4" %)** 0xAE 01** (%%) ~-~->  Set PAYVER field =  0x01
784 )))
785
786 (((
787 (% style="color:#4472c4" %)** 0xAE 0F**   (%%) ~-~->  Set PAYVER field =  0x0F
788 )))
789
790
791 **1 )  Add the interrupt flag at the highest bit of the Payver byte, that is, Byte7 of the first byte. (Since v1.4.0)**
792
793
794 [[image:image-20220824145428-2.png||height="168" width="1300"]]
795
796
797
798 **2 )  if the data intercepted by AT+DATACUT or AT+MBFUN is empty, it will display NULL, and the payload will be filled with n FFs.**
799
800
801 [[image:image-20220824145428-3.png||height="308" width="1200"]]
802
803
804
805 ==== (% style="color:blue" %)**Set RS485 Sampling Commands**(%%) ====
806
807
808 (((
809 AT+COMMANDx or AT+DATACUTx
810 )))
811
812 (((
813 These three commands are used to configure how the RS485-LN polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
814 )))
815
816 (((
817
818 )))
819
820 * (((
821 (% style="color:#037691" %)**AT Command:**
822 )))
823
824 (% style="color:#4472c4" %)** AT+COMMANDx:    ** (%%) Configure RS485 read command to sensor.
825
826 (% style="color:#4472c4" %)** AT+DATACUTx:        **(%%) Configure how to handle return from RS485 devices.
827
828
829 * (((
830 (% style="color:#037691" %)**Downlink Payload:**
831 )))
832
833 (((
834 (% style="color:#4472c4" %)** 0xAF**(%%) downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
835
836
837 )))
838
839 (((
840 (% style="color:red" %)**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
841
842
843 )))
844
845 (((
846 Format: (% style="color:#4472c4" %)** AF MM NN LL XX XX XX XX YY**
847 )))
848
849 (((
850 Where:
851 )))
852
853 * (((
854 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
855 )))
856 * (((
857 NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
858 )))
859 * (((
860 LL:  The length of AT+COMMAND or AT+DATACUT command
861 )))
862 * (((
863 XX XX XX XX: AT+COMMAND or AT+DATACUT command
864 )))
865 * (((
866 YY:  If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.
867 )))
868
869 (((
870
871
872 **Example:**
873 )))
874
875 (((
876 (% style="color:#037691" %)**AF 03 01 06 0A 05 00 04 00 01 00**(%%): Same as AT+COMMAND3=0A 05 00 04 00 01,1
877 )))
878
879 (((
880 (% style="color:#037691" %)**AF 03 02 06**(% style="color:orange" %)** 10 **(% style="color:red" %)**01 **(% style="color:green" %)**05 06 09 0A**(% style="color:#037691" %)** 00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**16**(%%),(% style="color:red" %)**1**(%%),(% style="color:green" %)**5+6+9+10**
881 )))
882
883 (((
884 (% style="color:#037691" %)**AF 03 02 06 **(% style="color:orange" %)**0B**(% style="color:red" %)** 02 **(% style="color:green" %)**05 07 08 0A **(% style="color:#037691" %)**00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**11**(%%),(% style="color:red" %)**2**(%%),(% style="color:green" %)**5~~7+8~~10**
885 )))
886
887
888
889 ==== (% style="color:blue" %)**Fast command to handle MODBUS device**(%%) ====
890
891
892 (((
893 (% style="color:#4472c4" %)** AT+MBFUN**(%%) is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
894 )))
895
896 (((
897 This command is valid since v1.3 firmware version
898 )))
899
900 (((
901 AT+MBFUN can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
902 )))
903
904 (((
905
906 )))
907
908 (((
909 **Example:**
910 )))
911
912 * (((
913 AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2  are not configure (0,0,0). So RS485-LN.
914 )))
915 * (((
916 AT+COMMAND1= 01 03 00 10 00 08,1  ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
917 )))
918 * (((
919 AT+COMMAND2= 01 02 00 40 00 10,1  ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
920
921
922 )))
923
924 (% aria-label="image-20220602165351-6.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602165351-6.png||data-widget="image"]]
925
926 (% title="Click and drag to resize" %)​
927
928 (% aria-label="image-20220602165351-7.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602165351-7.png||data-widget="image"]](% title="Click and drag to resize" %)​
929
930
931
932 ==== (% style="color:blue" %)**RS485 command timeout**(%%) ====
933
934
935 (((
936 Some Modbus device has slow action to send replies. This command is used to configure the RS485-LN to use longer time to wait for their action.
937 )))
938
939 (((
940 Default value: 0, range:  0 ~~ 65 seconds
941 )))
942
943 (((
944 * (% style="color:#037691" %)** AT Command:**
945
946 (% style="color:#4472c4" %)** AT+CMDDLaa=hex(bb cc)*1000**
947 )))
948
949 (((
950
951
952 **Example:**
953 )))
954
955 (((
956 (% style="color:#4472c4" %)** AT+CMDDL1=1000** (%%)to send the open time to 1000ms
957 )))
958
959 (((
960
961 )))
962
963 * (((
964 (% style="color:#037691" %)** Downlink Payload:**
965 )))
966
967 (((
968 (% style="color:#4472c4" %)** 0x AA aa bb cc**(%%) Same as: AT+CMDDLaa=hex(bb cc)*1000
969 )))
970
971 (((
972
973
974 **Example:**
975 )))
976
977 (((
978 **0xAA 01 00 01**  ~-~-> Same as  **AT+CMDDL1=1000 ms**
979 )))
980
981
982
983 ==== (% style="color:blue" %)**Uplink payload mode**(%%) ====
984
985
986 (((
987 Define to use one uplink or multiple uplinks for the sampling.
988 )))
989
990 (((
991 The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]
992
993
994 )))
995
996 (((
997 * (% style="color:#037691" %)** AT Command:**
998
999 (% style="color:#4472c4" %)** AT+DATAUP=0**
1000
1001 (% style="color:#4472c4" %)** AT+DATAUP=1**
1002
1003
1004 )))
1005
1006 (% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000  ~/~/  (00 00 14 is 20 seconds)
1007
1008 Each uplink is sent to the server at 20-second intervals when segmented.
1009
1010
1011 * (((
1012 (% style="color:#037691" %)** Downlink Payload:**
1013 )))
1014
1015 (% style="color:#4472c4" %)** 0xAD 00** (%%) **~-~->** Same as AT+DATAUP=0
1016
1017 (% style="color:#4472c4" %)** 0xAD 01**  (%%) **~-~->** Same as AT+DATAUP=1  ~/~/Each uplink is sent to the server one after the other as it is segmented.
1018
1019
1020 * (((
1021 (% style="color:#037691" %)** AT Command:**
1022 )))
1023
1024 (% style="color:#4472c4" %)** AT+DATAUP=1,Timeout**
1025
1026
1027 * (((
1028 (% style="color:#037691" %)** Downlink Payload:**
1029 )))
1030
1031 (% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000  ~/~/  (00 00 14 is 20 seconds)
1032
1033 Each uplink is sent to the server at 20-second intervals when segmented.
1034
1035
1036
1037 ==== (% style="color:blue" %)**Manually trigger an Uplink**(%%) ====
1038
1039
1040 (((
1041 Ask device to send an uplink immediately.
1042 )))
1043
1044 * (((
1045 (% style="color:#037691" %)** AT Command:**
1046 )))
1047
1048 (((
1049 No AT Command for this, user can press the [[ACT button>>||anchor="H3.7Buttons"]] for 1 second for the same.
1050 )))
1051
1052 (((
1053
1054 )))
1055
1056 * (((
1057 (% style="color:#037691" %)** Downlink Payload:**
1058 )))
1059
1060 (((
1061 (% style="color:#4472c4" %)** 0x08 FF**(%%), RS485-LN will immediately send an uplink.
1062 )))
1063
1064
1065
1066 ==== (% style="color:blue" %)**Clear RS485 Command**(%%) ====
1067
1068
1069 (((
1070 The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
1071
1072
1073 )))
1074
1075 * (((
1076 (% style="color:#037691" %)** AT Command:**
1077 )))
1078
1079 (((
1080 (% style="color:#4472c4" %)** AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase
1081 )))
1082
1083 (((
1084
1085
1086 Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
1087 )))
1088
1089 (((
1090 Example screen shot after clear all RS485 commands. 
1091 )))
1092
1093 (((
1094
1095 )))
1096
1097 (((
1098 The uplink screen shot is:
1099 )))
1100
1101 (% aria-label="1654160691922-496.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654160691922-496.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1102
1103
1104 * (((
1105 (% style="color:#037691" %)** Downlink Payload:**
1106 )))
1107
1108 (((
1109 (% style="color:#4472c4" %)** 0x09 aa bb** (%%) same as AT+CMDEAR=aa,bb
1110 )))
1111
1112
1113
1114 ==== (% style="color:blue" %)**Set Serial Communication Parameters**(%%) ====
1115
1116
1117 (((
1118 Set the Rs485 serial communication parameters:
1119 )))
1120
1121 (((
1122 (% style="color:#037691" %)**AT Command:**
1123 )))
1124
1125 (((
1126 * Set Baud Rate
1127 )))
1128
1129 (% style="color:#4472c4" %)** AT+BAUDR=9600** (%%) ~/~/  Options: (200~~115200)  When using low baud rate or receiving multiple bytes, you need to use AT+CMDDL to increase the receive timeout (the default receive timeout is 400ms), otherwise data will be lost
1130
1131
1132 (((
1133 * Set UART Parity
1134 )))
1135
1136 (% style="color:#4472c4" %)** AT+PARITY=0** (%%) ~/~/  Option: 0: no parity, 1: odd parity, 2: even parity
1137
1138
1139 (((
1140 * Set STOPBIT
1141 )))
1142
1143 (% style="color:#4472c4" %)** AT+STOPBIT=0** (%%) ~/~/  Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1144
1145
1146 (((
1147 (% style="color:#037691" %)**Downlink Payload:**
1148 )))
1149
1150 (((
1151 (% style="color:#4472c4" %)** A7 01 aa bb**:   (%%) Same  AT+BAUDR=hex(aa bb)*100
1152 )))
1153
1154 (((
1155 **Example:**
1156 )))
1157
1158 * (((
1159 A7 01 00 60  same as AT+BAUDR=9600
1160 )))
1161 * (((
1162 A7 01 04 80  same as AT+BAUDR=115200
1163 )))
1164
1165 (((
1166 * A7 02 aa:  Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1167 )))
1168
1169 (((
1170 * A7 03 aa:  Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1171 )))
1172
1173
1174
1175
1176 ==== (% style="color:blue" %)**Configure Databit (Since Version 1.4.0)**(%%) ====
1177
1178
1179 * (((
1180 (% style="color:#037691" %)** AT Command:**
1181 )))
1182
1183 (% style="color:#4472c4" %)** AT+DATABIT=7    **(%%)~/~/ Set the data bits to 7
1184
1185 (% style="color:#4472c4" %)** AT+DATABIT=8    **(%%)~/~/ Set the data bits to 8
1186
1187 * (((
1188 (% style="color:#037691" %)**Downlink Payload:**
1189 )))
1190
1191 (% style="color:#4472c4" %)** A7 04 07**(%%): Same as  AT+DATABIT=7
1192
1193 (% style="color:#4472c4" %)** A7 04 08**(%%): Same as  AT+DATABIT=8
1194
1195
1196
1197 ==== (% style="color:blue" %)**Encrypted payload**(%%) ====
1198
1199 (((
1200
1201 )))
1202
1203 * (((
1204 (% style="color:#037691" %)** AT Command:**
1205 )))
1206
1207 (% style="color:#4472c4" %)** AT+DECRYPT=1  ** (%%) ~/~/ The payload is uploaded without encryption
1208
1209 (% style="color:#4472c4" %)** AT+DECRYPT=0  ** (%%) ~/~/ Encrypt when uploading payload (default)
1210
1211
1212
1213 ==== (% style="color:blue" %)**Get sensor value**(%%) ====
1214
1215
1216 * (((
1217 (% style="color:#037691" %)** AT Command:**
1218 )))
1219
1220 (% style="color:#4472c4" %)** AT+GETSENSORVALUE=0  **(%%) ~/~/ The serial port gets the reading of the current sensor
1221
1222 (% style="color:#4472c4" %)** AT+GETSENSORVALUE=1  **(%%) ~/~/ The serial port gets the current sensor reading and uploads it.
1223
1224
1225
1226 ==== (% style="color:blue" %)**Resets the downlink packet count**(%%) ====
1227
1228
1229 * (((
1230 (% style="color:#037691" %)** AT Command:**
1231 )))
1232
1233 (% style="color:#4472c4" %)** AT+DISFCNTCHECK=0  **(%%) ~/~/  When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)
1234
1235 (% style="color:#4472c4" %)** AT+DISFCNTCHECK=1  **(%%) ~/~/  When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.
1236
1237
1238
1239 ==== (% style="color:blue" %)**When the limit bytes are exceeded, upload in batches**(%%) ====
1240
1241
1242 * (((
1243 (% style="color:#037691" %)** AT Command:**
1244 )))
1245
1246 (% style="color:#4472c4" %)** AT+DISMACANS=0**  (%%) ~/~/  When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)
1247
1248 (% style="color:#4472c4" %)** AT+DISMACANS=1**   (%%) ~/~/  When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.
1249
1250
1251 * (((
1252 (% style="color:#037691" %)** Downlink Payload:**
1253 )))
1254
1255 (% style="color:#4472c4" %)** 0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1256
1257
1258
1259 ==== (% style="color:blue" %)** Copy downlink to uplink **(%%) ====
1260
1261
1262 * (((
1263 (% style="color:#037691" %)** AT Command:**
1264 )))
1265
1266 (% style="color:#4472c4" %)** AT+RPL=5**  (%%) ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1267
1268 Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1269
1270
1271 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1272
1273 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1274
1275
1276
1277 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1278
1279 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1280
1281
1282
1283 ==== (% style="color:blue" %)**Query version number and frequency band 、TDC**(%%) ====
1284
1285
1286 (((
1287 * (% style="color:#037691" %)**Downlink Payload:**
1288
1289 (% style="color:#4472c4" %)** 26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1290 )))
1291
1292
1293 Example：
1294
1295
1296 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1297
1298
1299
1300 ==== (% style="color:blue" %)** Monitor RS485 communication of other devices**(%%) ====
1301
1302
1303 * (((
1304 (% style="color:#037691" %)** AT Command:**
1305 )))
1306
1307 (% style="color:#4472c4" %)**AT+RXMODE=1,10**    (%%) ~/~/ When the RS485-LN receives more than 10 bytes from the RS485, it immediately sends the uplink of the received data.
1308
1309 (% style="color:#4472c4" %)**AT+RXMODE=2,500    ** (%%) ~/~/  RS485-LN uploads data as uplink from the first byte received by RS485 to the data received within 500ms after that.
1310
1311 (% style="color:#4472c4" %)**AT+RXMODE=0,0  ** (%%) ~/~/  Disable this mode (default)
1312
1313
1314 * (((
1315 (% style="color:#037691" %)**Downlink Payload:**
1316 )))
1317
1318 (% style="color:#4472c4" %)** A6 aa bb bb               ** (%%) ~/~/ same as AT+RXMODE=aa,bb
1319
1320 [[image:image-20220824144240-1.png]]
1321
1322
1323 == 3.6 Listening mode for RS485 network ==
1324
1325
1326 (((
1327 This feature support since firmware v1.4
1328 )))
1329
1330 (((
1331 RS485-LN supports listening mode, it can listen the RS485 network packets and send them via LoRaWAN uplink. Below is the structure. The blue arrow shows the RS485 network packets to RS485-LN.
1332
1333
1334 )))
1335
1336 (% aria-label="image-20220602171200-8.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602171200-8.png||data-widget="image" height="567" width="1007"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
1337
1338 (% title="Click and drag to resize" %)​
1339
1340 (((
1341 To enable the listening mode, use can run the command (% style="color:#4472c4" %)** AT+RXMODE**.
1342 )))
1343
1344 (((
1345
1346 )))
1347
1348 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1349 |=(% style="width: 100px;" %)(((
1350 **Command example**
1351 )))|=(% style="width: 400px;" %)(((
1352 **Function**
1353 )))
1354 |(% style="width:100px" %)(((
1355 AT+RXMODE=1,10
1356 )))|(% style="width:400px" %)(((
1357 Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.
1358 )))
1359 |(% style="width:100px" %)(((
1360 AT+RXMODE=2,500
1361 )))|(% style="width:400px" %)(((
1362 Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms
1363 )))
1364 |(% style="width:100px" %)(((
1365 AT+RXMODE=0,0
1366 )))|(% style="width:400px" %)(((
1367 Disable listening mode. This is the default settings.
1368 )))
1369 |(% style="width:100px" %)(((
1370
1371 )))|(% style="width:400px" %)(((
1372 A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
1373 )))
1374
1375 (((
1376
1377
1378 (% style="color:#037691" %)**Downlink Command:**
1379 )))
1380
1381 (((
1382 (% style="color:#4472c4" %)** 0xA6 aa bb cc **(%%) same as AT+RXMODE=aa,(bb<<8 | cc)
1383 )))
1384
1385 (((
1386
1387 )))
1388
1389 (((
1390 **Example**:
1391 )))
1392
1393 (((
1394 The RS485-LN is set to AT+RXMODE=2,1000
1395 )))
1396
1397 (((
1398 There is a two Modbus commands in the RS485 network as below:
1399 )))
1400
1401 (((
1402 The Modbus master send a command: (% style="background-color:#ffc000" %)**01 03 00 00 00 02 c4 0b**
1403 )))
1404
1405 (((
1406 And Modbus slave reply with: (% style="background-color:green" %)**01 03 04 00 00 00 00 fa 33**
1407 )))
1408
1409 (((
1410 RS485-LN will capture both and send the uplink: (% style="background-color:#ffc000" %)**01 03 00 00 00 02 c4 0b  **(% style="background-color:green" %)**01 03 04 00 00 00 00 fa 33**
1411
1412
1413 )))
1414
1415 (((
1416 (% aria-label="image-20220602171200-9.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602171200-9.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1417 )))
1418
1419 (((
1420
1421 )))
1422
1423 (((
1424 (((
1425 (% style="color:red" %)**Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.**
1426 )))
1427 )))
1428
1429
1430 == 3.7 Buttons ==
1431
1432
1433 (% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1434 |=(% style="width: 50px;" %)**Button**|=(% style="width: 380px;" %)**Feature**
1435 |(% style="width:50px" %)**ACT**|(% style="width:361px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**
1436 |(% style="width:50px" %)**RST**|(% style="width:361px" %)Reboot RS485
1437 |(% style="width:50px" %)**PRO**|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1438
1439
1440
1441 == 3.8 LEDs ==
1442
1443
1444 (% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1445 |=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
1446 |**PWR**|Always on if there is power
1447 |**SYS**|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN**(%%) for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds** (%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.
1448
1449
1450
1451 = 4. Case Study =
1452
1453
1454 User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]
1455
1456
1457 = 5. Use AT Command =
1458
1459 == 5.1 Access AT Command ==
1460
1461
1462 (((
1463 RS485-LN supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-LN to use AT command, as below.
1464
1465
1466 )))
1467
1468 (% aria-label="1654162355560-817.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162355560-817.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1469
1470
1471
1472 (((
1473 In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-LN. The default password is 123456. Below is the output for reference:
1474
1475
1476 )))
1477
1478 (% aria-label="1654162368066-342.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162368066-342.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1479
1480
1481 (((
1482 More detail AT Command manual can be found at [[AT Command Manual>>https://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1483 )))
1484
1485
1486 == 5.2 Common AT Command Sequence ==
1487
1488 === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1489
1490
1491 If device has not joined network yet:
1492
1493 * (% style="color:#037691" %)**AT+FDR**
1494 * (% style="color:#037691" %)**AT+NJM=0**
1495 * (% style="color:#037691" %)**ATZ**
1496
1497 (((
1498
1499
1500 If device already joined network:
1501
1502 * (% style="color:#037691" %)**AT+NJM=0**
1503 * (% style="color:#037691" %)**ATZ**
1504 )))
1505
1506
1507
1508 === 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
1509
1510
1511 (% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
1512
1513 (% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%) Set to ABP mode
1514
1515 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) Set the Adaptive Data Rate Off
1516
1517 (% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%) Set Data Rate
1518
1519 (% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
1520
1521 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%)  Set transmit frequency to 868.4Mhz
1522
1523 (% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1524
1525 (% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
1526
1527 (% style="background-color:#dcdcdc" %)**AT+DADDR=26** (%%) 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1528
1529 (% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
1530
1531
1532 (% style="color:red" %)**Note:**
1533
1534 (((
1535 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1536 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1537 3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1538 4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1539
1540
1541 )))
1542
1543 (% aria-label="1654162478620-421.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162478620-421.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1544
1545
1546 = 6. FAQ =
1547
1548 == 6.1 How to upgrade the image? ==
1549
1550
1551 (((
1552 The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
1553 )))
1554
1555 * (((
1556 Support new features
1557 )))
1558 * (((
1559 For bug fix
1560 )))
1561 * (((
1562 Change LoRaWAN bands.
1563 )))
1564
1565 (((
1566 Below shows the hardware connection for how to upload an image to RS485-LN:
1567 )))
1568
1569 (% aria-label="1654162535040-878.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162535040-878.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
1570
1571 (% title="Click and drag to resize" %)​
1572
1573 (((
1574 (% style="color:blue" %)**Step1**(%%)**:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1575
1576
1577 )))
1578
1579 (((
1580 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACP33wo_ZQLsxW2MJ70oUoba/RS485-LN/Firmware?dl=0&subfolder_nav_tracking=1]].
1581
1582
1583 )))
1584
1585 (((
1586 (% style="color:blue" %)**Step3**(%%)**: **Open flashloader; choose the correct COM port to update.
1587
1588
1589 )))
1590
1591 (((
1592 (((
1593 (((
1594 (% style="color:blue" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.
1595 )))
1596 )))
1597 )))
1598
1599
1600 (% aria-label="image-20220602175818-12.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175818-12.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1601
1602
1603 (% aria-label="image-20220602175848-13.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175848-13.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1604
1605
1606 (% aria-label="image-20220602175912-14.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175912-14.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1607
1608
1609 (% style="color:red" %)**Notice**: **In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:**
1610
1611 (% aria-label="image-20220602175638-10.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175638-10.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
1612
1613
1614 == 6.2 How to change the LoRa Frequency Bands/Region? ==
1615
1616
1617 User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1618
1619
1620 == 6.3 How many RS485-Slave can RS485-LN connects? ==
1621
1622
1623 The RS485-LN can support max 32 RS485 devices. Each uplink command of RS485-LN can support max 16 different RS485 command. So RS485-LN 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>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
1624
1625
1626 == 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
1627
1628
1629 When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
1630
1631 Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
1632
1633
1634 == 6.5 Can i use point to point communication for RS485-LN? ==
1635
1636
1637 Yes, please updating point-to-point [[firmware>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACP33wo_ZQLsxW2MJ70oUoba/RS485-LN/Firmware?dl=0&subfolder_nav_tracking=1]]，then refer [[Point to Point Communication for RS485-LN>>Point to Point Communication for RS485-LN]].
1638
1639
1640 == 6.6 How to Use RS485-LN  to connect to RS232 devices? ==
1641
1642
1643 [[Use RS485-BL or RS485-LN to connect to RS232 devices. - DRAGINO>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/RS485%20to%20RS232/]]
1644
1645
1646 == 6.7 How to judge whether there is a problem with the set COMMAND ==
1647
1648 === 6.7.1 Introduce: ===
1649
1650
1651 Users can use below the structure to fast debug the communication between RS485BL and RS485-LN. The principle is to put the PC in the RS485 network and sniff the packet between Modbus MTU and RS485-BL/LN. We can use this way to:
1652
1653 1. Test if Modbus-MTU works with PC commands.
1654 1. Check if RS485-LN sent the expected command to Mobus-MTU
1655 1. Check if Modbus-MTU return back the expected result to RS485-LN.
1656 1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output.
1657
1658 [[image:image-20221130104310-1.png||height="380" width="680"]]
1659
1660
1661 Example Connection:
1662
1663 [[image:image-20221130104310-2.png]]
1664
1665
1666 === 6.7.2 Set up PC to monitor RS485 network With Serial tool ===
1667
1668
1669 (% style="color:red" %)**Note: Receive and send set to hex mode**
1670
1671 [[image:image-20221130104310-3.png||height="616" width="714"]]
1672
1673
1674 === 6.7.3 With ModRSsim2: ===
1675
1676
1677 (% style="color:blue" %)**(1) Select serial port MODBUS RS-232**
1678
1679 [[image:image-20221130104310-4.png||height="390" width="865"]]
1680
1681
1682 (% style="color:blue" %)**(2) Click the serial port icon**
1683
1684 [[image:image-20221130104310-5.png||height="392" width="870"]]
1685
1686
1687 (% style="color:blue" %)**(3) After selecting the correct serial port and baud rate, click ok**
1688
1689 [[image:image-20221130104310-6.png]]
1690
1691
1692 (% style="color:blue" %)**(4) Click the comms.**
1693
1694 [[image:image-20221130104310-7.png||height="376" width="835"]]
1695
1696 (% class="wikigeneratedid" id="HRunRS485-LN2FBLcommandandmonitorifitiscorrect." %)
1697 **Run RS485-LN/BL command and monitor if it is correct.**
1698
1699
1700 === 6.7.4 Example – Test the CFGDEV command ===
1701
1702
1703 RS485-LN sent below command:
1704
1705 (% style="color:blue" %)**AT+CFGDEV=01 03 20 00 01 85 c0,1**(%%) to RS485 network, and PC is able to get this command and return commands from MTU to show in the serial tool.
1706
1707
1708 We can see the output from the Serial port tool to analyze. And check if they are expected result.
1709
1710 [[image:image-20221130104310-8.png||height="214" width="797"]]
1711
1712
1713 We can also use (% style="color:blue" %)**ModRSsim2**(%%) to see the output.
1714
1715 [[image:image-20221130104310-9.png||height="531" width="729"]]
1716
1717
1718 === 6.7.5 Example – Test CMD command sets. ===
1719
1720
1721 Run (% style="color:blue" %)**AT+SENSORVALUE=1**(%%) to test the CMD commands set in RS485-LN.
1722
1723
1724 (% style="color:blue" %)**Serial port tool:**
1725
1726 [[image:image-20221130104310-10.png||height="339" width="844"]]
1727
1728
1729 (% style="color:blue" %)**ModRSsim2:**
1730
1731 [[image:image-20221130104310-11.png||height="281" width="962"]]
1732
1733
1734 === 6.7.6 Test with PC ===
1735
1736
1737 If there is still have problem to set up correctly the commands between RS485-LN and MTU. User can test the correct RS485 command set in PC and compare with the RS485 command sent out via RS485-LN. as long as both commands are the same, the MTU should return correct result.
1738
1739
1740 Or User can send the working commands set in PC serial tool to Dragino Support to check what should be configured in RS485-LN.
1741
1742 (% style="color:blue" %)**Connection method：**
1743
1744 [[image:image-20221130104310-12.png]]
1745
1746
1747 (% style="color:blue" %)**Link situation:**
1748
1749 [[image:image-20221130104310-13.png||height="458" width="486"]]
1750
1751
1752 [[image:image-20221130104310-14.png||height="371" width="823"]]
1753
1754
1755 == 6.8 Where to get the decoder for RS485-LN? ==
1756
1757 The decoder for RS485-LN needs to be written by yourself. Because the sensor to which the user is connected is custom, the read device data bytes also need custom parsing, so there is no universal decoder. We can only provide [[templates>>https://github.com/dragino/dragino-end-node-decoder/tree/main/RS485-LN]] for decoders (no intermediate data parsing part involved)
1758
1759
1760 = 7. Trouble Shooting =
1761
1762 == 7.1 Downlink doesn't work, how to solve it? ==
1763
1764
1765 Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
1766
1767
1768 == 7.2 Why I can't join TTN V3 in US915 /AU915 bands? ==
1769
1770
1771 It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1772
1773
1774 = 8. Order Info =
1775
1776
1777 (% style="color:blue" %)**Part Number: RS485-LN-XXX**
1778
1779 (% style="color:blue" %)**XXX:**
1780
1781 * (% style="color:red" %)**EU433**(%%):  frequency bands EU433
1782 * (% style="color:red" %)**EU868**(%%):  frequency bands EU868
1783 * (% style="color:red" %)**KR920**(%%):  frequency bands KR920
1784 * (% style="color:red" %)**CN470**(%%):  frequency bands CN470
1785 * (% style="color:red" %)**AS923**(%%):  frequency bands AS923
1786 * (% style="color:red" %)**AU915**(%%):  frequency bands AU915
1787 * (% style="color:red" %)**US915**(%%):  frequency bands US915
1788 * (% style="color:red" %)**IN865**(%%):  frequency bands IN865
1789 * (% style="color:red" %)**RU864**(%%):  frequency bands RU864
1790 * (% style="color:red" %)**KZ865**(%%):  frequency bands KZ865
1791
1792
1793
1794 = 9. Packing Info =
1795
1796
1797 **Package Includes**:
1798
1799 * RS485-LN x 1
1800 * Stick Antenna for LoRa RF part x 1
1801 * Program cable x 1
1802
1803 **Dimension and weight**:
1804
1805 * Device Size: 13.5 x 7 x 3 cm
1806 * Device Weight: 105g
1807 * Package Size / pcs : 14.5 x 8 x 5 cm
1808 * Weight / pcs : 170g
1809
1810
1811
1812 = 10. FCC Caution for RS485LN-US915 =
1813
1814
1815 (((
1816 Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
1817 )))
1818
1819 (((
1820 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
1821 )))
1822
1823 (((
1824
1825 )))
1826
1827 (((
1828 (% style="color:red" %)**IMPORTANT NOTE:**
1829 )))
1830
1831 (((
1832 (% style="color:red" %)**Note: **(%%)This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
1833 )))
1834
1835 (((
1836 —Reorient or relocate the receiving antenna.
1837 )))
1838
1839 (((
1840 —Increase the separation between the equipment and receiver.
1841 )))
1842
1843 (((
1844 —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
1845 )))
1846
1847 (((
1848 —Consult the dealer or an experienced radio/TV technician for help.
1849 )))
1850
1851 (((
1852
1853 )))
1854
1855 (((
1856 (% style="color:red" %)**FCC Radiation Exposure Statement:**
1857 )))
1858
1859 (((
1860 This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
1861 )))
1862
1863
1864 = 11. Support =
1865
1866
1867 * (((
1868 Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1869 )))
1870 * (((
1871 Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
1872
1873
1874
1875 )))

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