Version 95.1 by Bei Jinggeng on 2022/11/30 10:47
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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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31 = 1.Introduction =
32
33
34 == 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
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38 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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42 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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46 (% 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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50 (% 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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54 (% 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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58 (% 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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61
62 == 1.2 Specifications ==
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64
65 (% style="color:#037691" %)**Hardware System:**
66
67 * STM32L072xxxx MCU
68 * SX1276/78 Wireless Chip 
69 * Power Consumption (exclude RS485 device):
70 ** Idle: 32mA@12v
71 ** 20dB Transmit: 65mA@12v
72
73 (% style="color:#037691" %)**Interface for Model:**
74
75 * RS485
76 * Power Input 7~~ 24V DC. 
77
78 (% style="color:#037691" %)**LoRa Spec:**
79
80 * Frequency Range:
81 ** Band 1 (HF): 862 ~~ 1020 Mhz
82 ** Band 2 (LF): 410 ~~ 528 Mhz
83 * 168 dB maximum link budget.
84 * +20 dBm - 100 mW constant RF output vs.
85 * +14 dBm high efficiency PA.
86 * Programmable bit rate up to 300 kbps.
87 * High sensitivity: down to -148 dBm.
88 * Bullet-proof front end: IIP3 = -12.5 dBm.
89 * Excellent blocking immunity.
90 * Low RX current of 10.3 mA, 200 nA register retention.
91 * Fully integrated synthesizer with a resolution of 61 Hz.
92 * FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
93 * Built-in bit synchronizer for clock recovery.
94 * Preamble detection.
95 * 127 dB Dynamic Range RSSI.
96 * Automatic RF Sense and CAD with ultra-fast AFC.
97 * Packet engine up to 256 bytes with CRC
98
99
100 == 1.3 Features ==
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102
103 * LoRaWAN Class A & Class C protocol (default Class C)
104 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864/MA869
105 * AT Commands to change parameters
106 * Remote configure parameters via LoRa Downlink
107 * Firmware upgradable via program port
108 * Support multiply RS485 devices by flexible rules
109 * Support Modbus protocol
110 * Support Interrupt uplink (Since hardware version v1.2)
111
112
113 == 1.4 Applications ==
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115
116 * Smart Buildings & Home Automation
117 * Logistics and Supply Chain Management
118 * Smart Metering
119 * Smart Agriculture
120 * Smart Cities
121 * Smart Factory
122
123
124 == 1.5 Firmware Change log ==
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127 [[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 == 1.6 Hardware Change log ==
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137 v1.2: Add External Interrupt Pin.
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141 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
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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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162 (% aria-label="1653268091319-405.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268091319-405.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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167
168 = 3. Operation Mode =
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170
171 == 3.1 How it works? ==
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174 (((
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176 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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182
183 == 3.2 Example to join LoRaWAN network ==
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186 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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194 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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198 485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
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203 (% 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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207 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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213 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from RS485-LN.
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217 Each RS485-LN is shipped with a sticker with unique device EUI:
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221 (% aria-label="1652953462722-299.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953462722-299.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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226 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
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232 **Add APP EUI in the application.**
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236 (% aria-label="image-20220519174512-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-1.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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240 (% 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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242 (% 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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245 (% title="Click and drag to resize" %)​
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247 You can also choose to create the device manually.
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249 (% 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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253 **Add APP KEY and DEV EUI**
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255 (% 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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259 (((
260 (% 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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265 (% 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" %)​
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268
269 == 3.3 Configure Commands to read data ==
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272 (((
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275 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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283 (% 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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290
291 === 3.3.1 Configure UART settings for RS485 or TTL communication ===
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294 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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297 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
298 |=(% style="width: 110px;" %)(((
299 **AT Commands**
300 )))|=(% style="width: 210px;" %)(((
301 **Description**
302 )))|=(% style="width: 190px;" %)(((
303 **Example**
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305 |(% style="width:110px" %)(((
306 AT+BAUDR
307 )))|(% style="width:190px" %)(((
308 Set the baud rate (for RS485 connection). Default Value is: 9600.
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311 AT+BAUDR=9600
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315 Options: (1200,2400,4800,14400,19200,115200)
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318 |(% style="width:110px" %)(((
319 AT+PARITY
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321 Set UART parity (for RS485 connection)
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324 AT+PARITY=0
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328 Option: 0: no parity, 1: odd parity, 2: even parity
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331 |(% style="width:110px" %)(((
332 AT+STOPBIT
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335 Set serial stopbit (for RS485 connection)
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343 AT+STOPBIT=0 for 1bit
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347 AT+STOPBIT=1 for 1.5 bit
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351 AT+STOPBIT=2 for 2 bits
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354
355
356 === 3.3.2 Configure sensors ===
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361 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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367 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
368 |=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 210px;" %)**Description**|=(% style="width: 190px;" %)**Example**
369 |AT+CFGDEV|(% style="width:110px" %)(((
370 (((
371 This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
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374 (((
375 AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
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378 (((
379 mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
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381 )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
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383
384 === 3.3.3 Configure read commands for each sampling ===
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388 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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390 To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
391
392 This section describes how to achieve above goals.
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394 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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396
397 (% style="color:#037691" %)**Each RS485 commands include two parts:**
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399
400 ~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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402 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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404 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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407 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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409 Below are examples for the how above AT Commands works.
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412 (% 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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414 (% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
415 |(% style="width:496px" %)(((
416 **AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
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418 **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
419
420 **m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**
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422
423 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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425 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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427
428 (% 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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430 (% border="1" style="background-color:#4bacc6; color:white; width:510px" %)
431 |(% style="width:510px" %)(((
432 **AT+DATACUTx=a,b,c**
433
434 * **a: length for the return of AT+COMMAND**
435 * **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**
436 * **c: define the position for valid value.  **
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438
439 **Examples:**
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442 * (% style="color:#037691" %)**Grab bytes**
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444 (% 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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448 * (% style="color:#037691" %)**Grab a section**
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450 (% aria-label="image-20220602153621-2.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-2.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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452
453
454 * (% style="color:#037691" %)**Grab different sections**
455
456 (% 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" %)​
457
458
459
460 )))
461
462 === 3.3.4 Compose the uplink payload ===
463
464
465 (((
466 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.**
467
468
469 )))
470
471 (((
472 (% style="color:#037691" %)**Examples: AT+DATAUP=0**
473
474
475 )))
476
477 (((
478 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.
479 )))
480
481 (((
482 Final Payload is (% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**
483 )))
484
485 (((
486 Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
487
488
489 )))
490
491 [[image:image-20220929111027-1.png||height="509" width="685"]](% title="Click and drag to resize" %)​
492
493
494 (% style="color:#037691" %)**Examples: AT+DATAUP=1**
495
496
497 Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.
498
499 Final Payload is (% style="color:#4f81bd" %)**PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
500
501
502 ~1. PAYVER: Defined by AT+PAYVER
503
504 2. PAYLOAD COUNT: Total how many uplinks of this sampling.
505
506 3. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
507
508 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
509
510
511 (% 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" %)​
512
513
514 So totally there will be 3 uplinks for this sampling, each uplink include 8 bytes DATA
515
516 DATA1=RETURN1 Valid Value + the first two of Valid value of RETURN10= **20 20 0a 33 90 41 02 aa**
517
518 DATA2=3^^rd^^ ~~ 10^^th^^ byte of Valid value of RETURN10= **05 81 0a 20 20 20 20 2d**
519
520 DATA3=the rest of Valid value of RETURN10= **30**
521
522
523 (% 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:**
524
525
526 ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.
527
528 * For AU915/AS923 bands, if UplinkDwell time=0, max 11 bytes for each uplink.
529
530 * For US915 band, max 11 bytes for each uplink.
531
532 ~* For all other bands: max 51 bytes for each uplink.
533
534
535 (% style="color:red" %)** When AT+DATAUP=1, the maximum number of segments is 15, and the maximum total number of bytes is 1500;**
536
537 (% 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)**
538
539
540
541 Below are the uplink payloads:
542
543
544 (% 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" %)​
545
546
547
548 === 3.3.5 Uplink on demand ===
549
550
551 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.
552
553 (% style="color:blue" %)**Downlink control command:**
554
555 (% style="color:#4472c4" %)** 0x08 command**(%%): Poll an uplink with current command set in RS485-LN.
556
557 (% style="color:#4472c4" %)** 0xA8 command**(%%): Send a command to RS485-LN and uplink the output from sensors.
558
559
560
561 === 3.3.6 Uplink on Interrupt ===
562
563
564 RS485-LN support external Interrupt uplink since hardware v1.2 release.
565
566
567 (% 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" %)​
568
569 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.
570
571
572
573 == 3.4 Uplink Payload ==
574
575
576 (% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
577 |=(% scope="row" style="width: 60px;" %)(((
578 Size(bytes)
579 )))|(% style="width:80px" %)1|(% style="width:360px" %)(((
580 Length depends on the return from the commands
581 )))
582 |=(% style="width: 90px;" %)(((
583 Value
584 )))|(% style="width:114px" %)(((
585 PAYLOAD_VER
586 )))|(% style="width:353px" %)(((
587 If the valid payload is too long and exceed the maximum
588
589 support payload length in server, server will show payload not
590
591 provided in the LoRaWAN server.
592 )))
593
594 (% 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"]]
595
596 (% title="Click and drag to resize" %)​
597
598 Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
599
600
601
602 == 3.5 Configure RS485-LN via AT or Downlink ==
603
604
605 (((
606 User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
607 )))
608
609 (((
610 There are two kinds of Commands:
611 )))
612
613 * (((
614 (% 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]]
615 )))
616
617 * (((
618 (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-LN.  User can see these commands below:
619 )))
620
621 (((
622
623 )))
624
625
626
627 === 3.5.1 Common Commands ===
628
629
630 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]]
631
632
633
634 === 3.5.2 Downlink Response(Since firmware v1.4) ===
635
636
637 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.
638
639
640 (% 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"]]
641
642 (% title="Click and drag to resize" %)​
643
644 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)
645
646
647
648 === 3.5.3 Sensor related commands ===
649
650
651
652
653 ==== (% style="color:blue" %)**RS485 Debug Command**(%%) ====
654
655
656 (((
657 This command is used to configure the RS485 devices; they won't be used during sampling. Max Length of AT+CFGDEV is **40 bytes**.
658 )))
659
660 (((
661 * (% style="color:#037691" %)**AT Command**
662
663 (((
664 (% 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
665 )))
666 )))
667
668 (((
669
670 )))
671
672 * (((
673 (% style="color:#037691" %)**Downlink Payload**
674 )))
675
676 (((
677 Format: (% style="color:#4472c4" %)** A8 MM NN XX XX XX XX YY**
678 )))
679
680 (((
681 Where:
682 )))
683
684 * (((
685 MM: 1: add CRC-16/MODBUS ; 0: no CRC
686 )))
687 * (((
688 NN: The length of RS485 command
689 )))
690 * (((
691 XX XX XX XX: RS485 command total NN bytes
692 )))
693 * (((
694 (((
695 YY: How many bytes will be uplink from the return of this RS485 command,
696 )))
697
698 * (((
699 if YY=0, RS485-LN will execute the downlink command without uplink;
700 )))
701 * (((
702 if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200
703 )))
704 * (((
705 if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.
706 )))
707 )))
708
709 (((
710
711
712 (% style="color:blue" %)**Example 1:**  (%%) ~-~-> Configure without ask for uplink (YY=0)
713 )))
714
715 (((
716 To connect a Modbus Alarm with below commands.
717 )))
718
719 * (((
720 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.
721 )))
722
723 * (((
724 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.
725 )))
726
727 (((
728
729
730 So if user want to use downlink command to control to RS485 Alarm, he can use:
731 )))
732
733 (((
734 (% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm
735 )))
736
737 (((
738 (% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
739 )))
740
741 (((
742 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.
743 )))
744
745 (((
746
747 )))
748
749 (((
750 (% style="color:blue" %)**Example 2:**  (%%) ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
751 )))
752
753 (((
754 User in IoT server send a downlink command: (% style="color:#4f81bd" %)**A8 01 06 0A 08 00 04 00 01 YY**
755 )))
756
757 (((
758
759 )))
760
761 (((
762 (((
763 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**
764 )))
765
766
767 )))
768
769 (((
770 (% 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" %)​
771 )))
772
773
774
775
776 ==== (% style="color:blue" %)**Set Payload version**(%%) ====
777
778
779 (((
780 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.
781 )))
782
783 (((
784 * (% style="color:#037691" %)**AT Command:**
785
786 (% style="color:#4472c4" %)** AT+PAYVER:    ** (%%) Set PAYVER field = 1
787
788
789 )))
790
791 * (((
792 (% style="color:#037691" %)**Downlink Payload:**
793 )))
794
795 (((
796 (% style="color:#4472c4" %)** 0xAE 01** (%%) ~-~->  Set PAYVER field =  0x01
797 )))
798
799 (((
800 (% style="color:#4472c4" %)** 0xAE 0F**   (%%) ~-~->  Set PAYVER field =  0x0F
801 )))
802
803
804 **1 )  Add the interrupt flag at the highest bit of the Payver byte, that is, Byte7 of the first byte. (Since v1.4.0)**
805
806
807 [[image:image-20220824145428-2.png||height="168" width="1300"]]
808
809
810
811 **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.**
812
813
814 [[image:image-20220824145428-3.png||height="308" width="1200"]]
815
816
817
818
819 ==== (% style="color:blue" %)**Set RS485 Sampling Commands**(%%) ====
820
821
822 (((
823 AT+COMMANDx or AT+DATACUTx
824 )))
825
826 (((
827 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"]].
828 )))
829
830 (((
831
832 )))
833
834 * (((
835 (% style="color:#037691" %)**AT Command:**
836 )))
837
838 (% style="color:#4472c4" %)** AT+COMMANDx:    ** (%%) Configure RS485 read command to sensor.
839
840 (% style="color:#4472c4" %)** AT+DATACUTx:        **(%%) Configure how to handle return from RS485 devices.
841
842
843 * (((
844 (% style="color:#037691" %)**Downlink Payload:**
845 )))
846
847 (((
848 (% style="color:#4472c4" %)** 0xAF**(%%) downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
849
850
851 )))
852
853 (((
854 (% style="color:red" %)**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
855
856
857 )))
858
859 (((
860 Format: (% style="color:#4472c4" %)** AF MM NN LL XX XX XX XX YY**
861 )))
862
863 (((
864 Where:
865 )))
866
867 * (((
868 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
869 )))
870 * (((
871 NN:  0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
872 )))
873 * (((
874 LL:  The length of AT+COMMAND or AT+DATACUT command
875 )))
876 * (((
877 XX XX XX XX: AT+COMMAND or AT+DATACUT command
878 )))
879 * (((
880 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.
881 )))
882
883 (((
884
885
886 **Example:**
887 )))
888
889 (((
890 (% 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
891 )))
892
893 (((
894 (% 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**
895 )))
896
897 (((
898 (% 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**
899 )))
900
901
902
903
904 ==== (% style="color:blue" %)**Fast command to handle MODBUS device**(%%) ====
905
906
907 (((
908 (% 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]].
909 )))
910
911 (((
912 This command is valid since v1.3 firmware version
913 )))
914
915 (((
916 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.
917 )))
918
919 (((
920
921 )))
922
923 (((
924 **Example:**
925 )))
926
927 * (((
928 AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2  are not configure (0,0,0). So RS485-LN.
929 )))
930 * (((
931 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.
932 )))
933 * (((
934 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.
935
936
937 )))
938
939 (% aria-label="image-20220602165351-6.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602165351-6.png||data-widget="image"]]
940
941 (% title="Click and drag to resize" %)​
942
943 (% 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" %)​
944
945
946
947
948 ==== (% style="color:blue" %)**RS485 command timeout**(%%) ====
949
950
951 (((
952 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.
953 )))
954
955 (((
956 Default value: 0, range:  0 ~~ 65 seconds
957 )))
958
959 (((
960 * (% style="color:#037691" %)** AT Command:**
961
962 (% style="color:#4472c4" %)** AT+CMDDLaa=hex(bb cc)*1000**
963 )))
964
965 (((
966
967
968 **Example:**
969 )))
970
971 (((
972 (% style="color:#4472c4" %)** AT+CMDDL1=1000** (%%)to send the open time to 1000ms
973 )))
974
975 (((
976
977 )))
978
979 * (((
980 (% style="color:#037691" %)** Downlink Payload:**
981 )))
982
983 (((
984 (% style="color:#4472c4" %)** 0x AA aa bb cc**(%%) Same as: AT+CMDDLaa=hex(bb cc)*1000
985 )))
986
987 (((
988
989
990 **Example:**
991 )))
992
993 (((
994 **0xAA 01 00 01**  ~-~-> Same as  **AT+CMDDL1=1000 ms**
995 )))
996
997
998
999
1000 ==== (% style="color:blue" %)**Uplink payload mode**(%%) ====
1001
1002
1003 (((
1004 Define to use one uplink or multiple uplinks for the sampling.
1005 )))
1006
1007 (((
1008 The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]
1009
1010
1011 )))
1012
1013 (((
1014 * (% style="color:#037691" %)** AT Command:**
1015
1016 (% style="color:#4472c4" %)** AT+DATAUP=0**
1017
1018 (% style="color:#4472c4" %)** AT+DATAUP=1**
1019
1020
1021 )))
1022
1023 (% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000  ~/~/  (00 00 14 is 20 seconds)
1024
1025 Each uplink is sent to the server at 20-second intervals when segmented.
1026
1027
1028 * (((
1029 (% style="color:#037691" %)** Downlink Payload:**
1030 )))
1031
1032 (% style="color:#4472c4" %)** 0xAD 00** (%%) **~-~->** Same as AT+DATAUP=0
1033
1034 (% 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.
1035
1036
1037 * (((
1038 (% style="color:#037691" %)** AT Command:**
1039 )))
1040
1041 (% style="color:#4472c4" %)** AT+DATAUP=1,Timeout**
1042
1043
1044 * (((
1045 (% style="color:#037691" %)** Downlink Payload:**
1046 )))
1047
1048 (% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000  ~/~/  (00 00 14 is 20 seconds)
1049
1050 Each uplink is sent to the server at 20-second intervals when segmented.
1051
1052
1053
1054
1055 ==== (% style="color:blue" %)**Manually trigger an Uplink**(%%) ====
1056
1057
1058 (((
1059 Ask device to send an uplink immediately.
1060 )))
1061
1062 * (((
1063 (% style="color:#037691" %)** AT Command:**
1064 )))
1065
1066 (((
1067 No AT Command for this, user can press the [[ACT button>>||anchor="H3.7Buttons"]] for 1 second for the same.
1068 )))
1069
1070 (((
1071
1072 )))
1073
1074 * (((
1075 (% style="color:#037691" %)** Downlink Payload:**
1076 )))
1077
1078 (((
1079 (% style="color:#4472c4" %)** 0x08 FF**(%%), RS485-LN will immediately send an uplink.
1080 )))
1081
1082
1083
1084
1085 ==== (% style="color:blue" %)**Clear RS485 Command**(%%) ====
1086
1087
1088 (((
1089 The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
1090
1091
1092 )))
1093
1094 * (((
1095 (% style="color:#037691" %)** AT Command:**
1096 )))
1097
1098 (((
1099 (% style="color:#4472c4" %)** AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase
1100 )))
1101
1102 (((
1103
1104
1105 Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
1106 )))
1107
1108 (((
1109 Example screen shot after clear all RS485 commands. 
1110 )))
1111
1112 (((
1113
1114 )))
1115
1116 (((
1117 The uplink screen shot is:
1118 )))
1119
1120 (% 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" %)​
1121
1122
1123 * (((
1124 (% style="color:#037691" %)** Downlink Payload:**
1125 )))
1126
1127 (((
1128 (% style="color:#4472c4" %)** 0x09 aa bb** (%%) same as AT+CMDEAR=aa,bb
1129 )))
1130
1131
1132
1133
1134 ==== (% style="color:blue" %)**Set Serial Communication Parameters**(%%) ====
1135
1136
1137 (((
1138 Set the Rs485 serial communication parameters:
1139 )))
1140
1141 (((
1142 (% style="color:#037691" %)**AT Command:**
1143 )))
1144
1145 (((
1146 * Set Baud Rate
1147 )))
1148
1149 (% 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
1150
1151
1152 (((
1153 * Set UART Parity
1154 )))
1155
1156 (% style="color:#4472c4" %)** AT+PARITY=0** (%%) ~/~/  Option: 0: no parity, 1: odd parity, 2: even parity
1157
1158
1159 (((
1160 * Set STOPBIT
1161 )))
1162
1163 (% style="color:#4472c4" %)** AT+STOPBIT=0** (%%) ~/~/  Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1164
1165
1166 (((
1167 (% style="color:#037691" %)**Downlink Payload:**
1168 )))
1169
1170 (((
1171 (% style="color:#4472c4" %)** A7 01 aa bb**:   (%%) Same  AT+BAUDR=hex(aa bb)*100
1172 )))
1173
1174 (((
1175 **Example:**
1176 )))
1177
1178 * (((
1179 A7 01 00 60  same as AT+BAUDR=9600
1180 )))
1181 * (((
1182 A7 01 04 80  same as AT+BAUDR=115200
1183 )))
1184
1185 (((
1186 * A7 02 aa:  Same as  AT+PARITY=aa  (aa value: 00 , 01 or 02)
1187 )))
1188
1189 (((
1190 * A7 03 aa:  Same as  AT+STOPBIT=aa  (aa value: 00 , 01 or 02)
1191 )))
1192
1193
1194
1195
1196 ==== (% style="color:blue" %)**Configure Databit (Since Version 1.4.0)**(%%) ====
1197
1198
1199 * (((
1200 (% style="color:#037691" %)** AT Command:**
1201 )))
1202
1203 (% style="color:#4472c4" %)** AT+DATABIT=7    **(%%)~/~/ Set the data bits to 7
1204
1205 (% style="color:#4472c4" %)** AT+DATABIT=8    **(%%)~/~/ Set the data bits to 8
1206
1207 * (((
1208 (% style="color:#037691" %)**Downlink Payload:**
1209 )))
1210
1211 (% style="color:#4472c4" %)** A7 04 07**(%%): Same as  AT+DATABIT=7
1212
1213 (% style="color:#4472c4" %)** A7 04 08**(%%): Same as  AT+DATABIT=8
1214
1215
1216
1217 ==== (% style="color:blue" %)**Encrypted payload**(%%) ====
1218
1219 (((
1220
1221 )))
1222
1223 * (((
1224 (% style="color:#037691" %)** AT Command:**
1225 )))
1226
1227 (% style="color:#4472c4" %)** AT+DECRYPT=1  ** (%%) ~/~/ The payload is uploaded without encryption
1228
1229 (% style="color:#4472c4" %)** AT+DECRYPT=0  ** (%%) ~/~/ Encrypt when uploading payload (default)
1230
1231
1232
1233
1234 ==== (% style="color:blue" %)**Get sensor value**(%%) ====
1235
1236
1237 * (((
1238 (% style="color:#037691" %)** AT Command:**
1239 )))
1240
1241 (% style="color:#4472c4" %)** AT+GETSENSORVALUE=0  **(%%) ~/~/ The serial port gets the reading of the current sensor
1242
1243 (% style="color:#4472c4" %)** AT+GETSENSORVALUE=1  **(%%) ~/~/ The serial port gets the current sensor reading and uploads it.
1244
1245
1246
1247
1248 ==== (% style="color:blue" %)**Resets the downlink packet count**(%%) ====
1249
1250
1251 * (((
1252 (% style="color:#037691" %)** AT Command:**
1253 )))
1254
1255 (% 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)
1256
1257 (% 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.
1258
1259
1260
1261
1262 ==== (% style="color:blue" %)**When the limit bytes are exceeded, upload in batches**(%%) ====
1263
1264
1265 * (((
1266 (% style="color:#037691" %)** AT Command:**
1267 )))
1268
1269 (% 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)
1270
1271 (% 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.
1272
1273
1274 * (((
1275 (% style="color:#037691" %)** Downlink Payload:**
1276 )))
1277
1278 (% style="color:#4472c4" %)** 0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1279
1280
1281
1282
1283 ==== (% style="color:blue" %)** Copy downlink to uplink **(%%) ====
1284
1285
1286 * (((
1287 (% style="color:#037691" %)** AT Command:**
1288 )))
1289
1290 (% 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.
1291
1292 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.
1293
1294
1295 [[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"]]
1296
1297 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1298
1299
1300
1301 [[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"]]
1302
1303 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1304
1305
1306
1307
1308 ==== (% style="color:blue" %)**Query version number and frequency band 、TDC**(%%) ====
1309
1310
1311 (((
1312 * (% style="color:#037691" %)**Downlink Payload:**
1313
1314 (% style="color:#4472c4" %)** 26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1315 )))
1316
1317
1318 Example：
1319
1320
1321 [[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"]]
1322
1323
1324
1325
1326 ==== (% style="color:blue" %)** Monitor RS485 communication of other devices**(%%) ====
1327
1328
1329 * (((
1330 (% style="color:#037691" %)** AT Command:**
1331 )))
1332
1333 (% 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.
1334
1335 (% 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.
1336
1337 (% style="color:#4472c4" %)**AT+RXMODE=0,0  ** (%%) ~/~/  Disable this mode (default)
1338
1339
1340 * (((
1341 (% style="color:#037691" %)**Downlink Payload:**
1342 )))
1343
1344 (% style="color:#4472c4" %)** A6 aa bb bb               ** (%%) ~/~/ same as AT+RXMODE=aa,bb
1345
1346 [[image:image-20220824144240-1.png]]
1347
1348
1349
1350 == 3.6 Listening mode for RS485 network ==
1351
1352
1353 (((
1354 This feature support since firmware v1.4
1355 )))
1356
1357 (((
1358 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.
1359
1360
1361 )))
1362
1363 (% 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"]]
1364
1365 (% title="Click and drag to resize" %)​
1366
1367 (((
1368 To enable the listening mode, use can run the command (% style="color:#4472c4" %)** AT+RXMODE**.
1369 )))
1370
1371 (((
1372
1373 )))
1374
1375 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1376 |=(% style="width: 100px;" %)(((
1377 **Command example**
1378 )))|=(% style="width: 400px;" %)(((
1379 **Function**
1380 )))
1381 |(% style="width:100px" %)(((
1382 AT+RXMODE=1,10
1383 )))|(% style="width:400px" %)(((
1384 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.
1385 )))
1386 |(% style="width:100px" %)(((
1387 AT+RXMODE=2,500
1388 )))|(% style="width:400px" %)(((
1389 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
1390 )))
1391 |(% style="width:100px" %)(((
1392 AT+RXMODE=0,0
1393 )))|(% style="width:400px" %)(((
1394 Disable listening mode. This is the default settings.
1395 )))
1396 |(% style="width:100px" %)(((
1397
1398 )))|(% style="width:400px" %)(((
1399 A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
1400 )))
1401
1402 (((
1403
1404
1405 (% style="color:#037691" %)**Downlink Command:**
1406 )))
1407
1408 (((
1409 (% style="color:#4472c4" %)** 0xA6 aa bb cc **(%%) same as AT+RXMODE=aa,(bb<<8 | cc)
1410 )))
1411
1412 (((
1413
1414 )))
1415
1416 (((
1417 **Example**:
1418 )))
1419
1420 (((
1421 The RS485-LN is set to AT+RXMODE=2,1000
1422 )))
1423
1424 (((
1425 There is a two Modbus commands in the RS485 network as below:
1426 )))
1427
1428 (((
1429 The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
1430 )))
1431
1432 (((
1433 And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
1434 )))
1435
1436 (((
1437 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
1438
1439
1440 )))
1441
1442 (((
1443 (% 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" %)​
1444 )))
1445
1446 (((
1447
1448 )))
1449
1450 (((
1451 (((
1452 (% 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.**
1453 )))
1454 )))
1455
1456
1457
1458 == 3.7 Buttons ==
1459
1460
1461 (% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1462 |=(% style="width: 50px;" %)**Button**|=(% style="width: 380px;" %)**Feature**
1463 |(% 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**
1464 |(% style="width:50px" %)**RST**|(% style="width:361px" %)Reboot RS485
1465 |(% style="width:50px" %)**PRO**|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1466
1467
1468 == 3.8 LEDs ==
1469
1470
1471 (% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1472 |=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
1473 |**PWR**|Always on if there is power
1474 |**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.
1475
1476
1477 = 4. Case Study =
1478
1479
1480 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]]
1481
1482
1483
1484 = 5. Use AT Command =
1485
1486
1487 == 5.1 Access AT Command ==
1488
1489
1490 (((
1491 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.
1492
1493
1494 )))
1495
1496 (% 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" %)​
1497
1498
1499
1500 (((
1501 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:
1502
1503
1504 )))
1505
1506 (% 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" %)​
1507
1508
1509 (((
1510 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/]]
1511 )))
1512
1513
1514
1515 == 5.2 Common AT Command Sequence ==
1516
1517
1518 === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1519
1520
1521 If device has not joined network yet:
1522
1523 * (% style="color:#037691" %)**AT+FDR**
1524 * (% style="color:#037691" %)**AT+NJM=0**
1525 * (% style="color:#037691" %)**ATZ**
1526
1527 (((
1528
1529
1530 If device already joined network:
1531
1532 * (% style="color:#037691" %)**AT+NJM=0**
1533 * (% style="color:#037691" %)**ATZ**
1534
1535
1536 )))
1537
1538
1539
1540 === 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
1541
1542
1543 (% style="background-color:#dcdcdc" %)**AT+FDR** (%%) Reset Parameters to Factory Default, Keys Reserve
1544
1545 (% style="background-color:#dcdcdc" %)**AT+NJM=0 **(%%) Set to ABP mode
1546
1547 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) Set the Adaptive Data Rate Off
1548
1549 (% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%) Set Data Rate
1550
1551 (% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
1552
1553 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%)  Set transmit frequency to 868.4Mhz
1554
1555 (% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1556
1557 (% style="background-color:#dcdcdc" %)**AT+RX2DR=5**  (%%) Set RX2DR to match the downlink DR from server. see below
1558
1559 (% 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.
1560
1561 (% style="background-color:#dcdcdc" %)**ATZ**       (%%) Reset MCU
1562
1563
1564 (% style="color:red" %)**Note:**
1565
1566 (((
1567 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1568 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1569 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.
1570 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
1571
1572
1573 )))
1574
1575 (% 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" %)​
1576
1577
1578
1579 = 6. FAQ =
1580
1581
1582 == 6.1 How to upgrade the image? ==
1583
1584
1585 (((
1586 The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
1587 )))
1588
1589 * (((
1590 Support new features
1591 )))
1592 * (((
1593 For bug fix
1594 )))
1595 * (((
1596 Change LoRaWAN bands.
1597 )))
1598
1599 (((
1600 Below shows the hardware connection for how to upload an image to RS485-LN:
1601 )))
1602
1603 (% 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"]]
1604
1605 (% title="Click and drag to resize" %)​
1606
1607 (((
1608 (% 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]].
1609
1610
1611 )))
1612
1613 (((
1614 (% 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]].
1615
1616
1617 )))
1618
1619 (((
1620 (% style="color:blue" %)**Step3**(%%)**: **Open flashloader; choose the correct COM port to update.
1621
1622
1623 )))
1624
1625 (((
1626 (((
1627 (((
1628 (% 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.
1629 )))
1630 )))
1631 )))
1632
1633
1634 (% 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" %)​
1635
1636
1637 (% 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" %)​
1638
1639
1640 (% 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" %)​
1641
1642
1643 (% 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:**
1644
1645 (% 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" %)​
1646
1647
1648
1649 == 6.2 How to change the LoRa Frequency Bands/Region? ==
1650
1651
1652 User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1653
1654
1655
1656 == 6.3 How many RS485-Slave can RS485-LN connects? ==
1657
1658
1659 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"]].
1660
1661
1662
1663 == 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
1664
1665
1666 When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
1667
1668 Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
1669
1670
1671
1672 == 6.5 Can i use point to point communication for RS485-LN? ==
1673
1674
1675 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]].
1676
1677
1678
1679 == 6.6 How to Use RS485-LN  to connect to RS232 devices? ==
1680
1681
1682 [[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/]]
1683
1684
1685 == 6.7 How to judge whether there is a problem with the set COMMAND ==
1686
1687 = Introduce: =
1688
1689
1690 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:
1691
1692 1. Test if Modbus-MTU works with PC commands.
1693 1. Check if RS485-LN sent the expected command to Mobus-MTU
1694 1. Check if Modbus-MTU return back the expected result to RS485-LN.
1695 1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output.
1696
1697 [[image:image-20221130104310-1.png||height="380" width="680"]]
1698
1699
1700 Example Connection:
1701
1702 [[image:image-20221130104310-2.png]]
1703
1704
1705 = Set up PC to monitor RS485 network =
1706
1707 == With Serial tool ==
1708
1709 Note: Receive and send set to hex mode
1710
1711 [[image:image-20221130104310-3.png||height="616" width="714"]]
1712
1713
1714 == With ModRSsim2: ==
1715
1716 (1)Select serial port MODBUS RS-232
1717
1718 [[image:image-20221130104310-4.png||height="390" width="865"]]
1719
1720
1721 (2)Click the serial port icon
1722
1723 [[image:image-20221130104310-5.png||height="392" width="870"]]
1724
1725
1726 (3)After selecting the correct serial port and baud rate, click ok
1727
1728 [[image:image-20221130104310-6.png]]
1729
1730 (4)Click the comms.
1731
1732 [[image:image-20221130104310-7.png||height="376" width="835"]]
1733
1734 = Run RS485-LN/BL command and monitor if it is correct. =
1735
1736 == Example – Test the CFGDEV command ==
1737
1738 RS485-LN sent below command:
1739
1740 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.
1741
1742
1743 We can see the output from the Serial port tool to analyze. And check if they are expected result.
1744
1745 [[image:image-20221130104310-8.png||height="214" width="797"]]
1746
1747 We can also use ModRSsim2 to see the output.
1748
1749 [[image:image-20221130104310-9.png||height="531" width="729"]]
1750
1751
1752
1753 == Example – Test CMD command sets. ==
1754
1755 Run AT+SENSORVALUE=1 to test the CMD commands set in RS485-LN.
1756
1757
1758 Serial port tool:
1759
1760 [[image:image-20221130104310-10.png||height="339" width="844"]]
1761
1762 ModRSsim2:
1763
1764 [[image:image-20221130104310-11.png||height="281" width="962"]]
1765
1766
1767
1768 = **Test with PC** =
1769
1770 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.
1771
1772
1773 Or User can send the working commands set in PC serial tool to Dragino Support to check what should be configured in RS485-LN.
1774
1775 Connection method：
1776
1777 [[image:image-20221130104310-12.png]]
1778
1779 Link situation:
1780
1781 [[image:image-20221130104310-13.png||height="458" width="486"]]
1782
1783 [[image:image-20221130104310-14.png||height="371" width="823"]]
1784
1785 = 7. Trouble Shooting =
1786
1787
1788 == 7.1 Downlink doesn't work, how to solve it? ==
1789
1790
1791 Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
1792
1793
1794
1795 == 7.2 Why I can't join TTN V3 in US915 /AU915 bands? ==
1796
1797
1798 It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1799
1800
1801
1802 = 8. Order Info =
1803
1804
1805 (% style="color:blue" %)**Part Number: RS485-LN-XXX**
1806
1807 (% style="color:blue" %)**XXX:**
1808
1809 * (% style="color:red" %)**EU433**(%%):  frequency bands EU433
1810 * (% style="color:red" %)**EU868**(%%):  frequency bands EU868
1811 * (% style="color:red" %)**KR920**(%%):  frequency bands KR920
1812 * (% style="color:red" %)**CN470**(%%):  frequency bands CN470
1813 * (% style="color:red" %)**AS923**(%%):  frequency bands AS923
1814 * (% style="color:red" %)**AU915**(%%):  frequency bands AU915
1815 * (% style="color:red" %)**US915**(%%):  frequency bands US915
1816 * (% style="color:red" %)**IN865**(%%):  frequency bands IN865
1817 * (% style="color:red" %)**RU864**(%%):  frequency bands RU864
1818 * (% style="color:red" %)**KZ865**(%%):  frequency bands KZ865
1819
1820
1821 = 9.Packing Info =
1822
1823
1824 **Package Includes**:
1825
1826 * RS485-LN x 1
1827 * Stick Antenna for LoRa RF part x 1
1828 * Program cable x 1
1829
1830 **Dimension and weight**:
1831
1832 * Device Size: 13.5 x 7 x 3 cm
1833 * Device Weight: 105g
1834 * Package Size / pcs : 14.5 x 8 x 5 cm
1835 * Weight / pcs : 170g
1836
1837
1838 = 10. FCC Caution for RS485LN-US915 =
1839
1840
1841 (((
1842 Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
1843 )))
1844
1845 (((
1846 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.
1847 )))
1848
1849 (((
1850
1851 )))
1852
1853 (((
1854 (% style="color:red" %)**IMPORTANT NOTE:**
1855 )))
1856
1857 (((
1858 (% 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:
1859 )))
1860
1861 (((
1862 —Reorient or relocate the receiving antenna.
1863 )))
1864
1865 (((
1866 —Increase the separation between the equipment and receiver.
1867 )))
1868
1869 (((
1870 —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
1871 )))
1872
1873 (((
1874 —Consult the dealer or an experienced radio/TV technician for help.
1875 )))
1876
1877 (((
1878
1879 )))
1880
1881 (((
1882 (% style="color:red" %)**FCC Radiation Exposure Statement:**
1883 )))
1884
1885 (((
1886 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.
1887 )))
1888
1889
1890
1891 = 11. Support =
1892
1893
1894 * (((
1895 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.
1896 )))
1897 * (((
1898 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]].
1899
1900
1901
1902 )))

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