Changes for page RS485-LN – RS485 to LoRaWAN Converter User Manual

Last modified by Bei Jinggeng on 2025/01/16 11:36

From version < 65.1 >

edited by Xiaoling
on 2022/07/04 11:23

To version < 68.5 >

edited by Xiaoling
on 2022/08/18 14:39

Change comment: There is no comment for this version

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@@ -12,11 +12,6 @@
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  **Table of Contents:**
  {{toc/}}
@@ -74,6 +74,7 @@
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++
  == 1.2 Specifications ==
@@ -85,11 +85,13 @@
  ** Idle: 32mA@12v
  ** 20dB Transmit: 65mA@12v
++
  **Interface for Model:**
  * RS485
  * Power Input 7~~ 24V DC.
++
  **LoRa Spec:**
  * Frequency Range:
@@ -116,6 +116,7 @@
  == 1.3 Features ==
++
  * LoRaWAN Class A & Class C protocol (default Class C)
  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
  * AT Commands to change parameters
@@ -130,6 +130,7 @@
  == 1.4 Applications ==
++
  * Smart Buildings & Home Automation
  * Logistics and Supply Chain Management
  * Smart Metering
@@ -142,11 +142,14 @@
  == 1.5 Firmware Change log ==
++
  [[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
++
  == 1.6 Hardware Change log ==
++
  (((
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  (((
@@ -157,6 +157,7 @@
  v1.0: Release
  )))
++
  )))
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@@ -163,6 +163,7 @@
  = 2. Power ON Device =
++
  (((
  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
@@ -175,6 +175,7 @@
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++
  )))
@@ -182,16 +182,19 @@
  == 3.1 How it works? ==
++
  (((
  (((
  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.
  )))
++
  )))
  == 3.2 Example to join LoRaWAN network ==
++
  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.
  (% 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" %)
@@ -211,6 +211,8 @@
  (((
  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:
++
++
  )))
  (((
@@ -261,8 +261,10 @@
  (% 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" %)
++
  == 3.3 Configure Commands to read data ==
++
  (((
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@@ -272,15 +272,17 @@
  (((
  (((
--(% 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
++(% 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**
  )))
++
  )))
  )))
--=== 3.3.1 onfigure UART settings for RS485 or TTL communication ===
++=== 3.3.1 Configure UART settings for RS485 or TTL communication ===
++
  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:
  (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
@@ -346,9 +346,12 @@
  === 3.3.2 Configure sensors ===
++
  (((
  (((
--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.
++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.
++
++
  )))
  )))
@@ -373,6 +373,7 @@
  === 3.3.3 Configure read commands for each sampling ===
++
  (((
  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.
@@ -431,11 +431,13 @@
  (% 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" %)
++
  * (% style="color:#037691" %)**Grab a section**
  (% 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" %)
++
  * (% style="color:#037691" %)**Grab different sections**
  (% 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" %)
@@ -446,6 +446,7 @@
  === 3.3.4 Compose the uplink payload ===
++
  (((
  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.**
@@ -504,7 +504,7 @@
  DATA3=the rest of Valid value of RETURN10= **30**
--(% 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:
++(% 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:**
     ~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.
@@ -523,6 +523,7 @@
  === 3.3.5 Uplink on demand ===
++
  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.
  Downlink control command:
@@ -535,6 +535,7 @@
  === 3.3.6 Uplink on Interrupt ===
++
  RS485-LN support external Interrupt uplink since hardware v1.2 release.
  (% 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" %)
@@ -542,6 +542,7 @@
  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.
++
  == 3.4 Uplink Payload ==
@@ -550,8 +550,10 @@
  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
++
  == 3.5 Configure RS485-LN via AT or Downlink ==
++
  (((
  User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands
  )))
@@ -573,13 +573,17 @@
  )))
++
  === 3.5.1 Common Commands ===
++
  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]]
--=== 3.5.2 Sensor related commands ===
++=== 3.5.2 Downlink Response(Since firmware v1.4) ===
++
++
  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.
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@@ -595,8 +595,9 @@
  ==== (% style="color:blue" %)**RS485 Debug Command**(%%) ====
++
  (((
--This command is used to configure the RS485 devices; they won’t be used during sampling.
++This command is used to configure the RS485 devices; they won't be used during sampling.
  )))
  * (((
@@ -651,7 +651,7 @@
  (((
--**Example 1**    ~-~-> Configure without ask for uplink (YY=0)
++(% style="color:blue" %)**Example 1:**  (%%)  ~-~-> Configure without ask for uplink (YY=0)
  )))
  (((
@@ -689,7 +689,7 @@
  )))
  (((
--**Example 2**        ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
++(% style="color:blue" %)**Example 2:**  (%%)      ~-~-> Configure with requesting uplink and original downlink command (**YY=FF**)
  )))
  (((
@@ -717,6 +717,7 @@
  ==== (% style="color:blue" %)**Set Payload version**(%%) ====
++
  (((
  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.
  )))
@@ -745,6 +745,7 @@
  ==== (% style="color:blue" %)**Set RS485 Sampling Commands**(%%) ====
++
  (((
  AT+COMMANDx or AT+DATACUTx
  )))
@@ -772,10 +772,14 @@
  (((
  **0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
++
++
  )))
  (((
  (% style="color:red" %)**Note**(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
++
++
  )))
  (((
@@ -825,6 +825,7 @@
  ==== (% style="color:blue" %)**Fast command to handle MODBUS device**(%%) ====
++
  (((
  **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]].
  )))
@@ -866,6 +866,7 @@
  ==== (% style="color:blue" %)**RS485 command timeout**(%%) ====
++
  (((
  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.
  )))
@@ -919,6 +919,7 @@
  ==== (% style="color:blue" %)**Uplink payload mode**(%%) ====
++
  (((
  Define to use one uplink or multiple uplinks for the sampling.
  )))
@@ -955,6 +955,7 @@
  ==== (% style="color:blue" %)**Manually trigger an Uplink**(%%) ====
++
  (((
  Ask device to send an uplink immediately.
  )))
@@ -984,6 +984,7 @@
  ==== (% style="color:blue" %)**Clear RS485 Command**(%%) ====
++
  (((
  The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
@@ -1030,6 +1030,7 @@
  ==== (% style="color:blue" %)**Set Serial Communication Parameters**(%%) ====
++
  (((
  Set the Rs485 serial communication parameters:
  )))
@@ -1094,6 +1094,7 @@
  == 3.6 Listening mode for RS485 network ==
++
  (((
  This feature support since firmware v1.4
  )))
@@ -1100,6 +1100,8 @@
  (((
  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.
++
++
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@@ -1185,11 +1185,12 @@
  (((
  (((
--(% 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.
++(% 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.**
  )))
  )))
++
  == 3.7 Buttons ==
@@ -1202,6 +1202,7 @@
++
  == 3.8 LEDs ==
@@ -1213,15 +1213,20 @@
++
  = 4. Case Study =
++
  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]]
++
  = 5. Use AT Command =
++
  == 5.1 Access AT Command ==
++
  (((
  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.
  )))
@@ -1247,6 +1247,7 @@
  === 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
++
  If device has not joined network yet:
  * (% style="color:#037691" %)**AT+FDR**
@@ -1265,6 +1265,7 @@
  )))
++
  === 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===
@@ -1296,15 +1296,20 @@
 . Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
 . 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.
 . 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
++
++
  )))
  (% 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" %)
++
  = 6. FAQ =
++
  == 6.1 How to upgrade the image? ==
++
  (((
  The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
  )))
@@ -1323,14 +1323,16 @@
  Below shows the hardware connection for how to upload an image to RS485-LN:
  )))
--(% 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"]](% title="Click and drag to resize" %)
++(% 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"]]
++(% title="Click and drag to resize" %)
++
  (((
  (% 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]].
  )))
  (((
--(% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
++(% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Firmware/]].
  )))
  (((
@@ -1355,47 +1355,69 @@
  (% 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" %)
--(% 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:
++(% 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:**
  (% 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" %)
++
  == 6.2 How to change the LoRa Frequency Bands/Region? ==
++
  User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
++
  == 6.3 How many RS485-Slave can RS485-LN connects? ==
++
  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"]].
++
  == 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
++
  When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
  Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
++
  == 6.5 Can i use point to point communication for RS485-LN? ==
++
  Yes, please refer [[Point to Point Communication for RS485-LN>>Point to Point Communication for RS485-LN]].
++
++== 6.6 How to Use RS485-LN  to connect to RS232 devices? ==
++
++
++[[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/]]
++
++
++
  = 7. Trouble Shooting =
++
  == 7.1 Downlink doesn't work, how to solve it? ==
++
  Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]
++
  == 7.2 Why I can't join TTN V3 in US915 /AU915 bands? ==
++
  It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
++
  = 8. Order Info =
++
  (% style="color:blue" %)**Part Number: RS485-LN-XXX**
  (% style="color:blue" %)**XXX:**
@@ -1414,6 +1414,7 @@
++
  = 9.Packing Info =
@@ -1433,8 +1433,10 @@
++
  = 10. FCC Caution for RS485LN-US915 =
++
  (((
  Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
  )))
@@ -1487,9 +1487,13 @@
  = 11. Support =
++
  * (((
  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.
  )))
  * (((
  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]].
++
++
++
  )))

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