Changes for page HP0D -- Full Hotspot for Helium User Manual

Last modified by Xiaoling on 2024/10/21 15:44

From 174.4 to 174.3 From 174.26 to 174.25

From version 174.25

edited by Xiaoling
on 2022/07/27 17:54

Change comment: There is no comment for this version

To version 174.4

edited by Xiaoling
on 2022/07/27 15:36

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@@ -56,8 +56,6 @@
  * Power Input: 12V 2A, DC
--
--
  == **1.3 Features** ==
  * Open-Source Linux system
@@ -76,8 +76,6 @@
  * [[Remote.it remote management>>url:https://wiki.dragino.com/index.php?title=Reverse_SSH_Access#Use_Remote.it_service]].
--
--
  == **1.4 Label info and login name** ==
@@ -88,15 +88,13 @@
  === 1.4.1 Label information: ===
--(((
--**Device hostname:**        (% style="background-color:yellow" %)dragino-xxxxxx(%%)
--**Band**:                             (% style="background-color:yellow" %)US915/AU915/AS923_1-AS923_4/KR920/EU868/IN865/RU864 (%%)
--**Miner animal name**:     (% style="background-color:yellow" %)xxx-xxx-xxx (%%)
--**Miner address**:             (% style="background-color:yellow" %)12xxxxxx (%%)
--**Eth MAC address**:         (% style="background-color:yellow" %)A8: 40: 41: EF: FE: CD (%%)
--**Login**:                           (% style="background-color:yellow" %) root/d59f2d5b (the root is the Login account for the Web-UI and SSH.) (%%)
--**SN**:                                (% style="background-color:yellow" %) device serial number.
--)))
++**Device hostname:**       (% class="mark" %)dragino-xxxxxx(%%)
++**Band**:                            (% class="mark" %)US915/AU915/AS923_1-AS923_4/KR920/EU868/IN865/RU864(%%)
++**Miner animal name**:    (% class="mark" %)xxx-xxx-xxx(%%)
++**Miner address**:            (% class="mark" %)12xxxxxx(%%)
++**Eth MAC address**:        (% class="mark" %)A8: 40: 41: EF: FE: CD(%%)
++**Login**:                           (% class="mark" %)root/d59f2d5b (the root is the Login account for the Web-UI and SSH.)(%%)
++**SN**:                                (% class="mark" %)device serial number.
@@ -103,9 +103,7 @@
  = **2. Quick Start & Onboarding** =
--(((
  The HP0D is configured as a Wi-Fi Access Point by factory default. You can access and configure the HPD after connecting to its Wi-Fi network, or via its WAN Ethernet port.
--)))
  == **2.1  Connect HP0D Web UI** ==
@@ -122,12 +122,12 @@
  (% class="box infomessage" %)
  (((
--      called              :  (% style="color:red" %)**//HPD-dragino-xxxxxx//**
++      called              :  **//HPD-dragino-xxxxxx//**
  )))
  (% class="box infomessage" %)
  (((
--      with password:  (% style="color:red" %)**//dragino+dragino//**(%%)
++      with password:  **//dragino+dragino//**
  You can use a PC to connect to this Wi-Fi network. The PC will get an IP address 10.130.1.xxx and the HP0D has the default  IP 10.130.1.1
  )))
@@ -139,11 +139,9 @@
  === **2.1.2 Connect via HP0D hostname** ===
--(((
--Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address. If your PC(Windows/Mac/Ubuntu) connects to the same network with the HP0D, you can access the HP0D Web-UI via HP0D's hostname.
--)))
++Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address. If your PC(Windows/Mac/Ubuntu) connects to the same network with the HP0D, you can access the HP0D Web-UI via HP0D’s hostname.
--                                                                Like: (% style="background-color:yellow" %)__**//http:~/~/dragino-4ba54a//**__
++                                                                Like: (% class="mark" %)__**//http:~/~/dragino-4ba54a//**__
  [[image:1651804629009-699.png]]
@@ -153,14 +153,10 @@
  === **2.1.3 Connect via Ethernet Port** ===
--(((
--//Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address from your router. In the router's management portal, you should be able to find what IP address the router has assigned to the HP0D.//
--)))
++//Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address from your router. In the router’s management portal, you should be able to find what IP address the router has assigned to the HP0D.//
--(((
  //**If you get the IP address from the router, like: (% class="mark" %)10.130.2.42(%%), you can use this IP address to connect the WEB UI or SSH access of HP0D.**//
--)))
  [[image:1651804782523-623.png]]
@@ -218,7 +218,7 @@
  )))
  (((
--Mobile APP will get info from the onboarding server. If the MAC address doesn't appear, it means the network connection of the mobile to the onboarding server might have an issue.
++Mobile APP will get info from the onboarding server. If the MAC address doesn’t appear, it means the network connection of the mobile to the onboarding server might have an issue.
  )))
@@ -260,21 +260,15 @@
  )))
  (((
--(((
  (% style="color:red" %)**Note: Please refer to more detailed Settings**
  )))
--)))
  (((
--(((
  [[https:~~/~~/docs.helium.com/troubleshooting/network-troubleshooting/>>url:https://docs.helium.com/troubleshooting/network-troubleshooting/]]
  )))
--)))
  (((
--(((
  [[https:~~/~~/www.youtube.com/watch?v=GKusVC7ovrE>>url:https://www.youtube.com/watch?v=GKusVC7ovrE]]
--)))
@@ -288,7 +288,6 @@
  [[image:1651828687205-178.png||height="323" width="657"]]
--
  == **3.2 Check the LoRaWAN Server Address** ==
@@ -295,10 +295,8 @@
  [[image:image-20220607160428-1.png||height="472" width="654"]]
--
  == **3.2.1 Configure the Secondary LoRaWAN Server** ==
--
  [[image:image-20220607161130-2.png||height="501" width="1112"]]
@@ -309,17 +309,16 @@
++
  == **3.3 Check Miner configuration** ==
  [[image:image-20220506181408-1.png||height="451" width="513"]]
--
  (((
--(% style="color:red" %)//**Note: Check the Region and Height, the default height is greater than 1, if it is 1 please Click the mid button of Update, and then wait 10mins to check here.**//
++//**Note: Check the Region and Height, the default height is greater than 1, if it is 1 please Click the mid button of Update, and then wait 10mins to check here.**//
--
  == **//3.4 Check the Miner state//** ==
@@ -326,11 +326,12 @@
  [[image:image-20220531171836-9.png||height="776" width="1155"]]
--(((
--(% style="color:red" %)//**Note: Absorption status can show whether the hotspot is working properly The p2p network can see how your hotspot is interacting with the surrounding hotspots usually, the nat_type should be '**//(% style="color:blue" %)**//none'//**
--)))
++//**Note: Absorption status can show whether the hotspot is working properly**//
++//**          The p2p network can see how your hotspot is interacting with the surrounding hotspots**//
++           //usually, the nat_type should be '**none'**//
++
  )))
@@ -348,13 +348,12 @@
  )))
  (((
--//The user needs to connect the antenna cable's SMA connector to the HP03 and connect the N-Type connector to the antenna and install it as below~://
++//The user needs to connect the antenna cable’s SMA connector to the HP03 and connect the N-Type connector to the antenna and install it as below~://
  )))
  (((
  [[image:1651832205608-998.png||height="349" width="198"]]
--
  )))
@@ -361,21 +361,13 @@
  = **5. SSH Access for Linux console** =
--(((
  //Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address from your router.//
--)))
--(((
  //In the router's management portal, you should be able to find what IP address the router has assigned to the HP0D.//
--)))
--(((
  //You can use this IP or hostname of HP0D to connect the WEB UI or SSH access of HP0D.//
--)))
--(((
  //Make sure your PC and the HP0D are in the same network, the use an SSH tool (such as **[[putty>>url:http://www.chiark.greenend.org.uk/~~sgtatham/putty/download.html]]**) to access it.//
--)))
  Below are screenshots:
@@ -409,23 +409,20 @@
  [[image:image-20220608202118-2.png]]
--
  = **6. How to change the Wireless function of HP0D** =
--
  //The wireless function is configured as AP by default and the web page does not support configuration,//
  //if you want to configure it as STA(client)connection mode,//
--//you can configure your WiFi info on the** (% style="color:blue" %)/Network/WiFi (%%)**page.//
++//you can configure your WiFi info on the** /Network/WiFi **page.//
--(% style="color:red" %)**//Note: the wireless state is as AP//**
++**//Note: the wireless state is as AP//**
  [[image:image-20220531170243-5.png||height="469" width="967"]]
--
  == **6.1 Access WiFi configuration page** ==
@@ -432,7 +432,6 @@
  [[image:image-20220531165803-2.png]]
--
  == **6.2 Enter your WiFi information and save** ==
@@ -439,14 +439,11 @@
  [[image:image-20220531165958-3.png]]
--
  == **6.3 Change the WiFi mode.** ==
  [[image:image-20220531170131-4.png]]
--
--
  == **6.4 Wait system to restart** ==
@@ -453,10 +453,9 @@
  [[image:image-20220531170501-7.png]]
--(% style="color:red" %)//**Note: When the time remaining is finished it will turn to the home page.**//
++//**Note: When the time remaining is finished it will turn to the home page.**//
--
  == **6.5 Check the STA state** ==
@@ -463,7 +463,6 @@
  [[image:image-20220531170705-8.png||height="484" width="990"]]
--
  = **7. Trouble Shootings** =
  == **7.1 How to get a wallet address?** ==
@@ -472,7 +472,6 @@
  **//Download the helium Hotspots APP on the Apple or Google Play store to generate your own wallet.//**
--
  == **7.2 Onboarding ~-~- Unable to access Web-UI ~-~-> Miner** ==
@@ -483,7 +483,6 @@
  (((
  //If you first boot the device where you need to wait for 10 mins for the initialization connection to the Helium server.//
--
  )))
@@ -500,7 +500,6 @@
  **//It might relate to the network which might be up to 10mins.//**
--
  == **7.4 Onboarding – Bad Gateway** ==
@@ -510,7 +510,6 @@
  //**This is caused by the process leading too long which just needs to refresh the page.**//
--
  == **7.5 Onboarding ~-~- Why did QR Code generate aways fail?** ==
@@ -520,20 +520,17 @@
  (((
  //**This may be related to the current block height, if the device is synchronizing to the latest height or if the device block height is much lower than the current height as the above picture like '1 1', the QR code generation may fail.**//
--
  )))
  == **7.6 Onboarding ~-~- Why is the QR Code not quite the same as the manual?** ==
--
  [[image:1651832742262-209.png||height="297" width="365"]]
  (((
--//**Please ensure that you enter the correct wallet address and that your network is up and running, the user can click the button of (% style="color:red" %)‘Clean’(%%) to re-generate the QR Code.**//
++//**Please ensure that you enter the correct wallet address and that your network is up and running, the user can click the button of ‘Clean’ to re-generate the QR Code.**//
--
  )))
@@ -544,13 +544,12 @@
  (((
--//**If you see the MAC Address shows the (% style="color:red" %)‘Unknown’(%%) where is due to the provisioning error, please contact us to help you solve it.**//
++//**If you see the MAC Address shows the ‘Unknown’ where is due to the provisioning error, please contact us to help you solve it.**//
--
  )))
--== **7.8 Onboarding – MAC address is being refreshed after scanning the QR Code** ==
++== 7.8 Onboarding – MAC address is being refreshed after scanning the QR Code ==
  (((
@@ -560,31 +560,28 @@
  )))
  (((
--//**If you don't see the MAC address, make sure your mobile has a good internet connection.**//
++//**If you don’t see the MAC address, make sure your mobile has a good internet connection.**//
  )))
  [[image:1651832880009-473.png]]
++== //**7.9 HP0D Web ~-~-> Miner ~-~-> Version shows ‘short’**// ==
--== **7.9 HP0D Web ~-~-> Miner ~-~-> Version shows ‘short’** ==
--
  **//This is caused by the server connection delay, which does not affect the regular use.//**
  [[image:1651832959907-357.png]]
--
  == **7.10 Mobile APP crash after scanning the QR Code?** ==
  * //**Make sure you have input the correct Wallet address to generate QR Code.**//
  * //**Make sure your mobile app uses the same wallet address as the one to generate QR Code.**//
--* //**Make sure your mobile app's relevant permission is enabled.**//
++* //**Make sure your mobile app’s relevant permission is enabled.**//
  * //**Known: The Android 11 version may cause this kind of issue.**//
--
  == **7.11 Why the frequency/region is not the same as what I purchased?** ==
@@ -595,7 +595,6 @@
  (((
  //**If your HP0D Web-UI – Miner region is not the same as the shell labels, please contact our support team that will solve this issue for you.**//
--
  )))
@@ -609,7 +609,6 @@
  (((
  [[https:~~/~~/docs.helium.com/lorawan-on-helium/frequency-plans>>url:https://docs.helium.com/lorawan-on-helium/frequency-plans]]
--
  )))
@@ -619,7 +619,6 @@
  //We do not recommend doing this, it may damage your device//
--
  == **7.14 Low Reward and not transmit issue** ==
@@ -630,7 +630,6 @@
  [[image:image-20220527114519-1.png||height="579" width="851"]]
--
  == **7.15 Why is my miner version not the latest** ==
@@ -646,9 +646,8 @@
           **// Use the "draginoups" command to check//**
--(% style="color:red" %)**//Note: How to access the hotspot CLI refer to ( Such as //**//[[Step 5.>>url:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20All%20Gateway%20models/HP0D#H5.SSHAccessforLinuxconsole]]** )**//
++**//Note: How to access the hotspot CLI refer to ( Such as //**//[[Step 5.>>url:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20All%20Gateway%20models/HP0D#H5.SSHAccessforLinuxconsole]]** )**//
--
  [[image:image-20220601101358-1.png]]
@@ -655,7 +655,6 @@
  == **7.16 Why is my miner running down?** ==
--
  //the default, the Miner is managed by docker.//
  //If you find the miner is offline where the miner is running down.//
@@ -663,33 +663,27 @@
  **What You can do?**
--(% style="color:blue" %)**1. Reboot the hotspot and check again.**
++**~1. Reboot the hotspot and check again.**
  //Usually, if the miner is just down, then a reboot is the quickest way//
--(% style="color:blue" %)**2. Reinstall the Miner manually.**
++**2. Reinstall the Miner manually.**
  //If rebooting does not solve the problem you can reinstall MINER by one of the following methods//
--(((
        **1). There is an update button in the middle of the miner page, click this button and then the miner will be reinstalled.**
--)))
--(((
--      **2). Run the (% style="color:red" %)"//minerup updat//e"(%%) command to reinstall the miner**
--)))
++      **2). Run the "//minerup updat//e" command to reinstall the miner**
  [[image:image-20220610094825-2.png||height="457" width="835"]]
--
  [[image:image-20220610094755-1.png||height="706" width="834"]]
--
  == **7.17 More commands for debugging.** ==
@@ -705,66 +705,50 @@
  //3). Is the height gap between local height and remote height kept within 100//
--(((
--(% style="color:red" %)**//Note: You can find the above three points on the Miner page, and If you are familiar with the Linux command line you can use the following command//**
--)))
++**//Note: You can find the above three points on the Miner page, and //**
++**//If you are familiar with the Linux command line you can use the following command//**
++
  (% class="box infomessage" %)
  (((
--(((
  minerup update  #~-~-> reinstall miner but not clearing memory
  minerup flush     #~-~->  reinstall miner and clear memory
  minerup snap     #~-~->  load a snap_short to sync the block height
  minerup gap      #~-~->  check the height between local and remote.
  draginoup          #~-~->  check the miner version gap between local and remote.
--)))
--(((
--
--)))
--(((
  doker ps            #~-~-> show the miner running state
  miner versions   #~-~-> show the miner  version
  )))
--)))
--
  == **7.18 Why does my hotspot not have some of the features described in this WiKi** ==
--(((
  //**This is the result of the OTA not being updated in time**//
--)))
--(((
  //**You can reboot your hotspot or upgrade these packages manually.**//
--)))
  (% class="box infomessage" %)
  (((
--(((
  **apt update**
  **apt install dragino***
  )))
--)))
--
  = **8. How to flash a new OS for the hotspot, the hotspot's setting will be factory settings** =
--
  The hotspot is based on the Rpi-4B so the OS has been installed on the SD card.
  So you have to re-flash the image into the SD card.
-- (% style="background-color:yellow" %)**Warning:  Do not reset unless necessary**
++**Warning:  Do not reset unless necessary**
-- (% style="color:blue" %)//**Preparations:**//
++//**Preparations:**//
 . //Open the HP0D shell, and take out the SD card from the Raspberry PI 4B (Make sure the SD card is empty )//
@@ -777,7 +777,7 @@
 . //SD Card **[[formatter>>url:http://repo.dragino.com/release/tool/PanasonicSDFormatter.zip]]**//
--(% style="color:blue" %)**HP0D's enclosure**
++**HP0D's enclosure**
  [[image:image-20220615204902-1.png||height="633" width="918"]]
@@ -787,41 +787,37 @@
--=== (% style="color:blue" %)**Step 1.  Formatting the SD Card**(%%) ===
++=== **Step 1.  Formatting the SD Card** ===
  [[image:image-20220609111027-9.png]]
++=== **Step 2. Select the OS image ** ===
--=== (% style="color:blue" %)**Step 2. Select the OS image **(%%) ===
--
  [[image:image-20220609104907-8.png]]
++=== **Step 3. Select the target ** ===
--=== (% style="color:blue" %)**Step 3. Select the target **(%%) ===
--
  [[image:image-20220609104637-2.png]]
  [[image:image-20220609104701-3.png]]
++=== **Step 4. Flash start** ===
--=== (% style="color:blue" %)**Step 4. Flash start**(%%) ===
--
  [[image:image-20220609104727-4.png]]
  [[image:image-20220609104741-5.png]]
++=== **Flash Complete** ===
--=== (% style="color:blue" %)**Flash Complete**(%%) ===
--
  [[image:image-20220609104415-1.png]]
@@ -828,10 +828,8 @@
  == **Step 4. Re-install the SD card into the hotspot and boot it** ==
--
  == **Step 5. Configure the correct region for the miner** ==
--
  **by the default, the factory settings apply to the US915.**
  **if your region is not the US915, you have to configure the correct region for the miner.**
@@ -842,18 +842,12 @@
  (% class="box infomessage" %)
  (((
--(((
  ~#~##update the software of dragino
--)))
--(((
  apt update
--)))
--(((
  apt install dragino*
  )))
--)))
  [[image:image-20220609150452-2.png||height="348" width="909"]]
@@ -861,51 +861,35 @@
  (% class="box infomessage" %)
  (((
--(((
  ~#~##configure the correct region for the miner and update it
--)))
--(((
  uci set miner.general.region=<Region; Such as AS923_1/AU915/US915/EU868/IN865>
--)))
--(((
  uci commit miner
--)))
--(((
  minerup update
  )))
--)))
  [[image:image-20220609151513-5.png]]
--
  (% class="box infomessage" %)
  (((
--(((
  ~#~##check the miner version
--)))
--(((
  draginoups
  )))
--)))
  [[image:image-20220609151419-3.png]]
--
  (% class="box infomessage" %)
  (((
--(((
  ~#~##unblock the function of wireless
  rfkill unblock wlan
  uci set wireless.general.mode=ap
  uci commit wireless
  )))
--)))
  [[image:image-20220609161204-1.png]]
@@ -913,13 +913,12 @@
  = **9. How does the HP0D access to the network via a USB 4G Dongle** =
--
  We have reserved enough space inside the HP0D to use a USB 4G Dongle,
  so you can install a USB 4G Dongle in order for the hotspot to access the network via 4G.
--(% style="color:green" %)//**Preparations:**//
++//**Preparations:**//
  //**1). A USB 4G Dongle, Such as HUAWEI E3327,ZTE...**//
@@ -928,34 +928,25 @@
  //**3). open the hotspot's shell.**//
--
  == **9.1.  Open the HP0D shell and access the USB 4G Dongle into the Rpi.** ==
--
  [[image:image-20220627153334-2.png]]
--
  == **9.2. Checking the USB 4G Dongle network** ==
--
--(((
  We have installed drivers for common USB 4G Dongle,
--)))
--(((
  and managed by NetworkManager, once hp0d detects an available USB 4G Dongle it will try to dial up the range network
--)))
--(% style="color:blue" %)**//HUAWEI-E3327//**
++//HUAWEI-E3327//
  [[image:image-20220627154526-9.png||height="762" width="725"]]
++//ZTE//
--(% style="color:blue" %)**//ZTE//**
--
  [[image:image-20220627154201-5.png]]
@@ -963,22 +963,18 @@
  = **10. PoE introduction** =
--(((
--//The HP0D is use the (% style="color:blue" %)**IEEE 802.3 af compliant PoE port**(%%) (input 44 ~~ 57 v, output 12V)//
--)))
++//The HP0D is use the **IEEE 802.3 af compliant PoE port** (input 44 ~~ 57 v, output 12V)//
--(((
  //So you can use the PoE //switches// or PoE injector to power the device.//
--)))
--(((
--(% style="color:red" %)**Note: The RJ45 Indicator light only represents the PoE power supply, so when you use DC to power the hotspot and the RJ45 indicator light is off   ~-~--> this is normal**
--)))
++**Note: The RJ45 Indicator light only represents the PoE power supply, **
++**so when you use DC to power the hotspot and the RJ45 indicator light is off   ~-~--> this is normal**
-- (% style="background-color:yellow" %)**Wiring schematic:**
++**Wiring schematic:**
++
  [[image:image-20220616143347-1.png]]
@@ -986,14 +986,11 @@
  = **11. OTA Version Info** =
--
  == **When does the OTA update happen?** ==
  **//HP0D will check OTA update on a) Every Booting. b) Every Night. Below is the OTA update version info//**
--
--
  == **# 2022/05/14** ==
@@ -1002,25 +1002,18 @@
 . //Add Miner version mark.//
 . //Add fast sync if miner GAP is large//
--
--
  == **# 2022/05/18** ==
 . //Update minerup to speed up synchronized blocks//
--
--
  == **# 2022/05/24** ==
 . //Update to the latest miner version: miner-arm64_2022.05.24.0_GA//
--
--
  == **# 2022/05/31** ==
--
 . //Add WiFi STA icon display//
 . //Optimize AP icon display//
 . //Optimize home icon display//
@@ -1027,11 +1027,8 @@
 . //Fix for Miner icon URL bug//
 . //Add the secondary server configuration//
--
--
  = **12. Supports** =
--
  (((
  **//If you are experiencing issues and can’t solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
  )))
@@ -1039,29 +1039,24 @@
  (((
  **//With your question as detailed as possible. We will reply and help you in the shortest.//**
--
  )))
  = **13. Order Info** =
++(% style="color:#0000ff" %)**HP0D-XXX**
--(% style="color:blue" %)**HP0D-XXX**
++(% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
--(% style="color:blue" %)**XXX**(%%): Frequency Band
++* **AS923**: LoRaWAN AS923 band
++* **AU915**: LoRaWAN AU915 band
++* **EU868**: LoRaWAN EU868 band
++* **KR920**: LoRaWAN KR920 band
++* **US915**: LoRaWAN US915 band
++* **IN865**: LoRaWAN IN865 band
--* (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
--* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
--* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
--* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
--* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
--* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
--
--
--
  = **14. Manufacturer Info** =
--
  (((
  **Shenzhen Dragino Technology Development co. LTD**
  )))
@@ -1079,7 +1079,6 @@
  = **15. FCC Warning** =
--
  (((
  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:
  )))

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