LPS8 LoRaWAN Gateway User Manual --- Update:2019-Oct-26 3 / 36
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1 Introduction
1.1 What is the LPS8
The LPS8 is an open source LoRaWAN Gateway. It lets you bridge LoRa wireless network to an IP network via
WiFi, Ethernet. The LoRa wireless allows users to send data and reach extremely long ranges at low data-rates.
The LPS8 uses Semtech packet forwarder and fully compatible with LoRaWAN protocol. It includes a SX1308
LoRa concentrator, which provides 10 programmable parallel demodulation paths.
LPS8 has pre-configured standard LoRaWAN frequency bands to use for different countries. User can also
customized the frequency bands to use in their own LoRa network.
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1.2 Specifications
Hardware System:
Linux Part:
400Mhz ar9331 processor
64MB RAM
16MB Flash
Interface:
10M/100M RJ45 Ports x 1
WiFi : 802.11 b/g/n
LoRaWAN Wireless
Power Input: 5V DC, 2A
USB 2.0 host connector x 1
WiFi Spec:
IEEE 802.11 b/g/n
Frequency Band: 2.4 ~ 2.462GHz
Tx power:
11n tx power : mcs7/15: 11db mcs0 : 17db
11b tx power: 18db
11g 54M tx power: 12db
11g 6M tx power: 18db
Wifi Sensitivity
11g 54M : -71dbm
11n 20M : -67dbm
LoRa Spec:
Up to -140 dBm sensitivity with SX1257 Tx/Rx front-end
70 dB CW interferer rejection at 1 MHz offset
Able to operate with negative SNR, CCR up to 9dB
Emulates 49 x LoRa demodulators and 1 x (G)FSK demodulator
Dual digital TX & RX radio front-end interfaces
10 programmable parallel demodulation paths
Dynamic data-rate (DDR) adaptation
True antenna diversity or simultaneous dual-band operation
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1.3 Features
Open Source OpenWrt system
Managed by Web GUI, SSH via WAN or WiFi
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Emulates 49x LoRa demodulators
LoRaWAN Gateway
10 programmable parallel demodulation paths
1.4 Hardware System Structure
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1.5 LPS8 Applications
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2 Access LPS8
2.1 Access and Configure the LPS8 via WiFi or Ethernet
The LPS8 is configured as a WiFi Access Point by factory default. You can access and configure the
LPS8 after connecting to its WiFi network, or via its WAN Ethernet port.
WiFi
At the first boot of LPS8, it will auto generate an open WiFi
network called dragino-xxxxxx
You can use a PC to connect to this WiFi network. The PC will
get an IP address 10.130.1.xxx and the LPS8 has the default IP
10.130.1.1
Ethernet
Alternatively, you can connect your PC to the LPS8 WAN port
via Ethernet cable and obtain an IP address via DHCP. Assume
the IP get from router is 192.168.1.3
Web Interface
Open a browser on the PC and type in the address:
http://10.130.1.1/ (Access via WiFi AP network)
or
http://192.168.1.3 or http://192.168.1.3:8000 (The web port has been changed to 8000
in WAN interface since firmware 5.3.xxx firmware)
You will see the login interface of LPS8 as shown below.
The account details for Web Login are:
User Name: root
Password: dragino
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3 Typical Network Setup
3.1 Overview
The LPS8 supports flexible network set up for different environments. This section describes the
typical network topology can be set in LPS8. The network set up includes:
WAN Port Internet Mode
WiFi Client Mode
WiFi AP Mode
3.2 Use WAN port to access Internet
By default, the LPS8 is set to use the WAN port to connect to an upstream network. When you
connect the LPS8’s WAN port to an upstream router, the LPS8 will get an IP address from the
router and have Internet access via the upstream router. The network status can be checked as
below:
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3.3 Access the Internet as a WiFi Client.
In the WiFi Client Mode, the LPS8 acts as a WiFi client and gets DHCP from an upstream router
via WiFi.
The steps to set up as a WiFi Client are as below:
Step1:
In Network -> Wireless, select Radio0 interface and scan.
Step2:
Select the Wireless AP and join:
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Step3:
In the Network->Wireless page, disable WiFi AP network. This step is important, the LPS WiFi
interface can only WiFi AP or WiFi Client mode at a time.
Note: After doing that, you will lose connection if your PC connects to the LPS8 via LPS8’s WiFi
network.
After successful association, the WiFi network interface can be seen in the same page:
3.4 Check Internet connection
You can use the diagnostics page to check and analyze the Internet connection as shown below.
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4 Example: Configure as a LoRaWAN gateway
LPS8 is fully compatible with LoRaWAN protocol. It uses the legacy Semtech Packet forwarder to
forward the LoRaWAN packets to server. The structure is as below.
This chapter describes how to use the LPS8 to work with
TheThingsNetwork (TTN) LoRaWAN Server (www.thethingsnetwork.org)
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4.1 Create a gateway in TTN Server
Step 1: Get a Unique gateway ID.
Every LPS8 has a unique gateway id. The ID can be found at LoRaWAN page:
The example gateway id is: a840411b8268ffff
Step 2: Sign up a user account in TTN server
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Step 3: Create a Gateway
Click on the Gateways icon to open the page below:
After creating the gateway, you can see the gateway info, as below.
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4.2 Configure LPS8 to connect to TTN
You can now configure the LPS8 to let it connect to TTN network.
Make sure your LPS8 has a working Internet Connection first.
Step1: Configure LPS8 to act as raw forwarder
Step2: Input server info and gateway id
Choose the correct the server address and gateway ID.
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Check Result
After making the above settings, the LPS8 should be able to connect to TTN. Below is the result
seen from TTN:
4.3 Configure frequency
After making the settings above, the LPS8 will be able to act as a LoRaWAN gateway.
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4.4 Add a LoRaWAN End Device
This section shows how to add a LoRaWAN End device to a LoRaWAN network and see the data
from TTN web site.
We use LT-33222-L IO Controller as a reference device - the setup for other LoRaWAN devices will
be similar.
Step 1: Create a Device definition in TTN with the OTAA keys from the example LT-33222-L IO
Controller device.
Three codes are required to define the device in TTN:
DEV EUI - Unique ID code for a particular device.
APP EUI - ID code for an Application defined in TTN.
APP Key - Unique key to secure communications with a particular device.
A set of these codes are stored in each device by the manufacturer as the default codes for that
particular device. Each device is shipped with a sticker with the default Device EUI as shown
below.
Note: You may be able to change these codes in a device by using a configuration facility on the
device e.g. the LT-33222 uses a serial port access and a series of AT commands. Changing the
codes may be necessary in the case where you have to use codes assigned by a LoRa WAN server.
For the TTN server, you can use the codes set in the device as in the following example.
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Select Add Application to open the screen below.
Note that there is an APP EUI already created by TTN, but this is not the one set in the device. To
add the APP EUI for the LT33222 device, select Manage EUIs and AddEUI, then enter the
required code.
Select Devices and Register Device to open the screen below.
Enter the Device EUI and APP KEY codes, then select the App EUI from the list.
Check that all three codes match those shown on the device label before saving the configuration.
Step 2: Power on LT-33222 device and it will automatically join the TTN network. After joining
successfully, it will start to upload messages to the TTN. Select the Data tab and you will see the
data appearing in the panel.
Note that it may take some time for the device data to appear in the TTN display.
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5 Linux System
The LPS8 is based on the OpenWrt Linux system. It is open source, and users are free to configure
and modify the Linux settings.
5.1 SSH Access for Linux console
You can access the Linux console via the SSH protocol. Make sure your PC and the LPS8 are
connected to the same network, then use a SSH tool (such as putty in Windows) to access it.
IP address: IP address of LPS8
Port: 22 or 2222 (SSH port in WAN interface has been change to 2222 since firmware
5.3.xx, for security reason)
User Name: root
Password: dragino (default)
After logging in, you will be in the Linux console and can enter commands as shown below.
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5.2 Edit and Transfer files
The LPS8 supports the SCP protocol and has a built-in SFTP server. There are many ways to edit
and transfer files using these protocols.
In Windows, one of the easiest methods is using the WinSCP utility.
After establishing access via WinSCP to the device, you can use an FTP style window to drag /
drop files to the LPS8, or edit the files directly in the windows.
Screenshot is as below:
5.3 File System
The LPS8 has a 16MB flash and a 64MB RAM. The /var and /tmp directories are in the RAM, so
contents stored in /tmp and /var will be erased after rebooting the device. Other directories are
in the flash and will remain after reboot.
The Linux system uses around 8MB ~10MB flash size which means there is not much room for
user to store data in the LPS8 flash.
You can use an external USB flash memory device to extend the size of flash memory for storage.
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5.4 Package maintenance system
LPS8 uses the OpenWrt OPKG package maintenance system. There are more than 3000+
packages available in our package server for users to install for their applications. For example, if
you want to add the iperf tool, you can install the related packages and configure LPS8 to use
iperf .
Below are some example opkg commands. For more information please refer to the OPKG
package maintain system (https://wiki.openwrt.org/doc/techref/opkg)
In Linux Console run:
root@dragino-169d30:~# opkg update // to get the latest packages list
root@dragino-169d30:~# opkg list //shows the available packages
root@dragino-169d30:~# opkg install iperf // install iperf
The system will automatically install the required packages as shown below.
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6 Upgrade Linux Firmware
We keep improving the LPS8 Linux side firmware for new features and bug fixes.
The latest firmware can be found on LoRa Gateway Firmware,
( http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LG02-OLG02/Firmware )
The Change Log can be found here: Firmware Change Log.