How To Install
From GeoSharing
This installation manual is divided into two parts. The first part presents preliminary configurations that must be done before starting any development on the Opemoko Neo FreeRunner (GTA02). The second part describes the technical steps to follow in order to install the GeoSharing project on the Neo FreeRunner.
All those steps have been tested on a Neo FreeRunner and on a laptop running Ubuntu 10.10 with access to root privileges.
Contents |
Preliminary configurations
This section consists in three parts. The first thing to do is to configure a connection between the Neo FreeRunner and a computer via a USB cable. Most of the operations that must be executed on the Neo FreeRunner are easily performed on a computer disposing of a keyboard and a larger screen than the GTA02. A SSH connection should thus be established from the computer to the Neo FreeRunner in order to have access to it.
The second part details the installation steps of an operating system (OS) on the Neo FreeRunner. This operation is made possible thanks to the communication channel created before via the USB cable. The operating system called SHR was chosen to be used in the scope of the GeoSharing project.
The third part shows how it is possible to share the internet connection of a computer with the Neo FreeRunner via the USB cable.
USB interface configuration
An important thing to notice is that the USB connectivity is considered as an ethernet connection by both the Neo FreeRunner and the computer. This implies the use of IP addresses to identify both ends of the connection. By default, the Neo FreeRunner has a static IP address: 192.168.0.202 and nothing must be done to change that. The goal is then to configure the computer to have an IP address in the same sub-network than the Neo FreeRunner to be able to communicate with it.
1) The first thing to do on the computer is to create an alias for the IP address of the Neo FreeRunner. Edit the file /etc/hosts by adding the line:
192.168.0.202 openmoko
2) There exists two possible methods to set up an ethernet connection between both devices via the USB cable. On the computer, it is possible to choose:
Via the network manager
The easiest way to set up the connection with the Openmoko is to create a new connection (called Openmoko here) in the wired networks tab of the computer network manager. For this new connection, choose a static (manual) IP address: 192.168.0.200.
Without the network manager
- On the computer, open the file located at the following location: /etc/network/interfaces and add the following lines at the end of the file:
# The Openmoko network interface auto eth1 iface eth1 inet static address 192.168.0.200 netmask 255.255.255.0
- On the computer, restart the network service by running the following command as root:
# /etc/init.d/networking restart
3) If an operational OS is running a SSH daemon on the Neo FreeRunner, it is possible to establish an SSH connection from the computer to the root session of the Neo FreeRunner.
$ ssh root@openmoko root@om-gta02 ~ #
If it is not the case (i.e. there is no SSH d\ae mon or no operating system at all), the Neo FreeRunner can be flashed with, for example, the operating system used in the scope of the GeoSharing project: SHR.
Flashing the SHR operating system on the Neo FreeRunner
The easiest way to flash the Neo FreeRunner is to use neoTool on the computer. It is mandatory to install dfu-utils via the Synaptic Package Manager of the computer before running neoTool. The version of neoTool that have been used to realise this manual is the version 1.3.
Before going any further, the Neo FreeRunner must be connected to the computer with the USB cable, the IP address of each device must have been previously configured and the Neo FreeRunner must be booted on the NOR memory (POWER + AUX buttons).
1) The first step is to copy the bash script that can be found at http://users.on.net/~antisol/neotool into an empty file on the computer. Rename this file neoTool and give it the execution rights.
$ chmod u+x neoTool
2) The second step is to run neoTool on the computer with root privileges.
$ sudo ./neoTool
3) The application is now running and the interface looks like:
4) On the computer, download the latest version of the SHR operating system. The version of SHR used to realise this manual is the version SHR-testing 2.6.29-oe11. Images of the SHR operating system can be found at http://build.shr-project.org/shr-testing/images/om-gta02/. Two files are required:
- lite-om-gta02.jffs2
- uImage-*.bin
5) In neoTool (which is running on the computer), select the second item Flash your Neo and click OK. The interface looks like:
On the next screen, don't change anything and click `OK'.
6) The path to the *.jffs2 and the *.bin files are respectively asked.
7) Click on the OK button of neoTool to launch the flashing process.
8) When the process is done, the Neo FreeRunner restarts automatically and the new operating system is ready to be used.
Internet connectivity
When the operating system is installed and running, the configuration steps required in order to share the internet connectivity of the computer with the Neo FreeRunner via the USB cable are the followings. These steps must be done on the computer connected to the Neo FreeRunner.
1) On the computer, edit the file /etc/sysctl.conf
$ gedit /etc/sysctl.conf
2) Look for the following line in this file:
#net.ipv4.conf.default.forwarding=1
and uncomment it (remove the # character if not already done).
3) The iptables of the computer must be configured such that the computer behaves as a simple router for the Openmoko. The computer must forward packets coming from the Neo FreeRunner to the internet and the other way around. Edit the file /etc/rc.local:
$ gedit /etc/rc.local
and add these lines at the end of the file:
/sbin/iptables -P FORWARD ACCEPT /sbin/iptables --table nat -A POSTROUTING -s 192.168.0.202/32 -o iface -j MASQUERADE
where iface corresponds to the interface of the computer connected to the internet (wlan0, eth0, eth1, ...).
4) The computer have now to be rebooted.
The internet connection of the computer is now shared with the Neo FreeRunner. In order to check if the sharing of the internet connection is well configured, from the Neo FreeRunner, perform a ping to www.google.com and the results should look like this:
root@om-gta02 ~ # ping www.google.com PING www.google.com (66.102.13.103): 56 data bytes 64 bytes from 66.102.13.103: seq=0 ttl=55 time=19.548 ms 64 bytes from 66.102.13.103: seq=1 ttl=55 time=35.519 ms (...)
GeoSharing project installation
Since the GeoSharing project is based on the OLSRd Linux daemon and on tangoGPS, it is mandatory to compile and install those two applications as well as the GeoSharing application.
Before going any further, extra packages such as a C compiler (gcc) and libraries (libglib, libconfig, libgps, etc.) need to be installed on the Neo FreeRunner. In order to install these packages, an internet connection is required. The following commands must then be executed on the Neo FreeRunner.
root@om-gta02 ~ # opkg update
root@om-gta02 ~ # opkg upgrade
root@om-gta02 ~ # opkg install make gcc gcc-symlinks libc6 libc6-dev binutils binutils-symlinks coreutils kernel-module-tun kernel-module-tunnel4 mdbus libglib-2.0-dev
libdbus-glib-1-dev gconf orbit2 libidl-2-0 policykit eggdbus libexif12 libgps gpsd-dev gtk+ gconf libxml2-dev libsoup-2.4-dev bluez4-dev curl curl-dev
libexif-dev libconfig-dev
Now that the needed packages are installed, OLSRd, tangoGPS and the GeoSharing application can be compiled and installed on the Neo FreeRunner.
OLSRd Linux daemon
The compilation process of OLSRd requires bison and flex packages to compile the syntactical analyser used inside OLSRd. Since the version of SHR proposed in this manual does not provide those packages (bison and flex) in the package repository, the compilation of the syntactical analyser have to be done on another version of the OS.
The entire compilation and installation process of OLSRd on the Neo FreeRunner is detailed in the following steps. Some steps are performed on a Neo FreeRunner running the SHR-unstable version of the operating system while some other steps are performed on the SHR-testing version. The SHR-unstable version provides much more packages in the package repository. Bison and flex are fortunately part of the list. On the Neo FreeRunner running the SHR-unstable version, all the packages previously listed have been installed. In addition to them, bison and flex have been installed as well.
A computer is used to easily manage file transfers between the Neo FreeRunner devices.
1) On the computer, download the last stable release of OLSRd (*.tar.gz file) from http://www.olsrd.org. The version of OLSRd used to realise this manual is the version 0.6.
2) Extract the archive content on the computer filesystem and open a terminal pointing to the folder that has just been extracted.
3) At this time, only the Neo FreeRunner running SHR-unstable must be connected to the computer. From the computer, copy the entire olsrd folder to the Neo FreeRunner running SHR-unstable.
$ scp -r olsrd-0.6.0 root@openmoko:/home/root/
4) On the Neo FreeRunner running SHR-unstable, open a terminal, go in the olsrd folder and compile the project. This process may take a while.
root@om-gta02 ~ # cd olsrd-0.6.0 root@om-gta02 ~ # make
5) From the computer, it is now necessary to collect the generated files from the SHR-unstable device.
$ scp -r root@openmoko:/home/root/olsrd-0.6.0 /home/user/
6) The Neo FreeRunner running SHR-unstable must be disconnected from the computer and may be shut down. This device is never used anymore.
7) The Neo FreeRunner running SHR-testing has to be connected to the computer.
8) From the computer, copy the entire olsrd folder to the Neo FreeRunner running SHR-testing.
$ scp -r olsrd-0.6.0 root@openmoko:/home/root/
9) On the Neo FreeRunner running SHR-testing, open a terminal, go in the olsrd folder and install the compiled OLSRd d\ae mon.
root@om-gta02 ~ # cd olsrd-0.6.0 root@om-gta02 ~ # make install
The OLSRd daemon is now installed on the Neo FreeRunner.
In the scope of the GeoSharing project, the BMF plugin (always provided in the OLSRd archive file) is required. Its compilation and its installation are quite easier than for the OLSRd daemon. On the Neo FreeRunner, open a terminal, go in the folder located at /home/root/olsrd-0.6.0/lib/bmf, compile and install the plugin.
root@om-gta02 ~ # cd /home/root/olsrd-0.6.0/lib/bmf root@om-gta02 ~ # make root@om-gta02 ~ # make install
The final configuration required for the daemon to be fully effective is a configuration file. This file is located at /etc/olsrd.conf. There are two things to adapt for the GeoSharing project:
1) At the end of the file, the OLSRd interface must be specified. Since OLSRd must be running on the Wi-Fi interface of the Neo FreeRunner, the OLSRd interface should be eth0. On the Neo FreeRunner, the VI editor can be used to edit this file accordingly.
Interface "eth0"
{
Mode "mesh"
}
2) In the plugin section of the file, an entry must be added to load the BMF plugin when the d\ae mon is launched. On the Neo FreeRunner, the VI editor can be used to edit this file accordingly.
LoadPlugin "olsrd_bmf.so.1.7.0"
{
# no option
}
The OLSRd Linux daemon is now ready to serve the GeoSharing objectives in terms of network topology management.
TangoGPS application
TangoGPS is provided in some editions of the SHR-testing version. But a modified version of tangoGPS has been developed in the scope of the GeoSharing project. This new version adds a plugins interface allowing plugins to easily interact with tangoGPS. The compilation and the installation of the modified version of tangoGPS is described in the following steps.
1) Before going any further, make sure that the Neo FreeRunner is free of any version of tangoGPS. On the Neo FreeRunner, open a terminal and execute the following command:
root@om-gta02 ~ # opkg remove tangogps
2) On the computer, download the latest version of tangoGPS-modified from http://download.geosharing-project.org.
3) Extract the archive content on the computer filesystem and open a terminal pointing to the folder that has just been extracted.
4) From the computer, copy the entire tangogps folder to the Neo FreeRunner.
$ scp -r tangogps root@openmoko:/home/root/
5) On the Neo FreeRunner, open a terminal, go in the tangogps folder, compile and install the project. Pay attention to the third, fourth and fifth commands. They are really important to avoid compilation issues. This process may take a while.
root@om-gta02 ~ # cd tangogps root@om-gta02 ~ # sh configure root@om-gta02 ~ # CFLAGS="-march=armv4t" root@om-gta02 ~ # PACKAGE_CFLAGS="-lconfig" root@om-gta02 ~ # PACKAGE_LIBS="-lconfig" root@om-gta02 ~ # make root@om-gta02 ~ # make install
TangoGPS is now ready to serve the GeoSharing objectives in terms of graphical display.
WEP security
On the Neo FreeRunner, the wireless interface is denoted as eth0. The following lines need to be added in the configuration file of the device interfaces in order to set the wireless network in ad hoc mode with the WEP security enabled. On the Neo FreeRunner, the VI editor can be used to edit the file located at /etc/network/interfaces accordingly.
auto eth0 iface eth0 inet static address 10.0.0.1 netmask 255.0.0.0 network 10.0.0.0 wireless-mode ad-hoc wireless-essid GeoSharing wireless-key F4C3DEB3BE
Once the configuration file has been modified, the network interfaces have to be restarted. The simplest solutions are to restart the device or execute the following command in a terminal of the device:
root@om-gta02 ~ # /etc/init.d/networking restart
GeoSharing
Now that OLSRd Linux daemon and tangoGPS are correctly installed, the main module of the GoeSharing project must be installed as well. This installation is detailed in the following steps.
1) On the computer, download the latest version of the GeoSharing application from http://download.geosharing-project.org.
2) Extract the archive content on the computer filesystem and open a terminal pointing to the folder that has just been extracted.
3) From the computer, copy the entire geo_sharing folder to the Neo FreeRunner.
$ scp -r geo_sharing root@openmoko:/home/root/
4) On the computer, download the latest version of the run_geosharing.sh script from http://download.geosharing-project.org.
5) From the computer, copy the run_geosharing.sh script to the Neo FreeRunner.
$ scp run_geosharing.sh root@openmoko:/home/root/
This script (shown in Listing~\ref{list:run}) is the entry point of the GeoSharing application. It first configures the wireless network interface. Then, it launches the OLSRd d\ae mon. Finally, it compiles the GeoSharing application if it is not already done and launches it.
#!/bin/sh cd /home/root/ CURRENT_STATE=`mdbus -s org.freesmartphone.ousaged /org/freesmartphone/Usage org.freesmartphone.Usage.GetResourceState WiFi` if [ $CURRENT_STATE = "False" ]; then echo WiFi is currently down ... Setting it up now ... mdbus -s org.freesmartphone.ousaged /org/freesmartphone/Usage org.freesmartphone.Usage.SetResourcePolicy WiFi enabled mdbus -s org.freesmartphone.ousaged /org/freesmartphone/Usage org.freesmartphone.Usage.RequestResource WiFi ifconfig eth0 up /etc/init.d/networking restart else echo WiFi is already up ! fi echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts mkdir -p /dev/net mknod /dev/net/tun c 10 200 chmod 0700 /dev/net/tun olsrd cd /home/root/geo_sharing/ make clear ./geo_sharing -m dbus
Two methods for GPS data retrieval have been implemented. By default, the D-Bus method is used to retrieve GPS data. To use the TCP method instead, on the Neo FreeRunner, using VI, edit the script run_geosharing.sh and replace the last line:
./geo_sharing -m dbus
by
./geo_sharing -m tcp
This script eases the launch of the GeoSharing application. Besides, it can be executed for two different purposes.
- The GeoSharing application can be launched by tangoGPS when an end-user clicks on the GeoSharing entry of the plugins menu. The interactions with the end-user takes place through the graphical interface provided by tangoGPS. In order to provide to tangoGPS the path to the run_geosharing.sh script, the tangoGPS configuration file (located at /etc/tangogps_plugins.conf) has to be filled accordingly.
# TangoGPS Plugins Interface
nbr_plugins = 1;
Plugin1 = {
name = "GeoSharing";
path = "sh /home/root/run_geosharing.sh";
options = "";
running = "/tmp/geosharing.run";
};
- The GeoSharing application can also be launched alone in a terminal. The interactions with the end-user takes place through messages displayed in the terminal.
Information about using the application can be found here.
