stratux

AHRS from FIX Gateway

This is a small hack to get AHRS data from Makerplane FIX Gateway into stratux. I wrote this because I already had reliable and accurate AHRS data in FIX Gateway and wanted to pass it along to stratux so it could also be used in an EFB.

Installing

These instructions are written for Ubuntu and were only tested on 23.10

Install dependencies

sudo apt install -y librtlsdr-dev libusb-1.0-0-dev pkg-config debhelper libjpeg-dev i2c-tools python3-smbus python3-pip python3-dev python3-pil python3-daemon screen autoconf libfftw3-bin libfftw3-dev libtool build-essential mercurial libncurses-dev golang ifupdown net-tools bridge-utils libconfig9 dnsmasq-base git cmake libusb-1.0-0-dev build-essential autoconf libtool i2c-tools libfftw3-dev libncurses-dev python3-serial jq ifplugd iptables

Clone stratux repo

mkdir -p ~/.makerplane/stratux
cd ~/.makerplane/stratux
git clone --recursive https://github.com/b3nn0/stratux.git

Replace sensors.go

cp sensors.go stratux/main/

Modify network template

sed -i 's/# allow-hotplug eth0 # configured by ifplugd/# Bridge for local ethernet and waydroid/g' stratux/image/interfaces.template 
sed -i 's/iface eth0 inet dhcp/iface eth0 inet manual\n\nauto br0\niface br0 inet static\n  address 192.168.2.1\n  broadcast 192.168.2.255\n  netmask 255.255.255.0\n  bridge_ports eth0\n  bridge_stp off \n  bridge_waitport 0\n  bridge_fd 0\n\n# iLevil IP\n\n# CAN Networks/g' stratux/image/interfaces.template
sed -i 's/allow-hotplug wlan0/auto wlan0/' stratux/image/interfaces.template

If using the iFly plugin in FIX Gateway

If you are using the iFly plugin in FIX Gateway to pickup waypoints from the flight plan you need some additional configuration for the network template.
The issue is iFly only sends to the IP address 192.168.1.1 so we need that address setup for the FIX gateway to get the data.

sed -i 's/# iLevil IP/# iLevil IP\nauto br0:0\niface br0:0 inet static\n  address 192.168.1.1\n  netmask 255.255.255.0/g' stratux/image/interfaces.template

If using CAN add that to the network template too:

sed -i 's/# CAN Networks/# CAN Networks\n\nauto can11\n  iface can11 inet manual\n  pre-up \/sbin\/ip link set can11 type can bitrate 500000 restart-ms 500\n  up \/sbin\/ifconfig can11 up\n  down \/sbin\/ifconfig can11 down\n/g' stratux/image/interfaces.template
sed -i 's/# CAN Networks/# CAN Networks\n\nauto can10\n  iface can10 inet manual\n  pre-up \/sbin\/ip link set can10 type can bitrate 250000 restart-ms 500\n  up \/sbin\/ifconfig can10 up\n  down \/sbin\/ifconfig can10 down\n/g' stratux/image/interfaces.template

Create some directories and links so editing network settings in stratux GUI works

sudo mkdir -p /overlay/robase
sudo ln -s /etc /overlay/robase/etc

Build and install

Build:

cd stratux
sed -i 's/#cgo CFLAGS: -L/#cgo CFLAGS: -I/' godump978/godump978_exports.go
make

Install:

sudo make install

Disable Fan control

I'm not using the fan control from stratux so I disabled that

sudo systemctl stop fancontrol.service
sudo systemctl disable fancontrol.service

Disable other services that should not run automatically

sudo systemctl disable dnsmasq
sudo systemctl disable systemd-resolved.service
sudo systemctl disable wpa_supplicant

Create dnsmasq config for local ethernet

You will likely want to customize this.
I set a static IP address for each waydroid install on the network and for other FIX Gateway servers.

sudo mkdir /etc/dnsmasq.d
echo 'bind-interfaces
except-interface=lxcbr0
interface=br0
dhcp-option=br0,3,192.168.2.1
dhcp-option=br0,6,192.168.2.1
dhcp-range=interface:br0,192.168.2.128,192.168.2.254,24h
dhcp-host=00:16:3e:f9:d3:04,hawk1_android,192.168.2.20,30d
'| sudo tee -a /etc/dnsmasq.d/stratux-dnsmasq-eth0.conf >/dev/null

If using waydroid

Setup waydroid to use the br0 network.

sudo sed -i 's/waydroid0/br0/g' /var/lib/waydroid/lxc/waydroid/config

Reboot

Configure Stratux

After rebooting open up the browser and navigate to http://127.0.0.1

Setup Wifi

Click the settings tab on the left side.
In the WiFi Settings box on the right select the mode AP + Client

Select your wifi country
Enable Network Security and set a password
Enable the option Internet passthrough
Click Add WiFi Client Network
I added my phone's mobile hotspot and my home wifi, if you FBO has wifi might want to add that too!
Click Submit WiFi settings

Enable/disable hardware

On the hardware sections on the settings page enable/disable the hardware you are using

Remove network manager

sudo apt remove network-manager -y
sudo apt autoremove -y

Now reboot

Potential issues

I hadd issues with wlan0 starting on its own. Changing allow-hotplug to auto seems to help, however I also suspect that a heat issue might be part of the problem. I think the fan on the stock PI cooler turns on at too high of a tempature. My x729 UPS with fan seems to compensate well for this.