Howto:Build and run FlightGear on Raspberry Pi 4
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==Performance settings ==
Expanding the flight simulator system beyond the primary Raspberry Pi4, that is running FlightGear, is one way to increase the computing power of such a small computer. Avare is a free aviation app, with no ads, that works well with FlightGear. It is an app that is used by many pilots. It will provide a moving map of the FlightGear aircraft, using all FAA charts and a lot more. These charts are for the USA, however some of these FAA Charts cover Puerto Rico, plus parts of Canada, Mexico and the Caribbean. For other parts of the world, there are other apps that might work. Avare can be downloaded from Google Play Store. A tablet is a good choice for running this app.
FlightGear and Avare are easy to bind together. Along with the main Avare app, the I/O app will also need to be installed on the tablet. This app is ‘Avare External I/O Plugin’. The scheme is that the Raspberry Pi4 and FlightGear will become the GPS signal used by the Avare app, this position is transferred via WiFi. So, the tablets internal GPS needs to be OFF. Avare will always prompt you to turn ON the internal GPS, so when asked to ‘Turn On GPS’, choose ‘No’. In ‘Preferances’ the GPS position source can and should be set to ‘Avare IO Module Only’, however the prompt to turn ON the internal GPS will still pop up when starting the app.
The below command tells FlightGear what to connect to and it's protocol. This can be placed in the GFly type programs or if in Terminal, place the command after fgfs. The address, 192.168.??.?, needs to be the address of the tablet running Avare. Some home networks will randomly choose an address, hence this could change. It will be displayed in the IO app. The number 49002 needs to be the same number that is in the Avare IO app. Use the Xplane option.
After FlightGear has started with the above command, open the Avare External I/O Plugin app. Choose the Xplane option and then tap on ‘Listen’. There should be lines of communication being displayed after ‘Listen’ is enabled. Leave this running and now open the main Avare app. Do not choose to use the internal GPS. Now your FlightGear aircraft placement should be displayed on the FAA map of choice.
[[File:Avare.jpg|thumb|Avare connected to the Raspberry Pi4 and FlightGear. Avare is a moving aviation chart app.]]
The video core GPU temperature can be read with the use of the terminal and the below command:
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