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Welcome to the stratux_ahrs wiki!

Here, the correct operation of the app will be explained, as well as details on how to contribute end customize the app for specific uses.

How to Tell Information is Valid

The above image shows what the display looks like when it suspects that data is not valid. This can be caused by a few things:

• There is no AHRS connected (ADS-b off)
• The phone is not on the same network as the AHRS (wrong network)
• The ADSb doesn't have a AHRS module (invalid hardware)
• There is some other error with the data being received (bad data)

If this issue persists and it is believed that the data should be good (working ADS-b, stopped working "out of the blue", etc.) a good first step is to close the app and restart it.

There may be times where only portions of the display are shown to be "invalid". This can signify a failure of one system in particular. For example, if the "GPS GS" and "GPS TRK" tapes are invalid, a GPS issue might be the culprit. In this case, it is recommended to look at the GPS Sat Count badge to see if the system has any satellites. In the above image, the badge is showing "-", which signifies that there are no valid satellites being used.

Understand where the data comes from:

There are 3 primary sources of data that the AHRS displays:

• GPS - Used for GPS Speed, GPS Ground Track, and GPS Speed (if selected)
• IMU (inertial measurement unit) - Used for AHRS attitude information
• Pressure Sensor (Usually attached to the IMU) - Used for Baro Altitude

Simulation at Home

To make the display think there is stuff going on, the configuration file must be changed: configuration.js:

• Set system.simulate to true. Note that this is the last variable in the "simulate" section. If working on a local machine (not the Raspberry pi), set up a local webserver to test the result:

python -m SimpleHTTPServer 8000

Now visit the page in the browser via localhost:8000