Hello everyone,
Under the “Altitude” heading, there is the option to measure altitude using a barometric sensor rather than GPS. Unfortunately, I can’t find any reference explaining how the integration works. Does this option apply exclusively to sensors built into the device, or can you, for example, pair an external barometric sensor via Bluetooth?
Moin,
my phone has a built-in air pressure sensor and I can use it to display the barometric altitude according to the entered QNH. I think it therefore relies solely on internal sensors. But Hermann will be able to say more about that.
In any case, a great feature: with the standard altimeter setting of 1013 as a flight level. You can’t get more precise than that.
Yep, as Gerhard writes: the option refers to internal air pressure sensors.
@Maurer Do you have an external barometric sensor? I’d be happy to take a look to see if support for that is possible.
Happy flying
Hermann
Hello Hermann,
I don’t have an external barometric sensor, but I would have bought one if there were already working and tested integrations.
I also discovered, however, that sensors in the form I need simply don’t exist and are only available as part of weather stations or other devices. Whether that would work with the integration into VFRnav is highly doubtful.
Therefore, the matter is probably settled, or I’ll have to keep an eye out for this feature when buying my next tablet.
Thanks for your quick responses so far.
Regards,
Stefan
Just a quick addendum… I tested the feature on my iPhone 16 and it works flawlessly there.
Unfortunately, I use an Android tablet without a barometric sensor for navigation.
…what about the data from a BMP280 (or other sensors …)? Specifically, I’m referring to a sensor installed in a Stratux that’s connected to VFRnav via Wi-Fi. Does anything need to be tinkered with on the Stratux for the output?
simply fly, Karsten
Hi,
We have connected a FLARM as a source for position and traffic. It has a built-in pressure sensor and should provide the barometric altitude as well. Would it be possible, instead of an (non-existent) internal sensor, to use the pressure data from the external device?
Regards,
Philip
Hi Philip,
have you already paired the Flarm with VFRnav?
If you like, please log the data stream on your next flight.
To do this, enable in the VFRnav settings under “External Data Source”, top right in the menu, the option “Raw Data Logging”.
After the flight disable this option. In the same menu a new entry with a list of the recordings will appear. Share this entry with info@flugbetrieb.com
This will allow us to see exactly which data the Flarm is sending.
Happy flying
Hermann
Hello Philip,
I’ve received the recording of the data stream 
I’ll have a look at it in the next few days.
Aviator’s regards (Fliegergruß)
Hermann
Hello Philip, hello Karsten,
VFRnav, as of version 4.24, can now also process air pressure data from an external source in addition to any available internal air pressure sensor. This applies, for example, to both Stratux and FLARM.
Data processing is currently only performed via the NMEA/FLARM protocol. Therefore, Stratux must be connected via TCP (or Bluetooth) instead of GDL90.
Please test it when you have a chance.
Pilot’s regards
Hermann
…Simply awesome!
Hello Hermann,
As soon as I’m back home, I’ll test that right away on my Stratux test environments.
Pilot greetings,
Karsten
Hello Hermann,
The external barometric sensor is now working for us. SteFly Nav 70 serially paired with Flarm.
Many thanks!