Common problems
Troubleshooting
Start with reference elevation and the simple checks before changing calibration or Android settings.
No pressure reading
Confirm that the phone or tablet actually has a barometric pressure sensor. GPS altitude, weather-app pressure and a pressure sensor are different things. Marine Barometer needs the hardware sensor for live Barometer and Altimeter operation.
The Barometer is wrong after moving to another elevation
Check the active Reference Elevation. Normal choices are Location, GPS or Manual. A sea-level Barometer calculation using the wrong elevation can be far from the local weather pressure even when the phone sensor is working perfectly.
The graph shows a sudden pressure change during a drive or walk
That is often elevation rather than weather. For a short local excursion, use Lock Barometer. For longer travel, change to the appropriate reference elevation or pause Graphing when the trace would no longer represent one place.
Graphing works but no dated CSV file appears
That can be normal. Graphing and CSV Logging are separate. Routine Graphing maintains the rolling Barograph without requiring a dated CSV. Start CSV Logging deliberately when you want detailed archival or test data.
CSV logging will not start or files are unavailable
Open MENU → SETUP and choose or reauthorize the Marine Barometer log folder. Android can revoke or lose remembered Storage Access Framework permissions after device or app changes.
Background Graphing stops
Android battery management varies by device. If background collection is being stopped, check that Marine Barometer is allowed to run in the background and is not being aggressively battery-restricted. Marine Barometer's ECO scheme minimizes wake time, but Android still controls whether scheduled work is permitted.
The Tide Clock differs from today's tide table
That is expected over time. The Tide Clock is a traditional fixed-period phase instrument, not a harmonic tide-prediction engine. Reset it from the nearest known HIGH or LOW tide when closer agreement matters.
The Barometer does not agree with a trusted nearby reference
First verify the active reference elevation. If that is correct, use the Calibration Instrument with an independent current QNH/barometer reading. Do not use Marine Barometer's own output as its calibration reference, and do not add a calibration point while the phone is at an incorrectly entered elevation.
Still stuck?
Email virtualcockpitfun@gmail.com. Include the Marine Barometer version, Android device model, Android version and a short description of what you expected and what happened.