The Weather app is supposed to decode AM modulated common weather stations signals

You can check the currently supported protocols here: baseband/fprotos

• Frequency selector: use rotary encoder or click on it to pop frequency key pad.
• Temperature unit selector: use the rotary encoder to switch from Celsius to Fahrenheit.
• AMP: 0 OFF, 1 ON (beware of strong signals).
• LNA: use rotary encoder to change Low Noise Amplification.
• VGA: use rotary encoder to change Variable Gain Amplification.
• Volume: If beep on packet is enabled in main page settings, then it's the volume at which they will be played.
• Clear: click to clear the displayed list.
• Log: hit the checkbox to save the results in a log file.

Ideal values are around: AMP 0, LNA 32, VGA 20. If still nothing, play with these values, try to reduce or increment.

• 433.92 MHz (EU)
• 315 MHz (US, Japan)
• 868 MHz (EU + others)
• 915 MHz (US, Japan)