def get_meta_data():
    """
        Get the readings meta-data.
        """
    return {'air_temperature': {'type': 'gauge', 'unit': 'C', 'precision': 
        2, 'range_low': 0, 'range_high': 100, 'sensor': 'flower_power'},
        'soil_temperature': {'type': 'gauge', 'unit': 'C', 'precision': 2,
        'range_low': 0, 'range_high': 100, 'sensor': 'flower_power'}}
