Average static pressure.

    Args:
        msg (String): 28 bytes hexadecimal message string

    Returns:
        int: static pressure in hPa

def p45(msg):
    """Average static pressure.

    Args:
        msg (String): 28 bytes hexadecimal message string

    Returns:
        int: static pressure in hPa

    """
    d = hex2bin(data(msg))
    if d[26] == '0':
        return None
    p = bin2int(d[27:38])    # hPa
    return p