def dict_from_payload()

in transform_binary_payload/src-payload-decoders/python/meteo_helix.py [0:0]

• 42 lines of code
• 5 McCabe index (conditional complexity)

def dict_from_payload(base64_input: str, fport: int = None):
    """ Decodes a base64-encoded binary payload into JSON.
        Parameters
        ----------
        base64_input : str
            Base64-encoded binary payload
        fport: int
            FPort as provided in the metadata. Please note the fport is optional and can have value "None", if not
            provided by the LNS or invoking function.
            If  fport is None and binary decoder can not proceed because of that, it should should raise an exception.
        Returns
        -------
        JSON object with key/value pairs of decoded attributes
    """

    decoded = base64.b64decode(base64_input)

    # Printing the debug output
    if DEBUG_OUTPUT:
        print(f"Input: {decoded.hex().upper()}")

    if len(decoded):
        binary = data_to_bits(decoded)
        # if physical property is 1111... =  Sensor Error
        if "0" not in binary:
            return {"Error": "Sensor Error or N/A"}

        # Message type - 2 bits
        start_bit_offset, msg_type = bit_shift(binary, 0, 2)

        # Battery - 5 bits
        start_bit_offset, batt = bit_shift(binary, start_bit_offset, 5)
        batt = round(batt * 0.05 + 3, 2)

        # Temperature - 11 bits
        start_bit_offset, temp = bit_shift(binary, start_bit_offset, 11)
        temp = round(temp * 0.1 - 100, 2)

        # T_min - 6 bits
        start_bit_offset, t_min = bit_shift(binary, start_bit_offset, 6)
        t_min = round((temp - t_min * 0.1), 2)

        # T_max - 6 bits
        start_bit_offset, t_max = bit_shift(binary, start_bit_offset, 6)
        t_max = round((temp + t_max * 0.1), 2)

        # Humidity - 9 bits
        start_bit_offset, humid = bit_shift(binary, start_bit_offset, 9)
        humid = round(humid * 0.2, 2)

        # Pressure - 14 bits
        start_bit_offset, press = bit_shift(binary, start_bit_offset, 14)
        press = press * 5 + 50000

        # Irradiation - 10 bits
        start_bit_offset, irrad = bit_shift(binary, start_bit_offset, 10)
        irrad = irrad * 2

        # Irr_max - 9 bits
        start_bit_offset, irr_max = bit_shift(binary, start_bit_offset, 9)
        irr_max = irrad + (irr_max * 2)

        # Rain - 8 bits
        start_bit_offset, rain = bit_shift(binary, start_bit_offset, 8)
        rain = round(rain, 2)

        # Min_time_between_rain_gauge_clicks - 8 bits
        start_bit_offset, min_time_between = bit_shift(binary, start_bit_offset, 8)

        result = {
            "Type": msg_type,
            "Battery": batt,
            "Temperature": temp,
            "T_min": t_min,
            "T_max": t_max,
            "Humidity": humid,
            "Pressure": press,
            "Irradiation": irrad,
            "Irr_max": irr_max,
            "Rain": rain,
            "Rain_min_time": min_time_between
        }
        return result