to be complete, for others maybe who are looking for such a solution, here is the flow...
[{"id":"6ad195b70dd7b0de","type":"tab","label":"Flow 7","disabled":false,"info":"","env":[]},{"id":"03e628dbdbbddd43","type":"udp in","z":"6ad195b70dd7b0de","name":"WeatherDuino UDP","iface":"","port":"9889","ipv":"udp4","multicast":"false","group":"","datatype":"buffer","x":150,"y":160,"wires":[["f5f4b0ac9de7a12b"]]},{"id":"2b858bac73dca7f6","type":"comment","z":"6ad195b70dd7b0de","name":"Explanation of the UDP packet","info":"Decoding a WeatherDuino UDP packet\n\n======================================================================================\nSent out bij the 8266 controller is a 20 byte packet.\nfor example this packet with the Temperature and Humidity values:\n\noutput is only one line of course, values below are formatted and DEC\nvalues are added\n\n Contents HEX: 82,0, A3,0, D6,0,0,0, D6,1,0,0, 4C,0,0,0, B0,3,0,0\n Contents DEC: 130,0,163,0, 214,0,0,0, 214,1,0,0, 76,0,0,0, 176,3,0,0\n\nShould result in (this example):\n\nPacket_ID 2 bytes/16bits = 130 (id 130 = temp and humidity packet)\nTX_Relay 2 bytes/16bits = A3 (no hex to dec conversion needed)\nTemp in 4 bytes/32bits = 214 (/10 = 21,4 C)\nHum in 4 bytes/32bits = 470 (/10 = 47,0 %RH)\nTemp out 4 bytes/32bits = 76 (/10 = 7,6 C)\nHum out 4 bytes/32bits = 944 (/10 = 94,4 %RH)\n \n\n1st 4 bytes >> must be divided into TWO 2 byte values\n\n--- -------- -------- \nDEC 130, 0\nHEX 82, 0\nBIN 10000010,00000000 16bit SWAP is needed\n\n--- -------- --------\nDEC 163, 0\nHEX A3, 0 \nBIN 10100011,00000000 16bit SWAP is needed\n\n\n2nd 4 bytes / 32bits \n--- -------- -------- -------- --------\nDEC 214, 0, 0, 0\nHEX D6, 0, 0, 0 \nBIN 11010110,00000000,00000000,00000000 32 bit swap needed\n\n\n3rd 4 bytes \n--- -------- -------- -------- --------\nDEC 214, 1, 0, 0\nHEX D6, 1, 0, 0 \nBIN 11010110,00000001,00000000,00000000 32 bit swap needed\n\n4th 4 bytes\n--- -------- -------- -------- --------\nDEC 214, 0, 0, 0\nHEX D6, 0, 0, 0 \nBIN 11010110,00000000,00000000,00000000 32 bits swap needed\n\n5th 4 bytes\n--- -------- -------- -------- --------\nDEC 214, 0, 0, 0\nHEX D6, 0, 0, 0 \nBIN 11010110,00000000,00000000,00000000 32 bit swap needed\n\n\n","x":180,"y":120,"wires":[]},{"id":"05651916ebb427fb","type":"switch","z":"6ad195b70dd7b0de","name":"","property":"payload.Packet_ID","propertyType":"msg","rules":[{"t":"eq","v":"128","vt":"num"},{"t":"eq","v":"130","vt":"num"},{"t":"eq","v":"132","vt":"num"},{"t":"eq","v":"133","vt":"num"}],"checkall":"true","repair":false,"outputs":4,"x":150,"y":380,"wires":[["2b7f1cf57a438dd3"],["4ffc1c3f537ce39f"],["0582d9c7be326a6a"],["f4963b9f79054891"]]},{"id":"ec74a332f695d16b","type":"debug","z":"6ad195b70dd7b0de","name":"Packet_ID == 128","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":650,"y":320,"wires":[]},{"id":"197e2c4320ff4bba","type":"debug","z":"6ad195b70dd7b0de","name":"Packet_ID == 130","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":650,"y":360,"wires":[]},{"id":"d87a5eb753d49f88","type":"debug","z":"6ad195b70dd7b0de","name":"Packet_ID == 132","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":650,"y":400,"wires":[]},{"id":"f5f4b0ac9de7a12b","type":"buffer-parser","z":"6ad195b70dd7b0de","name":"buffer parser","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"int16le","name":"Packet_ID","offset":0,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"int32le","name":"Value_1","offset":4,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"int32le","name":"Value_2","offset":8,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"int32le","name":"Value_3","offset":12,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"int32le","name":"Value_4","offset":16,"length":1,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"swap16","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"return","multipleResult":false,"fanOutMultipleResult":true,"setTopic":true,"outputs":1,"x":170,"y":240,"wires":[["05651916ebb427fb"]]},{"id":"8459954a6025a342","type":"inject","z":"6ad195b70dd7b0de","name":"Test UDP packet","props":[{"p":"payload"}],"repeat":"","crontab":"","once":true,"onceDelay":0.1,"topic":"","payload":"[132,0,163,0,214,0,0,0,214,1,0,0,76,0,0,0,176,3,0,0]","payloadType":"bin","x":410,"y":160,"wires":[["f5f4b0ac9de7a12b"]]},{"id":"0582d9c7be326a6a","type":"change","z":"6ad195b70dd7b0de","name":"Process 132 - Wind","rules":[{"t":"move","p":"payload.Value_1","pt":"msg","to":"payload.wind_gust","tot":"msg"},{"t":"set","p":"payload.wind_gust","pt":"msg","to":"payload.wind_gust / 1000","tot":"jsonata"},{"t":"move","p":"payload.Value_2","pt":"msg","to":"payload.wind_speed","tot":"msg"},{"t":"set","p":"payload.wind_speed","pt":"msg","to":"payload.wind_speed /1000","tot":"jsonata"},{"t":"move","p":"payload.Value_3","pt":"msg","to":"payload.wind_dir","tot":"msg"},{"t":"set","p":"payload.wind_dir","pt":"msg","to":"$abs(payload.wind_dir /10)","tot":"jsonata"},{"t":"delete","p":"payload.Value_4","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":350,"y":400,"wires":[["d87a5eb753d49f88"]]},{"id":"ae89d5731ff34f6c","type":"debug","z":"6ad195b70dd7b0de","name":"Packet_ID == 133","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":650,"y":440,"wires":[]},{"id":"2b7f1cf57a438dd3","type":"change","z":"6ad195b70dd7b0de","name":"Process 128 - Pressure","rules":[{"t":"move","p":"payload.Value_1","pt":"msg","to":"payload.barometer","tot":"msg"},{"t":"set","p":"payload.barometer","pt":"msg","to":"$abs(payload.barometer / 1000)","tot":"jsonata"},{"t":"delete","p":"payload.Value_2","pt":"msg"},{"t":"delete","p":"payload.Value_3","pt":"msg"},{"t":"delete","p":"payload.Value_4","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":370,"y":320,"wires":[["ec74a332f695d16b"]]},{"id":"4ffc1c3f537ce39f","type":"change","z":"6ad195b70dd7b0de","name":"Process 130 - Temp / Hum","rules":[{"t":"move","p":"payload.Value_1","pt":"msg","to":"payload.temp_inside","tot":"msg"},{"t":"set","p":"payload.temp_inside","pt":"msg","to":"payload.temp_inside / 10","tot":"jsonata"},{"t":"move","p":"payload.Value_2","pt":"msg","to":"payload.humidity_inside","tot":"msg"},{"t":"set","p":"payload.humidity_inside","pt":"msg","to":"payload.humidity_inside / 10","tot":"jsonata"},{"t":"move","p":"payload.Value_3","pt":"msg","to":"payload.temp_outside","tot":"msg"},{"t":"set","p":"payload.temp_outside","pt":"msg","to":"payload.temp_outside /10","tot":"jsonata"},{"t":"move","p":"payload.Value_4","pt":"msg","to":"payload.humidity_outside","tot":"msg"},{"t":"set","p":"payload.humidity_outside","pt":"msg","to":"payload.humidity_outside /10","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":380,"y":360,"wires":[["197e2c4320ff4bba"]]},{"id":"f4963b9f79054891","type":"change","z":"6ad195b70dd7b0de","name":"Process 133 - Rain","rules":[{"t":"move","p":"payload.Value_1","pt":"msg","to":"payload.rain_conversion_factor","tot":"msg"},{"t":"move","p":"payload.Value_2","pt":"msg","to":"payload.rain_rate","tot":"msg"},{"t":"set","p":"payload.rain_rate","pt":"msg","to":"(payload.rain_rate * payload.rain_conversion_factor) / 10","tot":"jsonata"},{"t":"move","p":"payload.Value_3","pt":"msg","to":"payload.rain_today","tot":"msg"},{"t":"set","p":"payload.rain_today","pt":"msg","to":"(payload.rain_today * payload.rain_conversion_factor) / 1000","tot":"jsonata"},{"t":"delete","p":"payload.Value_4","pt":"msg"},{"t":"delete","p":"payload.rain_conversion_factor","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":350,"y":440,"wires":[["ae89d5731ff34f6c"]]}]