Converting hex to decimal

zenofmud
thanks for the help/info but those advice til now is not helping me for a useful result.
I try another solution
node-red rflink
buying/soldering using rfload gives as example with rflink:
20;09;Cresta;ID=3A01;TEMP=00ed;HUM=66;

In the above example, the device has 2 values, TEMP and HUM. The msg.payload will have msg.payload.temp and msg.payload.hum

How should i do that?
Can you help me?
Dick