i am completely new to node red and i don't find a perfect way to cut my strings.
I finally managed to get my data per MQTT to node red but know i don't know how to go further.
The string i get for example is this:
So what i need are the digits behind 67 :"EC00"
After that i have to swap them to this: 00EC
And then i need to convert that hex value to an signed integer value...
Thanks in advance