Add new string processor command "add()" to add constant (offset) to the value

[amsterjanis]

Added new command to string processor "add()" that adds an offset to the value.
Did not find a way to do this with existing commands.

[maxwroc]

LGTM. I'm curious what is the exact use case for this command?

[amsterjanis]

I was trying to convert signal strength (dBm) into percentage and the commonly used formula is
percentage = (dBm + 100) * 2
Couldn't figure out how to achieve that existing commands.
Another use case would be to adjust a sensor value that you know to be off, for example a device that reports battery percentage 10% lower than it actually is based on previous experience.

[maxwroc]

Ok thanks for the examples - sounds reasonable