Manually modify value received from request in HA

[NeoX]

Hi all!

I wonder, is that possible to manually modify value stored in HA?
in my sketch i'm planing to receive pulse value from HA like described in pulse meter example:
https://www.mysensors.org/build/pulse_water

But before i connect my node, is it possible somehow to modify values received via request() in HA?
So i would get any value i set?

Thanks!