function ePic = activate( ePic, propName )
%ACTIVATE Activate the reception of some sensor values. It can also
%         activate some mechanisms in the interface.
% 
% ePic = activate(ePic,propName)
%
% Results :
%   ePic            :   updated ePicKernel object
%
% Parameters :
%   ePic            :   ePicKernel object
%   propName        :   check updateDef function to get the availible names

ePic = updateDef(ePic,propName, 1);