How to define and reference an array of CONSTANTS in deployed module

Go back and have a look at the sample: http://www.espruino.com/Writing+Modules

You need to add a constructor function and export the reference to that.

The bind your contants to that function. so if you called it myMod :

var myMod = function (options) {
  this.options = {}    || options;
};


myMod.C = {
  U : "up",
  D : "down",
  L : "left",
  R : "right",
  N : "north",
  E : "east",
  S : "south",
  W : "west",
  T : "top",
  M : "middle",
  B : "bottom"
};

exports = myMod;

my_mod=new myMod();
print my_mod.C.U;