There is no problem on the Arduino side, which can interface to sensors of all kinds just fine, as well as act as an I2C master or use SPI or traditional serial data communication for sending such results along to another system, e.g. the Pickaze.
Your problem is entirely one of finding out how Pickaxe is configured to receive such data.
So find an Pickaxe forum or document or whatever. Unless there happens to be someone hanging out here with specific experience and knowledge about the Pickaxe.
Whilst waiting, find the place where Pickaxe is the big deal. Google is your friend.
Makes no sense. You have an Arduino of some kind, and a Pickaxe, and you want to transfer data from one to the other.