CoRE - Get peer assistance here with setting up Pistons

Newbie to Smartthings, but long time Home automation guy.

I am using an enerwave zwn-sc7 with the custom device code from CustomDevice

Unfortunately I can only access 4 of the 7 buttons in pistons using capability type of “button”.

Is it possible to add a new device type?

Is this the right area of code?::

	[ name: "zwn-sc7",							display: "zwn-sc7",							attribute: "button",					multiple: true,			devices: "buttons",			count: "numberOfButtons", data: "buttonNumber", momentary: true],