you can transmit digital data using the combination of MATLAB programming and wireless unit. But i can not understand about calculater.
anyway you can do one thing. by using parallel prot you can transmit data using FSK techhnique. Means develop you application software using MATLAB, then after add parallel port programming using MATLAB. then conncec transmitter unit with parallel port of computer,
Connect receiver circuit and Triggering circuit with parallel port of next computer. After transmitting the data, you will sure enabled the required devices using wireless setup. (I have implemented it already. If you need detail description then come with your quary)