On the SPD-SX PRO, if you can't reconnect when clicking "Load data and start app!" on the SPD-SX PRO APP after your computer wakes from sleep, follow the steps below.
Quit the SPD-SX PRO APP.
Turn the power of the SPD-SX PRO off and then on again.
Launch SPD-SX PRO APP and click “Load data and start app!” to connect.