Specifications

Programming the Mio R-4
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Mio Modero R-4
10. Right-click on Empty Device Tree/System and select Refresh System to re-populate the list. 
The Mio R-4 will not appear as a device below the virtual system number (in the Online Tree tab)
until both the system number (default = 1) is entered into the Master Connection section of the
System Settings page and the Mio R-4 is restarted.
The Connection status turns green after a few seconds to indicate an active USB connection to
the PC (Virtual Master).
If the System Connection icon does not turn green, check the USB connection and
communication settings and refresh the system.