I recently purchased a Celestron CGEM II mount. The mount came with a Nexstar+ hand control with a USB port at the bottom. SkySafari 6 and 7 Pro are both able to connect with SkyFi but SkyFi is unable to communicate with the telescope. I am able to update the hand control firmware (which is the latest version) and connect and control the telescope with TheSkyX with a USB cable connected to the hand control. I also have an older Nexstar+ hand control with a RJ11 serial port at the bottom. With this hand control connected to the telescope I am able to connect and control the telescope with SkySafari 6 and 7 Pro.
Suggestions for getting SkySafari to work with the new Nexstar+ USB hand control?