If you could you send me a calibre companion (CC) debug log then I can look at what CC thinks is happening. You can send a debug log by first attempting to connect (and presumably failing), then going to CC's settings, scrolling to the botton, and choosing "Send a debug log to MultiPie". Please remove the multipie.co.uk email address, which is for my son. There is no reason to disturb him, as I am working on the problem.