I would unplug the USB and plug it back in. Use the 'dmesg' command to see if it sees the device being unplugged and re-plugged.
Use the 'lsusb' command to see what is connected to your pi. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/103957c7-7064-4ba3-9f72-a7e2447ac2d3n%40googlegroups.com.