Logger Lite will display the message “No Device Connected” or “no sensors detected” when a device such as a Go!Temp or LabQuest cannot be found. Below are troubleshooting steps to solve the most common problems.

If you have multiple computers and interfaces, with some of them working and some not, try methodically switching interfaces, cables, power supplies, and computers to see if the problem is with a piece of the hardware or with the computer. The best test to do is to take one of your completely working stations, and try swapping in a different interface, then a new connector cable, etc. If you can trace the problem to one of these pieces, we can probably repair or replace that part.

  1. What version of Logger Lite are using? To find out, open Logger Lite and choose “About Logger Lite”. The exact version number will in the About screen. If you have any version of Logger Lite older than 1.4, you may need to update in order to get the latest drivers. The free upgrade from previous versions of Logger Lite is available at:
    http://www.vernier.com/tech/llupdates.html.
  2. Check all of your cable connections. It could be that the device really is not connected. Make sure that one end of the cable is completely plugged in to the interface and the other end is all the way into the computer. It is possible that a USB cable is bad. Use a USB cable that you know is good because it works with a different device.
  3. Another program is already connected to the device. If two copies of Logger Pro, Logger Lite, or LabQuest Emulator are running at the same time, only one can talk to a given device. Quit the unneeded applications.
  4. If you are using a LabQuest or LabPro and the unit is not turned on or has low or dead batteries, it may not be seen by Logger Lite. Connect an AC adapter to the interface. If you are using a LabQuest, make sure it is turned on. If you are using a Go! device, see The LED on my Go! device or LabQuest Mini is not green. What does that mean?

Windows-Specific Issues
If you are using LabQuest or LabPro, the most common problem on a Windows computer is that the drivers have not been installed correctly. See: (Windows) How do I reinstall Logger Pro 3?