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How to Install the USB driver for the BT510, BT520 and BT521

If you are unable to connect your device to Battery Management software, it could be a USB driver issue. Here are a few steps to make sure that it is setup properly.

  • Open the Device Manager on your computer (My Computer > Control Panel > Device Manager)
    • Or type in Device Manager in the Windows Start search bar
  • Look for the drop down titled “Ports (COM & LPT)”, once selected you should see your device assigned to a COM port (COM#).

There might be a yellow triangle with a “!” next to a “USB Serial Port”, this will appear if the USB driver did not install successfully; manually update driver by right clicking on device and selecting “Update Driver Software…”


  •  Right click on the device and select “Properties” to view driver information, select “Driver” tab at the top of the new window; you should be able to view the Driver Provider and Driver Version.
  • FTDI is the driver provider for the optical to USB cable (IR189USB). 
  • If there are blanks or "???" in any of the fields, you would need to uninstall and reinstall the necessary driver (this would also require a computer restart once the driver is installed.mceclip1.png
  • If you are unsure what the recent driver version is you can view FTDI's website for more information, mceclip2.png
  •  On the FTDI Chip website go to the bottom and select the underlined click here section. 
  • Open the downloaded .exe file to install current driver. Once complete, restart the computer.
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