I think I have found solution to the problem described above in case of arduino uno with CH340 USB-to-serial chip in Winodws 7 32 bit. Just update the COM driver with drivers for CH340 USB-to-serial chip which can be downloaded from http://javacolors.blogspot.com/2014/08/dccduino-usb-drivers-ch340-ch341-chipset.html. Although the site describes a solution for Macbook, it contains also drivers for windows. This solution worked for me. (Exchange of usb CABLE and Arduino driver reinstalation did not work for me).with regardsBartekThank u , Thank u so much ,the driver worked out for me.it works but it shows up as USB-SERIAL CH340.but it works !!thank u
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16