I have multiple Unos and Nano and recently due to some bad configuration the USBs are not getting recognised on my Mac Air Laptop. These were working models for almost 1-2 years. I used it to control motors and something must have happened and it stopped.
But strangely the small boot up LEDs on the Nano/Uno light up when connected so it seems that the connection from the laptop USB to the device is good - but the driver ports are not showing up on the Arduino IDE. How do I go about resolving that it is not just a software issue and is a hardware issue ?
I reinstalled the CH340G driver.img and yet the device when plugged in - does not show the USB port on the IDE ? Any thoughts or ideas on how to resolve this.
The Uno/Nano are Chinese Clones and have CH340 chipset on them. Is there some firmware that may have gone wrong and can be reset ? or new boot loader that can be burnt to bring them back to life.
I want to be able to see the Tools-> Port -> /dev/cu.usbserial1410 and also be able to see /dev/cu.usbserial on the command xterm prompt .