My first problem with this brand new board:
avrdude: usbdev_open(): cannot open device: Permission denied avrdude: jtag3_open_common(): Did not find any device matching VID 0x03eb and PID list: 0x2145 Errore durante il caricamento dello sketch.
Also this after several unuseful attempts:
avrdude: usbdev_open(): WARNING: failed to set configuration 1: Device or resource busy avrdude: WARNING: invalid value for unused bits in fuse "fuse5", should be set to 1 according to datasheet This behaviour is deprecated and will result in an error in future version You probably want to use 0xcd instead of 0xc9 (double check with your datasheet first).
Finally, even in the presence of an error:
avrdude: usbdev_open(): WARNING: failed to set configuration 1: Device or resource busy,
in my case, it is possible that it will be able to load the sketch but without turning on any led on the board, except for the On of the power supply.
Same thing by pressing the reset button: no light flashes, neither Tx nor Rx.
Also I got sick of this, I sent my board back and the shop refunded me.
But if the reliability problems are solved, I'm sure to buy it again!