Are you sure the chip you're using is bootloaded (and with the correct bootloader?)
Uno expects a chip clocked at 16mhz and optiboot bootloader at 115200 baud.
If you've got something else on the chip, it will not upload.
Are you sure the chip you're using is bootloaded (and with the correct bootloader?)
Uno expects a chip clocked at 16mhz and optiboot bootloader at 115200 baud.
If you've got something else on the chip, it will not upload.