If there are problems, please check
- Is the correct board selected in the Arduino software?
- Is the correct serial port selected in the Arduino software (not applicable for Micronucleus bootloader)?
On Linux system: Does the Arduino IDE has the necessary permissions to access serial ports and USB ports?
- Activate in the Preferences the verbose output:
Show verbose output during: [x] compilation [x] upload
- Is the board detected, check Windows Device Manager or under Linux run
dmesg | grep usb?
- If the board is not detected, try to
- Troubleshooting Guide from Arduino
Micronucleus Driver Installation
Download and extract/unzip: Micronucleus Driver (ATtiny)
The Micronucleus bootloader is started, if the board is new and no user program is flashed or after the reset button is pressed.
On Nanite841 boards the on-board LED is blinking, when the bootloader is running.
On installation problems or when the USB device is not recognized try a short USB cable (<30cm).