# Tone Board MCU upgrade (online script) for MacOS and Linux /bin/bash -c "$(curl -fsSL https://dl.khadas.com/products/tone2/firmware/tone2_pro/mcu/upgrade_mcu.sh)" or wget https://dl.khadas.com/products/tone2/firmware/tone2_pro/mcu/upgrade_mcu.sh chmod 0777 upgrade_mcu.sh ./upgrade_mcu.sh