Download blink1-tool from GitHub:

wget https://github.com/todbot/blink1-tool/releases/download/v2.3.0/blink1-tool-v2.3.0-linux-aarch64.zip
unzip blink1-tool-v2.3.0-linux-aarch64.zip

Create a file called 51-blink1.rules and paste the below rules into it:

# Copy this udev with "sudo cp 51-blink1.rules /etc/udev/rules.d/"
# When done, do "sudo udevadm control --reload && sudo udevadm trigger"
# Edit it to suit your type of Linux. It's currently set up for modern Ubuntu
ATTRS{idVendor}=="27b8", ATTRS{idProduct}=="01ed", MODE:="666", GROUP="plugdev"

Then run the below commands:

sudo cp 51-blink1.rules /etc/udev/rules.d/51-blink1.rules
sudo udevadm control --reload
sudo udevadm trigger

You can now run blink1-tool without using sudo:

./blink1-tool --on