Access denied on Linux

Grant your desktop user access to the badge’s HID node, then unplug and reconnect the badge.

sudo groupadd -f plugdev
sudo usermod -aG plugdev "$USER"
sudo tee /etc/udev/rules.d/70-led-badge.rules >/dev/null <<'EOF'
KERNEL=="hidraw*", ATTRS{idVendor}=="0416", ATTRS{idProduct}=="5020", MODE="0660", GROUP="plugdev", TAG+="uaccess"
EOF
sudo udevadm control --reload-rules
sudo udevadm trigger

Log out and back in after changing group membership.

Quick checks

• Use a current Chrome or Edge browser on desktop or Android.
• Choose Connect via Bluetooth, then select the badge by its displayed name or ID, such as iledcolor-5F0D.
• The site detects Badge Magic / LSLED and iLEDColor / SPOTLED 48 × 12 badges automatically.
• Disconnect the phone app first; only one device can control the badge.
• On Android, allow Chrome’s nearby-devices permission. Older Android versions may also require Location to be enabled.
• Try a short message first to verify a compatible variant.