linux-rpi-zero2w-led-setup

name	linux-rpi-zero2w-led-setup
description	Raspberry Pi Zero 2 W - LED Boot Indicator Setup. TIL note about linux. Use when working with linux and the user mentions rpi zero2w led setup or related topics.

Raspberry Pi Zero 2 W - LED Boot Indicator Setup

Configures LED behavior:

• Blinks on SD card activity during boot
• Solid on once boot is complete

Setup

1. Add to /boot/firmware/config.txt:

dtparam=act_led_trigger=mmc0

2. Create /etc/systemd/system/led-boot-done.service:

[Unit]
Description=Set ACT LED solid on after boot
After=multi-user.target

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'echo default-on > /sys/class/leds/ACT/trigger || echo default-on > /sys/class/leds/led0/trigger'
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

3. Enable the service:

sudo systemctl enable led-boot-done.service

Available LED Triggers

• none - LED off
• heartbeat - Blinks like a heartbeat
• mmc0 - Blinks on SD card activity
• cpu - Blinks based on CPU activity
• default-on - Always on