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Firmware Writing Tools and Steps

  • Firmware Source: ImmortalWrt Firmware Selector
  • Important Notes:
    • EXT4 version will overwrite all user settings (Overwrite mode - flash this firmware if you need to reconfigure!)
    • SQUASHFS version preserves user configurations after flashing (Incremental mode)

Windows

Download the firmware with the .gz suffix and extract it:

Burn the .img file in the directory to a new device. After selecting the file, click "Write" to start writing.

After success, a prompt will pop up asking you to format the disk—click Cancel. If an error message appears saying "Cannot access...", click OK. The burning process is now complete!

Common Issue:
If your USB drive is still empty after burning, you probably clicked "Read" the first time, which wrote the USB contents into the img file. Solution: Re-extract the firmware and burn it again (make sure not to click the wrong button this time)!

MacOS

For MacOS burning methods, please refer to: https://stepneverstop.github.io/burn-system2raspberry-in-macos.html

  1. Download SD Memory Card Formatter to format the USB drive.

  2. Command-line or easy burning: Use the image burning tool balenaEtcher

# List all drives
# Enter the command in the terminal: diskutil list
# Here, we get the disk path of the TF card as /dev/disk6

# Unmount the TF card
# Enter the command in the terminal: diskutil unmountDisk + SD card device path
diskutil unmountDisk /dev/disk6
# Output: Unmount of all volumes on disk6 was successful

# Start burning
# Enter the command in the terminal: sudo dd if=path_to_image of=SD_card_device_path bs=1m;sync, and enter the admin password.
# Note: Do not use Chinese characters in the file path. You can change bs=1m to bs=4m to speed up the burning process.
# This process takes some time; for a 400MB image, it takes about 2 minutes.

  1. Eject the TF card/USB drive.
diskutil eject /dev/disk6
  1. Remove the media and install it on the Raspberry Pi.

End.