RetroCompass
RetroCompass

TrimUI Smart — Firmware update

Quick answer

Button combo

(hold L1+R1)+POWER

Steps

  1. 1Download the latest TG2040 firmware from the official TrimUI Smart GitHub.
  2. 2Format a microSD/TF card to FAT32 and copy trimui_tg2040.awimg to its root.
  3. 3Power off and insert the card, then power on while holding L1 + R1.
  4. 4Keep holding until the update screen/progress appears, then release.
  5. 5Wait for it to finish; the Smart reboots into the updated TrimUI OS.
Last verified: 2026-06-20Source: github.com

The original TrimUI Smart (model TG2040) takes stock-OS updates as a flashable image from its own official GitHub repository, separate from the newer Smart Pro and Brick. The manual method copies a single trimui_tg2040.awimg file to the root of a FAT32 microSD card and applies it by booting with L1 + R1 held. This is an older device, so always pick the firmware release that matches the TG2040 model.

FAQ

Where do I download the firmware?
From the official TrimUI Smart repository at github.com/trimui/firmware_smart — choose the newest TG2040 release (e.g. v1.0.0).
Is the combo the same as the Brick or Smart Pro?
No. The original Smart (TG2040) boots its update with L1 + R1 held. The newer Brick and Smart Pro use VOL− + POWER instead, so don't mix up the guides.

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