RetroCompass
RetroCompass

TrimUI Smart Pro S — Firmware update

Quick answer

Button combo

VOL-+POWER(hold until green bar)·(official manual: VOL-+RESET)

Steps

  1. 1On a PC, download the latest file starting with trimui_tg5050 from github.com/trimui/firmware_smartpro_s/releases.
  2. 2Format a microSD (TF) card as FAT32 and copy the extracted firmware contents to the card root.
  3. 3Insert the card into the powered-off Smart Pro S.
  4. 4Hold VOL- then POWER together and release both when the green progress bar appears.
  5. 5Wait for the bar to reach 100%; the device reboots into TrimUI OS automatically.
Last verified: 2026-06-20Source: trimui.com

The TrimUI Smart Pro S is model TG5050, so its firmware comes from the dedicated github.com/trimui/firmware_smartpro_s repository — use the file that starts with trimui_tg5050 and never the TG5040 Smart Pro firmware. Format a microSD (TF) card as FAT32, copy the firmware to the root, and boot holding VOL- + POWER until the green progress bar appears. The latest stock release is 1.0.1 (2025-12-18). Note: TrimUI's official TG5050 manual describes the combo as VOL- plus a brief press of the RESET button rather than POWER; if VOL- + POWER does not trigger the green bar, follow the manual's RESET method.

FAQ

Which firmware file is for the Smart Pro S?
The file that starts with trimui_tg5050 from github.com/trimui/firmware_smartpro_s/releases. The Smart Pro S is TG5050; do not use the older TG5040 Smart Pro firmware (trimui_tg5040).
I don't get a green progress bar. What's wrong?
Usually the card isn't FAT32, the firmware isn't at the card root, or VOL- and POWER weren't pressed together. TrimUI's official manual uses VOL- plus a brief RESET-button press, so try that combo too.

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