Aputure Sidus Four firmware v2.3

Aputure · Released Nov 6, 2025 · First seen Jul 6, 2026

v2.3 is the latest firmware for the Aputure Sidus Four, released November 6, 2025.

What's in this update

Solves Critical Performance Iss​ues and TimoTwo Update Issues Release Date 11/6/2025 Instructions to Update your Sidus Four.

Optimizations

  • Fixed CRMX transmission instability introduced in LumenRadio version V1.1.1.5. Now fully compatible with all versions, including 1.0.7.9. (It is recommended to update your TimoTwo firmware with CRMX Toolbox but is not required.)
  • Improved CRMX transmission performance by optimizing the underlying transmission mechanism. Fixes occasional packet drop when using 8 full universes.
  • Add ​a Wi-Fi data filtering mechanism to improve the accuracy of data reception and resolve user feedback regarding flickering lights.

Update Instructions here.

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Other versions for this product

See the full firmware history for the Sidus Four