Mysa Firmware 4.5.16 — Smart Thermostat

Last updated: May 20, 2026

Version: 4.5.16 · Released: April 1, 2026 · Type: Firmware · Applies to: Mysa Smart Thermostat

FW v4.5.16 for Mysa for Central HVAC has been rolling out to production.

What's New

  • Auxiliary Heat Staging — enables staged auxiliary/emergency heat control

  • Adaptive Brightness — display brightness now adjusts automatically based on ambient conditions

Bug Fixes

  • Fixed 0.5°C setpoint bug — you can now set a setpoint in half-degree increments and it sticks

  • Other behind-the-scenes bug fixes and improvements