Settings panel

The Settings panel slides down from the top of the screen and exposes device-level controls that don’t belong in the dashboard config (because they are per-device, not per-tune).

If a setting silently doesn’t apply, the tuner’s Logs route surfaces what the firmware actually did with the request — handy to confirm the NVS write landed or to spot a Reboot to apply hint.

Open / close

Gesture	Action
Swipe down from the top bar	Open Settings
Swipe up while open	Close Settings
Tap the top bar with Settings open	Close Settings

There’s a short suppression window (~300 ms) after a swipe-down opens Settings so the same touch doesn’t immediately close it (a tap on the top bar near the end of a swipe was ambiguous before).

What lives in Settings

Brightness slider

0–100 %. Persisted to NVS under namespace screen_cfg. Applied to the TFT backlight PWM in real time as you drag.

BLE toggle

ON / OFF. Persisted to NVS. Changes apply at next boot — toggling at runtime shows a “Reboot to apply” hint. Turn off if you don’t pair with the mobile app and want to free the ~50 KB DRAM NimBLE reserves.

Calibrate touch

Runs an interactive 3-point calibration. Settings closes itself first so the crosshairs are unobstructed, then re-opens at the end.

Reset touch calibration

Wipes the saved offsets. Next boot uses board defaults and re-runs first-boot calibration. The current session keeps cached offsets so you can still navigate to reboot.

Save / Reset buttons

Save writes all current values to NVS and closes the panel. Reset restores brightness + BLE to their compile-time defaults — does not touch touch calibration.

What’s not in Settings

Dashboard widgets, pages, signals, themes — those live in dashboard.json and are edited from the tuner.