Managers

A manager owns one function of the board. You reach each one through the Flux object (flux.valves) or its own GetInstance(); both give the same singleton. All managers share the same shape: EnsureInitialized(), IsInitialized(), GetManagerError() (bring-up, shared catalog), GetLastError() (last failed operation), GetSystemDiagnostics(...) and DumpStatistics(). Managers fail closed: a manager is initialised only when every part it owns came up (Errors and diagnostics).

Member	Manager	Does	Start-up
flux.comms	CommChannelsManager	Valve SPI bus, ADC SPI bus, CAN, UARTs on demand	Required
flux.nvs	NvsManager	Three NVS namespaces: application data, calibration, configuration	Required
flux.gpio	GpioManager	Every GPIO-category pin of the pin map, by name or enum	Required
flux.valves	ValveManager	8 solenoid channels (MAX22200) and 6 proportional channels (TLE92466ED)	Best effort
flux.adc	AdcManager	ESP32 ADC channels and the ADS7952 external ADC	Best effort
flux.leds	LedManager	The WS2812 status LED: colours, brightness, status animations	Best effort
flux.temp	TemperatureManager	ESP32 internal sensor, NTC thermistor, MCP9700	Best effort

"Required" and "best effort" refer to what happens when initialisation fails. Which handler each manager owns is on the ownership page.

Each page has the same sections: what the manager is for, its API, an example, its diagnostics, and its pitfalls. The full signatures are in the API reference.