/**
 * Data for a connection event.
 * @category Pixels
 */
export interface PixelSessionConnectionEvent {
    systemId: string;
    status: "connecting" | "connected" | "failedToConnect" | "ready" | "disconnecting" | "disconnected";
    reason: "unknown" | "success" | "canceled" | "notSupported" | "timeout" | "linkLoss" | "bluetoothOff" | "host" | "peripheral";
}
/**
 * List of possible connection statuses for a {@link PixelSession}.
 * @category Pixels
 */
export type PixelSessionConnectionStatus = PixelSessionConnectionEvent["status"];
/**
 * List of possible reasons for a connection event of a {@link PixelSession}.
 * @category Pixels
 */
export type PixelSessionConnectionEventReason = PixelSessionConnectionEvent["reason"];
/**
 * Represents a session with a Pixel die.
 * This class is used to abstract the underlying platform used to connect to Pixels.
 * @category Pixels
 */
export declare abstract class PixelSession {
    protected readonly _systemId: string;
    protected _connStatusCb?: (ev: PixelSessionConnectionEvent) => void;
    private _lastConnStatus;
    private _name;
    /**
     * Instantiates a session with a Pixel.
     * No attempt is made to connect to the die at this point.
     * @param systemId The peripheral system id (as assigned by the OS).
     */
    constructor(systemId: string, name?: string);
    /** Gets the peripheral system id (as assigned by the OS). */
    get systemId(): string;
    /**
     * Gets the Pixel name.
     * @remarks It may be undefined until connected.
     */
    get pixelName(): string | undefined;
    /** Gets the last known connection status. */
    get lastConnectionStatus(): PixelSessionConnectionStatus;
    /**
     * Sets the function to be called when the Pixel connection status changes.
     * @param connectionStatusListener The function called when the Pixel connection status changes.
     */
    setConnectionEventListener(connectionStatusListener?: (ev: PixelSessionConnectionEvent) => void): void;
    /** Release resources used by the session object. */
    abstract dispose(): void;
    /** Connects to the Pixel. */
    abstract connect(timeoutMs: number): Promise<void>;
    /** Disconnects from the Pixel. */
    abstract disconnect(): Promise<void>;
    /**
     * Subscribes to the "notify" characteristic and returns unsubscribe function.
     * @param listener The function to be called when the Pixel connection status changes.
     */
    abstract subscribe(listener: (dataView: DataView) => void): Promise<() => void>;
    /**
     * Sends data to Pixel using the "write" characteristic
     * @param data The raw data to send to the Pixel.
     * @param withoutResponse Whether or not to request the device to acknowledge having received the data.
     * @param timeoutMs The timeout in milliseconds before throwing an error when waiting for the device to acknowledgement.
     */
    abstract writeValue(data: ArrayBuffer, withoutResponse?: boolean, timeoutMs?: number): Promise<void>;
    protected _notifyConnectionEvent(status: PixelSessionConnectionStatus, reason?: PixelSessionConnectionEventReason): void;
    protected _setName(name: string): void;
}
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