import { ReTerminalVariant } from '../devices-reterminal.constants';
export declare class ReTerminalSysfsService {
    private readonly logger;
    detectVariant(): Promise<ReTerminalVariant | null>;
    readFile(filePath: string): Promise<string>;
    writeFile(filePath: string, value: string): Promise<void>;
    readCpuTemperature(): Promise<number | null>;
    readLedBrightness(ledPath: string): Promise<number | null>;
    findIioDevice(deviceName: string): Promise<string | null>;
    readIioAttribute(devicePath: string, attribute: string): Promise<string | null>;
    getSerialNumber(): Promise<string>;
    getFirmwareVersion(): Promise<string>;
}