/// <summary>
/// Returns the value of the attribute from the remote attribute. If the current value is newer than refreshPeriod
/// (in milliseconds) then the current value will be returned, otherwise the value will be requested from the remote device.
/// </summary>
/// <param name="refreshPeriod">the number of milliseconds to consider the value current</param>
/// <returns>an Object with the attribute value, or null on error</returns>
public async Task <object> ReadValue(long refreshPeriod)
{
if (IsLastValueCurrent(refreshPeriod))
{
return(LastValue);
}
return(await _cluster.ReadAttributeValue(Id));
}
