/**
* Calculates the maximum response time, in milliseconds, for network
* discovery responses.
*
* @param listeners Discovery listeners to be notified about process events.
*
* @return Maximum network discovery timeout.
*/
private long CalculateTimeout(IList <IDiscoveryListener> listeners)
{
long timeout = -1;
// Read the maximum discovery timeout (N?).
try
{
timeout = ByteUtils.ByteArrayToLong(xbeeDevice.GetParameter("N?"));
}
catch (XBeeException)
{
logger.DebugFormat("{0}Could not read the N? value.", xbeeDevice.ToString());
}
// If N? does not exist, read the NT parameter.
if (timeout == -1)
{
// Read the device timeout (NT).
try
{
timeout = ByteUtils.ByteArrayToLong(xbeeDevice.GetParameter("NT")) * 100;
}
catch (XBeeException)
{
timeout = DEFAULT_TIMEOUT;
String error = "Could not read the discovery timeout from the device (NT). "
+ "The default timeout (" + DEFAULT_TIMEOUT + " ms.) will be used.";
notifyDiscoveryError(listeners, error);
}
// In DigiMesh/DigiPoint the network discovery timeout is NT + the
// network propagation time. It means that if the user sends an AT
// command just after NT ms, s/he will receive a timeout exception.
if (xbeeDevice.XBeeProtocol == XBeeProtocol.DIGI_MESH)
{
timeout += 3000;
}
else if (xbeeDevice.XBeeProtocol == XBeeProtocol.DIGI_POINT)
{
timeout += 8000;
}
}
if (xbeeDevice.XBeeProtocol == XBeeProtocol.DIGI_MESH)
{
try
{
// If the module is 'Sleep support', wait another discovery cycle.
bool isSleepSupport = ByteUtils.ByteArrayToInt(xbeeDevice.GetParameter("SM")) == 7;
if (isSleepSupport)
{
timeout += timeout + (timeout / 10L);
}
}
catch (XBeeException)
{
logger.DebugFormat("{0}Could not determine if the module is 'Sleep Support'.", xbeeDevice.ToString());
}
}
return(timeout);
}
