Good Morning,
I am trying to forward the type Message from a Class using MoteIF.
Whatever I triy, I always get the error below, even if I call
mpc.processMessage() without argument!
Can we not send the type Message any further?
Thank you for your help!
Class using MoteIF:
public void messageReceived(int dest_addr, Message msg) {
if (msg instanceof AM_MultiPacket_Msg)
{
mpc.processMessage(msg);
}
____________________________________
MPCoordinator class (mpc):
import net.tinyos.message.*;
...
public void processMessage(Message msg){
AM_MultiPacket_Msg mpmsg;
if(msg instanceof AM_MultiPacket_Msg){
mpmsg = (AM_MultiPacket_Msg)msg;
}
The error I get:
Exception in thread "Thread-4" java.lang.NullPointerException
at MoteIFExtension.messageReceived(MoteIFExtension.java:80)
at net.tinyos.message.Receiver.packetReceived(Receiver.java:218)
at net.tinyos.packet.PhoenixSource.dispatch(PhoenixSource.java:160)
at net.tinyos.packet.PhoenixSource.packetDipatchLoop(
PhoenixSource.java:
152)
at net.tinyos.packet.PhoenixSource.run(PhoenixSource.java:169)
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