I am using MiWi Pro wireless networking protocol and I was running some tests with unicast function, but I encountered a problem.

Unicast Main Issue: The end device doesn't receive the messages from its parent coordinator whether the unicast message is sent using the short or long address of the end device.

So let's say we have this configuration.

Coordinator1 has short address of 0300 AND End_Device1 has short address of 0301

So these are the things I noticed ..

Sending a unicast message from Coordinator1 to End_Device1 either by short or long address doesn't work. However, sending a uincast message from the End_Device1 to Coordinator1 works fine.

I also noticed when you send the message from Coordinator1 to End_Device1, Coordinator1 receives the message even though its the one who sent it. It's really strange because End_Device1 should be receiving the message.

What do you think is preventing the parent coordinator from communicating with its end device and what can be done to fix it?

Coordinator1 if it's the root coordinator it must have the address 0000. you may have some routing problem otherwise.

Are you sure about the address of the end device ? The library is quite confusing on it. I've got a similar problem up to the point I realize the address I toke for the device was actually not the correct one.