how to differentiates a router or end-device?

could anyone please explain how to differentiates a router or an end-device since they have the same firmware?

An end device would basically be a router with sleep mode settings made. Since it goes to sleep, wakes up only occasionally and can no longer route, it becomes an end node.

Thank you very much, michael.

Can I query a router node? Otherwise is only a traffic control node?

Thank You

Yes, a router is fully functional for whatever its intended purpose (RS232, RS485, etc.) but it routes as well since it doesn’t go to sleep.

Thank You!