Are ther any examples in the thread sdk to establish communication between two nrf52840 using 802.15.4 radio?for example-To switch on an led on the child when the parent sends a signal.Similar to the blinkey client application example?
I think the OpenThread repository found here will suit your needs. The README contains an example using parent/child configuration between two boards. Furthermore I would take a look at Bjørn's answer in this thread.
