Thread is a low-power mesh networking technology, designed specifically for home automation applications. It is an IPv6-based standard that uses 6LoWPAN technology over the IEEE 802.15.4 protocol. You can connect a Thread mesh network to the Internet with a Thread Border Router.
The nRF Connect SDK provides support for developing Thread applications based on the OpenThread stack. The OpenThread stack is integrated into Zephyr.
See Thread samples for the list of available Thread samples.