Most of the smart switch wiring required live and neutral connection. But some old house some time the neutral connection is not available in existing switch box. It may not always possible to bring the neutral connection back into the switch box. in those cases we can use the following switches that can run without neutral wire.
Smart switch – No neutral
Following products does not require neutral wire.
Smart switch – Neutral wire is Optional
Following product can work with or without neutral wire connections.
Smart switches – multi way
You can achieve 2-way/3-way/multi-way using product mobile apps. Abut this will relay on cloud/internet connection. But conventional 2-way/3-way/multi-way control are aways better for reliability. Only few smart devices support multi-way.
Example multi-way control & wiring