Sonoff basic is often installed out of reach.
Online control using the app is possible,
Delay in operation, e.g. on fluorescent light
Like an RF model switch.
Please develop a switch connected to WiFI.
App selects the sonoff device to be connected to the switch and controls it using functions such as click (on), double click (off), and long click (dealay off).
The regular light switch size is fine.
I think it's okay to combine a bunch of little switches together like a puzzle.
It's either a separate battery supply.. or
I think it would be nice to combine multiple switches to connect the 5v power supply lines.