Is it possible to add a wireless switch to an existing wired, 3 way light circuit? Essentially, it would become a 4 way. This is for a very old home where additional
![Add battery operated wireless switch to existing light fixture without Internet, smartphone, or neutral - Connected Things - SmartThings Community Add battery operated wireless switch to existing light fixture without Internet, smartphone, or neutral - Connected Things - SmartThings Community](https://cdn.shopify.com/s/files/1/0218/7704/products/ecolink-z-wave-plus-automated-toggle-wireless-light-switch-tls-zwave5-thumbnail_grande.jpg?v=1549852306)
Add battery operated wireless switch to existing light fixture without Internet, smartphone, or neutral - Connected Things - SmartThings Community
![SkylinkHome TB-318 Wireless Stick-on or Wall Mounted Battery Operated Anywhere Wall Light Switch Remote Transmitter, Dimmer Switches - Amazon Canada SkylinkHome TB-318 Wireless Stick-on or Wall Mounted Battery Operated Anywhere Wall Light Switch Remote Transmitter, Dimmer Switches - Amazon Canada](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61eFIBAbXFL._AC_SY355_.jpg)