SmartThings Hardware Compatibility Issue
SmartThings automation actions will work in Kasa with V2 hardware (Firmware 1.5.10) but not V4.1 hardware (Firmware 1.1.0). I have multiple switches of both HW versions. Firmwares all show as being up to date despite being different between hardwares and there is also some variation within the same hardware version. The SmartThings automations I have relay Kasa smart actions between two separate switches. But whereas a V2 switched by Kasa will switch a V4 via the automation it will not work the other way round. In the SmartThings app they all cross link correctly.