Configure your smart switch to work with Tasmota open source firmware.
TASMOTA Smart Dimmer Switch by Martin Jerry Touch Panel Control, Trailing Edge dimmer Light Switch is Better Compatible with LED Bulbs, Needs Neutral Wire and 2.4G Wi-Fi: : Tools & Home
DS-102 3 Gang Switch Configuration for Tasmota
Relay Docathom Tasmota 3-way Wi-fi Relay Switch 16a - Ready-to-go For Smart Home Automation
33: Sonoff Mini and S55: ALMOST perfect – SuperHouse Automation
Building a home automation switch controller “thing” – installing Tasmota on a nodeMCU v3 ESP-12E by LOL1n. – We are All Geeks!
ATHOM US Switch Pre Flashed Tasmota ESP8266 WiFi Switch Touch key 1/2/ – Athom Bridge
Tasmota L1T Wi-Fi Smart Light Switch Instruction Manual
ATHOM US Switch Pre Flashed Tasmota ESP8266 WiFi Switch Touch key 1/2/ – Athom Bridge
Creating a smarter light switch - NotEnoughTech
Tasmota 3 Way Relay
Tasmota US Key Switch
WIFI solar control for swimming pool - Tasmota - Poolthermometer Shop - Smarte Pooltechnik