Configure your smart switch to work with Tasmota open source firmware.
Sonoff T1 - Tasmota
Sonof Stansonoff Tx Ultimate Smart Wall Switch - Wi-fi, Alexa
TX Ultimate - SONOFF Official
How to Install the SONOFF TX Ultimate: A Complete Tutorial
Sonoff T1 EU 1 Gang Switch Configuration for Tasmota
Sonoff TX Ultimate US 1 Gang Switch (T5-1C-120) Configuration for
Sonoff TX Ultimate T5 EU 1C 1-channel Smart WiFi Wall Touch switch
Sonoff T1 - Tasmota
SONOFF TX-T1 - TX-T3 EU1/2/3 - WiFi - 433MHz - TASMOTA - Alexa
SONOFF TX WiFi Smart Light Switch, 2.4GHz Wi-Fi Touch Smart Wall
SONOFF T3 EU AC 100-240V Gang TX Series WIFI Wall Switch 433Mhz RF