Configure your smart switch module to work with Tasmota open source firmware.
Shelly Em - Home Automation - openHAB Community
RevK®'s ramblings: Shelly Plus 1 Mini
Shelly 1 - Tasmota
Shelly EM-120A, Energy Meter, shelly em
How To] integrate a Tasmota device in Home Assistant using MQTT - QNAP NAS Community Forum
Shelly Plus 1 ESP32 Smart Relay TASMOTA and Home Assistant
Shelly Plus 1 Mini Switch Module (SNPM-001X8EU) Configuration for Tasmota
Tasmota: Flashing and setup a Shelly 2.5
Tasmota 2.4GHz Smart Flush Switch Nous L13T - esp8266 Smart Home Switch with Timer, WiFi Switch, Wireless LED Relay Switch 230V - MQTT Home Assistant ioBroker Google Home Alexa : : Industrial
Tasmota - TDM, Tasmotize and TasUI - Scargill's Tech Blog
Shelly Plus 1 ESP32 Smart Relay TASMOTA and Home Assistant
NOUS - Pre-installed Tasmota WIFI touch smart switch - 2 channels
Shelley 1 flashed with tasmota. now what? - Configuration - Home Assistant Community
Temperature Alarms: Using openHAB 3, Tasmota, & Shelly 1, by Rob Clark
Shelly 2 - Tasmota