Configure your smart switch module to work with Tasmota open source firmware.
Shelly support group (English Version) I'd like to install a Shelly 1PM behind a wall plug….
Shelly Plus 1 ESP32 Smart Relay TASMOTA and Home Assistant
Shelly Plus 1 ESP32 Smart Relay TASMOTA and Home Assistant
Shelly Plus PM Mini Energy Meter (SNPM-001PCEU16) Configuration for Tasmota
Shelly Plus 1 ESP32 Smart Relay TASMOTA and Home Assistant
RevK®'s ramblings: Shelly Plus 1 GPIO
Shelly Plus 1 flashing and setup guide/ tutorial - ESPHome - Home Assistant Community
Push Button on Shelly Devices · Issue #4914 · arendst/Tasmota · GitHub
Shelly stock firmware v1.1.0 prevents to install Tasmota · Issue #31 · tasmota/mgos32-to-tasmota32 · GitHub