SONOFF WiFi Smart Plug with Power Monitoring User Manual
Ewelink Device Database
GitHub - pFenners/Sonoff-S20-Simple-Wired-Control: Turns the Sonoff S20 in to a simple on/off relay controlled by a external switch/input. Manual override. No wifi
WiFi Contact plug Sonoff S20 - 4controlShop
Alternative to Sonoff S20 EU Type F Smart Socket - Projects made with Blynk - Blynk Community
How To Pair SonOff S20 - YouTube
customise a Sonoff smart relay (esphome 3b) - Roger Frost's home automation
Sonoff S20 WiFi Smart Socket - MicroPython Forum (Archive)
Sonoff S20-EU WiFi Smart Power Plug Socket Wireless Remote Control Timer Power Switch, Compatible with Alexa and Google Home, Support iOS and Android, EU Plug
User Manuals - SONOFF Official
Using With Sonoff Basic — ESPHome
Sonoff S20 Plug Configuration for Tasmota
TUYa Amazon Smart Plug: Good quality for low price!