There are 1 repository under sonoff-s20 topic.
Эта прошивка делает Sonoff Basic совместимым с Apple Homekit
An alternative open esp rtos firmware for the itead.cc Sonoff s20 Wifi socket. Compatible with the Apple HomeKit framework.
Atrium Firmware for ESP devices
Demo of Apple HomeKit accessory server library with mqtt support
Sonoff, Horsky, Lingan SWA1
Firmware for Sonoff Socket S20, this connects to MQTT broker
Native HomeKit support for Sonoff S20, S26, S31 and S55 Outlets💡🛋
SONOFF S20/S26 - Internet Checker and automatic model rebooter with micropython
EspHomekit for microcontroller ESP8266/ESP8285.
Firmware for a Sonoff S20 IoT switch to run with CatBus.
Switching Sonoff Basic and Sonoff S20 (Webserver or MQTT).
Collection of esphome configuration files
(Yet another) custom firmware for the sonoff s20 smart socket