The V2.1.X features are :

• Support for ESP8266, ESP8285 and standard ESP32 board with at least 1Mb of flash
• Serial/Wifi bridge using configurable port 8888
• Reset settings using GPIO2 pin
• Complete configuration by web browser (Station or Access point) or by Serial/telnet commands
• Authentication (optional) for better security
• Update firmware by web browser for 4MB boards
• Captive portal in Access point mode which redirect all unknow call to main page
• mDNS, this feature is a discovery protocol, it need bonjour installed on computer, supported outof the box by OSX, on Windows and Linux need to be installed
• SSDP, this feature is a discovery protocol, supported on Windows out of the box
• Fail safe mode (Access point)is enabled if cannot connect to defined station at boot.
• Embedded FS uploader and updater
• Basic OLED screen support
• Notifications using Line / Pushover / Email
• DHT sensor support
• Direct pins control using ESP commands