HTTP, websockets, MQTT, ... plus the kitchen sink it seems:
- JSON parsing
- DNS, DHCP and NTP clients
- SOCKS5 proxy support
- DBUS client and server
- Threadpools
- SSH
- JPEG and PNG decoding
- HTML and CSS parsing
- DOM layout and rendering to a frame buffer
- OTA update client
- GPIO, i2c, PWM, SPI
- SSH server
- ACME client
- ...
