- u -
- u32 : i2s_sample_t
- uart_nr : smg_uart_ , smg_uart_config
- udp : UdpConnection
- unit : NanoTime::Time< T > , NanoTime::TimeValue
- unknown0 : STORE_TYPEDEF_ATTR
- unknown1 : STORE_TYPEDEF_ATTR
- unlink : GdbSyscallInfo
- unused : rboot_config
- uri : HttpRequest
- used : i2s_buffer_stat_t
- useDefaultBodyParsers : HttpServerSettings
- User : Url
- user_data : spiffs_t
- userData : HttpServerConnection , MqttPayloadParserState , WebsocketConnection
- useSsl : TcpConnection