A cheap and low-power microcontroller family using Tensilica Xtensa LX6 CPU cores with integrated WiFi and dual-mode bluetooth.
The microcontroller uses one or two CPU cores and has a half megabyte big RAM size. The most commonly used embedded operating systems are Arduino and FreeRTOS.
It has a broad support of free development tools, particularly the GNU Toolchain.
It was put to the market by the Chinese company Espressif in 2016.