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Espressif ESP32-C3

The ESP32-C3 is an Espressif system-on-chip built around a single 160MHz 32-bit RISC-V core (RV32IMC: the integer base plus the multiply and compressed extensions, with machine-mode CSRs and traps). It integrates 2.4GHz WiFi and Bluetooth Low Energy alongside SRAM, external flash over a cache, GPIO, a UART, timers and an interrupt matrix. It is a popular low cost connected microcontroller, and here it runs real bare-metal firmware on a from-scratch RISC-V interpreter.