ESP32-C3-WROOM-02-N4, 32-bit RISC-V single-core up to 160 MHz, 4 MB SPI flash, 400 KB SRAM, 2.4 GHz 802.11b/g/n Wi-Fi, Bluetooth 5.0 LE, 3.0 V to 3.6 V supply, –40°C to 85°C operating temperature.