Espressif Systems ESP8684 is a single-core RISC-V microcontroller with 2.4 GHz WiFi 4 and Bluetooth 5.0 LE (BLE) connectivity that also integrates 1, 2, or 4MB flash into a tiny 4x4mm QFN package.
The SoC is listed under the ESP32-C2 product family on the Espressif website and can be found in MINI and WROOM modules, as well as the ESP8684-DevKitM-1 development kit. All three parts, namely ESP8684H1, ESP8684H2, and ESP8684H4, are designed to work in the -40 to 105°C temperature range,