ESP32

The ESP32 is Espressif Systems' powerful, low-cost Wi-Fi and Bluetooth System-on-Chip (SoC): a dual-core microcontroller engineered for high-performance IoT applications.

This is the go-to microcontroller for IoT: the ESP32 chip integrates 2.4 GHz Wi-Fi (802.11 b/g/n) and dual-mode Bluetooth (v4.2 BR/EDR and BLE) onto a single, scalable platform. Its core is a dual-core 32-bit Xtensa LX6 processor, clocked up to 240 MHz, delivering up to 600 DMIPS performance. The architecture includes 520KB SRAM and an Ultra-Low-Power (ULP) co-processor, making it ideal for battery-powered devices. With 34 GPIOs and robust security features, the ESP32 is the industry standard for everything from smart home automation to industrial sensor networks.

https://www.espressif.com/en/products/socs/esp32