At the heart of the Nano 33 BLE Rev2 is the nRF52840 microcontroller, which comes with 1MB of CPU Flash Memory. The board runs on the Arm Mbed OS, an open-source operating system that works ...

Wi-Fi and Bluetooth Connectivity: Equipped with the ESP32-S3 microcontroller—a fan favorite in the IoT community—this board is fully Arduino-ready and supports wireless and Bluetooth connectivity.

Powered by the ESP32-S3 (Ublox NORA-W106-10B) microcontroller, the Nano ESP32 packs serious performance into the Nano form factor, featuring: 8 MB internal PSRAM / 16 MB external flash memory ...

It has almost similar specifications as the Nano's microcontroller, which features 16 MHz clock speed, 32 KB flash memory, and 1 KB EEPROM. However, it comes with a slightly larger SRAM of 2.5 KB.