– Arduino Nano 33 IoT – small, secure, and Internet-connected. (Pre-order here with headers or here without headers) – Arduino Nano 33 BLE – small, low-power, and Bluetooth-connected.

The Nano 33 IOT costs $18, offering Wi-Fi and Bluetooth connectivity. It's powered by the SAMD21G18A microcontroller, runs up to 48 MHz with 256KB of flash and 32KB of RAM.

Nano 33 BLE Sense Rev2: A revised version of the Nano 33 BLE Sense with some of the sensors replaced. Nano 33 IoT: Equipped with Wi-Fi and Bluetooth connectivity for IoT applications.

For example, the Bluetooth versions that were used in the 1990s and 2000s are actually a completely different protocol from that which most modern devices are using.

There’s an “IoT” version with an Arm Cortex-M0+ SAMD21 processor, 6-axis IMU, plus a uBlox NINA-W10 modules which is an ESP32-based board for WiFi, Bluetooth, and cryptography features.

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.