Arduino Nano 33 IoT [ABX00027] Price: $20.00 (as of 23/11/2020 03:35 PST- Details)

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The ease of use of a Nano board with the addition of secure IoT and BT connectivity
Small (45mm x 18mm), robust and powerful board; 3.3V variant of the Nano family. Arm Cortex-M0+ microcontroller and a pre-certified ESP32-based WiFi and Bluetooth module from u-blox