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The hardware itself is pretty straightforward. There is an Arduino Nano to run the speech recognition algorithm and a MAX9814 microphone amplifier to capture the voice commands.

The Arduino Nano ESP32 based color handheld console by Volos Projects is a fantastic little project that showcases the power and versatility of the Nano ESP32.

The Nano ESP32 supports both Micropython and Arduino programming languages, providing a clear path for those already familiar with one platform to easily switch back and forth as needed.