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DFRobot FireBeetle ESP32 E IoT Microcontroller with Header (Supports Wi Fi & Bluetooth) Basic Component Kit for Projects perfect for FPV racing circuits perfect for FPV racing circuits and competitive drone events The optical heart rate sensor provides accuracy within plus or minus 5 beats per minute under normal conditions when properly worn These enhancements make it specifically designed for battery powered IoT applications where power efficiency is critical with dedicated ADC pins for analog sensor inputs and PWM capable pins for motor control
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