also shows the minimal and maximum currents during the measurements; the maximum current of 62mA is mainly due to the consumption of the pulse sensor and the activity of the microcontroller to acquire the data. During the processing of the data acquired the microcontroller needs 2.63mW of power, while the time to process the data (tproc ) is around 0.100ms. During data transmission with BLE connected, the power consumption measured reaches 10.98mW (PBLE ).