With this project you can measure a frequency from less than 1 Hz to about 6.4 MHz, with atomic clock accuracy (fclk_I_O / 2.5 according to the datasheet, which is 16 MHz / 2.5 = 6.4 MHz, but 7.5 MHz ...

This repository accompanies IoT Projects with Arduino Nano 33 BLE Sense: Step-By-Step Projects for Beginners by Agus Kurniawan (Apress, 2020). Download the files as a zip using the green button, or ...