  The COVID-19 impacted the teaching; indeed, both schools and universities had
to shift from face-to-face to distance teaching organizing on-line lectures.
Thanks to easily accessible materials, smartphones physics apps, on-line
toolsand devices, it's possible to perform laboratory practice even in this
period. In this paper, a method to measure the gravitational acceleration by
oscillation of a simple pendulum, using Arduino board, is presented.
