************ Premiere page ************* .. image:: logo_ohmpi.JPG :align: center **Introduction to OhmPi** ************************* This article presents the development of a low-cost, open hardware \ resistivity meter to provide the scientific community with a robust \ and flexible tool for small-scale experiments. Called OhmPi, this basic resistivity meter\ features current injection and measurement functions associated with a multiplexer \ that allows performing automatic measurements with up to 32 electrodes.\ OhmPi's philosophy is to provide a fully open source and open hardware tool / to the near surface scientific community. .. note:: Everyone willing to get involved is welcome in ohmPi Project!.