In this project, prototypes of an data acquisition equipment have been developes, based in microcontrollers, for the purpose of diagnosing the conditions of degradadtion of grounding meshes of energized substations. The developed sistem is portable with embedded hardware and software. It captures voltage and current data in a grounding system, in industrial frequency. A wireless sensor network was built, with the informations captured by the data acquisition systems being transmitted to a remote entity using the IEEE802.15.4/ZigBee technologies. The entire system allows the continued and remote avaliation of the grounding system.