In this project, prototypes of a type of data acquisition equipment based in microcontrollers have been developed, for the purpose of diagnosing the conditions of degradation of grounding meshes of energized substations. The developed system 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 information 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 evaluation of the grounding system.