In this project, prototypes of a data acquisition equipment, based on a microcontroller, were developed in order to diagnose the degradation conditions of grounding grids in energized substations. The developed system is portable with embedded hardware and software. It captures voltage and current data present in a grounding system, at industrial frequency. A wireless sensor network was built, and the information captured by the data acquisition systems is transmitted to a remote entity using IEEE802.15.4/ZigBee technologies. The entire system allows for continuous and remote assessment of the grounding system.