SmartSolo nodes are the perfect choice for underground space exploration projects in urban areas. They are compact, lightweight, rugged and equipped with different types of spikes to handle complex terrain environments. Micro-seismic detection through SmartSolo node devices is free from urban electromagnetic interference, offering highly reliable data for engineering exploration such as underground space exploration. With SmartSolo, projects such as human defense, nonuniformity sedimentation surveys, and even collapsed road surface surveys have been successfully completed.