We developed a WSN capable of collecting geophysical measurements on remote active volcanoes. Our main goals were to create a flexible, easy-to-deploy and easy-to-maintain, adaptable, low-cost WSN for temporary or permanent monitoring of seismic tremor. It enables the easy installation of a sensor array in an area of tens of thousands of sqm. It can be used to record data locally for later analysis or for continuously transmitting to a remote laboratory for real-time analysis.