Abstract: In accordance with various aspects, a portable device tracking system can comprise a sensor device operatively coupled to a mobile object. The sensor device can comprises a microcontroller, a sensing unit coupled to the microcontroller, the sensing unit comprising a Global Positioning System (GPS) receiver to receive geographical data, and a transceiver coupled to the microcontroller. The portable device tracking system can also comprise a data manager configured to receive the geographical data from the sensor device. The sensor device can transmit data to the data manager across a network using a variety of communication protocols. Further, the portable device tracking system can be used to various applications, such as tracking an asset, a living object, a vehicle, or a medical device.