The present inventions, in one aspect, are directed to a system comprising a portable sensor device including a housing having a physical size/shape that is adapted to couple to a user's body, an identification tag including identification data which is associated with the sensor device and an identification tag transmitter to responsively and wirelessly transmit the identification data according to a first communication protocol. The system further includes a portable electronic device including an identification tag receiver to wirelessly receive the identification data of the identification tag according to the first communication protocol, transceiver circuitry to wirelessly and responsively communicate with the sensor device according to a second communication protocol, and processing circuitry to instruct the transceiver circuitry, after receiving the identification data, to wirelessly request, from the sensor device the sensor data and/or data which is representative of the sensor data.