This paper describes a mobile health monitoring system which consists of a portable multifunctional physiological parameters detecting 3AHcare node and a mobile program for real-time data telemetry based on the smartphone with the Android operating system. The 3AHcare node is a health monitoring device with embedding Bluetooth module in it and capable of measuring a subject's ECG, blood pressure, blood oxygenation, respiration, temperature and motion -almost equivalent to the feature set of a

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... spital bedside patient monitor. In the Android Application, we receive physiological parameters such as ECG via the socket connection between the Android device and the detecting module; we process the received data with special algorithms to get steady waves; we store data locally on microSD flash; we display data by waveform and digit; we alarm by threshold algorithm and we realize remote data transmission via TCP/IP protocol. We have evaluated the performance of the monitoring system in capturing, recording, transmitting and displaying ambulatory data and found the system easy to use and with high precision.