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Replace RS-232 with 802.11n wireless

Posted: 09 Jul 2009 ?? ?Print Version ?Bookmark and Share

Keywords:RS-232? A/D converter? microcontroller?

The monitoring and control of medical equipment and devices are often carried out from a separate controller or server. The server may be in the vicinity of the equipment or may be at a remote location. Traditionally, a common means of connecting the two is via an RS-232 serial interface. Consider a set of sensors controlled by a sensor unit. The accumulated data is transferred to a monitor via a serial interface.

The multi-channel A/D converter is typically within the microcontroller unit. The periodically sampled data is encapsulated in a predetermined packet format and sent on to the Monitor via the UART interface of the microcontroller.

The applications running on the microcontroller and the monitor (or server) ensure the means to transfer the sensor data meaningfully. The device application encapsulates the data using a protocol negotiated with the receiver of the data (the server in this case). The obtained data would be de-capsulated on the corresponding peer before passing it to the application.

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