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# SmartPort (SPort) Master
## Overview
With the Taranis, I got a GPS using the “SmartPort” interface from FrSky. It's basically a Serial bus on which you can add many sensors, which are (randomly ?) polled by the master of the bus.
* One wire bus ( ⇒ Half Duplex communication ) * Inverted logic * 57600 bauds
Luckily the Teensy3 can do that. If you don't want to mess with voltage conversion, just use a Teensy3.1.
## Teensy3
## Links
I found different projects interfacing the Teensy3.1 with a SmartPort receiver (like the X8R):
* http://code.google.com/p/telemetry-convert/ * https://code.google.com/p/telemetry-convert/wiki/FrSkySPortProtocol * http://diydrones.com/forum/topics/amp-to-frsky-x8r-sport-converter