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--- rc:dev:sport_master [2014/09/16 22:22] – created redox
+++ rc:dev:sport_master [2023/11/24 21:55] (current) – external edit 127.0.0.1
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 ## 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.
+Most of the information comes from the OpenTX firmware, information on the Internet and direct analysis of the communication bus, so it might not be perfectly accurate.
 ## Teensy3
+I don't have anything permanent, it's all on breadboard for now, so there's no schematic. Just connect the __signal__ pin of the sensor to the pin __ 1__ of the Teensy (__TX1__, __PB17__), Gnd to Gnd and... you're done.
+You can power the GPS using the Vin pin of the Teensy, it makes development easier.
+Here's the last code: {{:rc:dev:sport_master:tsysportmaster_20140916.tar.gz|}}
+<note important>This is experimental work. Do this at your own risks.</note>
+## Next ?
+* Forge UBX/NMEA packets from SPort GPS data
+* Serial/SPI/I2C output (something standard =) )
+* Write a TauLabs module, like the existing one for the Hub Telemetry
+* Attiny(25/45, or 85 but it might be overkill) port with serial output, with Low power mode so it can be embedded on virtually any other flight controller
+* Support more sensors