Ground OSD based on (micro)minimosd and a HC-05 BT Module. Telemetry - Data (S.Port) will be received via BT from RC-Transmitter (Taranis with a HC-05 in battery tray).
Build Steps:
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Get the Hardware 2 x HC-05 Module , MicroMinimOsd , 2 x 5V Regulator , inverter for s.bus , plug for Taranis uart port
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Config one HC-05 as master, set the baudrate 57600 , pair with the other slave HC-05
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Connect uart port plug , 5V Regulator , Slave HC-05 and place it in the Taranis battery tray
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Config your OSD in function void vUpdateOsd() and flash the osd
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Connect OSD, 5V Regulator and Master HC-05 (Optional: Ground battery to the osd battery input) to video receiver and monitor.
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enjoy :)
useful links:
https://github.com/opentx/opentx/wiki/Taranis-serial-port
https://oscarliang.com/ctt/uploads/2015/12/sbus-inverter-diagram-schematics.jpg
http://www.banggood.com/HC-05-Wireless-Bluetooth-RF-Transceiver-Module-For-Arduino-p-74220.html
http://www.instructables.com/id/AT-command-mode-of-HC-05-Bluetooth-module/?ALLSTEPS
Special Thanks to:
https://github.com/opentx/opentx
https://github.com/UncleRus/MultiOSD