I am using/starting to use a Flyduino Mega and a Frsky Taranis with the X8D, which supports Telemetry via SBUS.
Now, browsing through EZ-Gui, I noticed the FrSky Telemetry-Option. Searching about what's behind this, I found this thread and read most of it. The general process is understood: Connect Serial of the Flight-Controller to the X8D and connect a Bluetooth-Module<-> Serial Module to the FrSky.
On the Taranis-Side:
The Serial Port of the Taranis is described here.
Set Serial-Output to 'Telemetry' (or S-Port mirror??), and set the Baud-Rate to 9600 (or 57600?).
The Bluetooth-Module must support thisTaranis serial port uses RS-232 polarity for RX and TX signals, but it won't output full RS-232 voltage levels (from -15V to +15V) on TX line. The RX input is RS-232 tolerant. Still it will work with most standard serial adapters (even USB serial adapters).
This could by the JY-MCU, but here, it seems like a level-shifter is needed -but I find no specs. But that Guy uses apparently thisBluetooth<->Serial Module.
Any hints on working hardware on the Taranis-Side? Are there no BT-Serial Modules that directly support the right Levels?
Now, coming to the Flightcontroller-Side:
Here we want two things:
a) direct BT-Connection (or rather WiFi?) to EZ-GUI in order to be able to change PID-Settings etc. of the flight controller, when the Copter is in close proximity
here, I think the JY-MCU is confirmed to work, isn't it?
b) Connection to the SBus-Input of the FrSky RX (X8D), for Telemetry via Taranis/2.4Ghz when Copter is flying/further away.
I found some Information on Multiwii-Telemetry via FrSky/Sbus here. I was delighted to see, that one very active Author in that Thread was ezio
Unfortunately, the Frsky-Telemetry code seems to have been working in MultiWii, but not in MultiWii 2.3 anymore. Is that right?
Also, FrSky uses RS232 Voltages here again and not TTL --> another Adapter/Inverter?
Are these two last modules maybe also usefull on the Taranis-Side?
-Can the BT-Serial-Module on the Flight-Controller-Side and the X8D be connected to the same Serial-Port (the X8D is only listening).
-Do I have any benefits using also the SBus instead of PWM to send the normal RX-TX commands (for pitch, yaw, etc) to the Flightcontroller (i.e. higher Resolution etc)?
I added short description to the EZ-GUI help file. It is here: https://docs.google.com/document/d/1_CT ... hMKqUA/pub
Hope it helps you to find some answers.