Posted by2 years ago
In addition, it offers more practical functions to your aircraft. The SF Racing F3 flight controller is perfect whether you are doing FPV contest or practicing stunt flying and it is suitable for a variety of aircrafts including tricopters, quadcopters, hexacopters, octocopters, fixed wing aircrafts, etc.
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Does anybody know whether this configuration is supported with the SP Racing F3 flight controller?
UART1 -> USB
UART2 -> Sbus Receiver
![Sp Racing F3 Manual Sp Racing F3 Manual](http://wiki.sunfounder.cc/images/d/d0/F3-13.jpg)
UART3 -> MinimOSD
I tried it with SP Racing F3 Acro and everything works correctly except for data transmission from the FC to the OSD. I mean, the OSD is overlaid correctly, but it complains that no data is being received from the FC.
I do know the OSD is setup correctly, as I previously used it with a Naze32. However, I am not sure about the wiring of the FC. Basically, I connected UART3 rx with MimimOSD tx and UART3 tx with MimimOSD rx, which is the way it is supposed to be wired (I soldered 2 bent pins in UART3 for that).
I enabled MSP data (115200 baud) for UART3 in Betaflight. MinimOSD was flashed with the 115200 baud setting. I tried to enable telemetry in Betaflight too, with no avail.
![Betaflight Betaflight](http://copterjungle.de/wp-content/uploads/2016/09/SP-Racing-oben-1020x755.jpg)
I don't really know what else to try, except connect the OSD to UART1, which I don't like as it will interfere with the USB connection when the FC is connected to Betaflight.
What am I missing?
-= UPDATE =-
I tried all the suggested combinations of UART ports and the only one that works for me is OSD on UART1, shared with USB. In that case, I get the both OSD and data transmission with the FC.
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