Questions tagged [f4]

Shorthand for the STM32F4xx series of microcontrollers from STMicroelectronics, commonly used on multirotor flight controllers boards. e.g. STM32F401, STM32F411

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Why doesn't my GPS get any satellites?

I got a new GPS for my Matek f405, and after I set it up and got betaflight to recognize it, I can't get any satellites. It's a BEITIAN BN-220T.
4
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0answers
32 views

How to wire F4-FC-t-motor to FrSky-Xr602t-f2-D16 receiver

I have a t-motor F4 flight controller which I want to wire to a crossover Frsky D16-XR602T-F2 receiver. For power (5v) and ground, it is clear and it works. I connected the ...
15
votes
2answers
499 views

What does it mean for SBUS to be an inverted protocol?

I've heard talk about how F4-based flight controllers can't natively support the SBUS receiver protocol without special circuitry. What does this mean and what hardware is needed to invert an inverted ...