Speedybe F405 Wing and Raspberry

ArduPlane Plane 4.6
1

I would like to connect my companion omputer to my FC.

I have been using pixhawk for a while with USB connection to Raspberry.

Now i want to move the raspberry to the speedybee f 405 wing and seems like i can not succes at connecting using USB.

What are the steps to do it? I suspect i missed some parameters…

2

Connection between FC and Companion computer using USB on the FC side is not recommended.

Please use a serial connection instead.

1 Like
3

Oh, ok.

This is more complicated now.
Since i barely know what i am doing, i now need to find the right tx and rx on raspberry and the right rx and tx on the FC.

4

On the pi you can use the USB connection.
But it is very easy to find serial TX/RX pins on the PI. It is well documented.

On the FC side you should use a (non-USB) RX,TX pin pair. Speedybee F405 wing pins are documented.

Use something like an FTDI cable to connect it. There are cheaper alternatives as well.

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5

The pi natively supports UART, the best way is to just use the native UART. It isn’t that hard, and you can power the pi through that too. I used it and it works out great. Note that if you plan on using a full sized pi (no pi pico or pi zero), you’ll probably need a separate power supply. A USB connection is a bad idea, you should just use UART.

FYI: Pinout chart: https://pinout.xyz/

6

I did it, it was quite easy. Now i have issue with picam, buti will deal with it later.

What is best way to power raspberry?

I removed the 5+ volt from telemetry cable, because i think it will not be able to power up the raspberry properly.
I will power it using a 5 amp bec from matek using gnd and 5+ gpio pins.
Is there a better connection point to power the raspberry?

7

Depends on your pi model and your FC max current in telem ports, but yea you probably should just use one of the 5v pads on your FC, that’s probably going to be your best bet.

8

I wired tx and rx from fc to GPIO
Than i wired 5v and GND from bec to GPIO

At the moment i have no low power issue.
As soon as i have my camera working, i will verify if the voltage is still ok.

Thank you!