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SMerrony / tello

The tello Go (golang) package is an unofficial, easy-to-use, standalone API for the Ryze Tello® drone.
MIT License
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Validity flags correctness #13

Closed fab1an closed 4 years ago

fab1an commented 4 years ago

Is this correct, you have Y ordered before X. Also there is an "unused" bit between velocity and position validity. Is it really packed like this?

https://github.com/SMerrony/tello/blob/a195b6550ebf8e7c16fffd043bbd021eef272de2/messages.go#L275

SMerrony commented 4 years ago

It might not be correct. It's been a while since I looked at the Tello stuff, but I remember when we were trying to reverse-engineer these messages there was a lot of discussion about the order of X, Y, & Z values which seem to vary throughout the API.

With the current code it doesn't matter as the three flags are only used together - that was a deliberate decision as it seemed that if any value was invalid then the others could not be trusted.

If you are sure it's wrong then of course I'll change it!

Also, there are quite a few 'gaps' in the data packing - they may or may not contain more information. At the time we had no way of decoding them.

fab1an commented 4 years ago

Ok, thanks.