Random value from yaw calculation?

[eddyyanto]

I am using MPU-9250/6500 and managed to get the filtered pitch and roll data just fine. But when I tried to calculate the yaw using the below yaw calculation at https://engineering.stackexchange.com/questions/3348/calculating-pitch-yaw-and-roll-from-mag-acc-and-gyro-data

yaw = 180 * atan (accelerationZ/sqrt(accelerationX*accelerationX + accelerationZ*accelerationZ))/M_PI;

The returned value seemed to be a bit random? Any idea?

[peterhinch]

I suggest you use Madgwick fusion which has been tested.

[eddyyanto]

Will do! Thanks @peterhinch! :)

[eddyyanto]

Tried using Fusion and it seemed that my Adafruit Huzzah ESP8266 can't take the big library size:

File "main.py", line 4, in <module> MemoryError: memory allocation failed, allocating 761 bytes

I've cleared up unnecessary files and it keeps throwing me memory allocation failed issue.

[peterhinch]

You probably need to use frozen bytecode also my build scripts as the official docs aren't entirely up to date.

I don't think I've ever tried sensor fusion on an ESP8266.

[eddyyanto]

Thanks for the pointer, @peterhinch! 🙏
I'll give it a shot! I'll close this thread now.