MultiWii

Hi everyone

I've been very happily flying my aerial photography Hexacopter using MultiWii 2.1 for the last few years:



I have a Flyduino FMP04 GPS BOB module wired into an old ATMega1280 Flyduino flight controller (using a FreeIMU 0.4.3 IMU board). I did try to tune the GPS position hold but I was never very satisfied with the results. From memory (this was a good year or more ago) the craft would sit in a stable hover with Position Hold mode active, and then it would slowly start drifting around in ever increasing circles.

My main question is: is it worth upgrading to 2.2 or 2.3 and then having a go at re-tuning the Position Hold again? Are there significant improvements in GPS Position Hold code in these later versions? I imagine I will need to re-tune the PID values again too?

Many thanks for your help

David

Backup up all settings and hope you have source code v2.1 somewhere...the try v2.3 and if you're not happy...go back to v2.1.

We have 2.3 in our machines. HObby king multiwii board with GPS. Same deal. It holds for awhile (minute or so?) then starts to drift around bigger and bigger circles. This is when it works. Every once in awhile it will just dive the aircraft into the dirt. When this happens it happens so fast there's no chance of recovery. One second your swithing on hold then next you have parts scattered all over the field.

Here's the result of flipping on GPS hold about an hour ago.


Has anyone else ran into something like this? We're all stumped on this one. The GPS hold was working fine and being used on this machine just two days ago.

Thanks!

-jim lee