Bought an open box P4 (complete, tested was on the box). Looked perfect, plastic still on everything, battery had 2 charges.
So I get it home and charge everything up, both the controller and bird had an update, those went fine. Did an IMU cal, compass cal, RC sticks calibration and camera cal. Everything looks good.
Go to take it up and seems to be flying ok and the horizon was level which was great. I noticed after a few minutes that the height reading was about 180ft when about 2' off the ground and any height I went to it was about that much off (reads higher). The 'VS' reads correctly though when close to the ground so that's weird.
The other problem I see is if I do a quick ascent to , say, 225ft after I let off it will slowly continue to ascend/read higher today going an extra 25' before stopping. THEN it starts a rapid descent on it's own which can be stopped by pressing up on the throttle.
Screwy times. I deleted the go app and reinstalled and went through every setting and found nothing that would possibly cause this.
Thoughts? Other than don't buy open box (was 975 for a complete p4) and 30 day return policy.
So I get it home and charge everything up, both the controller and bird had an update, those went fine. Did an IMU cal, compass cal, RC sticks calibration and camera cal. Everything looks good.
Go to take it up and seems to be flying ok and the horizon was level which was great. I noticed after a few minutes that the height reading was about 180ft when about 2' off the ground and any height I went to it was about that much off (reads higher). The 'VS' reads correctly though when close to the ground so that's weird.
The other problem I see is if I do a quick ascent to , say, 225ft after I let off it will slowly continue to ascend/read higher today going an extra 25' before stopping. THEN it starts a rapid descent on it's own which can be stopped by pressing up on the throttle.
Screwy times. I deleted the go app and reinstalled and went through every setting and found nothing that would possibly cause this.
Thoughts? Other than don't buy open box (was 975 for a complete p4) and 30 day return policy.