I got a s1000+, Inspire 1 and Phantom 3 pro, and after a long concideration I decided to buy the phantom 4 — despite all the negative comments and whining — and took a leap of faith in DJI. The upgrade process went fine, no issues there. I did reset and IMU calibration twice. The "altitude drop" when stoping the p4 is fixed — kind of — it still drops a few inches. But what supprised me though was when I did a 180° turn. Then the P4 droped somewhere between 2-4 meters sometimes. Here is video when it happened, I've shared the entire flight record data from the whole maiden flight session in a dropbox share(1.59gb) https://www.dropbox.com/s/t7nxej ... 9-55-15%5D.DAT?dl=0 .
Unlike some here, this is not a deal breaker for me. I love everything else about the P4. I hope the data I've provided will be of use — and that my P4 don't have any faulty hardware.
I refused to give up, so I solved the issue and here are my steps:
Connected the P4 to DJI Assistant 2(Mac) refreshed the firmware(1.1.411) by updating/installing it again. Then did a factory reset through DJI Assistant 2. Once more I did a IMU calibration and a restart. Then flew a full battery with the P4 and the altitude drop issue was gone.
This post could perhaps help others that are experiencing the same issue. Just do what I did and perhaps that will fix the problem. I really love the way the P4 flies. Much better than the P3. I flew away 1000m + and had no issue with video feedback or weak signal. Also I tired the tracking function, it was great! It was and still is pure joy!
I posted last week that a factory reset improved mine after many complaints to DJI who didn't even suggest doing a Factory reset, had to figure it out myself
I am in the same boat as you! It really bugs me when I see my altitude change without any input. Usually I'm high enough in the sky where it really isn't a big deal, but it still bothers me. If it gets worse I'll be sure to try out a factory reset. I feel like this and the tilted horizon are just bugs in the software. Personally, I have never had such an advanced piece of technology, and it is not a deal breaker for me either. I can modify the gimbal tilt while in flight with the commands, which is bothersome, but after that the video smoothness and overall quality is insane!
1. factory reset
2. Reupdate firmware.
3. Power off.
4. Power ON
5. factory reset
6. Power off.
7. Power ON
8. factory reset
9. Calibrated the IMU on a perfectly flat surface
10. calibrate sensors
11. calibrate Gimbal.
Just did a long distance test, and flew 3415m (11197 feet) with no signal loss or weak TX/RX. Only thing that stopped me was the RTH warning. And I always pay heed to the warnings. Can't express how much I love the new Phantom 4 <3
lvl.2
lvl.4
