HedgeTrimmer
Second Officer
United States
Offline
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2wenty Posted at 2018-4-30 16:42
I pretty much give up. Just tired to plug into dji assistant 2 to downgrade firmware to see if that would help and I can’t get it to connect at all. After being on for a few minutes the gimbal started freaking out and the fan doesn’t come on at all now. Won’t connect to controller either.
Hey 2wenty, I have been playing with my CrystalSky and Mavic Pro near my Jeep, parked on concrete driveway with metal mesh, with metal garage door behind Jeep and large metal underground shelter in garage. I would consider this a near worst case scenario for magnetic interference - short of placing a liberated strong disk drive magnet nearby.
I know your original problem was with Mavic Air. But no Mavic Air here to play with.
What I found was the CrystalSky's compass was more sensitive to Jeep's magnetic field than Mavic Pro. I had to get CrystalSky with in 2-1/2 feet of Jeep near middle of rear passenger door to get a deviation of about 10-degrees. (Estimated since there isn't digital readout on display). Stepping back about 5 feet and no discernable compass interefernce.
As for Mavic Pro, I had to get it within 1-1/2 feet of same area of Jeep to get about 5-degree deviation (again estimated) out of Red Arrow on map. I was able to get GO 4 app to show Red Compass Error for Mavic by holding Mavic about 3-inches above Jeep's engine hood. When I placed Mavic Pro on roof of Jeep, it would give a Red Compass Error. But when I moved Mavic Pro to center of glass sunroof, the Red Compass Error went away, and GO 4 / Mavic Pro was ready to fly, and Red Arrow on map was back to pointing correct direction.
Continuing on, I tried powering down and powering back up both RC & Mavic Pro with it setting on concrete within 1-1/2 feet of Jeep. First time, GO 4 app Red Arrow on map showed about 10-degree deviation. I moved Mavic Pro slightly, then did another power cycling, this time GO 4 App reported Red Compass Error. I am guessing I had put Mavic down near rebar or cross point of metal mesh in concrete. As I moved Mavic Pro back about 2-foot away diaganionally, the Red Compass Error message went away, again GO 4 was read to fly, and Red Arrow on map was pointing correct direction.
When I can, I plan to do some more testing on another concrete area that I know has heavy metal mesh in it, and I can park a CTL (about 6-tons of steel) on concrete to see how much magnetic compass interference all that steel causes.
Again, sorry to hear about your replacement Mavic Pro being a failure.
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