Manitobahunter
lvl.4
Canada
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Sean-Bumble-Bee mentions a lot of good points! Set your max altitude for the area you are flying in high enough so that if the drone loses signal connection with the controller, and returns to home on its own, it will clear the tallest obstacle with room to spare.
As he mentioned, you don't want the drone to ascend higher than it needs to, and run into high winds aloft, drain the battery, or worse yet not be able to make headway.
If the drone still has a connection to the controller, but begins an auto return to home due to it calculating you are close to the point of no return with the battery, and then attempts to climb higher and runs into a strong headwind, the calculation will be off and you may not have sufficient battery to make it back home.
If that ever happens, don't push it to the limit and have the drone decide to force land. Pick a spot you know you can safely land and find the drone, and land and go get it.
The Mini 4 has collision avoidance and if your return to home is set too low to clear an obstacle, so long as the drone see's the obstacle, it will attempt to go around it or over it, and continue to return to home.
The plus side of a high set return to home altitude, is often the drone will regain connection to the controller as it ascends.
The Mini 4 has an AR return to home feature, and if you have this enabled in settings, the drone has a look at your AR homepoint and if it thinks there are no obstacles in the way, it won't ascend to the return to home altitude if it doesn't think it needs to, it will calculate a path straight back and decend once it gets closer, and continue to land if you let it.
But collision avoidance is far from perfect, and low light, thin wires and branches, and non reflective objects, as well as a few blind spots results in the possibility of a collision, so don't rely on it. I've found the Mini 4 Pro very good at avoiding obstacles it's approaching head on, and while the Mini 4 has some sideways avoidance, it has a blind spot above it and also below to the rear, so just keep that in mind and all is good.
Collision avoidance does not work in very low light or in the dark!
I've been flying my Mini 4 with the Integra goggles, and yesterday I was cruising down this gully in some hills and the Mini 4 lost connection with the goggles, and did a failsafe return to home, which is a goggles thing. The drone flew towards the hill blocking the signal and went up and over it in a nice smooth motion. I was impressed and a smile of confidence appeared on my face.
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