This is my critical question.
You had not done anything but charged the batteries?
You flight it and seen the problem?
This last statement.
"Before pairing with transmitter it offered me to update to 1.5.40"
So... the long story:
Half a year or so ago, this P3SE decided to return home through a pine tree, ripped the gimbal off (broke the roll arm and the destroyed ribbon cable). I spent a few nights trying to rebuild gimbal using P3S gimbal's parts, but unsuccessfully, as it still dangles erratically and gives "Gimbal motor overload".
So I put this quad on shelf, and flew my
Air2 and arducopters.
Now I decided to refresh my hand skills in the old ATTI mode, which I cannot replicate with
Air2 (Sports mode it still "too smart" and stabilized).
So I decided to bring back this SE into service for practice. First time trying to fly after all that time on the shelf the problem developed. I posted question here. LOVE NZ suggested pairing with remote again.
While pairing, app offered to update to 1.5.40.
Anyway, got the break in the rain today, tried to fly, seems that the longer you fly, the quicker loss of connection happens. I managed to fly through one battery on and off, however after inserting the second battery, it kept failing within a few seconds after takeoff.
By the time it lands and disarms, the connection is back on, I can take off again.
Also in about 3/4 cases of lost connection I could regain control by flipping the right switch (GPS/ATTI) back and forth.
>>I'm guessing the P3S, P3SE use the same remote and mother board.
Nope. Got two P3 Standards in pieces (got them for parts from fishing idiots, so they are all full of sand and salt corrosion), and they are internally quite different, particularly in radio gear.