What are some sources of constant smartphone USB connect/disconnect malfunction? RF pollution?

[phad]

Hi, I'm using a Mavic Air 2.

When I start the guided connection process, I switch the remote control on, then as instructed connect it by cable to the smartphone.
However, quite a few times, when I connect the cable to the smartphone, it keeps popping up on and off, continuously, with that "USB device just connected, charge only, transfer files, transfer photos", so that prevents from going any further or powering up the drone, since there is this constant loop, as if the cable was getting removed and connected continuosly.

I tried different cables, tried rebooting the smartphone, tried enabling USB debugging, same issue.

The strange thing about this is reproducibility. Basically it seems as if when I set things up in the highest cliffs it plays up like this, but if I am at home everything works fine first try, with everything else being exactly the same. And I really tried, even swapping cable orientation, swapping cables.
It seems as if when I am at home everything and anything will work, while when I am out on mountaintops it is extremely likely it won't work.

So I am wondering, could it be some kind of RF pollution that gets picked up by the cable(s) that maybe happen to be at 1/4 wavelength and act as antennas?
Or could it be the hot sunny weather?

Hope you could share your experience, thank you.

 

[BossBob]

I’d be checking out the socket you’re plugging the usb into, especially if it’s a lightning equiped iPhone. Fluff gets compacted in there preventing the plug from seating properly. I’ve even seen the very end of cheap lightning plugs break off as the user removes the plug which then stops any other lightning connected working either.

 

[Felix le Chat]

Hi, I'm using a Mavic Air 2.

When I start the guided connection process, I switch the remote control on, then as instructed connect it by cable to the smartphone.
However, quite a few times, when I connect the cable to the smartphone, it keeps popping up on and off, continuously, with that "USB device just connected, charge only, transfer files, transfer photos", so that prevents from going any further or powering up the drone, since there is this constant loop, as if the cable was getting removed and connected continuosly.

I tried different cables, tried rebooting the smartphone, tried enabling USB debugging, same issue.

The strange thing about this is reproducibility. Basically it seems as if when I set things up in the highest cliffs it plays up like this, but if I am at home everything works fine first try, with everything else being exactly the same. And I really tried, even swapping cable orientation, swapping cables.
It seems as if when I am at home everything and anything will work, while when I am out on mountaintops it is extremely likely it won't work.

So I am wondering, could it be some kind of RF pollution that gets picked up by the cable(s) that maybe happen to be at 1/4 wavelength and act as antennas?
Or could it be the hot sunny weather?

Hope you could share your experience, thank you.

Odds-on it's physical. Either the cable, one or both the cable end plugs, the socket in the RC body or the female socket in your screen device.

The only way to narrow down the list of suspects would be to borrow (or buy) another controller to see if the problem persists. Buy a new OTG cable and then borrow the use of another phone or tablet, install the FLY app on it temporarily and experiment.

USB3 cables have been reported as creating slight RF interference, but a standard USB-C to USB-C OTG cable wouldn't.

The only time you would genuinely get a dangerous level of RF interference is if you were in a HIRT (High Intensity Radio Traffic) area (which are marked on sectional charts as being danger areas).