Matioupi
lvl.4
Flight distance : 922569 ft
France
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Spaners Posted at 2017-8-25 10:35
You lucky sod, wish mine was on fcc setup
you obviously know a thing or two about these things
Do you know if it is possible to change the region on a nexus 7 (2nd gen) DJI recommend these as being compatible, the problem is the EU version can not see the required 5G8 channels where as a US version can.
Hello,
first I did not knew that much before buying the Spark, I'm in the learning curve (I admint I have quite good tech background that makes it easier)
second, I did not hack anything on my Spark system at any level. It is a real question to DJI mods why I'm locked in US mode... Even without OTG. The only exotic setup is at the "phone" device level were I've been trying a custom android device, but running the full official DJI GO 4 app.
Last thing about your questino : as far as I understand it from what I can see on my devices, the regulatory domain for a WifI link seems to be driven by the access point (AP which in our case is RC for those with RC and it must be Spark when no RC is at play). At least is what my tests shows.
The router / access point broadcasts its regulatory domain and once the client (phone, bird) is connected, The client sticks to those rules according to its internal regulatory database.
My guess (only hypothesis) is that some Android phones / OS versions / kernels get confused when they were first connected to some kind of regdom (e.g. FR or EU) and then told to go to US. It could even be that the cellular layer is sayong something else wich must end in a big mess...
Maybe some phone are using a too old database too (e.g. in Europe, the 5 GHz channels used by DJI where allowed only since 2014 and many kernel stacks are 3.10.xxx and those layers may not have been fully updated by developpers. They may even have purposely disabled those channels for compatibility when the phone is used as an access point)
As far as I can say, I had better results with starting the device with WifI OFF and everything else in Airplane mode, no other network recorded to prevent auto connect vefore connecting to RC or Spark, and turning Wifi On after device booted up.
I'm only using devices without cellular so far (dedicated to the Spark)
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