minifindings Semi-permanent FCC mode

Semi-permanent FCC mode

Open edyno opened this issue 3 years ago • 7 comments

Hello friend. I have an idea how to make semi-pernament FCC mode. However, since I have very little Linux knowledge, maybe you can help me. I found by measuring the TX power and testing the RC that if I change the "country = ??" to "country = US" in the "/etc/amt/wifi.conf" file, RC always switches AC to FCC mode. Of course, if I connect the apk before turning on the engines, the apk will change FCC mode back to CE mode. The solution would be to write the code :: "sed -i 's/country=../country=US/' /etc/amt/wifi.conf" somewhere in the code after the RC is booting. This cause that each time the RC is switched on, it always switches to FCC mode. And if we connect the apk after starting the engines, the FCC mode does not change back to CE mode.

Note: Using the "disable_country=1" switch will permanently switch to FCC mode, but with a lower TX power than using "country = US" or fake gps.

Measured TX power (not totally exact) :: CE mode ~ 2 dB (country = SK) FCC mode ~ 18 dB (country = US) disable_country=1 ~ 10 dB (country = ZZ)

Mavic Mini FCC, firmware:: .300, apk DJI fly version 1.1.2

Sep 23 '20 17:09 edyno

FCC mode ~ 18 dB (country = US) disable_country=1 ~ 10 dB (country = ZZ)

Hello. How do you measure?

Sep 28 '20 11:09 Dees7

By my homemade RF power meter. (In order:: TX antenna RC - gap 14cm - RX antenna of power meter.)

Sep 28 '20 12:09 edyno

By my homemade RF power meter. (In order:: TX antenna RC - gap 14cm - RX antenna of power meter.)

Dear edyno Could you please write to me personally because I woud like to ask something about your progress of mavic mini. You can reach me by korikmate [at] gmail (dot) com. thank you

Oct 01 '20 10:10 korikmate

I think the problem is persistence. The FS looks writable but changes are not persisted across restarts. If you touch a file, it will disappear if you restart the RC.