Fix some known problems

1. Optimize skill mode 2. Fix bugs and improve software stability

1. Fix the problem that "there is already a device connected"; 2. Update the quick guide and interface introduction instructions; 3. The handle and the virtual joystick increase the dead zone by 10%; 4. Optimize the display logic of the three flight modes; 5. Fix bugs and improve APP stability.

1. Fixed the problem that after the remote control is disconnected, the drone deviation. 2. Fixed the problem of downloading video resources from the library, it needs to be downloaded again 3. Add video resources to cancel the download function 4. Fixed the problem that some downloaded resources cannot be deleted

1. Optimize GPS positioning 2. Add new user guide to the entry interface 3. Fix the GPS light cutting flow mode, and the GPS warning will not disappear 4. Remove video dormancy 5. Add GPS filtering to avoid GPS jumping 6. Add shutdown cooling reminder 7. Fix the EIS setup hop 8. When the new video is stopped, it indicates that the video has been saved 9. New reminder that standby cannot be recorded 10. Proficiency Settings distinguish between GPS mode and optical flow mode 11. After the new lock screen, keep continuous connection with the aircraft for 3 minutes 12. Optimize video button caton problem 13. Repair the abnormal display of Wifi frequency parameters in network Settings 14. There is no restriction on takeoff when the aircraft is too hot 15. Fix and delete local photos flash back problem 16. After cutting to 4K, the EIS is set off and cannot operate 17. When the bluetooth of the mobile phone is not on, click the handle button to pop up the pop-up window of the system setting

1. Calculate flying distance by GPS location of drone taking off 2. Add protecting rule for joystick disconnecting 3. Fix the issue that data does not been sent when joysticks move to the ends in joystick mode. In this case, the data of channels will be back to the centre position. 4. Replace the button of reversing head to switch of EIS 5. Improve the rule of temperature protection. Drone will execute the rule and App just show the status and limit related buttons 6. Modify the pattern of taking of warning box 7. Add data protection of joystick. Improve the experience of joystick.

1、Modify the body handle style. 2、New proficiency options, adjust throttle acceleration. 3、The new height of the main interface, the GPS mode of the phone, and the display of the resolution in the video mode. 4、The percentage of the remaining memory capacity of the aircraft camera in the aircraft status interface is shown. 5、The sliding take-off length is shortened to 80% to avoid slipping.