The Mobile App Controller; The Ground Effect; Charging The Battery - Bitcraze Crazyflie 2.1 User Manual

The mobile app controller

The controls on the gamepad or mobile app have the following mapping:

The ground effect

When the copter is flying close to the ground (less than a few decimeters above the ground)
it is affected by what is called the ground effect. The feeling is that the air is slippery, almost
as if it is gliding on ice. To avoid this, particularly when learning to fly, use a lot of thrust just
when taking off and then ease off for level flight.

Charging the battery

To charge the battery of the Crazyflie 2.1, just plug in a micro USB cable. Make sure the
Crazyflie is powered on. While the battery is charging, the back left blue LED will blink.
When the LED is fully lit the battery is charged.
Specifications
Weight: 27g including battery
Size (WxHxD): 92x92x29mm (motor-to-motor and including motor mount feet)
Operational temperature range: 0°C to 50°C
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