Getting To Know Your Crazyflie; Start Up Sequence - Bitcraze Crazyflie 2.1 User Manual

Getting to know your Crazyflie

First of all, let's look at what is front and back, this is important when flying and also when
mounting expansion decks. The small "bump" (the antenna) is on the front and the blue
LEDs are at the back.

Start up sequence

When the Crazyflie 2.1 is powered on it will automatically go through a short sequence of
events to get ready for flight.
1. Run self tests - the Crazyflie 2.1 checks that the hardware is OK
2. Calibrate sensors - the Crazyflie 2.1 reads its sensors to get base values. It must be
absolutely still to do this, so it's best to put it on a level surface for a second.
3. The front left LED blinks Green multiple times. Crazyflie 2.1 is ready to fly!
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