User guide

UI

Connect the Crazyradio dongle to the Android device with the USB OTG cable.
A pop-up dialog should ask you which app you would like to use with the USB device.
Select the Crazyflie app (“Crazyflie Client”).
When you run the app for the first time, you can scan for the Crazyflie (must be switched on).
- Preferences button → Connection Settings → Radio Scan
- Or you can set channel and data rate in the preferences manually
Connect to the Crazyflie by clicking on the connect button.
If the connection is established, the connect button should have a green background and the green LEDs on the Crazyflie and the Crazyradio should blink rapidly.

Please note:

Your Android device must support Bluetooth LE (Low Energy) 4.0 and run Android 4.4+ (eg. Nexus 4, Nexus 5, Samsung Galaxy S4).
Make sure that you have not paired your phone with the Crazyflie 2.0 via your phone's general Bluetooth settings, otherwise the app will not be able to connect properly (connection will claim to be successful, but controls won't work).
The (old) Crazyflie does NOT support Bluetooth LE, only Crazyflie 2.0 has support for it.

To start a Bluetooth LE connection just make sure that no Crazyradio is connected.
If you have not turned on Bluetooth on your phone you will be asked to turn it on.
Connect to the Crazyflie by clicking on the connect button.

Sometimes it might take a few seconds and it might fail the first time, in that case please try again.

If the connection is established, the connect button should have a blue background and the green LEDs on the Crazyflie and the Crazyradio should blink rapidly.