I build a “Tiny Whoop” with brushed motors using an Spracing F3 Evo Flight Controller (Eachine Beecore F3_EVO_Brushed Flight Control Board For Inductrix Tiny Whoop Eac Sale - Banggood USA → DSM2-Version). When I arm the drone only one motor spins and when I higher the throttle only 3 Motors spin. The fourth one only starts at half the throttle. But when I turn the drone the motor spins → Gyro and Accelerometer are calibrated the correct way.
here are some Videos so you can see what it does: DroneTrest - Videos - Google Drive
Can someone help me with that?