RF Processor: TI CC2530, 2.4-GHz IEEE802.15.4 ZigBee SoC.
IMU Sensor: Invensense MPU6500 Motion sensor.
Steer Motor Driver Chip: DRV8833, a dual H-bridge motor driver ic.
NOTE:
the frequency of high speed crystal oscillator on flight-controller main-board is 12MHz, and the processor core operating at 48MHz frequency, so you have to modify the 'HXTAL_VALUE' macro in file 'gd32f1x0.h' to '((uint32_t)12000000)', so that the mcu can run steadily.