DronePosition's psi value is always zero


Product: [Mambo/Swing/Rolling Spider/Airborne Cargo/Airborne Night/Hydrofoil]
Product version: [X.X.X]
SDK version: [X.X.X]
Use of libARController: [YES/NO] (Only for ARSDK)
SDK platform: [iOS/Android/Unix/Python…]
Reproductible with the official app: [YES/NO/Not tried]


I am using Mambo with BLE communication.
Even though drone rotate(yaw), DronePosition’s psi and timestamp value is always zero.
How do I get the psi angle?