I have the OpenIMU330BI EVK and I flashed the firmware VG_AHRS 1.1.3 from Aceinna website. However, only roll and pitch values are available. Does anyone know how I can obtain the yaw value? Do I have to change something in the firmware?

I've used the OpenIMU300RI with VG_AHRS firmware and I believe it was outputting all three yaw, pitch, and roll values.

Any help would be appreciated, thank you.