Hardware
A phone, an IMU, and not much else.
FlySys Swiss PFD is built around an external Bluetooth LE inertial measurement unit for clean, repeatable attitude — with the phone's own sensors as a fallback.
Primary path
Connection Bluetooth Low Energy
Mounting NED or ENU, selectable
Extras battery-voltage reader over BLE
Waveshare 10-DOF BLE IMU
A dedicated 10-degree-of-freedom IMU mounted to the airframe streams accelerometer, gyroscope, magnetometer and barometric data over Bluetooth LE. Keeping the sensor off the phone means attitude no longer depends on how the device happens to be propped on the panel.
The device
Android 8.1 or newer (10+ recommended)
Graphics OpenGL ES 3.0
Radios Bluetooth LE for the IMU path
Fallback internal accel / gyro / mag / baro
Any modern Android phone or tablet
No Bluetooth hardware? The internal-sensor, simulator and replay paths run on an emulator, so you can try the full display before wiring anything up.