RC Throw Meter App allow you to build your own Bluetooth throw-meter for a very reasonable cost. It doesn't require any soldering or cabling. You just need to have access to a 3D printer and that is all! The component is the BWT61CL/BWT901CL from Wit Motion, a 6 axis Bluetooth attitude angle sensor with battery incorporated. It is based on the JY61 sensor, has Bluetooth or serial connectivity, integrates a dynamic Kalman filter algorithm, an internal voltage stabilising circuit module, voltage 3