APM ArduPilot Mega 2.5.2 Flight Controller Board with 5Hz GPS Module for RC Aircraft Multi-rotor Copter Fixed-wing Helicopter Free open source firmware comes in different versions that support planes ("ArduPlane"), multicopters (quads, hex, oct, etc) and helicopters ("ArduCopter"), and ground rovers ("ArduRover"); Simple setup process and firmware loading via a point-and-click utility. No programming required! (But if you do want to fiddle with the code, you can with the easiest embedded programming toolkit available: Arduino); Full mission scripting with point-and-click desktop utilities Can support hundreds of 3D waypoints; Return-to-launch, loiter in place, "follow me" or just click on the map and tell it to "go to here" (with telemetry option); Auto takeoff and landing; Two-way telemetry and in-flight command using the powerful MAVLink protocol; Choice of free Ground Stations, including the APM Mission Planner, which includes mission planning, in-air parameter setting, on-board video display, voice synthesis, and full datalogging with replay Cross-platform. Supports Windows, Mac and Linux. Use the graphical Mission Planner setup utility in Windows (works under Parallels on a Mac or Mono on Linux) or use a command-line interface on any other operating system. Ground stations are available for all three operating systems. Based on the Arduino programming environment, which is also fully cross-platform; Autonomous takeoff, landing and special action commands such as video and camera controls Supports full "hardware-in-the-loop" simulation with Xplane and Flight Gear; Hardware includes the following: 3-axis gyro / 3-axis accelerometer / 3-axis magnetometer / Barometric pressure sensor for altitude / 5Hz GPS module / Voltage and current sensors for battery status 4Mb of onboard datalogging memory. Missions are automatically datalogged and can be exported to KML / Built-in hardware failsafe processor, can return-to-launch on radio loss Package included: 2.5.2 APM Main Board x 1; 5Hz GPS Module; Cables