The ArduPilot Mega is a complete open source autopilot system. Its design come from 3DRobotics and it 100% compatible with APM2.5.2. It allows the user to turn any fixed, rotary wing or multirotor vehicle (even cars and boats) into a fully autonomous vehicle; capable of performing programmed GPS missions with waypoints. This version comes with the RC/Servo connectors unsoldered, so you can choose between straight or right-angled ones, both of which are included.

Features:

Arduino Compatible

Includes both right angle and straight pins for I/O, allowing user to customize as needed.

Includes 3-axis gyro, accelerometer and magnetometer, along with a high-performance barometer

Onboard 16Mbit Dataflash chip for automatic datalogging

Digital compass powered by HMC5883L chip, included on the main board.

Invensense's 6 DoF Accelerometer/Gyro MPU-6000.

Barometric pressure sensor upgraded to MS5611-01BA03, from Measurement Specialties.

Atmel's ATMEGA2560-16AU and ATMEGA32U-2 chips for processing and usb functions respectively.

Board schmatic and layout with EAGLE files:

Features:

·Standalone GPS receiver

·u-blox NEO-6M GPS module

·EEPROM for save configuration permanently

·Build in 25X25mm active antenna

·UART (TTL) port with EMI protection

Features
•Small size and light weight
•Available in 915MHz or 433MHz variants
•Receiver sensitivity to -121 dBm
•Transmit power up to 20dBm (100mW)
•Transparent serial link
•Air data rates up to 250kbps
•MAVLink protocol framing and status reporting
•Frequency hopping spread spectrum (FHSS)
•Adaptive time division multiplexing (TDM)
•Support for LBT and AFA
•Configurable duty cycle
•Built in error correcting code (can correct up to 25% data bit errors)
•Demonstrated range of several kilometers with a small omni antenna
•Can be used with a bi-directional amplifier for even more range
•Open source firmware
•AT commands for radio configuration
•RT commands for remote radio configuration
•Adaptive flow control when used with APM
•Based on the HopeRF HM-TRP radio module, featuring an SiLabs Si1000 RF microcontroller.

Radio Configurator(Air module need a USB-UART tool like FTDI to configure): Board schmatic:

Other
 •Dimension: Air / Ground module(no include SMA connector) : 17mx35mm / 17mmx59mm
 •Weight: Air / Ground module: 4.6g/16.8g(include cable and antenna) / 7.2g/17g(include antenna)

·Rechargeable battery for backup/hotstart

Default parameter

·Baud rate : 9600   

Other

·Dimension: 28mmX33mm

·Height: 12.5mm

·Weight:16.5g/18.9g(include cable)

·Hole diameter: 3.1mm