EMAX Skyline32 Flight Controller AdvancedThe skylin32 runs the open-source Cleanflight flight control (FC) software which has an ever-growing community of friendly developers and users. Being open-source means that you too can contribute to the system. Selling points: Cleanflight & Baseflight supported. (SKYLINE32 is loaded with Baseflight-Configurator) Unique wire-to-board connectors, wiring easier! Thin and light design, reducing overall weight saving mounting space! With compass sensor, no deviation! Barometer,Accelerometer included(Advanced Version) Adapting high quality electronic components & high precision SMT. Features 32-bit ARM micro processor running at 3.3V / 72MHZ. With gyro, compass, extended reservation position for accelerometer, barometer. Manual mode, Angle mode, Horizon mode, heading hold mode, head-free mode, Altitude hold mode (this mode is available in advanced version) Support Quad-,Tri-,Hex- ,various multirotors. Flexible RC input: standard, CPPM (PPM SUM) Battery voltage monitoring and low alarm. Micro-USB: Flashing firmware & adjusting parameter Parameters adjustment interface: Baseflight-Configuration. GPS position hold / “Go home” function(GPS Optional). Specification: Dimension: 35mm x 35 mm x 5 mm (30.5mm Mounting) Weight: 4.5 g (W/O wires) Included: 1x SKYLINE32 2x RC breakout cable Note: SKYLINE32 hardware is compatible with NAZE32 firmware, including cleanflight, baseflight. Below are the links to the source codes: https://github.com/cleanflight/cleanflight https://github.com/multiwii/baseflight SKYLINE32 is loaded with baseflight and Baseflight-Configurator GUI. This manual is a baseflight Setup Tuning Guide for SKYLINE32. If you are using cleanflight firmware, please refer to the below link to download and install cleanflight Configurator: https://chrome.google.com/webstore/search/cleanflight?utm_source=chrome-ntp-icon Note: with firmware and configuration based on “MultiWii” software, the processor used is not Atmel AVR, and can not be compiled via Arduino or other AVR tools. Below is some information about STM32 development: http://code.google.com/p/afrodevices/wiki/STM32Development