ArduPilot ArduCopter Source Code Compile, Upload, and CLI with APM 2.5 using Arduino IDE

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I've been wanting to work with the ArduPilot source code outside of Mission Planner. This video walks you through downloading the source code from GitHub here:
Downloading a special version of the Arduino IDE for use with APM 2.5 from here:
And using the command line interface (CLI) to view and set params. I also demonstrate how to modify the source code for different flight modes, compile, and upload it to your board.
I'm hoping to do more with the source code in the future, but this is as far as I've gotten for the time being.
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