Vojislav Milivojevic VojislavM

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

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	#if defined(ARDUINO) && ARDUINO >= 100
	#include "Arduino.h"
	#else
	#include "WProgram.h"
	#endif
	#include <Wire.h>

	/*Replace #include "WProgram.h" with the above code to make compatible with
	latest Arduino IDE.*/

	// Converts degrees to radians.
	#define degreesToRadians(angleDegrees) (angleDegrees * M_PI / 180.0)

	// Converts radians to degrees.
	#define radiansToDegrees(angleRadians) (angleRadians * 180.0 / M_PI)

	if [ "$(whoami)" != "username" ]; then
	echo "Script must be run as user: username"
	exit 255
	fi