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The IOIO-OTG allows Android and PC devices to interface with external electronic hardware over USB. Using the IOIO Java library you can develop Android and PC applications that directly interface with external devices and circuits.
IOIO can operate in USB host or peripheral mode to interface with Android or PC devices. The IOIO can be powered over USB in peripheral mode or using the JST-PH connector 5 to 15 volts. Its primarily a 3.3v device as only some pins are 5v tolerant.
The IOIO-OTG hardware and API support the following:
IOIO Documentation and Software: