SparkFun

IOIO-OTG - V2.2

Name: IOIO-OTG - V2.2
Brand: SparkFun
SKU: SF-DEV-13613
Price: 101.0 AUD
Availability: InStock

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$101.00 |

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The IOIO-OTG (pronounced "yo-yo-O-T-G") is a development board that lets Java developers add hardware I/O capabilities to Android or PC applications. A PIC24...

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The IOIO-OTG (pronounced "yo-yo-O-T-G") is a development board that lets Java developers add hardware I/O capabilities to Android or PC applications. A PIC24FJ256 microcontroller bridges your app to low-level peripherals including GPIO, PWM, ADC, I²C, SPI, and UART, all controllable through a Java library.

The OTG (On-The-Go) design supports both USB host and device modes. When connected to an Android device, the board acts as a USB host and supplies charging current. When connected to a PC (Windows, Linux, or macOS), it presents as a virtual serial port and draws power from the host. Attach a USB Bluetooth dongle for wireless connectivity.

Key Features

USB OTG Support – Auto-detects host or device mode (manual override switch available)
Java Control Library – Write hardware control code as a standard Java app
Rich Peripheral Access – GPIO, PWM, ADC, I²C, SPI, and UART
Cross-Platform – Works with Android, Windows, Linux, and macOS
Bluetooth Ready – Connect a USB Bluetooth dongle for wireless serial
LiPo Battery Connector – JST connector with adjustable charge current (trimpot)
Field-Upgradeable Firmware – Update via the IOIODude application (no programmer needed)

Ideal For

Android hardware accessories and peripherals
PC-based data acquisition and control
Robotics with Java-based control software
Rapid prototyping of USB-connected hardware

Package Contents

1× IOIO-OTG Development Board (V2.2b)
1× USB Female-A to Micro-A OTG cable

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

ADC: An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
GPIO: General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
LiPo: A LiPo (lithium polymer) battery is a rechargeable lithium battery widely used in portable projects because it is light and compact. LiPo cells need correct charging circuitry and careful handling to stay safe, so equipment that supports LiPo generally includes charging or protection hardware suited to that battery type.
microcontroller: A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
PWM: Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
SPI: A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
UART: UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
USB host: A USB host is the side of a USB connection that controls attached devices, like a computer talking to a keyboard or flash drive. This matters because most microcontroller boards are normally USB devices, so adding USB host support lets them use common USB peripherals.