humancomputerintegration / LipIO

LipIO is a hardware device that allows for the lips to act a touch-input and touch-output device.

LipIO: Enabling Lips as both Input and Output Surface

This repository includes code and design files for the paper "LipIO: Enabling Lips as both Input and Output Surface" (ACM CHI2023).

Summary: LipIO is an open-source device that allows you to control external applications. Its hardware is built on top of an SAMD21 microcontroller (we used the Seeeduino XIAO, but you can use your favorite microcontroller), a capacitive touch sensor (we used the MPR121, but others are possible, even the built-in touch input from the SAMD21) and a electrical stimulator (we used the medical-grade Rehastim, but you can use others, such as the open-source OpenEMSstim). Its firmware is built using Arduino, while its software depends on what you are trying to control, here you have freedom to use it as you like and plug the data from LipIO into your own applications, we processing (P5) to create a simple vizualizer that allows you to see the data from LipIO and how to interface with any application.

Source Code

We share software code to sense the tongue capacitive touch, calculate the centroid, stimulate a single channel, and visualize the capacitive sensing values.

• firmware: code/Arduino/scripts/LipIO_firmware
  • Add Seeed SAMD Boards to Arduino IDE from Boards Manager.
  • Upload LipIO_firmware.ino to Seeeduino xiao.
  • Refer to this link about the wiring of MPR121 (capacitive touch sensor).
  • Arduino IDE 1.8.19
• visualizer: code/Processing/scripts/LipIO_visualize
  • Before running Processing, upload the firmware to Seeeduino XIAO.
  • Change the portName constant to your correct port.
  • Type 0-4 to stimulate each electrode.
  • Processing 4.0b2

Flexible electrodes for LipIO

The design directory includes the path design of the LipIO device in Adobe Illustrator and pdf format. You can print the device with conductive ink or a craft cutter.

Schematics

Stimulator

Our software was tested with a medical-grade electrical stimulator, Rehastim. If you have Rehastim and want to learn more about how to control its stimulation output from your laptop (Unity, python), you should check the project page of our open-source library. While we used the medical-grade Rehastim, you can use others, such as the open-source OpenEMSstim, which we contributed too as well).

Citing

When using or building upon this device in an academic publication, please consider citing as follows:

Arata Jingu, Yudai Tanaka, and Pedro Lopes. 2023. LipIO: Enabling Lips as both Input and Output Surface. In Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems (CHI ’23), April 23–28, 2023, Hamburg, Germany. ACM, New York, NY, USA. https://doi.org/10.1145/3544548.3580775

contact

For any questions about this repository, please contact [e-mail]