Soldered Inputronic-KEYBOARD MicroPython Library


Inputronic Keyboard - 80-Key I2C Keypad Breakout (opens in a new tab)

This board is a complete 80-key keypad breakout (8x10 tactile-switch matrix) built around Texas Instruments' TCA8418 I2C keyboard scanner. Rather than consuming 18 GPIO pins on a microcontroller, the chip handles scanning and debouncing independently and reports key press/release events over I2C (address 0x34) via a 10-event FIFO buffer. Two Qwiic connectors provide solder-free wiring. This library abstracts the raw FIFO scanning into key press/release events, upper/lower keymaps with SHIFT support, and convenience helpers for polling, blocking string input, and "type mode" callbacks. Part of the Qwiic ecosystem (opens in a new tab).

How to install

After installing the mpremote package (opens in a new tab), install the library on your board using the following command:

  mpremote mip install github:SolderedElectronics/Soldered-Inputronic-KEYBOARD-MicroPython-Library

Or, if you're running a Windows OS:

  python -m mpremote mip install github:SolderedElectronics/Soldered-Inputronic-KEYBOARD-MicroPython-Library

Repository Contents

InputronicKeyboard.py - MicroPython driver class
InputronicKeymap.py - upper/lower keymap tables
InputronicShiftmap.py - SHIFT-key character mapping
package.json - mip install manifest
/Examples - polling, serial-type, and OLED-type examples

Hardware design

You can find hardware design for this board in the Inputronic Keyboard hardware repository.

Documentation

Access library documentation here (opens in a new tab).

About Soldered

At Soldered, we design and manufacture a wide selection of electronic products to help you turn your ideas into acts and bring you one step closer to your final project. Our products are intented for makers and crafted in-house by our experienced team in Osijek, Croatia. We believe that sharing is a crucial element for improvement and innovation, and we work hard to stay connected with all our makers regardless of their skill or experience level. Therefore, all our products are open-source. Finally, we always have your back. If you face any problem concerning either your shopping experience or your electronics project, our team will help you deal with it, offering efficient customer service and cost-free technical support anytime. Some of those might be useful for you:

Open-source license

Soldered invests vast amounts of time into hardware & software for these products, which are all open-source. Please support future development by buying one of our products.

Check license details in the LICENSE file. Long story short, use these open-source files for any purpose you want to, as long as you apply the same open-source licence to it and disclose the original source. No warranty - all designs in this repository are distributed in the hope that they will be useful, but without any warranty. They are provided "AS IS", therefore without warranty of any kind, either expressed or implied. The entire quality and performance of what you do with the contents of this repository are your responsibility. In no event, Soldered (TAVU) will be liable for your damages, losses, including any general, special, incidental or consequential damage arising out of the use or inability to use the contents of this repository.

Have fun!

And thank you from your fellow makers at Soldered Electronics.