In a fascinating development, hardware hacker ChromaLock has unveiled a comprehensive build process that transforms the humble TI-84 calculator into a powerhouse, complete with WiFi capabilities—all while staying undetectable and designed to skirt around anti-cheating mechanisms, purely for educational purposes.
The heart of this ingenious mod lies in the selection of the ESP32 C3 microcontroller, due to its compatibility with the TI-84’s existing communication protocols. Notably, TI-84 calculators can already communicate with one another via the built-in 2.5 mm port. The ESP32 is engineered to emulate another TI-84, transforming calculator inputs into signals that are broadcast over WiFi via the ESP32’s built-in antenna. However, this translation process isn’t straightforward and requires a level shifter to adjust the logic to the ESP32’s 3.3 V system.
Surprisingly, the internal structure of the TI-84 offers plenty of room for additional hardware. ChromaLock initially faced challenges wiring all the necessary components manually, prompting the creation of a custom PCB. The design plans for this PCB can be accessed on the project’s GitHub page and make the installation process considerably simpler. Once the hardware is in place, configuring the software and server for the mod’s comprehensive functionality is all that remains.
In terms of appearance, the modified calculator looks entirely stock, with no launcher to arouse suspicion. To access the mod’s features, users must utilize the aforementioned communication protocol. This unlocking process serves a dual purpose: the mod cannot be erased, as it downloads from a pre-configured server on startup and also disables the calculator’s restrictive test mode. After installation, users gain access to four specialized applets aimed at enhancing test-taking efficiency.
The first applet offers direct access to ChatGPT, able to tackle a variety of math problems and provide basic definitions without needing a web search. Second, the chat functionality allows communication, albeit requiring another modded device and a partner. The third applet is an image viewer, perfect for accessing visual resources or as ChromaLock cheekily suggests, glancing at motivational images of your favorite characters. Finally, the apps menu gives users the ability to download and use apps hosted on their configured server.
Project TI-32, melding the TI-84 with the ESP32, stands out as both a highly ambitious and somewhat ethically ambiguous endeavor. While it may provoke debates on morality, the sheer utility and future potential expansions—teased with a forthcoming camera app—highlight just how groundbreaking this project could become.
