  ⚠️
  PayPal is temporarily unavailable. Please use Card / Stripe to complete your order. PayPal will be back within a few business days.
  

Specs Process Features Showcase Terminal Shop

Hardware Project — 2024

AI-84

"Bridging 1990s Hardware with 21st Century Intelligence."

STATUS: ONLINE

👁 — people viewing this page

The AI-84 is a hardware-level modification that integrates a Seeed Studio XIAO ESP32S3 Sense microcontroller into a TI-84 Plus. By connecting to the calculator's link port and injecting custom firmware, the device sends queries to OpenAI's GPT-5.4 API over Wi-Fi — and uses the ESP32S3's onboard camera for GPT-5.4 Vision, allowing the AI to literally see the calculator's screen.

GPT-5.4 Online

Wi-Fi Active

Camera Ready

1.1s latency

hover to flip

Technical Specifications

Under the Hood

⚡

Microcontroller

Seeed Studio XIAO ESP32S3 Sense

Dual-core Xtensa LX7 · Integrated Wi-Fi 802.11 b/g/n · Onboard OV3660 Camera Module

🧠

AI Model

GPT-5.4 + Vision

OpenAI REST API via HTTPS · JSON-buffered responses

🔌

Link Port Protocol

Hyper-Link Protocol Engine

TI-84 Plus 2.5mm port · Tip/Ring/Sleeve pinout · BASIC program injection

⚙️

Firmware

Custom C++ / Arduino IDE

JSON parsing · Stream rendering · Link port handshake protocol

📡

Logic Interfacing

3.3V Native Logic

ESP32S3 3.3V compatible with TI-84 Plus logic gates · No external level shifting required

🔋

Power

AAA Battery Rail Tap

Powered via USB-C passthrough or existing AAA battery rail · Zero external wires

Development Process

How It Was Built

Phase I

The Teardown

Reverse engineering the TI-84 Plus motherboard to identify and map the link port pinout. Documented the tip/ring/sleeve signal lines and validated voltage levels for compatibility with the ESP32S3's 3.3V GPIO.

Phase II

Hardware Integration

Precision soldering of the XIAO ESP32S3 Sense module for a flush, internal fit within the original TI-84 casing. Camera module positioned to capture screen output. Zero external wires — fully invisible integration.

Phase III

Firmware & Link Protocol

Building the Hyper-Link Protocol Engine from scratch in Arduino C++, implementing the TI serial protocol, and developing the BASIC program injection pipeline to push AI-generated code directly onto the calculator.

Phase IV

API Bridge & Optimization

Implementing HTTPS REST calls to GPT-5.4, optimizing JSON parsing for embedded constraints, and building stream-based text rendering for near real-time LCD responses on the calculator's screen.

Phase V

Vision Pipeline

Integrating the onboard OV3660 camera with the GPT-5.4 Vision API, enabling the AI to capture and interpret the calculator's current screen state — making queries context-aware without manual input.

Key Features

What It Can Do

🔲

Invisible Integration

The ESP32S3 is housed entirely within the original TI-84 casing. No external wires, no visible modifications — it looks exactly like a stock calculator.

📡

Wi-Fi Enabled

Connects to any WPA2 hotspot for on-the-go GPT-5.4 queries. Works with mobile hotspots — no dedicated network required.

👁️

Vision Capable

The onboard camera captures the calculator's screen and feeds it directly to GPT-5.4 Vision — the AI can see exactly what problem you're working on.

⚡

Low Latency

Optimized embedded JSON parser and stream rendering pipeline deliver near-instant responses direct to the TI-84's LCD display.

💾

BASIC Injection

AI-generated TI-BASIC programs are transferred directly onto the calculator over the link port — no cables, no computer required.

🔋

Battery Integrated

Taps the existing AAA battery rail internally. No additional batteries, no charging port — completely self-contained.

Scroll Showcase

The calculator stays with you.

As you move through the section, the AI-84 remains pinned on-screen while the hardware and software details appear beside it.

Mode 01

AI Chat on the TI-84

Ask from the calculator, send through the Wi-Fi bridge, and receive a readable answer back on the LCD without switching devices.

GPT-5.41.1s latency

Mode 03

Programs transfer directly

AI-generated TI-BASIC can be pushed through the link port, turning answers, notes, and mini tools into calculator-native programs.

Link portNo computer

AI Chat

scroll to inspect

Mode 02

Vision sees the work

The Vision Pro build captures equations, calculator screens, notes, and diagrams so the AI can respond with the missing visual context.

OV3660GPT Vision

Mode 04

Hidden inside the shell

The ESP32S3, firmware, power tap, and link-port interface are built into the TI-84 body so the calculator still looks clean and familiar.

ESP32S3Internal fit

Feature Deep Dive

Everything your calculator never had

A hardware modification that adds real AI, note storage, a math solver, and more — invisibly — to your TI-84.

ai84 — gpt-5.4 — active

▶ Wi-Fi: CONNECTED

▶ GPT-5.4: READY

// TI-84 link port: query received

Q: integrate x² dx

A: x³/3 + C

latency: 1.1s · tokens: 24

Awaiting next query

ai84 — math-solver — step-by-step

// Step-by-step solver

Q: 3x² + 5x − 2 = 0

① Identify: a=3, b=5, c=−2

② Discriminant: 25+24 = 49

③ x = (−5 ± 7) / 6

✓ x = ⅓ or x = −2

ai84 — notes — 3 saved

// Stored notes · BASIC inject

[1] Chem formulas - ch7

[2] Physics: F=ma, E=mc²

[3] History essay outline

▶ Load note [2] → injecting...

Transferred to TI-84

ai84 — games — BASIC inject

// AI-generated game injection

▶ Prompt: "snake game TI-84"

✓ Generated 47-line BASIC

✓ Syntax checked

▶ Injecting over link port

Transferring

Live Demo

See it in action

Full walkthrough videos of the AI-84 — AI chat over the link port and the on-board camera capturing the screen — are on the way. We're finishing the final cuts now.

Coming Soon

Comparison

How AI-84 stacks up

Stock TI-84 Plus

Standard graphing calculator

GPT-5.4 AI ✗

Wi-Fi ✗

Camera / Vision ✗

Step-by-step solver ✗

BASIC injection ✗

AI note generation ✗

Invisible integration —

Looks stock ✓

AI-84
Hand-built · Queens, NY
Recommended
GPT-5.4 AI              ✓
Wi-Fi                   ✓
Camera / Vision         Vision Pro
Step-by-step solver     ✓
BASIC injection         ✓
AI note generation      ✓
Invisible integration   ✓
Looks stock             ✓

Other Mods

Typical calculator AI mods

GPT-5.4 AI ✗

Wi-Fi ✓

Camera / Vision ✗

Step-by-step solver —

BASIC injection ✗

AI note generation ✗

Invisible integration ✗

Looks stock —

System Terminal

Live Interface

ai84-firmware — live GPT-5.4 demo — 80×24

// AI-84 System Interface v1.0 // Type 'help' for available commands

ai84@esp32s3:~$

Shop

Get Your AI-84

⚠ ONLY 5 UNITS IN STOCK — order soon

Hand-built hardware units. Click any product to learn more and order.

Hardware Units

Hover to flip

AI-84 Standard

GPT-5.4 integrated. Wi-Fi enabled. Invisible mod.

$129

worldwide shipping

ESP32S3 GPT-5.4 Wi-Fi BASIC Inject

Limited Stock

AI-84 Vision Pro 3MP

Everything in Standard + GPT-5.4 Vision camera system.

$179

worldwide shipping

ESP32S3 Sense GPT-5.4 Vision OV3660 Cam BASIC Inject

New

AI-84 Vision Pro 5MP

Premium 5MP OV5640 + Autofocus. Sharper. Faster. Clearer.

$225

worldwide shipping

ESP32-S3 GPT-5.4 Vision 5MP OV5640 Autofocus BASIC Inject

DIY Build

Want to build your own AI-84? Join the Discord and we'll walk you through it.

Join Discord

📍 NYC Pickup — No Shipping Fee

Live in NYC? Pick it up in person.

Skip shipping and pick up your AI-84 directly. Available for New York City residents only — pickup location shared by email after order confirmation.

Choose Product

First Name

Last Name

Country

State

Join Discord

Shipping Address for Mail-In Mods

If you chose "Modify Mine", send your compatible TI-84 to the intake address below after checkout:

AI-84 Modifications Lab 9840 57 Ave APT 7C Corona, Queens, NY 11368

Put a small note inside the package with your order number, name, and return email so we can match the calculator to your build.

Use a padded mailer or small box with enough cushioning. Inbound transit damage is the sender's responsibility.

Keep your tracking number until AI-84 sends confirmation that your device has been received and checked in.

Build time normally runs 5-7 business days after intake. Standard return shipping back to you is included.

1. Build Scope

AI-84 offers finished calculator builds and mail-in modification work for compatible Texas Instruments TI-84 Plus / Silver Edition hardware. New-unit orders include the calculator itself. "Modify Mine" orders are service-only and require you to supply the device.

2. Ownership & Software Access

The physical calculator remains yours. Each eligible purchase includes one year of AI-84 software access, including supported Wi-Fi features, AI functionality, and OTA firmware updates. Continued cloud/software access after the first year may require a paid plan.

3. Warranty, Risk & Independence

Hardware modification can void manufacturer warranties. AI-84 is independent and is not affiliated with Texas Instruments or OpenAI. Customers are responsible for following school, testing, workplace, and local rules; AI-84 is not responsible for penalties connected to misuse.

4. Refunds, Cancellations & Shipping

Refund and cancellation requests are reviewed individually. Once a mail-in modification has started or parts have been installed, that service is no longer refundable. Customers pay shipping to AI-84; AI-84 covers standard return shipping after the work is complete.

5. Software Protection & Use Rules

Do not reverse-engineer, clone, resell, redistribute, bypass, or tamper with AI-84 firmware, subscriptions, authentication, or security systems. Using an AI-84 device where calculators, wireless tools, or AI assistance are restricted is entirely at the customer's own risk.

Build Log

Changelog

v1.3

OTA update support + config portal overhaul

Firmware can now update over-the-air via Wi-Fi. Config portal rewritten for faster credential entry. Link port timing improved.

Mar 2025

v1.2

GPT-5.4 Vision integration shipped

Camera pipeline integrated with OV3660. JPEG streaming to GPT-5.4 Vision endpoint working. ESP32S3 Sense variant now supported.

Jan 2025

v1.1

BASIC token injection fix + JSON parser rewrite

Fixed critical bug where BASIC tokens were being sent raw instead of compiled. JSON response parser rewritten to handle chunked streams.

Dec 2024

v1.0

Initial release — AI-84 goes live

First working prototype. GPT-5.4 responses over Wi-Fi via link port. XIAO ESP32C3 variant. Site launched at ai84calc.com.

Nov 2024

Your questions answered

Standard shipping takes 5–7 business days after your order is built and processed. Each unit is hand-built to order so please allow 1–2 days for assembly before shipping. You'll receive a tracking email once your order ships.

We accept all major credit and debit cards via Stripe, as well as PayPal and Venmo. All payments are processed securely — we never store your card information.

You have up to 1 hour after placing your order to request a change or cancellation, and only for a valid reason. After that window your order enters the build queue and cannot be modified. To request a cancellation contact us immediately through our Discord server.

Yes we do! For international orders please open a ticket in our Discord server and our team will assist you with shipping options and rates to your country.

The AI-84 connects via WPA2 Wi-Fi — any hotspot works, including your phone's mobile hotspot. You configure your network credentials once through the companion app (AI84Base). After that, the ESP32 handles everything automatically. You interact entirely through your calculator's buttons and screen, no phone needed during use.

No — that's one of the core design goals. The ESP32 module is housed entirely inside the original TI-84 casing with no external wires or visible modifications. The Standard model is completely invisible. The Vision Pro has a small camera module in the top-right corner, which is the only visible difference.

The AI-84 currently supports the TI-84 Plus (original model). The firmware and link port protocol are specifically designed for its 2.5mm serial port. Support for additional TI calculator models may be explored in the future.

Yes — every unit ships with a 30-day warranty. If your unit has a hardware defect or is damaged during transit, contact us and we'll make it right. For issues outside the warranty window, open a ticket in our Discord and we'll do our best to help.

Can't find what you're looking for? Contact our customer support team →

Ready to upgrade your calculator?

Ace your exam
with AI-84

Join students already using the AI-84 to study smarter. Hand-built in Queens, NY — ships fast.

Get Your AI-84 → ? Read the FAQ

🎓

⚡

🔬

Hand-built · GPT-5.4 · Ships from Queens, NY · 30-day warranty

Add-ons

Shipping

Payment

Confirm

Step 1 — Customize Your Order

Your Order

Add extras to your order below.

🛡 Warranty Protection

Covers loss, theft, or confiscation — $50 deductible.

🔋 Extra Batteries

4x AAA batteries for extended use.

⚡ AI Priority Access

Skip the queue during high traffic periods.

Order Summary

—

Base price—

Total—

Discount Code

Step 2 — Billing & Shipping

Where should we ship?

Enter your shipping information below.

First Name *

Last Name *

Phone Number *

Email Address *

Address Line 1 *

Address Line 2

Country *

City *

State *

ZIP / Postal Code *

Shipping Method

Standard Shipping

5–7 business days

$17.95

Priority Shipping

2–3 business days

$20.00

Return shipping is included for Modify Mine orders. Pick the return speed you prefer; the checkout total will not change.

⚠ Please fill in all required fields.

Order Summary

—

Base price—

Shipping$17.95

Total—

Step 3 — Payment

How would you like to pay?

Review your order and choose a payment method.

PayPal charges the full order total shown above, including any add-ons and applicable discounts.

🔒 Stripe · PayPal · 256-bit SSL · Hand-built in Queens, NY · 30-day warranty

Order Summary

—

Base price—

Shipping—

Total—

✅

Order Confirmed!

A confirmation email has been sent to you.

Order —

AI-84

Under the Hood

How It Was Built

What It Can Do

The calculator stays with you.

Everything your calculator never had

See it in action

How AI-84 stacks up

Live Interface

Get Your AI-84

Live in NYC? Pick it up in person.

Pickup is NYC Only

Changelog

Your questions answered

Ace your examwith AI-84

You're on the list.

Ace your exam
with AI-84