apitor-ble

A small, dependency-light Python library for driving Apitor toy robots over Bluetooth Low Energy — hardware tested using Robot J — plus a test/demo CLI and full protocol documentation.

The protocol was reverse-engineered from the official Apitor Kit Android app. See docs/PROTOCOL.md for the byte-level details.

⚠️ Unofficial. Not affiliated with or endorsed by Apitor. For use with hardware you own, for interoperability and educational purposes.

Why?

Apitor doesn't publish a public Bluetooth protocol for its robots, so there's no official way to control them from your own code. This library fills that gap: the protocol was independently reverse-engineered from the official app purely for interoperability — so people can experiment, learn, teach, and build their own robotics projects with hardware they already own.

Features

• Async API built on bleak (Windows/macOS/Linux).
• Scan + name-filter for Apitor devices, connect, and perform the required authorization handshake automatically.
• Motor control, LED control, raw frame access, and notification callbacks.
• Pure, hardware-free protocol layer (apitor_ble.protocol) with unit tests.

Demo

See a real robot driven straight from Python — no app required.

Install

pip install apitor-ble

From source

pip install -e .

Requirements

• Python 3.10+
• A Bluetooth Low Energy adapter
• Supported on Windows, macOS, and Linux (via bleak)

New to programming? Start here 🤖

There's a beginner-friendly API — no async, no Bluetooth setup, just plain commands. See docs/EASY.md.

from apitor_ble.easy import Robot

robot = Robot()            # Robot J by default; Robot(product="s") for others
robot.connect()

robot.forward(2)       # drive forward for 2 seconds
robot.color("blue")    # make the lights blue
robot.wait(1)
robot.lights_off()

robot.disconnect()

Works with every Apitor BLE kit (Robot J, S, Q, R, X, and Wheels). Driving directions can be calibrated per build in a few lines — see Setting up a different robot. For the official motor tables of every buildable model, see docs/ROBOTS.md.

Teaching with this? There's a classroom quickstart with lesson ideas and tips in docs/TEACHERS.md.

Use it in your project

import asyncio
from apitor_ble import ApitorRobot, Motor, Direction, Color

async def main():
    robot = await ApitorRobot.discover(product="j")
    async with robot:
        await robot.run_motor(Motor.M1, Direction.D1, speed=8)
        await asyncio.sleep(2)
        await robot.stop_all_motors()
        await robot.all_leds(Color.BLUE)

asyncio.run(main())

A fuller example is in examples/use_in_another_project.py.

Try it from the command line

Installing the package provides an apitor command:

apitor scan        # find nearby Robot J devices
apitor demo        # connect and run a motor + LED routine
apitor listen      # print incoming notification frames
apitor drive       # keyboard-driven live control

apitor demo --address AA:BB:CC:DD:EE:FF   # skip scanning
apitor scan --product s                   # a different Apitor product
apitor demo --verbose                     # log raw TX/RX frames

(The older python main.py <command> invocation still works too.)

How it fits together

Each layer talks only to the one below it, so you can plug in at whatever level you need:

Your code
│
├── easy.py        Beginner synchronous API  (uses profiles.py)
│
├── robot.py       Async BLE driver          (decodes via sensor.py)
│
├── protocol.py    Packet encoding
│
├── bleak          Bluetooth library
│
├── Bluetooth LE   Your computer's radio
│
└── Apitor Robot   Robot J / S / Q / R / X / Wheels

Beginners start at easy.py. Advanced users can drop straight to robot.py for the full async API, or to protocol.py to build frames by hand.

Project layout

apitor-ble/
├── apitor_ble/
│   ├── __init__.py        # public API
│   ├── protocol.py        # pure byte-level protocol (no I/O)
│   ├── sensor.py          # notification / telemetry decoding
│   ├── robot.py           # async BLE driver (bleak)
│   ├── profiles.py        # per-robot driving profiles
│   └── easy.py            # beginner-friendly synchronous API
├── main.py                # test / demo CLI
├── examples/
│   ├── use_in_another_project.py
│   └── first_program.py
├── tests/
│   ├── test_protocol.py   # hardware-free frame tests
│   ├── test_sensor.py     # notification decoding tests
│   ├── test_easy.py       # easy-API helper tests
│   └── test_profiles.py   # driving-profile tests
├── docs/
│   ├── PROTOCOL.md        # reverse-engineered protocol reference
│   ├── USAGE.md           # library + CLI usage guide
│   ├── EASY.md            # beginner guide + calibration steps
│   ├── ROBOTS.md          # official motor tables per model
│   └── TEACHERS.md        # classroom quickstart
├── CHANGELOG.md
├── CONTRIBUTING.md
├── LICENSE
├── pyproject.toml
└── requirements.txt

Tests

The protocol layer needs no hardware or bleak:

pip install pytest
pytest

Robot J at a glance

Roadmap

Planned future improvements:

• Publish to PyPI
• Add GitHub Actions CI
• Add coverage reporting
• Support additional Apitor firmware revisions
• More example programs
• Additional classroom resources

Changelog

See CHANGELOG.md for release notes.

Contributing

Contributions are welcome — see CONTRIBUTING.md. Especially valuable:

• Testing on additional robots (and calibrating them on real hardware)
• Protocol verification
• Documentation improvements
• New example programs
• Bug reports

Disclaimer

This project was independently reverse-engineered for interoperability.

It is not affiliated with, endorsed by, or supported by Apitor.

All trademarks belong to their respective owners.

License

MIT — see LICENSE.