spiberry-engine 0.1.0

Control LEGO SPIKE with a Raspberry Pi and mpremote

SpiBerryEngine

A project that aims to primarily control LEGO SPIKE with a Raspberry Pi. It uses the mpremote tool to communicate with the LEGO SPIKE hub.

See this Youtube video for an introduction and demonstration of the project.

Installation

Recommended: Installing via PyPI

The simplest way to install SpiBerryEngine is from PyPI:

pip install spiberry-engine

For vision support (OpenCV/Ultralytics) and camera features:

pip install "spiberry-engine[full]"

Other extras:

• spiberry-engine[vision] - Vision features (OpenCV/Ultralytics)
• spiberry-engine[camera] - Camera capture features
• spiberry-engine[controller] - Remote drive controller features

After installation, initialize your environment (creates config and default robot code):

spiberry init

Alternative: Using the Engine Standalone

Transfer the spiberry.pyz file to your Raspberry Pi and run it:

python spiberry.pyz

It will create a virtual environment and install dependencies. Service installation is explicit via the --install-service flag.

Install and optionally start the service from the installer flow:

sudo python spiberry.pyz --install-service --start-service

Hardware Setup

Connect the following components to your Raspberry Pi:

• Starter Pin: Must be connected to ground (GPIO 21 by default) to start the program. You can bypass this by setting the environment variable IGNORE_STARTER_PIN=1.
• RGB LED: Connect to the GPIO pins specified during initialization or defaults:
  • Red: GPIO 0
  • Green: GPIO 11
  • Blue: GPIO 9
• Button: Connect to GPIO pin specified (default: 17)

Usage

CLI Commands

When installed via PyPI, several commands are available:

Command	Description
spiberry init	Initialize default config and robot code
spiberry run-engine	Run the main engine
spiberry-start	Start the systemd service
spiberry-stop	Stop the systemd service
spiberry-status	Check service status
spiberry-remote-drive	Start remote drive controller

Running the Engine

To run the engine manually with the default configuration:

spiberry run-engine

You can also specify a custom robot code file:

spiberry run-engine my_cool_robot.py

Configuration File

SpiBerryEngine stores runtime settings in:

~/spiberry_config.ini

On first run or with the spiberry init command, this file is created automatically with defaults similar to:

[GPIO]
red = 0
green = 11
blue = 9
button = 17
active_high = False

[Code]
path = robot_code.py
raspi_functions_path = raspi_functions/

[Vision]
enabled = False

[Camera]
take_picture_method = picamera2
timeout = 0
width = 1920
height = 1080

[RemoteDrive]
left_motor = port.A
right_motor = port.B

Notes:

• Code.path controls which robot code file is executed.
• Code.raspi_functions_path can point to either:
  • a Python file (for example raspi_functions.py), or
  • a package directory (for example raspi_functions/, using __init__.py).
• Vision features are only loaded when Vision.enabled = True.
• RemoteDrive.left_motor and RemoteDrive.right_motor set default motor ports for remote drive mode.

CLI GPIO pin arguments are now persisted into the config file when provided:

# Example if running standalone
python spiberry.pyz --red 0 --green 11 --blue 9 --button 17

The values are then saved under [GPIO].

Deployment & Extension

Note: See the VS Code Extension for easier installation and code deployment. The extension provides a user-friendly interface, and is recommended.

Deploying Code

Recommended method: Use the VS Code Extension

Use deploy_robot_code.py to deploy your robot code:

1. Run the deploy tool on your computer
2. Select your .llsp3 file (LEGO SPIKE project export)
3. Optionally select a Raspi Functions file (see below)
4. Enter your Raspberry Pi connection details
5. Click "Deploy" or use the hotkey Ctrl+Shift+D

The deployer will:

• Extract your code from the .llsp3 file
• Send robot_code.py to your Raspberry Pi
• Optionally send raspi_functions.py if provided
• Save your configuration for future deployments

Using Raspi Utility Classes

Copy the contents of raspi-util-class.py and paste it at the top of your robot code. This provides easy-to-use classes for interacting with Raspberry Pi hardware from your LEGO SPIKE code.

Example Usage

# Copy raspi-util-class.py contents here at the top of your code

# Create Raspi instance
raspi = Raspi()

# Register devices
servo = raspi.register_device("servo", "s1", "14","0","180","0.00095","0.0028","10")
# Parameters are: type, name, pin, min_angle, max_angle, min_pulse, max_pulse, start_angle
distance_sensor = raspi.register_device("distance_sensor", "my_sensor", "15", "16", "4")
# Parameters are: type, name, trigger_pin, echo_pin, max_distance_m

# Use devices
servo.set_angle(90)
current_angle = servo.get_angle()
distance = distance_sensor.get_distance()

# Call custom functions (if you have raspi_functions.py)
result = raspi.my_custom_function() # Preferred way to call custom functions
result = raspi.func("some_custom_function()") # Deprecated, may be removed in future versions

The utility classes support:

• Servo: set_angle(angle), get_angle()
• Distance Sensor: get_distance()
• Custom Functions: raspi.my_custom_function() to call functions from your raspi_functions.py

RGBLED Signals

The RGB LED provides visual feedback for the system state:

Color	Meaning
Red	Connection error or module not found
Green	Ready/Idle/Success
Blue	Run Error
Yellow	Work starting
Cyan	Code or functions reloaded

Blinking Patterns

Color	Blink Count	Blink Duration	Meaning
Red	2	0.2s	raspi_functions import error
Red	2	0.2s	Stopped code execution
Red	5	0.1s	mpremote not found
Red	5	0.3s	Connection error
Blue	2	0.1s	REPL error
Blue	2	0.3s	Function call function not found error
Blue	5	0.1s	Code execution error
Green	2	0.2s	Code started/stopped/ended
Cyan	2	0.2s	Code reloaded
Cyan	3	0.2s	Functions reloaded
Cyan	5	0.2s	Functions & Code reloaded

Camera Configuration

SpiBerryEngine supports two camera capture methods: picamera2 (recommended for Raspberry Pi OS) and rpicam-still (command-line tool). Both methods support comprehensive configuration options.

Configuration Options Reference

See examples/camera_config_examples.py for comprehensive examples and the picamera2 manual and rpicam-still documentation for complete option lists.

Vision Processing

SpiBerryEngine includes a Vision and ContourDetector classes that provides some image processing capabilities using OpenCV and object detection using Ultralytics. You can use the take_picture() method to capture an image and then apply various processing methods like detect_objects(), find_contours(), or custom OpenCV operations.
See examples/vision_examples.py for usage examples.

Files Overview

• main.py - Main engine script
• vision.py - Vision processing classes (Vision, ContourDetector)
• camera.py - Camera capture classes
• remote_drive/ - Remote drive control module (client and controller)
• installer.py - (deprecated) Installation script with GUI
• deploy_robot_code.py - (deprecated) Code deployment tool with GUI
• sbe.service - Systemd service configuration
• requirements.txt - Python dependencies
• scripts/ - Helper scripts for service management

Connections and Hardware

• Raspberry Pi GPIO pins for RGB LED and Button
• LEGO SPIKE Hub connected via USB to Raspberry Pi
• Raspberry Pi running Raspberry Pi OS with Python 3

Troubleshooting

• Check the RGB LED signals for error codes
• Ensure all dependencies are installed
• Ensure there is no syntax error in your robot code (Spike App does not always show them)
• Check your installation and code deployment paths

Disclaimer

This project is an independent community project and is not affiliated with, endorsed by, or sponsored by LEGO Group or Raspberry Pi Ltd. Use at your own risk. Always follow safety guidelines when working with hardware.