Building an Arduino‑Powered Robot with Raspberry Pi: A Step‑by‑Step Guide

This guide presents a practical workflow for integrating an Arduino with a Raspberry Pi to build a robotic platform. It covers everything from initial setup with Berryboot to configuring SSH, VNC, Git, and I2C communication.

Step 1: Install Berryboot

Download the latest Berryboot installer. Berryboot lets you flash multiple Raspberry Pi operating systems onto a single SD card.

Step 2: Prepare the SD Card

Extract the Berryboot zip file onto a blank SD card using your computer’s built‑in SD utility or a tool such as SD Card Formatter.

Step 3: Boot Raspberry Pi with Berryboot

Insert the prepared SD card into your Pi and power it on. The first boot will launch Berryboot’s menu, allowing you to choose an OS image (e.g., Raspbian Wheezy).

Step 4: Configure a Wi‑Fi Dongle

Berryboot can automatically detect and configure a compatible Wi‑Fi dongle during its first boot. If the dongle doesn’t appear, manually set it up following the official Raspberry Pi Wi‑Fi guide. A budget-friendly, low‑power option is the $6.17 USB dongle that delivers solid range while drawing minimal current.

Step 5: Set Up SSH Access

Install PuTTY on your desktop. Find your Pi’s IP address from your router’s client list, then connect using PuTTY:

ssh pi@IP_ADDRESS

Use the default credentials pi / raspberry. Once logged in, you’ll have terminal access to your Pi.

Step 6: Enable VNC for Remote Desktop

On the Pi, install VNC Server:

sudo apt-get update && sudo apt-get install realvnc-vnc-server

Start the server with:

sudo vncserver :1 -geometry 1024x768 -depth 24

On your desktop, install a VNC client (e.g., RealVNC Viewer) and connect to IP_ADDRESS:1 using the same credentials.

Step 7: Expand the SD Card Filesystem

Berryboot typically expands the filesystem automatically. If you’re using a different image, run:

sudo raspi-config --expand-rootfs

Then reboot.

Step 8: Install Git

Git is essential for fetching libraries and firmware:

sudo apt-get install git

Clone Adafruit’s Raspberry Pi Python libraries as an example:

git clone https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code.git

Step 9: Install SMBus for I²C Communication

To bridge the Pi and Arduino over I²C, install SMBus:

sudo apt-get install python-smbus

Ensure the I²C kernel module is enabled in raspi-config under “Interfacing Options.”

Step 10: Verify Setup

With the Pi and Arduino connected via I²C, test a simple Python script that reads sensor data from the Arduino. Confirm that the VNC session remains stable and that the SSH connection works from any machine on the network.