Project Hub /Renewable Energy Power & Sustainability/Solar Tracking Systems (Single/Dual Axis)/Setting Up Arduino as a slave device

Intermediate

ARDUINO

₹5,000 – ₹15,000

3 – 6 Hours

Complete Kit

Setting Up Arduino as a slave device

This project describes how to configure an Arduino as a slave device controlled by a Raspberry Pi running a Python script with a Tkinter GUI.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

Arduino UNO R3 Board (Compatible) – ATmega328P Microcontroller with USB Cable Rs. 999.00
Raspberry Pi 3 - Model B+ 1.4Ghz 64-bit quad-core Processor with 1 GB Ram (Original) Rs. 9,810.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Cable for Arduino Nano (USB 2.0 A to USB 2.0 Mini B) 30cm Rs. 69.00
10pcs 5mm RED Diffused Light Emitting Diodes - LEDs Set Rs. 39.00
TowerPro SG90 Mini Servo – 180 degree Rotation – Standard Quality Rs. 179.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

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How It Works

In this dual-processor control system, the Raspberry Pi acts as the high-level master controller running a Python script with a Tkinter graphical user interface on Raspberry Pi OS. The user interacts with the GUI on the Pi, which then dispatches commands through a USB serial communication link using connecting wires. On the receiving end, the Arduino Uno R3 operates as a slave device programmed via the Arduino IDE and Nanpy libraries. As the slave node, the Arduino continuously listens for incoming serial instructions from the Raspberry Pi and directly manages real-time input and output operations. Depending on the specific control logic executed, the Arduino triggers connected LEDs or drives optional servo motors to manipulate physical field devices. This architecture cleanly divides responsibilities: the Raspberry Pi handles complex user interface processing and high-level logic, while the Arduino handles deterministic, low-level hardware interactions and peripheral control.

Why Build This

Integrate high-level Python software interfaces on a single-board computer with microcontrollers for robust industrial machinery control interfaces.

Implement distributed home automation systems where a central computing hub coordinates remote sensor monitoring stations and actuators.

Master the architectural pattern of master-slave device communication to extend the I/O capabilities of resource-constrained microcontrollers.

Real-World Application

Home automation systems, remote sensor monitoring stations, and industrial machinery control interfaces combining high-level computing with real-time I/O management.

Skills You'll Learn

Serial communication protocols

GUI development with Tkinter

cross-platform system integration

master-slave hardware architecture

Python and Arduino programming

peripheral actuator control

Safety Precautions

Ensure proper wiring connections and correct power supply voltage levels between the 3.3V Raspberry Pi and 5V Arduino to prevent hardware damage.

Technology Tags

ARDUINO

RASPBERRY PI

PYTHON

TKINTER

NANPY

GUI

SERIAL COMMUNICATION

Frequently Asked Questions

Why do we need both a Raspberry Pi and an Arduino in this project?

The Raspberry Pi provides the processing power for the Python script and Tkinter graphical user interface, while the Arduino excels at real-time I/O management and directly driving physical components like LEDs and servos.

How do the Raspberry Pi and Arduino communicate with each other?

They communicate via a USB cable using serial communication, allowing the Pi to send commands that the Arduino interprets and executes.

What is the role of the Nanpy libraries?

Nanpy allows the Raspberry Pi to control the Arduino remotely using Python, making it straightforward to interact with the Arduino's pins without writing custom firmware from scratch.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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