Getting two Arduino boards to talk to each other opens up projects that a single board can't handle on its own. You might have one board reading sensors in one corner of a room and another driving a display somewhere else, and the two need to share what they know. Serial communication is one of the simplest ways to make that happen, and it works with almost any Arduino model you have lying around. This article walks through connecting two Arduino Nano boards and passing data back and forth over their serial ports.
What is Arduino?
Arduino is an open-source electronics platform that consists of both hardware and software components. It is designed for hobbyists, students, and professionals to create interactive and programmable electronic projects. The hardware typically includes a microcontroller board with various input and output pins, allowing users to connect sensors, actuators, and other electronic components.
Need a hand with your project?Arduino Boards
Arduino interprets the input it receives from a multitude of sensors to impact its environment, exerting control over lights, motors, and various actuators. Arduino's open-source nature and user-friendly design make it a widely adopted choice for a range of applications, from simple LED projects to more complex endeavors like robotics and IoT devices.
Arduino Nano
A compact board with ATmega328P, ideal for small projects. Features USB connectivity, digital, and analog pins. Versatile for space-constrained applications.
Arduino Uno
Features ATmega328P, USB connectivity, and a balanced set of digital and analog pins. Great for various electronic projects, especially for beginners.
Arduino Mega
Powerful board with ATmega2560, offering numerous digital and analog pins. Suited for complex projects demanding extensive input/output capabilities.
Arduino Zero
Featuring the ARM Cortex-M0+ processor, the Arduino Zero excels in tasks requiring precise control and processing power, making it ideal for space-constrained applications.
Arduino Due
The most powerful Arduino board, built around an ARM Cortex-M3 processor. With extensive input/output options and 32-bit performance, it is well suited for demanding and large-scale projects.
Arduino Modules
Discover a range of Arduino modules perfect for enhancing your electronic projects. Our curated selection includes sensors, actuators, and communication modules designed to integrate smoothly with Arduino boards.
Arduino projects
Explore our exciting collection of Arduino projects, designed to spark your creativity and passion for electronics. From beginner tutorials to advanced projects, discover options suitable for all skill levels. Immerse yourself in hands-on experimentation and turn your ideas into reality.
Get your Arduino Starter KIT
Begin your Arduino journey with this Starter Kit, crafted for all experience levels. The kit equips you with essential materials, and our blog provides straightforward tutorials and circuit guides. Whether you're new or have some experience, confidently engage in Arduino projects and unleash your creativity.
- 🖐️ Master coding effortlessly with our Arduino board
- 🚀 Unleash creativity with dynamic components
- 🛠️ Plug-and-Play for easy experimentation
- 🤝 Thrive in a supportive maker community
- 💼 Enhance coding and problem-solving skills
- 🌍 Innovate anywhere with a portable design
- ✨ Impress with captivating projects, from LEDs to IoT
Arduino IDE
Arduino boards are programmed through the Arduino Integrated Development Environment (IDE), which simplifies coding with a user-friendly interface based on the Wiring language. This makes it accessible for beginners. Arduino boards are suitable for a wide range of applications, from simple projects like LED blinking to more advanced tasks such as robotics, home automation, and Internet of Things (IoT) devices.
Arduino IDE
The core development environment for writing, compiling, and uploading code to Arduino boards. It features a built-in code editor with syntax highlighting, a library manager for extending functionality, and a board manager for configuring different hardware targets, simplifying the development workflow
Arduino Monitor
A crucial tool for debugging and communication, the Serial Monitor allows users to interact with their Arduino projects in real-time. It displays data sent from the Arduino, facilitating debugging and providing insights into sensor readings, variable values, and program flow.
Arduino Plotter
Visual representation tool, perfect for graphing data received through the serial port. This feature helps users analyze sensor readings, visualize variable trends, and debug projects by providing a graphical representation of numeric data over time, aiding in the interpretation of complex datasets.
Recent Arduino guides
Explore our selection of articles on electronics and Arduino. Check out the latest additions below for valuable insights and information.
Getting started with the HC-05 Bluetooth module
The HC-05 is one of the most popular Bluetooth modules in the Arduino ecosystem, and for good reason. It's affordable, well documented, and flexible enough to handle a wide range of use cases. It can operate as both a master and a slave device, meaning it can initiate connections to other Bluetooth devices as well as wait for them. For projects where you just need a phone to talk to an Arduino, that distinction doesn't matter much. But for anything more involved, like two Arduino boards communicating wirelessly, the HC-05 is the right tool for the job.
Low power consumption mode in Arduino
Battery-powered Arduino projects have one common enemy: a board that drains power even when it has nothing to do. By default, Arduino runs at full speed continuously, burning through battery charge whether it's actively doing something or just waiting. Low power mode solves this by putting the microcontroller to sleep when it's idle, waking it up only when there's actual work to do. The concept is straightforward: the microcontroller spends most of its time asleep, wakes up to do something useful (take a sensor reading, send data, check a button), then goes back to sleep immediately.
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