Get Hands-On With Microcontrollers — No Hardware Required
Physical computing has never been more accessible, but there's still one fairly significant hurdle standing between a curious beginner and their first blinking LED: actually owning the hardware. Raspberry Pi Picos, Arduinos, and ESP32 boards are hardly expensive by any measure, but when you're not yet sure whether embedded development is for you, even a modest outlay can feel like a gamble. That's where Wokwi comes in — and it's rather good.
Wokwi is a browser-based microcontroller simulator that lets you build and run circuits entirely online, no soldering iron or jumper wires required. It supports a solid range of popular boards including the Raspberry Pi Pico, Arduino Uno, Mega and Nano, the ESP32, and the STM32 — covering the vast majority of platforms that hobbyists and students are likely to encounter. Everything runs directly in your browser, and getting started costs nothing beyond a free account sign-up.
A Genuine Taste of MicroPython
One of Wokwi's biggest strengths is its MicroPython support. For the uninitiated, MicroPython is a lean, efficient implementation of Python 3 designed specifically to run on microcontrollers — hardware where memory is measured in kilobytes rather than gigabytes. If you already know a bit of standard Python, you'll feel right at home; the syntax is familiar, and the differences are mostly things you'll only bump into once you're deep enough to care about them.
Being able to write and execute real MicroPython code against a simulated Raspberry Pi Pico is genuinely useful. You're not just going through the motions — the simulator faithfully replicates the behaviour of the hardware, so the skills and code you develop translate directly to the real thing when you're ready to take the plunge.
Starter Projects Worth Your Time
Wokwi ships with an impressive library of community projects and starter templates that make it easy to hit the ground running. Standouts include a fully playable Simon Says game built on the Arduino simulator — a surprisingly complete project that neatly demonstrates how to handle button inputs, drive LEDs, and implement basic game logic in an embedded context. There's also an ESP32 NTP clock, a MicroPython MQTT weather logger, and an Arduino calculator, among plenty of others. Whether you're after a quick win or a more substantial challenge, there's something here to get your teeth into.
Better Than a micro:bit? Quite Possibly
If your previous foray into physical computing involved a BBC micro:bit, you may have found the experience a touch limited — the board has its place, particularly in education, but it can feel restrictive once you're keen to do anything more ambitious. Wokwi, by contrast, gives you access to the kind of hardware that professional developers and serious hobbyists actually use, which makes the transition to real-world making considerably smoother.
It's worth being clear-eyed about what Wokwi is and isn't. There's no substitute for the tactile experience of wiring up a real circuit, troubleshooting a dodgy connection, or holding a finished project in your hands. But as a risk-free way to explore the world of microcontrollers, learn MicroPython, and decide whether physical computing is something you want to invest in further, it's difficult to fault. Highly recomm