Espruino - JavaScript for Microcontrollers

Bangle.js 2, the Open Smart watch

Our new Smart Watch. Sunlight readable, 2 week battery life, JavaScript, and tons of free apps

On KickStarter Now!

Espruino Boards, Accessories, Modules, and kits,
straight from the manufacturer.

Take a look!

JavaScript + Bluetooth = ♥

A JavaScript microcontroller you can program and debug wirelessly.
No software needed - get started in seconds with Web Bluetooth!

Buy Now! More information »

JavaScript on Board

With Maps, Dynamic Arrays and Objects out of the box.
Just plug in and start creating in seconds.

Buy Now, just $24.95 / £20.00

Get Started Quickly

A large selection of tutorials, all searchable and indexed by the hardware they use ensures that you're up and running in no time!

Quick Start View Tutorials

Easy to Connect

With a growing list of libraries and documentation for many common devices, use Espruino to quickly prototype your next product

View Modules

Tiny and easy to integrate

The Pico's small size and castellated edges make it easy to embed in your product, drastically reducing development time and cost.

Espruino Pico

"The Language of the Web" is used everywhere - your laptop, phone, TV, and the servers that power the internet. With Espruino you can use it on a low power microcontroller too!

Responsive

Espruino is an interpreter. It gives you instant feedback so you can view, debug and modify your program while it is running

Get Started! »

Fully Open Source

Hardware (CC-BY-SA), software (MPLv2), and documentation. Add functionality, tweak it, or just browse and see how it works.

Donate » Fork us on GitHub »

Everything on one chip for the lowest power consumption.

Espruino has everything it needs on a single chip. This makes it affordable, reliable, and power efficient - allowing it to run for years on a battery.

See the Espruino boards:
Original Pico WiFi Puck.js Pixl.js MDBT42Q

No software needed. Get started in seconds

Espruino boards use Bluetooth LE or plug in to your computer by USB. No drivers, no special software. Just open a terminal app and start writing code!

See our 'Quick Start' tutorial

Espruino Web IDE makes coding even easier

It installs in seconds and provides a modern Syntax Highlighted editor with code completion and even debugging. It even automatically loads any modules you need from the internet.

Try it online or Install the Chrome App

The Graphical Editor lets you use Espruino even if you can't code!

The optional graphical editor makes it quick and easy to create simple devices, even if you've never programmed before.