Espruino-JavaScript for Microcontrollers

The world’s first JavaScript microcontroller for beginners or experts, now Open Source. Be creative with intelligent control!

What is Espruino?

Espruino is a small computer that anyone can use to control things around them. Its JavaScript interpreter gives you instant feedback so that you can experiment and develop whatever your level of experience. Even if you can’t program, you can still get started quickly with our Web-based graphical code editor!

espruino-javascript microcontroller
You don’t need any compilation or ‘flashing’ step, or any software on the host computer. You just write code, and as soon as you type a command it executes.

Open Source

What makes it stand out from other boards?

  • Write code using the extremely popular JavaScript language
  • You can be writing code just a few minutes after unboxing
  • Uses much less power than Linux boards (like the Raspberry Pi), so will run for longer on batteries
  • Loads of IO pins, with multiple I2C, SPI, USART, and Analog Inputs and Outputs
  • It can be used as an IO board for your PC, Mac or Raspberry Pi – there’s no need to program it first.
  • Event-based programming allows different bits of code to be used together much more easily.
  • You can debug by inspecting variables as the code is running.
  • Simply Copy + Paste different bits of code together to create your project.

More info on

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