Espruino
Developer(s)Gordon Williams
Repositorygithub.com/espruino/Espruino
LicenseMPL 2.0
Websitewww.espruino.com

Espruino is an open-source JavaScript interpreter for single board microcontrollers. It is designed for devices with small amounts of RAM (as low as 8kB[1]).

Overview

Espruino was created by Gordon Williams in 2012 as an attempt to make microcontroller development truly multiplatform.[2][3] Though initially not open-source, the Espruino firmware was offered as a free download for STM32 microcontrollers.[4] It was made open-source in 2013 after a successful Kickstarter campaign[5] for a development board running the software.[6] Since the original Espruino board, there have been a number of new official development boards including the small USB thumb-drive-sized Espruino Pico,[7] the Wifi-equipped Espruino WiFi, the Puck.js with built-in Bluetooth and the Pixl.js[8] with a built-in LC display and Arduino shield compatibility. In addition to the official boards, Espruino runs on approximately 40 other types of development boards[9][3] including the ESP8266.[10][11]

There is a large body of reference material for Espruino including over 100 tutorials[12] as well as the book Making Things Smart[13] which contains a selection of hardware projects that can be created with Espruino-based microcontrollers.

To achieve maximal memory efficiency, Espruino executes code from source directly inside the parser, without the use of an Abstract Syntax Tree or intermediate bytecode.[14]

Hardware

The Original Espruino, the first official development board.
The Original Espruino, the first official development board, offers 44 GPIO pins, Micro SD card support, a Micro USB interface and controllable LEDs and buttons. It has 256 KB of flash and 48 KB of RAM and runs on a 72 MHz ARM Cortex M3 processor.

The first official development board was the Original Espruino. Later boards are available in a variety of form factors. The Original Espruino was followed by the Espruino Pico, Espruino WiFi, Puck.js and Pixl.js. A breakout board featuring the MDBT42Q Bluetooth LE module, the same used in the Puck.js and Pixl.js, is also available.


Software

Espruino Web-Based IDE
Developer(s)Gordon Williams
Repositorygithub.com/espruino/EspruinoWebIDE
LicenseApache License 2.0
Websitewww.espruino.com/ide/

Espruino programs are written using JavaScript. The Espruino IDE is available as a web-based app, a Google Chrome App and as a native Windows application.[15] Alternative methods of programming Espruino boards include using terminal programs such as PuTTY on Windows.[16]

License

All of Espruino is Open Source. The different parts are licensed as follows:

References

  1. ↑ "Espruino Performance Notes". www.espruino.com. Retrieved 2018-06-04.
  2. ↑ Make Boards Guide 2017. Senese, Mike. Make Books. 2017. p. 33. ISBN 9781680453423. OCLC 987280329.{{cite book}}: CS1 maint: others (link)
  3. 1 2 "Espruino: The Challenges of Running an Open Source Hardware and Software Company | Make". Make: DIY Projects and Ideas for Makers. 2017-06-01. Retrieved 2018-06-01.
  4. ↑ "A JavaScript interpreter for ARM 'micros". Hackaday. 2012-10-05. Retrieved 2018-06-01.
  5. ↑ "Espruino: JavaScript for Things". Kickstarter. Retrieved 2018-06-04.
  6. ↑ {{{1}}}.
  7. ↑ "Javascript by the Pico | Make". Make: DIY Projects and Ideas for Makers. 2014-11-11. Retrieved 2018-06-04.
  8. ↑ Make. "Angetestet: Pixl.js - Espruino-Bastelboard mit Bluetooth und Display". Make (in German). Retrieved 2018-06-04.
  9. ↑ Make Boards Guide 2017. Senese, Mike. Make Books. 2017. p. 35. ISBN 9781680453423. OCLC 987280329.{{cite book}}: CS1 maint: others (link)
  10. ↑ Node.js for Embedded Systems. Mulder, Patrick. Oreilly & Associates Inc. 2015. p. 45. ISBN 9781491928967. OCLC 965413450.{{cite book}}: CS1 maint: others (link)
  11. ↑ "Espruino For You Sir - Scargill's Tech Blog". Scargill's Tech Blog. 2017-04-11. Retrieved 2018-06-04.
  12. ↑ "Tutorials and Examples - Espruino". www.espruino.com. Retrieved 2018-06-04.
  13. ↑ F., Williams, Gordon (2017). Making things smart : easy embedded JavaScript programming for making everyday objects into intelligent machines (First ed.). San Francisco, CA. ISBN 9781680451894. OCLC 964820771.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: multiple names: authors list (link)
  14. ↑ "Espruino Documentation".
  15. ↑ "Espruino Web IDE". www.espruino.com. Retrieved 2019-05-28.
  16. ↑ "Using Alternative Terminal Apps - Espruino". www.espruino.com. Retrieved 2019-05-28.
  17. ↑ "espruino/Espruino". GitHub. Retrieved 2018-06-04.
  18. 1 2 "espruino/EspruinoDocs". GitHub. Retrieved 2018-06-04.
  19. ↑ "espruino/EspruinoBoard". GitHub. Retrieved 2018-06-04.
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