Espruino JavaScript microcontroller firmware
currentThe Espruino JavaScript microcontroller firmware is tracked under makers & open firmware. Its latest firmware, 2V29, shipped on Feb 24, 2026.
- Latest firmware
- 2V29
- Released
- Category
- Makers & open firmware
- Last checked
How to update the Espruino JavaScript microcontroller firmware
- Read the release notes first — firmware changes can require re-doing your config or calibration.
- Use the project's own installer where it has one: a web flasher over USB, or an over-the-air update in its web UI.
- Otherwise build or download the binary for your exact board from the releases page — the wrong board file will not boot.
- Keep the previous firmware image and your config backed up so you can roll back.
Always download firmware from the manufacturer or project itself. Firmwarely links out; it never hosts firmware.
What changed
RELEASE_2V29
Version history
| 2V29 |
FAQ
What is the latest firmware for the Espruino JavaScript microcontroller firmware?
Version 2V29, released Feb 24, 2026. This page is refreshed every hour from the manufacturer's release page.
How do I update the Espruino JavaScript microcontroller firmware?
See the step-by-step above. Follow the project's release page for the flashing or OTA procedure. Many maker devices update from a web installer or the project's desktop app.
How does Firmwarely know when there's a new version?
Every hour we read the manufacturer's official release page for the Espruino JavaScript microcontroller firmware and record the version, date and changelog. Subscribers watching this device get an email when it changes: the next morning on Pro, in the Monday roundup on the free plan.
Is this an official Espruino page?
No. Firmwarely is independent. Device and brand names belong to their manufacturers; always download firmware from the official source.
Get alerts for Espruino JavaScript microcontroller firmware
One email when new firmware or a security fix ships: weekly and free for up to 3 devices, daily on Pro.