Moddable
@moddable.bsky.social
Tools for developers to create truly open IoT products using standard JavaScript on low-cost microcontrollers.
🎉 Meet KaozKit, a new SDK for integrating LLM agents written in industry-standard JavaScript into Swift apps.
🔥 KaozKit is a novel use of our XS JavaScript engine for embedded devices on the desktop, keeping it remarkably light and secure.
moddable.com/blog/kaozkit/
🔥 KaozKit is a novel use of our XS JavaScript engine for embedded devices on the desktop, keeping it remarkably light and secure.
moddable.com/blog/kaozkit/
September 15, 2026 at 2:22 PM
🎉 Meet KaozKit, a new SDK for integrating LLM agents written in industry-standard JavaScript into Swift apps.
🔥 KaozKit is a novel use of our XS JavaScript engine for embedded devices on the desktop, keeping it remarkably light and secure.
moddable.com/blog/kaozkit/
🔥 KaozKit is a novel use of our XS JavaScript engine for embedded devices on the desktop, keeping it remarkably light and secure.
moddable.com/blog/kaozkit/
👩🏽💻 Every JavaScript developer knows that they should minimize blocking.
🤔 Unfortunately, the usual remedy can actually reduce perceived performance.
🧑🎓 Our blog goes in-depth on three approaches so you'll understand the tradeoffs.
moddable.com/blog/asynchr...
🤔 Unfortunately, the usual remedy can actually reduce perceived performance.
🧑🎓 Our blog goes in-depth on three approaches so you'll understand the tradeoffs.
moddable.com/blog/asynchr...
September 10, 2026 at 8:05 PM
👩🏽💻 Every JavaScript developer knows that they should minimize blocking.
🤔 Unfortunately, the usual remedy can actually reduce perceived performance.
🧑🎓 Our blog goes in-depth on three approaches so you'll understand the tradeoffs.
moddable.com/blog/asynchr...
🤔 Unfortunately, the usual remedy can actually reduce perceived performance.
🧑🎓 Our blog goes in-depth on three approaches so you'll understand the tradeoffs.
moddable.com/blog/asynchr...
Our September Moddable SDK release is live.
🔤FreeType. Scalable fonts.
📡RFID/NFC. Tap.
🌐WebDAV. Files served everywhere.
📄XML. In 2026.
⚡HTTP Server. Fast. Reliable.
📘Guides. For you and your LLM.
⚙️ESP-IDF 6.1. Differential flashing for fast install.
github.com/Moddable-Ope...
🔤FreeType. Scalable fonts.
📡RFID/NFC. Tap.
🌐WebDAV. Files served everywhere.
📄XML. In 2026.
⚡HTTP Server. Fast. Reliable.
📘Guides. For you and your LLM.
⚙️ESP-IDF 6.1. Differential flashing for fast install.
github.com/Moddable-Ope...
Release Moddable SDK 9.5.0 · Moddable-OpenSource/moddable
Moddable SDK 9.5 contains improvements made between August 4, 2026 and September 4, 2026.
IMPORTANT: Because of the many changes in this release, we want to give our developers some time to work wi...
github.com
September 7, 2026 at 2:59 AM
Our September Moddable SDK release is live.
🔤FreeType. Scalable fonts.
📡RFID/NFC. Tap.
🌐WebDAV. Files served everywhere.
📄XML. In 2026.
⚡HTTP Server. Fast. Reliable.
📘Guides. For you and your LLM.
⚙️ESP-IDF 6.1. Differential flashing for fast install.
github.com/Moddable-Ope...
🔤FreeType. Scalable fonts.
📡RFID/NFC. Tap.
🌐WebDAV. Files served everywhere.
📄XML. In 2026.
⚡HTTP Server. Fast. Reliable.
📘Guides. For you and your LLM.
⚙️ESP-IDF 6.1. Differential flashing for fast install.
github.com/Moddable-Ope...
Web Streams are part of the Web’s foundation. But they’ve been out of reach for Embedded JavaScript. Until now.
🔥Moddable found a way to run streams efficiently on microcontrollers.🎉
Our blog tells the story of this huge step forward for embedded devs.
www.moddable.com/blog/web-str...
🔥Moddable found a way to run streams efficiently on microcontrollers.🎉
Our blog tells the story of this huge step forward for embedded devs.
www.moddable.com/blog/web-str...
August 25, 2026 at 6:00 PM
Web Streams are part of the Web’s foundation. But they’ve been out of reach for Embedded JavaScript. Until now.
🔥Moddable found a way to run streams efficiently on microcontrollers.🎉
Our blog tells the story of this huge step forward for embedded devs.
www.moddable.com/blog/web-str...
🔥Moddable found a way to run streams efficiently on microcontrollers.🎉
Our blog tells the story of this huge step forward for embedded devs.
www.moddable.com/blog/web-str...
Our Guides are a new kind of documentation, designed for Embedded JavaScript developers and their LLMs. Their code-first approach pairs small code snippets paired with concise explanations. They show how to perform common tasks simply. moddable.com/blog/guides/
August 21, 2026 at 1:02 AM
Our Guides are a new kind of documentation, designed for Embedded JavaScript developers and their LLMs. Their code-first approach pairs small code snippets paired with concise explanations. They show how to perform common tasks simply. moddable.com/blog/guides/
Our August Moddable SDK release is live with two features you can't miss!
🔥 Web Streams have landed, bringing another building block of the modern Web platform to Embedded JavaScript
📚 All-new Guides for Embedded JavaScript developers and their LLMs
github.com/Moddable-Ope...
🔥 Web Streams have landed, bringing another building block of the modern Web platform to Embedded JavaScript
📚 All-new Guides for Embedded JavaScript developers and their LLMs
github.com/Moddable-Ope...
Release Moddable SDK 9.0.0 · Moddable-OpenSource/moddable
Moddable SDK 9.0 contains improvements made between July 3, 2026 and August 4, 2026.
Moddable SDK 9.0 is a huge release with features that have been in the works for a long time. Its powerful new c...
github.com
August 5, 2026 at 9:03 PM
Our August Moddable SDK release is live with two features you can't miss!
🔥 Web Streams have landed, bringing another building block of the modern Web platform to Embedded JavaScript
📚 All-new Guides for Embedded JavaScript developers and their LLMs
github.com/Moddable-Ope...
🔥 Web Streams have landed, bringing another building block of the modern Web platform to Embedded JavaScript
📚 All-new Guides for Embedded JavaScript developers and their LLMs
github.com/Moddable-Ope...
🎉 ECMA-419 4th Edition is now official
Approved by the Ecma General Assembly in June 2026, this is the first release to arrive just one year after the previous edition. Our annual release cadence has begun.
Learn more: 419.ecma-international.org
#JavaScript #EmbeddedSystems
Approved by the Ecma General Assembly in June 2026, this is the first release to arrive just one year after the previous edition. Our annual release cadence has begun.
Learn more: 419.ecma-international.org
#JavaScript #EmbeddedSystems
ECMAScript® Embedded Systems API Specification
This Standard defines APIs for use on embedded systems
419.ecma-international.org
July 15, 2026 at 9:54 PM
🎉 ECMA-419 4th Edition is now official
Approved by the Ecma General Assembly in June 2026, this is the first release to arrive just one year after the previous edition. Our annual release cadence has begun.
Learn more: 419.ecma-international.org
#JavaScript #EmbeddedSystems
Approved by the Ecma General Assembly in June 2026, this is the first release to arrive just one year after the previous edition. Our annual release cadence has begun.
Learn more: 419.ecma-international.org
#JavaScript #EmbeddedSystems
🎉Congrats to our friend Ishikawa-san and the community he's inspired. The article begins with "The origin of Stack Chan and the choice of 'robots that run on JavaScript.'"
Now what JavaScript engine could run on this tiny robot? Click that Translate button to find out. codezine.jp/article/deta...
Now what JavaScript engine could run on this tiny robot? Click that Translate button to find out. codezine.jp/article/deta...
「ロボットの死」をオープンソースで救いたい！ 1万人規模のコミュニティへと育つ「スタックチャン」の原点と生成AIが描く未来
手のひらサイズの可愛いコミュニケーションロボット「ｽﾀｯｸﾁｬﾝ」（以下、スタックチャン）。2021年の誕生以来、その愛らしい姿と、Webエンジニアに馴染み深い「JavaScriptで動く」という特徴から、多くのメイカーやエンジニアを魅了し続けています。本記事では、開発者の石川真也（ししかわ）氏にインタビューを行った。ハードウェア未経験だったWebエンジニアが、周囲のサポートで障壁を乗り越えた軌跡...
codezine.jp
June 5, 2026 at 5:31 AM
🎉Congrats to our friend Ishikawa-san and the community he's inspired. The article begins with "The origin of Stack Chan and the choice of 'robots that run on JavaScript.'"
Now what JavaScript engine could run on this tiny robot? Click that Translate button to find out. codezine.jp/article/deta...
Now what JavaScript engine could run on this tiny robot? Click that Translate button to find out. codezine.jp/article/deta...
Our June Moddable SDK release is live!
🕷️xsbug for Pebble Alloy
🏠Home Assistant control with WebSockets
🌐ECMA-419 Wi-Fi by default
👆More responsive touch with async SMBus & I²C
⚡Faster rendering with RGB565 BE pixels
🔄Rotate Waveshare AMOLED 206 screen
github.com/Moddable-Ope...
🕷️xsbug for Pebble Alloy
🏠Home Assistant control with WebSockets
🌐ECMA-419 Wi-Fi by default
👆More responsive touch with async SMBus & I²C
⚡Faster rendering with RGB565 BE pixels
🔄Rotate Waveshare AMOLED 206 screen
github.com/Moddable-Ope...
Release Moddable SDK 8.2.0 · Moddable-OpenSource/moddable
Moddable SDK 8.2 contains improvements made between May 7, 2026, and June 3, 2026.
It has been another busy month in the Embedded JavaScript universe. Thanks to the many developers who have shared ...
github.com
June 3, 2026 at 11:53 PM
Our June Moddable SDK release is live!
🕷️xsbug for Pebble Alloy
🏠Home Assistant control with WebSockets
🌐ECMA-419 Wi-Fi by default
👆More responsive touch with async SMBus & I²C
⚡Faster rendering with RGB565 BE pixels
🔄Rotate Waveshare AMOLED 206 screen
github.com/Moddable-Ope...
🕷️xsbug for Pebble Alloy
🏠Home Assistant control with WebSockets
🌐ECMA-419 Wi-Fi by default
👆More responsive touch with async SMBus & I²C
⚡Faster rendering with RGB565 BE pixels
🔄Rotate Waveshare AMOLED 206 screen
github.com/Moddable-Ope...
Reposted by Moddable
Coming soon to the @repebble.com SDK - touch support! Will arrive in the Alloy JavaScript SDK first
Thank you Moddable.com team!
Example app code github.com/Moddable-Ope...
Thank you Moddable.com team!
Example app code github.com/Moddable-Ope...
April 17, 2026 at 4:15 AM
Coming soon to the @repebble.com SDK - touch support! Will arrive in the Alloy JavaScript SDK first
Thank you Moddable.com team!
Example app code github.com/Moddable-Ope...
Thank you Moddable.com team!
Example app code github.com/Moddable-Ope...
Touch – coming soon to PebbleOS.
Alloy makes it fast and responsive.
Standard JavaScript.
ECMA-419 touch API.
Poco mini-drag app, freshly updated.
This is what the future of Pebble feels like.
Alloy makes it fast and responsive.
Standard JavaScript.
ECMA-419 touch API.
Poco mini-drag app, freshly updated.
This is what the future of Pebble feels like.
April 16, 2026 at 11:14 PM
Touch – coming soon to PebbleOS.
Alloy makes it fast and responsive.
Standard JavaScript.
ECMA-419 touch API.
Poco mini-drag app, freshly updated.
This is what the future of Pebble feels like.
Alloy makes it fast and responsive.
Standard JavaScript.
ECMA-419 touch API.
Poco mini-drag app, freshly updated.
This is what the future of Pebble feels like.
Our April Moddable SDK release is live!
⚙️ESP-IDF v6 - Espressif's latest
📘TypeScript 6 - Microsoft's latest
⚡More efficient JavaScript stack use
🐞xsdb - gdb style debugging for Embedded JS
👆Touch for PebbleOS using ECMA-419
⌚WaveShare Touch Watch support
github.com/Moddable-Ope...
⚙️ESP-IDF v6 - Espressif's latest
📘TypeScript 6 - Microsoft's latest
⚡More efficient JavaScript stack use
🐞xsdb - gdb style debugging for Embedded JS
👆Touch for PebbleOS using ECMA-419
⌚WaveShare Touch Watch support
github.com/Moddable-Ope...
Release Moddable SDK 8.0.0 · Moddable-OpenSource/moddable
Moddable SDK 8.0 contains improvements made between March 13, 2026 and April 13, 2026.
ESP-IDF v6
We've upgraded to the new ESP-IDF v6 from Espressif. This is a required update for ESP32 developme...
github.com
April 16, 2026 at 7:53 PM
Our April Moddable SDK release is live!
⚙️ESP-IDF v6 - Espressif's latest
📘TypeScript 6 - Microsoft's latest
⚡More efficient JavaScript stack use
🐞xsdb - gdb style debugging for Embedded JS
👆Touch for PebbleOS using ECMA-419
⌚WaveShare Touch Watch support
github.com/Moddable-Ope...
⚙️ESP-IDF v6 - Espressif's latest
📘TypeScript 6 - Microsoft's latest
⚡More efficient JavaScript stack use
🐞xsdb - gdb style debugging for Embedded JS
👆Touch for PebbleOS using ECMA-419
⌚WaveShare Touch Watch support
github.com/Moddable-Ope...
Apple’s 50th, on your Pebble watch.
Classic watch cursor, straight from the icon garden.
All in 66 lines of JavaScript.
“Designed by Moddable in Belgium.”
What makes it tick? github.com/Moddable-Ope...
Classic watch cursor, straight from the icon garden.
All in 66 lines of JavaScript.
“Designed by Moddable in Belgium.”
What makes it tick? github.com/Moddable-Ope...
April 15, 2026 at 9:02 PM
Apple’s 50th, on your Pebble watch.
Classic watch cursor, straight from the icon garden.
All in 66 lines of JavaScript.
“Designed by Moddable in Belgium.”
What makes it tick? github.com/Moddable-Ope...
Classic watch cursor, straight from the icon garden.
All in 66 lines of JavaScript.
“Designed by Moddable in Belgium.”
What makes it tick? github.com/Moddable-Ope...