--- title: "groov EPIC & RIO Firmware 4.0: Future-Ready, Backward-Compatible" description: This new firmware release upgrades the foundation of all your groov EPIC and RIO devices—without changing what works. image: https://blog.opto22.com/hubfs/Firmware-40-sq-social%20graphic-20250617-v9-transBG.png --- - [Log in](https://www.opto22.com/logon?returnurl=%2f) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us) [![Opto 22 Logo](https://blog.opto22.com/hubfs/opto22_lightsilvergradient_800px.png "Opto 22 Logo")](https://www.opto22.com) - [Products](https://www.opto22.com/products) - [What Do You Want to Do?](https://www.opto22.com/products/what-do-you-want-to-do) - [groov RIO](https://www.opto22.com/products/groov-rio) - [groov EPIC System](https://www.opto22.com/products/groov-epic-system) - [Case Studies](https://www.opto22.com/products/groov-case-studies) - [Product Selector](https://www.opto22.com/products/product-selector) - 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[Technology Partners](https://www.opto22.com/community/technology-partners) - [Education Partnerships](https://info.opto22.com/partnering-in-education) - [Opto Blog](https://blog.opto22.com/) - [Opto Forums](http://forums.opto22.com/) - [Events](https://www.opto22.com/community/events) - [Articles](https://www.opto22.com/articles) - [Log In](https://www.opto22.com/logon) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us)   # groov EPIC & RIO Firmware 4.0: Future-Ready, Backward-Compatible # OptoBlog # groov EPIC & RIO Firmware 4.0: Future-Ready, Backward-Compatible Posted by [Dan White](https://blog.opto22.com/optoblog/author/dan-white) on Jun 18, 2025, 7:30:27 AM - [Tweet](https://twitter.com/share) ### This new firmware release upgrades the foundation of all your *groov *EPIC and RIO devices—without changing what works. Firmware 4.0 transforms the core of every *groov* device we’ve ever shipped, while keeping everything you rely on right where you left it. Learn what's new, along with how and why you should update. ##### Works on every *groov* device—since day one. Same feel. Same blue buttons. From the outside, it all looks the same. And that’s the point. What you see hasn’t changed. Your familiar blue buttons? Still there, right where you expect them.  But behind the scenes, 4.0 installs a brand-new Linux kernel—the core of the Operating System (OS) that runs every app and process on your *groov *device—quietly preparing your EPICs and RIOs for the next generation of high-impact features. ##### And here’s the part that’s almost unheard of: You can install this same firmware on every [*groov* EPIC](https://www.opto22.com/products/groov-epic-system) and [RIO](https://www.opto22.com/products/groov-rio) we’ve ever shipped. That’s not accidental. It’s exactly why we built the platform the way we did: to grow with the industry, evolving technology, and *your* needs. ![EPIC40blog1](https://blog.opto22.com/hs-fs/hubfs/EPIC40blog1.png?width=600&height=434&name=EPIC40blog1.png) ##### What you’ll notice right away ### **Ready faster** Firmware 4.0 brings noticeably faster boot times to all *groov* EPICs—almost 50% faster! The controller is ready in about 1 minute 17 seconds, and the login screen appears just 28 seconds later, at 1 minute 45—a substantial improvement over earlier versions. Faster startups mean you get quicker updates, faster reboots, and less downtime exactly where it counts. ![EPIC40blog2](https://blog.opto22.com/hs-fs/hubfs/EPIC40blog2.png?width=500&height=274&name=EPIC40blog2.png) ### **More WiFi adapter options** Firmware 4.0 expands support, giving you access to a broader range of modern, easier-to-find USB-to-WiFi adapters. If you're already using one of the original adapters, no action is needed—they're still fully supported. But if you’ve had trouble sourcing one of the previously approved WiFi dongles, this update should make things a lot easier. All of these are now supported: ![EPIC40blog3](https://blog.opto22.com/hs-fs/hubfs/EPIC40blog3.png?width=500&height=328&name=EPIC40blog3.png) ### **Upgraded software, smoother experience** Firmware 4.0 updates key software platforms across the board, making your development, integration, and visualization workflows faster and more flexible. ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXd3v7N70Y_eJrtLoavhjg6j5aG-_TG6_mMwRlDzvwYNsjDFedwzNg1u_OROvT_Tpc9PUqfuruFnqYM5c_9zFvmoi2NOUPqDzlkj81uRkJQSn1kvrWz-lMbmXE3maP4PPjOjUiWJ?key=KJl-G1zZMhAfU2TIHEGyALYO) **Node-RED** now runs on Node.js 20.12.2. That means node installations, like the popular serial node, no longer require jumping through compatibility hoops in *groov* Manage. You can install what you need without rolling back or sideloading. Your existing flows stay intact, and updates are now quick and clean. **![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcbw29zcHJfSF0bf_c-hHPVGUK5KvU0e501dOZYceiQ0GdwZzbhxjZIN56Q7WIxkzphLkxKbijcKxCllj5zKhzPSDvXQK5YWXFebZfMN1PWFAUCBgGLw8N0twGT2ridpE3IKxaLbQ?key=KJl-G1zZMhAfU2TIHEGyALYO)** **Ignition/Ignition Edge** revved to version 8.1.47, with updated Cirrus Link MQTT modules (v4.0.29). And thanks to the Chromium browser upgrade, you can now run [Ignition’s Perspective](https://inductiveautomation.com/ignition/modules/perspective) (web-based UI) directly on your EPIC's touchscreen or connected HDMI display—no hacks, no external clients. This version also includes general bug fixes and security updates to help keep your system stable and supported. **![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcfcYk0LP4ZX-FklmD-Ff87G-YpdhiL289KNOST9vv_OIHjrO6EbEgeAHT2onLIt6Cwu3QPIx0XwfOc0Cs-nE5LH2e8PUbo7Yx8MoTfx2yX4qMxjPKPWJTHR3CS_LitSey3HhPFuA?key=KJl-G1zZMhAfU2TIHEGyALYO)** **CODESYS** gets an updated runtime, device library, and the now-included OPC-UA client license. While there are no major changes here, this patch addressed a security vulnerability in the OPC-UA stack—an [important fix](https://us.store.codesys.com/) for secure deployments. **![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfJEmrLuK_yiuAd7DlsF3z_lRcW9B1FOXYtLIFVphT-E0I2EWZsMgn5S7RastJo6DxwcI75NUUcssKkPPT5AlzVezxUKeAZCweCK6d1wF89M-UMCHQMLtHXzUWFVME9RER_k-sHWg?key=KJl-G1zZMhAfU2TIHEGyALYO)** **Python 3.10.14** is now the system version. If you work in the shell or run custom scripts, you now have better access to modern libraries and a more stable development environment. **![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfAgGUweU5wqra9NGEh8L_4fFWDwW1g6TEYXU0uSb3ghDwwJAi_Z0meQLkyErFeFepXLatI21P4IBg45MsKIM-WVb9Rm5-p2kpG8Ybpq4HEKMnaw3CpRZjmHYi5-kvc_KhX4cIKQg?key=KJl-G1zZMhAfU2TIHEGyALYO)** **Docker container support** is now available in firmware 4.0. If you're working in the shell and have a license, you can run lightweight, isolated applications directly on your *groov *device. It’s a powerful new capability for advanced use cases, backed by docs and community support at[developer.opto22.com](https://developer.opto22.com/). ### **Looking for a deeper dive?** Terry Orchard penned an [OptoForum post](https://forums.opto22.com/t/groov-epic-rio-4-0-firmware-released/6601/1) with many of the technical details found under the hood.  ##### Ready to upgrade? Firmware 4.0 is available now—free, as always. \*\*Due to the significance of this release, we strongly recommend reviewing the release notes before installing your firmware, especially if you use CODESYS or Ignition: [![EPIC 4.0 RELEASE NOTES](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/45ef9b5f-d4c2-4da3-862a-707c3e8f6f7d.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/45ef9b5f-d4c2-4da3-862a-707c3e8f6f7d) [![RIO 4.0 RELEASE NOTES](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/01f70bfe-3052-41ba-b505-29c40064047b.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/01f70bfe-3052-41ba-b505-29c40064047b) We’ve laid the foundation. What you build on it is entirely up to you. Enjoy the update! - ***groov* EPIC PR1 & PR2**: Download from your [MyOpto Portal.](https://www.opto22.com/logon) - ***groov* RIO MM1, MM2, & EMU**:[Get the firmware here.](https://www.opto22.com/support/resources-tools/downloads/groov-rio-module-firmware) [![groov EPIC FIRMWARE 4.0](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/b0c63ee0-4967-441c-9830-546a361f1119.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/b0c63ee0-4967-441c-9830-546a361f1119) [![RIO MM1 FIRMWARE 4.0](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/a6f855c9-a9d2-4986-bb7e-93372adac9b4.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/a6f855c9-a9d2-4986-bb7e-93372adac9b4) [![RIO MM2 FIRMWARE 4.0](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/cb8fc230-0099-4287-9576-b8e621e4bcfd.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/cb8fc230-0099-4287-9576-b8e621e4bcfd) [![RIO EMU FIRMWARE 4.0](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/518e61ba-e46f-4563-95d2-0763f08f2b8e.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/518e61ba-e46f-4563-95d2-0763f08f2b8e) Topics: [Updates](https://blog.opto22.com/optoblog/topic/updates), [Firmware](https://blog.opto22.com/optoblog/topic/firmware), [groov EPIC](https://blog.opto22.com/optoblog/topic/groov-epic), [groov RIO](https://blog.opto22.com/optoblog/topic/groov-rio), [groov rio emu](https://blog.opto22.com/optoblog/topic/groov-rio-emu) ### Written by [Dan White](https://blog.opto22.com/optoblog/author/dan-white) Dan has worked at Opto 22 for more than a decade. His Tufts Engineering background, MBA in International Business, and prior industrial controls experience give him a unique edge in automation. Dan enjoys staying active through biking, basketball, skiing – and keeping up with his three young kids! 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