--- title: OptoBlog | Version 3.4 update description: Version 3.4 update | --- - [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) - [Product Families](https://www.opto22.com/products/product-families) - [IIoT System Architecture](https://www.opto22.com/support/resources-tools/demos/groov-epic-groov-rio-architecture) - 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[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)   # OptoBlog # OptoBlog ## [Time to update: groov RIO 3.4 with OPC UA server](https://blog.opto22.com/optoblog/time-to-update-groov-rio-3.4-with-opc-ua-server) Posted by [Janice Colmer](https://blog.opto22.com/optoblog/author/janice-colmer) on Jul 13, 2022, 10:00:00 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/RIOwOPCUA.jpg)](https://blog.opto22.com/optoblog/time-to-update-groov-rio-3.4-with-opc-ua-server) ### Following the recent *groov* EPIC 3.4 firmware update, *groov* RIO offers similar updates in its 3.4 release. Here are some exciting additions in the latest *groov* RIO 3.4 package. All these new features are available in all *groov* RIO models: [MM1](https://www.opto22.com/support/resources-tools/downloads/grv-r7-mm1001-10-firmware), [MM2](https://www.opto22.com/support/resources-tools/downloads/grv-r7-mm2001-10-firmware) and [RIO EMU](https://www.opto22.com/support/resources-tools/downloads/grv-r7-i1vapm-3-firmware). The biggest news is the embedded OPC UA server. This is a first of its kind: a fully functioning OPC UA server option for a remote, Ethernet-based input/output module. [Read More](https://blog.opto22.com/optoblog/time-to-update-groov-rio-3.4-with-opc-ua-server) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/time-to-update-groov-rio-3.4-with-opc-ua-server#comments-listing) Topics: [Updates](https://blog.opto22.com/optoblog/topic/updates), [MQTT](https://blog.opto22.com/optoblog/topic/mqtt), [groov RIO](https://blog.opto22.com/optoblog/topic/groov-rio), [OPC UA](https://blog.opto22.com/optoblog/topic/opc-ua), [groov rio emu](https://blog.opto22.com/optoblog/topic/groov-rio-emu), [Version 3.4 update](https://blog.opto22.com/optoblog/topic/version-3-4-update) ## [Big release news: groov EPIC 3.4 firmware is here](https://blog.opto22.com/optoblog/big-release-news-groov-epic-3.4-firmware-is-here) Posted by [Ben Orchard](https://blog.opto22.com/optoblog/author/ben-orchard) on Jun 22, 2022, 8:15:46 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/EPIC34releasePR.jpg)](https://blog.opto22.com/optoblog/big-release-news-groov-epic-3.4-firmware-is-here) ### Major release adds embedded OPC UA server, expanded MQTT/Sparkplug options, SNMP, Scratch Pad data access, and more Everyone here at Opto is very excited to announce that the latest EPIC firmware update is now live. Just as you update the OS on your phone to get the latest improvements in security, stability and performance, the OS on your [*groov* EPIC](https://www.opto22.com/products/groov-epic-system) is no different. It is after all, a quad core Linux computer, so updates are very important for the exact same reasons: security, stability, and performance. And often these updates come with some cool new features. With this release, you'll find several. [Read More](https://blog.opto22.com/optoblog/big-release-news-groov-epic-3.4-firmware-is-here) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/big-release-news-groov-epic-3.4-firmware-is-here#comments-listing) Topics: [Updates](https://blog.opto22.com/optoblog/topic/updates), [Firmware](https://blog.opto22.com/optoblog/topic/firmware), [Node-RED](https://blog.opto22.com/optoblog/topic/node-red), [MQTT](https://blog.opto22.com/optoblog/topic/mqtt), [groov EPIC](https://blog.opto22.com/optoblog/topic/groov-epic), [OPC UA](https://blog.opto22.com/optoblog/topic/opc-ua), [Version 3.4 update](https://blog.opto22.com/optoblog/topic/version-3-4-update) [All posts](https://blog.opto22.com/optoblog/all) ### Subscribe to Email Updates ### Recent Posts ### Posts by Topic - [groov EPIC (507)](https://blog.opto22.com/optoblog/topic/groov-epic) - [groov RIO (302)](https://blog.opto22.com/optoblog/topic/groov-rio) - [optonews (218)](https://blog.opto22.com/optoblog/topic/optonews) - 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