--- title: OptoBlog | Jean Femia (2) description: Jean Femia writes about technical subjects and has focused on automation and control systems for more than 15 years. She likes learning about technology and taking corners in her Honda S2000. (2) --- - [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) - [MQTT Resources](https://www.opto22.com/products/mqtt-resources) - 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[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 ## Jean Femia Jean Femia writes about technical subjects and has focused on automation and control systems for more than 15 years. She likes learning about technology and taking corners in her Honda S2000. Find me on: ### Recent Posts ## [Request-response vs. publish-subscribe, part 1: What's the diff?](https://blog.opto22.com/optoblog/request-response-vs-pub-sub-part-1) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Feb 8, 2018, 11:17:12 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/network.jpg)](https://blog.opto22.com/optoblog/request-response-vs-pub-sub-part-1) We all know that computers and other electronic devices—printers, routers, laptops, smartphones, and more—are networked so they can exchange information. But how does that information get where it’s supposed to go? How does a spreadsheet get to the printer, a YouTube video get to your smartphone, or—most important for automation engineers—a value from a sensor get to your HMI? [Read More](https://blog.opto22.com/optoblog/request-response-vs-pub-sub-part-1) 3 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/request-response-vs-pub-sub-part-1#comments-listing) Topics: [groov](https://blog.opto22.com/optoblog/topic/groov), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Networking](https://blog.opto22.com/optoblog/topic/networking), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things), [Data acquisition](https://blog.opto22.com/optoblog/topic/data-acquisition), [MQTT](https://blog.opto22.com/optoblog/topic/mqtt) ## [Sneak preview for you: New Opto 22 website now available](https://blog.opto22.com/optoblog/sneak-preview-new-opto-22-website) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Feb 1, 2018, 10:02:00 AM - [Tweet](https://twitter.com/share) **[![New look for the Opto 22 website](https://blog.opto22.com/hs-fs/hubfs/new_website_640x309.png?width=320&name=new_website_640x309.png "New look for the Opto 22 website")](https://preview.opto22.com/)Let us know what you think.** Come [check out our new website at preview.opto22.com](https://preview.opto22.com/). This is just a preview of what's coming—a chance to try out the new features and locate the new homes of the information you need: products, downloads, videos, documents, and more.  [Read More](https://blog.opto22.com/optoblog/sneak-preview-new-opto-22-website) 1 Comment [Click here to read/write comments](https://blog.opto22.com/optoblog/sneak-preview-new-opto-22-website#comments-listing) Topics: [Updates](https://blog.opto22.com/optoblog/topic/updates), [optonews](https://blog.opto22.com/optoblog/topic/optonews) ## [Did you miss these? Top OptoBlog posts for 2017!](https://blog.opto22.com/optoblog/did-you-miss-these-top-optoblog-posts-for-2017) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Dec 28, 2017, 11:59:10 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/social-suggested-images/Compressor-5.jpg)](https://blog.opto22.com/optoblog/did-you-miss-these-top-optoblog-posts-for-2017) You've shown a lot of interest in our blog posts this last year—thank you. We hope they answer some of your questions and help make your automation projects easier. So to round out the year, take a look and see if you missed any of these popular posts.  **[Predictive maintenance on a compressor](https://blog.opto22.com/optoblog/predictive-maintenance-on-a-compressor)**. We'd all like to get a better handle on equipment maintenance, to reduce unnecessary expense, maximize efficiency, and avoid outages. See how a simple internet of things project could provide real value for your company. [Read More](https://blog.opto22.com/optoblog/did-you-miss-these-top-optoblog-posts-for-2017) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/did-you-miss-these-top-optoblog-posts-for-2017#comments-listing) Topics: [Case studies](https://blog.opto22.com/optoblog/topic/case-studies), [Food & beverage](https://blog.opto22.com/optoblog/topic/food-amp-beverage), [groov](https://blog.opto22.com/optoblog/topic/groov), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things), [Ignition Edge](https://blog.opto22.com/optoblog/topic/ignition-edge) ## [New videos: Introducing Ignition Edge on the groov Box](https://blog.opto22.com/optoblog/new-videos-introducing-ignition-edge-on-the-groov-box) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Dec 20, 2017, 6:00:00 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/IgnitionEDGElogo.png)](https://blog.opto22.com/optoblog/new-videos-introducing-ignition-edge-on-the-groov-box) ### [Read More](https://blog.opto22.com/optoblog/new-videos-introducing-ignition-edge-on-the-groov-box) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/new-videos-introducing-ignition-edge-on-the-groov-box#comments-listing) Topics: [groov](https://blog.opto22.com/optoblog/topic/groov), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things), [Node-RED](https://blog.opto22.com/optoblog/topic/node-red), [MQTT](https://blog.opto22.com/optoblog/topic/mqtt), [Ignition Edge](https://blog.opto22.com/optoblog/topic/ignition-edge) ## [2017 Holiday Schedule at Opto 22](https://blog.opto22.com/optoblog/2017-holiday-schedule-at-opto-22) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Dec 11, 2017, 11:00:00 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/HappyHolidays-2017_1600.png)](https://blog.opto22.com/optoblog/2017-holiday-schedule-at-opto-22) Wow, it's already the end of the year. The evenings are dark and the Christmas tree glistens in our lobby, as we look forward to the holidays with friends and family.  [Read More](https://blog.opto22.com/optoblog/2017-holiday-schedule-at-opto-22) 1 Comment [Click here to read/write comments](https://blog.opto22.com/optoblog/2017-holiday-schedule-at-opto-22#comments-listing) ## [New IoT Webinar: Live technologies demo](https://blog.opto22.com/optoblog/new-iot-webinar-live-technologies-demo) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Dec 7, 2017, 11:18:56 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/GroovEdgeRack_2-5%20x%204-5.jpg)](https://blog.opto22.com/optoblog/new-iot-webinar-live-technologies-demo) Is the Internet of Things (IoT) just a lot of hype, or can the IoT technologies we keep hearing about provide real value? RESTful APIs, Node-RED, and MQTT are just some of the new technical terms we're all starting to learn. If you'd like to see these technologies in action to understand how they might be useful for your applications, then join us for a new webinar on December 12.   Opto 22's Senior Applications Engineer Kyle Orman will demo these technologies and more. He'll show you how to exchange live data between real-world I/O and IoT platforms.  You'll see:  - IoT hardware that's proven in industrial locations - RESTful APIs to get data from PAC controllers - Examples of simple logic flows created with Node-RED  - Ignition Edge® OPC-UA drivers built into the  *groov* Box [Read More](https://blog.opto22.com/optoblog/new-iot-webinar-live-technologies-demo) 1 Comment [Click here to read/write comments](https://blog.opto22.com/optoblog/new-iot-webinar-live-technologies-demo#comments-listing) Topics: [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Machine builder](https://blog.opto22.com/optoblog/topic/machine-builder), [PACs](https://blog.opto22.com/optoblog/topic/pacs), [OEM](https://blog.opto22.com/optoblog/topic/oem), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [API](https://blog.opto22.com/optoblog/topic/api), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things), [Node-RED](https://blog.opto22.com/optoblog/topic/node-red), [Data acquisition](https://blog.opto22.com/optoblog/topic/data-acquisition), [MQTT](https://blog.opto22.com/optoblog/topic/mqtt), [Ignition Edge](https://blog.opto22.com/optoblog/topic/ignition-edge) ## [IoT Certified OptoPartner integrates MES/ERP systems with automation](https://blog.opto22.com/optoblog/iot-certified-optopartner-integrates-mes-erp-systems-with-automation) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Nov 20, 2017, 11:09:24 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/automobile_mfg_210x211.png)](https://blog.opto22.com/optoblog/iot-certified-optopartner-integrates-mes-erp-systems-with-automation) If you're a manufacturer interested in improving overall equipment effectiveness (OEE), you may find it difficult to integrate OEE with your manufacturing execution system (MES) or enterprise resource planning (ERP) system. Why? Because the IT (information technology) software systems traditionally used for MES and ERP don't interface with the PLCs and I/O systems used in production and manufacturing. [Read More](https://blog.opto22.com/optoblog/iot-certified-optopartner-integrates-mes-erp-systems-with-automation) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/iot-certified-optopartner-integrates-mes-erp-systems-with-automation#comments-listing) Topics: [Case studies](https://blog.opto22.com/optoblog/topic/case-studies), [Process control](https://blog.opto22.com/optoblog/topic/process-control), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things), [Data acquisition](https://blog.opto22.com/optoblog/topic/data-acquisition) ## [Improve your operations: New webinar offers IoT concepts & examples](https://blog.opto22.com/optoblog/optonews-new-webinar-offers-iot-concepts-examples-to-improve-your-operations) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Oct 18, 2017, 9:25:22 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/social-suggested-images/o_logo_4parts_320x234.png)](https://blog.opto22.com/optoblog/optonews-new-webinar-offers-iot-concepts-examples-to-improve-your-operations) Why is there so much talk about the Internet of Things (IoT)? Because companies are increasingly looking for data-based information to improve their operations.  [Read More](https://blog.opto22.com/optoblog/optonews-new-webinar-offers-iot-concepts-examples-to-improve-your-operations) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/optonews-new-webinar-offers-iot-concepts-examples-to-improve-your-operations#comments-listing) Topics: [Webinars](https://blog.opto22.com/optoblog/topic/webinars), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things) ## [OptoNews: Latest groov code samples available now](https://blog.opto22.com/optoblog/optonews-latest-groov-code-samples-available-now) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Oct 3, 2017, 3:07:22 PM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/groov_wExcelScreen.jpg)](https://blog.opto22.com/optoblog/optonews-latest-groov-code-samples-available-now) What if your operators could enter machine data on their phones and that data automatically appeared in a Microsoft® Excel® spreadsheet?  What if production or usage data from your spreadsheet was automatically updated in your supervisor's *groov* mobile operator interface? Could be pretty handy, right? Well, we've got a couple of code samples to show you how to make it happen.  [Read More](https://blog.opto22.com/optoblog/optonews-latest-groov-code-samples-available-now) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/optonews-latest-groov-code-samples-available-now#comments-listing) Topics: [groov](https://blog.opto22.com/optoblog/topic/groov), [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [optonews](https://blog.opto22.com/optoblog/topic/optonews), [Integrators](https://blog.opto22.com/optoblog/topic/integrators), [API](https://blog.opto22.com/optoblog/topic/api), [REST API](https://blog.opto22.com/optoblog/topic/rest-api), [REST](https://blog.opto22.com/optoblog/topic/rest), [mobile](https://blog.opto22.com/optoblog/topic/mobile), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things) ## [OptoNews: Fall 2017 Technology Showcase in Ontario](https://blog.opto22.com/optoblog/optonews-fall-2017-technology-showcase-in-ontario) Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on Sep 22, 2017, 9:28:52 AM - [Tweet](https://twitter.com/share) [![](https://blog.opto22.com/hubfs/social-suggested-images/SORT_250-3-5.png)](https://blog.opto22.com/optoblog/optonews-fall-2017-technology-showcase-in-ontario) Join us at the SORT Fall Technology Showcase in Ontario, Canada next Thursday, September 28. - See advanced solutions for automotive, metal and steel, food and beverage, pharmaceutical, cosmetics, and other industries. - Learn about the latest technologies to address your manufacturing challenges. - Attend live demonstrations and seminars. [Read More](https://blog.opto22.com/optoblog/optonews-fall-2017-technology-showcase-in-ontario) 0 Comments [Click here to read/write comments](https://blog.opto22.com/optoblog/optonews-fall-2017-technology-showcase-in-ontario#comments-listing) Topics: [Internet of Things](https://blog.opto22.com/optoblog/topic/internet-of-things), [IoT](https://blog.opto22.com/optoblog/topic/iot), [PACs](https://blog.opto22.com/optoblog/topic/pacs), [Events & conferences](https://blog.opto22.com/optoblog/topic/events-conferences), [IIoT](https://blog.opto22.com/optoblog/topic/iiot), [Industrial Internet of Things](https://blog.opto22.com/optoblog/topic/industrial-internet-of-things) [Previous](https://blog.opto22.com/optoblog/author/jean-femia/page/1) [All posts](https://blog.opto22.com/optoblog/all) [Next](https://blog.opto22.com/optoblog/author/jean-femia/page/3) ### Subscribe to Email Updates ### Recent Posts ### Posts by Topic - [groov EPIC (506)](https://blog.opto22.com/optoblog/topic/groov-epic) - 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