Opto22 - Resources & Tools

Hello, I am new to tinkering with Linux, but have decades of experience with control systems off all kinds. I have a non production Epic PR2 sitting on my desk with SSH license installed running v4...more

Error message when trying to create Data Service server certificate with fixed IP address

Knowledge Base - KB91386 - 1/22/2026

When you try to create a certificate for the Data Service and you specify a static IP address in the Server Name field, when you click Create, groov Manage displays an error message and does not create the certificate.

Hosting PWA in node-red without login (so public access)

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I have various control apps on epic that I run my own PWA webapps for the hMI, and I since I was also doing some node-red, I thought the easiest hosting method may be to host the files in unsecured...more

Using Opto 22’s groov Products in 21 CFR Part 11 Compliant Environments

Documents - 2448 - 1/14/2026

This form explains how Opto 22 groov platforms support the electronic record, authentication, audit, and data-integrity requirements for life sciences manufacturing defined in Title 21 of the Code of...more

Check RTC Battery Voltage through SSH/Terminal

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Just wondering if this is possible. On a PR1 with shell access, is there any command I can use to pull the RTC battery voltage? I snooped around /sys/class/rtc but did not see anything that exposed the...more

Best Kid Birthday Party Place in Los Angeles – Recommendations Needed!

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Hi everyone! I’m planning my child’s upcoming birthday and I’m looking for a fun, safe, and stress-free kid birthday party place in Los Angeles. Ideally, it would be somewhere indoors with activities for...more

Touching EPIC touchscreen when in sleep mode may trigger unintended UI response

Knowledge Base - KB91340 - 1/9/2026

With a typical touchscreen, when you touch a blank screen, the only behavior should be that the screen comes on. However, with this issue, the touch may trigger a UI item located at the spot where you...more

External monitor screen goes blank when selecting different Video Mode

Knowledge Base - KB91067 - 1/9/2026

For a few external monitors, when you select a different video mode (from the groov Manage Home page, select System > Display > Video Mode), the external monitor may not display anything (it may turn black or red).

Groove epic strategy auto/manual mode digital output control

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Looking for advice, Or articles/videos for learning I have a groove epic, running a bin tipper It lifts the bin, rotates it, then elevates it to empty, then reverses the process. Due to the bins being...more

Node-RED flows report errors soon after EPIC/RIO start

Knowledge Base - KB91313 - 12/31/2025

After your groov EPIC or RIO starts up, your Node-RED flows may report errors accessing local services (for example, groov Manage for I/O nodes) because the local services may not have finished starting yet.

Symptoms of communication issues occur for approximately 80 seconds

Knowledge Base - KB91365 - 12/30/2025

You may see symptoms or messages regarding communication issues in the applications accessing PAC Controller's host port for approximately 80 seconds.

Ethernet IP Comm with Node Red and Groov View

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Hi Guys, I am having an issue. I am trying to read and write tags from an AB PLC using Node Red. The issue is that the writting takes effect after pushing deploy in Node Red, even if I have already...more

WiFi SSIDs with space characters may not display in groov Manage, or connection may not restore

Knowledge Base - KB91193 - 12/30/2025

If you connect your groov EPIC or RIO to a wireless network that has an SSID with spaces, groov Manage may not display the SSID name or, if you do a Back and Restore as part of a...more

PAC Display may crash when creating a project archive

Knowledge Base - KB91369 - 1/13/2026

When attempting to create a project archive (.zip file) in PAC Display Configurator (File > Archive Project), PAC Display Configurator may crash.

From Smart Sumps to Smarter Mines

Documents - 2447 - 12/18/2025

View in HTML For underground mines, water control is everything. Trapped water can create real drowning and electrocution hazards for mine personnel, which means the sump pumps used to control water...more

If '@' in password, PAC Control can't connect to FTP server

Knowledge Base - KB91367 - 12/17/2025

In a PAC Control communication handle to a remote FTP server, when you specify a password that contains the @ symbol, the controller cannot log into the FTP server.

Newly created watch window may not appear in list of recently opened watch windows in PAC Control

Knowledge Base - KB91359 - 1/13/2026

After creating a new watch window in Debug mode in PAC Control, the new watch window may not appear in the list of recently opened watch windows at the bottom of the Watch menu.

Kickstarting Your Unified Namespace

Videos - 12/16/2025

Ready to see how easy it can be to unlock OT data and build a Unified Namespace? In this webinar, Cirrus Link and Opto 22 walk through real demos using MQTT, Sparkplug, Ignition, and Snowflake—no...more

PAC Display Configurator program icon may be indistinguishable from PAC Display Runtime program icon in Windows

Knowledge Base - KB91354 - 1/13/2026

The program icon for PAC Display Configurator may appear the same as the program icon for PAC Display Runtime in Windows File Explorer and the Windows Taskbar, making them indistinguishable from each other.

Installing k3s agent with containerd on a groov EPIC PR2 to deploy an Ignition container

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Hello everyone, I am working with a groov EPIC PR2 and I am exploring whether it is possible to install a k3s agent on the device in order to deploy an Ignition container. I am specifically interested...more

Addresses copied from the PAC Manager Inspect window may not paste correctly in the Generic Read/Write page

Knowledge Base - KB91235 - 1/13/2026

In PAC Manager, if you copy an address (like F026 0000) from the Inspect Opto 22 Device window (such as from the Analog Bank page) and paste it into the Address 0x FFFF field on the Generic Read/Write...more

The minus (-) character may not be accepted in the Initial Value field when adding or editing integer or integer table variables in PAC Control

Knowledge Base - KB91360 - 1/13/2026

When adding or editing integer or integer table variables (32-bit and 64-bit) in PAC Control, you may not be able to type a minus (-) character for a negative value into the Initial Value field of the Add Variable or Edit Variable dialog windows.

Add device user codesys

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I have an EPIC-PR1, the last firmware, codesys 3.5 SP21 (32bits), i scan the network, select the controller but no appears de warning message about the user management gos directly to the Device User...more

Strategies modified using the PAC Control CLI may not open in PAC Control

Knowledge Base - KB91320 - 1/13/2026

After modifying a strategy using the PAC Control command-line interface (CLI) and attempting to open that strategy in PAC Control, the strategy may not open.