# PLC IDE and Arduino OPTA - cannot connect **URL:** \ **Category:** PLC IDE\ **Created:** [June 18, 2024, 11:20am UTC](https://forum.arduino.cc/t/plc-ide-and-arduino-opta-cannot-connect/1273017 "2024-06-18T11:20:51Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![floow1705](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/floow1705/32/1252838_2.png) [@floow1705](https://forum.arduino.cc/u/floow1705)\ **Post date:** [December 28, 2025, 9:14pm UTC](https://forum.arduino.cc/t/plc-ide-and-arduino-opta-cannot-connect/1273017/9 "2025-12-28T21:14:06Z")
ins this case, that could help! > [@Arduino PLC IDE Freezes when Connecting to Opta](https://forum.arduino.cc/t/arduino-plc-ide-freezes-when-connecting-to-opta/1168413/23): > > I hope this finds everyone sane, I nearly lost my mind trying to resolve this issue. I was able to fix it by going to: and downloading and running the Opta Factory Reset tool: [https://opta.findernet.com/download/OPTA%20Arduino%20Factory%20Reset\_1.0.0\_x64-setup.exe](https://opta.findernet.com/download/OPTA%20Arduino%20Factory%20Reset_1.0.0_x64-setup.exe) Then downloading Arduino PLC IDE 1.0.85 from: [https://opta.findernet.com/download/Arduino-PLC-IDE-Installer\_1.0.8\_Windows\_64bit.exe](https://opta.findernet.com/download/Arduino-PLC-IDE-Installer_1.0.8_Windows_64bit.exe) I am not sure where the underlying issue was, but this resolved 4 days of beating my head agains… --- _[View the full topic](https://forum.arduino.cc/t/plc-ide-and-arduino-opta-cannot-connect/1273017)._