Qolsys IQ Panel 2 Plus: Solving S2 Protocol Issues

In this video, Michael from Alarm Grid gives you troubleshooting tips for getting Z-Wave Plus devices that support the S2 Security Protocol feature to work properly on the Qolsys IQ Panel 2 Plus. The term S2 in this case refers to a security protocol that is an upgrade over the older S0 protocol. Having top-of-the-line security for smart home automation devices isn't necessarily as important as it is for security sensors, but many users will still want to make their smart home devices secure as possible regardless. By getting S2 devices to work properly using the protocol, you can have a more secure home automation network. Some users will resort to "downgrading" these S2-compatible devices to use the S0 protocol for the sole purpose of getting them to enroll with the system successfully. But there are a few things you can check to get your S2 Z-Wave Plus devices to work as intended on the Qolsys IQ Panel 2.

In order for your Qolsys IQ Panel 2 to support the S2 Security Protocol, it must have a Z-Wave Firmware Version of 6.81.03. This was the Z-Wave Firmware Update that introduced the S2 Security Protocol to the IQ2, as well as the system's Smart Start feature. Additionally, the system firmware, which is separate from the Z-Wave firmware, should be at least 2.5.3. Although Firmware Version 2.4.2 was technically the first to support the S2 Protocol, Firmware Version 2.5.3 brought many fixes to help ensure that S2 devices would work as intended. Therefore, upgrading to System Firmware Version 2.5.3 is strongly advised. You can upgrade the system firmware and the Z-Wave firmware in either order. It doesn't matter which one you do first. Upon enrolling a compatible S2 device, you should get a checkbox for S2 Unauthenticated. You want to have that box checked to enroll the Z-Wave Plus device using the S2 Protocol.

https://www.alarmgrid.com/faq/why-isn-t-my-s2-z-wave-device-working-with-my-qolsys-iq-panel-2

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