How can I check the panel and communication module (IP150/+, PCS, Doorbell) firmware versions?

How can I check the panel and communication module (IP150/+, PCS, Doorbell) firmware versions?

The firmware versions can be checked after logging in to the site. Tapping on the menu button and then on the name of the site will open the site details page.
In the site list, long press on the site, then tapping on the "i" (info) icon will present the site details. There you can find the communication module and panel firmware versions.