I’ve spent a little time integrating the Netgear node_module into OpenHAB via the Exec Binding to allow control of the routers guest network from OpenHAB. I mainly use this to turn on/off the network to manage internet access for our kids. This can be done either manually via UI or via a timer (eg. 30 mins from now).
I’ve published it as an NPM package here - readme should have everything you need to replicate.
Hope someone finds it useful. More here: https://www.npmjs.com/package/openhab-netgear