Yes, it can also be accessed offline. I have them in a basement room without wifi. You can activate a HotSpot mode so that the Nanoleafs generate their own network. You can connect to this and control the Nanoleafs. Once the scenes are on the controller, they are stored locally and can be accessed without the internet. At first, I could not download interactive game scenes and send them to the controller. But there was a solution to this. I had to take a Nanoleaf incl. controller and power supply unit with me into the flat where there is wifi, connect this setup to the house wifi, then I could download interactive games and send them to the controller. I could then bring the controller/network unit/Nanoleaf back to the basement and put it into HotSpot mode and all the scenes were still there. I had received this tip from Nanoleaf support (I asked them a question under a YouTube video and received an answer). If you make small mistakes somewhere in the operation, it's enough to make your hair stand on end and you can easily spend hours setting it up without getting any further...
