Hello Thomas
We think we were able to answer your question yesterday. Nevertheless, we would like to briefly clarify it again here, in case other users have a question about it: The Wi-Fi connection should be available where the charging station is located. The data will be transmitted when Braava is able to reconnect to the Wi-Fi. So you can leave it running on other floors and also create more maps for a short time without a Wi-Fi connection, but these will only be transmitted to the app as soon as there is a Wi-Fi connection. It is not possible to connect Braava to multiple wifi networks.
Best regards,
Your iRobot Team

You cannot add an additional WLAN.
However, it can also clean without WLAN, in which case no push messages are transmitted.