This page explains the behaviour of the ROOMZ
...
Devices, when failing to connect to the programmed Wi-Fi network
In case of failing to connect to the Wi-Fi network and depending on the version of the Displaydevice's Firmware, here are the current delays before the Display device tries a new connexion.
Example with version 2.1.0: 11:00:00, The displays devices tries to connect to the Wi-Fi, connexion unsuccessful
...
The interval doubles each time, and once reached 30720 seconds (approximately 8h), the Display devices retries then every 30720 seconds (approximately 8 hours).
...