Some IoT / smart home products will only connect to the 2.4 GHz frequency band, and this causes problems when connecting to mesh Wi-Fi networks that use a single network name (SSID).
Mill heaters come with a built-in Wi-Fi adapter that allows them to be managed using the mobile app Millheat. This adapter only supports the 2.4 GHz frequency band and the 802.11b/g/n Wi-Fi standards..
This causes issues when connecting to mesh Wi-Fi networks, which primarily use the newer standard 802.11ac. If the mobile phone that runs the Millheat app is connected to the 5 GHz network, adding a Mill heater to the same network may not be possible.*
One workaround for this this is to temporarily disable the mesh network. If you have a mesh network from AirTies, follow the steps below to install a Mill heater using the Millheat app.
Turn off all AirTies access points except the one you have connected to your router by Ethernet cable. If you have a regular AirTies home pack, this means that two access points should be turned off. The power button is located on the back of each device.
Now you can turn on all the AirTies devices again, and the mesh network will work as before. Remember that AirTies device startup takes a few minutes.
Tested with Millheat app version 3.2.6.