my security camera and my thermostat lost wi fi this happens more and more whats the cause and what can i do to prevent it happenning
Welcome to this user forum.
It could be poor wireless signal, wireless interference, or a problem with the home hub.
Try a factory reset of the home hub.
Then turn off smart setup.
I assume you have a home hub 6?
Is there an option on the devices, to connect using an Ethernet cable instead?
Also split the networks.