I have just discovered that if I have set the hidden: true parameter for the network, ESPHome will not connect if it isn’t hidden (I was replacing the AP and changing the network configuration).
Is this by design to meet a specification somewhere or is it a bug?
Once the AP was set to hidden, the devices connected even without the fast_connect parameter being set 
Not tried the hidden parameter. I connect to a hidden SSID with just “fast_connect: true” did you try that?
No, I didn’t. Interesting that it connected to a hidden SSID without the hidden parameter!
Hi …
How can I set the „fast-connect“ in a HA yaml code ?
Thanks for you’re help.
@WoWu
Example:
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
fast_connect: true # Optional. Required if connecting to a hidden SSID
You know how to go to the esphome.io website and use a search box right? You could type “fast connect” in rhe search box and that will take you to where it explains it and how to set it.