Tasker: If variable - not connected to Wifi

You're going about this the wrong way.

Go to Profiles → (New profile) → State → Net → Wifi Connected. Leave SSID blank and tick "Invert". Link this profile to a task which changes brightness.

Edit - Okay, I think I've found the solution. In the task which changes brightness, do this:

1. Wait for 5 seconds


2. if %WIFII (matches regex) \bSCAN\b
   
   
   
   
   • (Increase brightness)
   
   

Explanation: The %WIFII (WiFi info) variable not only gives the name of the WiFi that you are connected to, but also miscellanous information such as Mac and IP address and contains the phrase ">>> CONNECTED <<<". If you are not connected to any particular WiFi, it lists all of the WiFis available along with the phrase ">>> SCAN <<<".

The above task basically

1. Waits for 5 seconds (adjust accordingly!)


2. Checks if the %WIFII variable contains the word "SCAN" by means of a regular expression
   
   
   
   
   • If it contains "SCAN" it means that the device is NOT connected to a specific WiFi (if was connected, it would have the word "CONNECTED" in it).
   
   


3. Increases brightness accordingly

Note: Might cause problems if there are WiFis with the word "SCAN" in them! You can always change the if condition to something else such as if %WIFII (doesn't match regex) \bCONNECTION\b, or make it more specific for the phrase ">>> SCAN <<<" (I'm still new to regular expressions so I've no idea how to do it).