I was wandering about the WiFi signal spread across my home. So I build a device that display the signal strength using Arduino + WiFi and LCD display.
I know that there are apps for that, but this is more fun. After a long internet search for the correct I2C LCD library, I am using this fdebrabander library: 20X04LCD_Librery. The program will connect to the home network and display signal quality on LCD screen after connection.
*Don't forget to change the network name and password.