Raspberry pi didn't have built in WiFi until raspberry pi 3 in 2016 (of course you could use a usb adapter). I think around similar time esp 8266 (cheap microco

Raspberry pi didn't have built in WiFi until raspberry pi 3 in 2016 (of course you could use a usb adapter). I think around similar time esp 8266 (cheap microcontroller with WiFi) started becoming popular