WiFi QR codes: the five escapes, the all-hex SSID trap, and what ECC level H costs you

The payload behind a "join this network" QR code is a single line of text: WIFI:T:WPA;S:cafe-wifi;P:p@ssw0rd;; Worth knowing up front: this is not an official standard. It is the convention ZXing introduced, which the early Android scanners shipped with, and which everything else then matched. There is no RFC to point at when something disagrees.... Weiterlesen