Last note, for any reader: "/sys/devices/platform/acer-wmi/rfkill/state" is not the right file, "/sys/devices/platform/acer-wmi/rfkill/rfkill1/state" is (Carlos sent me a second message with the right path).
Last note, for any reader: "/sys/devices/ platform/ acer-wmi/ rfkill/ state" is not the right file, "/sys/devices/ platform/ acer-wmi/ rfkill/ rfkill1/ state" is (Carlos sent me a second message with the right path).