KISS FC - 32bit Flight Controller V1.03 KISS FC - 32bit Flight Controller V1.03 Every KISS FC - 32bit Flight Controller has a serial number to prevent fraud or illegal copies. In order for the Flight Controller to work it must be activated by connecting it to the Kiss GUI by clicking on save settings. Once activated Kiss FC will work and function. Note:Without activation Kiss FC won't be able to send a signal protocol to the esc. Without a signal protocol to the esc from the Kiss FC the motors won't work .