global_variatestring_keyStringglobal_variatechar_keycharaglobal_variatekey_dataString123ABCKEYPAD_4_423456789123A456B789C*0#Dchar_keyKEYPAD_4_4char_keystring_keyHellostring_keyMixlychar_keySerialprintlnstring_keyEQhellostring_key6EQstring_keykey_dataSerialprintlnkey is trueSerialprintlnSerialprintlnkey is falseSerialprintlnstring_key