IIC通信:当接收到YES时点亮D13，当打开NO时熄灭D13\n\nUNO1(A4)-UNO2(A4)\nUNO1(A5)-UNO2(A5)\nUNO1(GND)-UNO2(GND)global_variatetransmitStringString4ONdelay10004OFFdelay1000requesttransmitStringdelay1043WHILETRUE+itemtransmitString1charEQhellotransmitString0NtransmitStringsubstringtransmitString02SerialprintlntransmitStringEQtransmitStringOK13HIGH13LOW