以下是物联通信-变量方式控制继电器代码,请分析改代码实现的功能是什么? if(strncmp(gUart3_RecvBuf+1,"#var 1",6)==0) { OledClearHalf(2); if(gUart3_RecvBuf[8]=='1') { DATA_IO1 = 1; LED2_ON(); LED3_OFF(); BUZZER_ON(); DelayMs(300); BUZZER_OFF(); OledSprintf(3,1,"开"); } else { DATA_IO1 = 0; LED2_OFF(); LED3_ON(); BUZZER_ON(); DelayMs(100); BUZZER_OFF(); OledSprintf(3,1,"关"); } }