描述：lcd1602显示 遥控键器，lcd1602显示 遥控器接p3.2，喇叭接p1.5 继电p1.4 17(40h)键按下，继电器吸合。19(04h)键按下，继电器关闭。连接方法：使用红外功能时 J1跳线短接-Descr iption: lcd1602 display remote control key device, lcd1602 show remote access p3.2, p1.5 speaker then relay p1.4 17 (40h) key is pressed and relay. 19 (04h) key is pressed, the relay closed. Connection methods: using infrared feature short the jumper J1