chu-Test1的詳細介紹

功能介紹

Read the arduino anolog Pin A0

硬件組成

arduino, esp8266

代碼說明

nothing is connected to PinA0, so the value is the floating voltage.

if you send command "play" to it, the beeper will be turned on;

if you send command "stop" to it, the beeper will be turned off.