This example shows you how to read analog input from the physical world using a potentiometer. Apotentiometeris a simple mechanical device that provides a varying amount of resistance when its shaft is turned. By passing voltage through a potentiometer and into an analog input on your board, it...
begin(1000000); // 初始化串口通信 } void loop() { sensorValue = analogRead(analogInPin); // 读取模拟输入的值 float voltage = sensorValue * (5.0 / 1023.0); // 将模拟输入的值转换为电压值 Serial.println(voltage); } 我在另一个开发板上输出一个方波信号逝逝(☆▽☆): 啊,才发现我的ESP...
示例名称为 AnalogReadSerial，专注于串口模拟读取。该示例从针脚 0 读取模拟输入，并将结果打印到串口监视器。若未连接开发板，执行代码会报错。正确连接电位器至针脚 A0，外侧针脚至 +5V 和接地，便能完成示例的硬件搭建。代码示例位于公共域。示例代码分为设置函数（setup）和循环函数（loop）两部分。在...
Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu). Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground. This example code is in the public domain. https://www.arduino.cc/en/Tutorial/BuiltInExamples/ReadAnalogVolta...
int analogPin = 3; // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the pin as output } void loop() { val = analogRead(analogPin); // read the input pin ...
int analogPin = 5;int val = 0;void setup(){Serial.begin(9600);}void loop(){val = analogRead(analogPin);Serial.println(val);}这里还是要实现Matlab的即时读取和画图。Matlab代码如下:s = serial('COM3'); %定义串口对象set(s,'BaudRate',9600); %设置波特率sfopen(s); %打开串口对象sinterval...
This example code is in the public domain. http://www.arduino.cc/en/Tutorial/ReadAnalogVoltage */// the setup routine runs once when you press reset:voidsetup(){// initialize serial communication at 9600 bits per second:Serial.begin(9600);}// the loop routine runs over and over again ...
The circuit: - analog sensor (potentiometer will do) attached to analog input 0 - LED attached from digital pin 9 to ground created 29 Oct 2008 by David A Mellis modified 30 Aug 2011 by Tom Igoe This example code is in the public domain. ...
// put your main code here, to run repeatedly: } 1. 2. 3. 4. 5. 6. 7. 8. 9. 如果你使用过C/C++语言,你会发现Arduino的程序结构与传统的C/C++结构的不同之处就在于Arduino程序中没有main函数 准确说,其实并不是Arduino没有main函数,而是main函数的定义隐藏在了Arduino的核心库文件中。Arduino开...
There are multiple simulation pins on the Arduino board (usually marked as A0-A5), which can be used to read analog signals.以下是一个简单的Arduino示例，演示如何使用模拟引脚读取来自某个传感器的输入：The following is a simple Arduino example. Demonstration of how to use analog pins to read the...