int sensorValue = analogRead(A0);:读取模拟引脚A0的值。analogRead()函数返回一个0到1023之间的整数,表示输入电压的相对值。 例如,当A0引脚的电压为0V时,返回0;当电压为5V时,返回1023。 float voltage = sensorValue * (5.0 / 1023.0);:将读取到的模拟值转换为实际的电压值。公式如下: voltage=sensorValue...
在模拟输入引脚没有任何连接的情况下,用analogRead()指令读取该引脚,这时获得的返回值为不固定的数值(用于生成随机数)。 代码(在示例里): /* ReadAnalogVoltage Reads an analog input on pin 0, converts it to voltage, and prints the result to the Serial Monitor. Graphical representation is available us...
This example shows you how to read an analog input on analog pin 0, convert the values from analogRead() into voltage, and print it out to the serial monitor of the Arduino Software (IDE). 本例展示了怎样从模拟输入针脚 0 读取,转换从 analogRead 读取值为电压,并打印结果到 Arduino 软件(IDE)...
}//the loop routine runs over and over again forever:voidloop() {//read the input on analog pin 0:intsensorValue =analogRead(A0);//Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):floatvoltage = sensorValue * (5.0/1023.0);//print out the value you r...
int sensorValue = analogRead(A0); 为了使从0-1023的值对应到读取到的电压值,你需要创建另外一个浮数的变量,然后做一些运算: float voltage= sensorValue * (5.0 / 1023.0); 最后,你需要打印这个电压值到你的串口窗口里。你可以用Serial.println()命令来完成这个步骤: ...
int analogvalue = analogRead(A0); temp = (analogvalue * 5.0) / 1024.0; // FORMULA USED TO CONVERT THE VOLTAGE input_volt = temp / (r2/(r1+r2)); 在这里,我们在Arduino的LCD和串行监视器上显示了测量的电压值。因此,在代码中,Serial.println用于在串行监视器上打印值,lcd.print用于在16x2 LCD上...
m=analogRead(A0);// read analog values from pin A0 across capacitor n=(m* .304177);// converts analog value(x) into input ac supply value using this formula ( explained in woeking section) Serial.print(" analaog input " ) ; // specify name to the corresponding value to be printed...
In this example, we use the value of the sensor connected to the A0 pin with the `Analogread ()` function. `ANALOGREAD ()` function returns an integer value between 0 and 1023, indicating the voltage on the simulation pin. Then, we use the `map ()` function to convert this value ...
void setup(){ Serial.begin(115200); pinMode(PA0, INPUT_ANALOG);}void loop(){ delay(50); Serial.print("PA0="); Serial.println(analogRead(PA0));} 3）串口资源 总共3个硬件外接串口Serial1、Serial2、Serial3，一个USB虚拟串口Serial，测试代码示例：void setup(){ Serial.begin(115200...
AnalogReadSerial- 读取电位器, 并把它的状态输出到 Arduino 串口窗口 BareMinimum- 编写一个 Arduino 代码的必要代码块 DigitalReadSerial- 读取一个按键, 并把它的状态输出到 Arduino 串口窗口 Fade- 示范使用模拟输出使 LED 变暗. ReadAnalogVoltage- 读取模拟输入,并把电压输出到 Arduino 串口窗口 ...