Question

此代码用于读取电位器并将值打印到arduino串行监视器但即使你不移动底池，你也会获得价值。

只有在移动电位计时，我需要更改代码才能获取值？

 void setup() {
 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);
 }

 // the loop routine runs over and over again forever:
 void loop() {
 // read the input on analog pin 0:
 int sensorValue = analogRead(A0);
 // print out the value you read:
 Serial.println(sensorValue);
 delay(1);        // delay in between reads for stability
 }

Answer 1

int oldValue = 0; 
void setup() {
 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);
 }

 // the loop routine runs over and over again forever:
 void loop() {
 // read the input on analog pin 0:
 int sensorValue = analogRead(A0);
 // print out the value you read:

if (sensorValue  != oldValue){
 Serial.println(sensorValue);
 oldValue = sensorValue;
}
 delay(1);        // delay in between reads for stability
 }

您需要使用变量来保存旧值并将其与新读数进行比较。如果它们不同则打印新值并更新旧值

如何移动锅时如何读取arduino串口监视器的锅值？

1 个答案: