void setup() {
for(int i=2;i<=13;i++){
pinMode(i,OUTPUT);
}
Serial.begin(9600);
}
void loop() {
int now = analogRead(A0);
//int level = now/(512*2/13);
int level = now/4;
for(int i=2;i<=13;i++)
{
if(i<level)digitalWrite(i, HIGH);
else digitalWrite(i, LOW);
}
Serial.write(level);
delay(20);
//digitalWrite(13, HIGH);
// delay(now);
//digitalWrite(13, LOW);
//delay(now);
}
---------------------------------------------------------------------------------------------------------------------------
Processing
import processing.serial.*;
Serial myPort;
void setup(){
size(765,100);
myPort = new Serial(this,"COM6",9600);
}
int level=0;
void draw(){
background(255);
fill(255,0,0);
rect(0,0,level*3,100);
if(myPort.available()>0){
int now = myPort.read();
level = now;
}
}



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