#define led01 23
#define led02 22
#define led03 21
#define led04 19
#define led05 18
#define led06 5
#define led07 17
#define led08 16

byte dt_Serial;

void setup() {
  Serial.begin(115200);

  pinMode(led01, OUTPUT);
  pinMode(led02, OUTPUT);
  pinMode(led03, OUTPUT);
  pinMode(led04, OUTPUT);
  pinMode(led05, OUTPUT);
  pinMode(led06, OUTPUT);
  pinMode(led07, OUTPUT);
  pinMode(led08, OUTPUT);

  digitalWrite(led01, HIGH);
  digitalWrite(led02, HIGH);
  digitalWrite(led03, HIGH);
  digitalWrite(led04, HIGH);
  digitalWrite(led05, HIGH);
  digitalWrite(led06, HIGH);
  digitalWrite(led07, HIGH);
  digitalWrite(led08, HIGH);
}

void loop() {  
  
  byte brightness;

  // check if data has been sent from the computer:
  if (Serial.available()) {
    // read the most recent byte (which will be from 0 to 255):
    brightness = Serial.read();
    // set the brightness of the LED:
    analogWrite(led01, brightness);
  }
}