Fresno.py arduino sketch

cmd.sketch

String incomingByte = "";   // for incoming serial data
bool blinking = false;
int blinkSpeed = 100;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);     // opens serial port, sets data rate to 9600 bps
}

// the loop function runs over and over again forever
void loop() {
    if (Serial.available() > 0) {
      // read the incoming byte:
      incomingByte = Serial.readString();
      
      if (incomingByte == "on") {
        digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(100);                       // wait for a second
        blinking = false;
      }

      if (incomingByte == "off") {
        digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
        delay(100);                       // wait for a second
        blinking = false;
      }

      if (incomingByte == "blink") {
        blinking = true;
      }

      if (incomingByte == "faster") {
        blinkSpeed -= 100;
      }

      if (incomingByte == "slower") {
        blinkSpeed += 100;
      }
    }

    if (blinking == true) {
      digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
      delay(blinkSpeed);                       // wait for a second
      digitalWrite(LED_BUILTIN, LOW);   // turn the LED on (HIGH is the voltage level)
      delay(blinkSpeed);                       // wait for a second
    }
}