Week 8# - Journal

This week's assignment is to build and program a smart device using an Arduino UNO that is controlled by Phone or PC

I wanted to use RGB LED and servo motor to simulate a smart gate system. The servo motor is responsible for opening and closing the gate wirelessly, while the RGB LED visually indicates the state of the gate. 

For example, when the gate is opening, the red LED will light up, and when the gate is fully open, the Blue LED will light up. If the gate is closed, the LEDs will be off, signaling that the gate is inactive.

The RGB LED was likely blinking, after some searching i figured out that the Serial.read() function reads only one character at a time, and each time the loop runs, the input is processed very quickly. 

 the solution is to store the last valid input in a variable and only change the LED state when new data is received.

For example 

void loop() {

  if (Serial.available() > 0) {

  long incomingData = Serial.read(); // that part where we store data

   if (incomingData == '1') {

      digitalWrite(red, HIGH);         

      digitalWrite(green, LOW);   

      digitalWrite(blue, LOW);

      myServo.write(140);     

    }