/*Serial Communication*/
// global variable named as counter with value 0 
int counter = 0;

void setup() {
// initialized ESP32 UART0 with speed 9600bps 
Serial.begin(115200);
}

void loop() {
// increment variable counter's value by +1 on every loop. 
counter++;
// transmit the variable counter's value to computer
Serial.print("Nilai kiraan: "); 
Serial.println(counter);
// wait for 1 second before next action. 
delay(1000);
}