// Code to read an analog value and write it to the serial port int val; int inputPin = 0; // Set the input to analog in pin 0 void setup() { Serial.begin(9600); // Start serial communication at 9600 bps } void loop() { val = analogRead(inputPin) / 4; // Read analog input pin, put in range 0 to 255 Serial.print(val, BYTE); // Send the value delay(100); // Wait 100ms for next reading }