package application;

import jssc.SerialPort;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import jssc.SerialPortException;

import java.io.IOException;

public class SerialReader {
	static SerialPort serialPort;
	static double temp;

	public static double getTemp() {
		return temp;
	}

	public static void Listener() {

		try {
			serialPort = new SerialPort("COM3");

			serialPort.openPort();

			// Låt stå eller är redan satt i enhetshanteraren?
			serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
					SerialPort.PARITY_NONE);

			serialPort.addEventListener(new PortReader(), SerialPort.MASK_RXCHAR);

		} catch (SerialPortException ex) {
			System.out.println("There is an error here " + ex);
		}

	}

	private static class PortReader implements SerialPortEventListener {

		@Override
		public void serialEvent(SerialPortEvent event) {
			if (event.isRXCHAR() && event.getEventValue() > 0) {
				try {
					
					int[] receivedData = serialPort.readIntArray(event.getEventValue());
					
					if (receivedData.length == 2) {
						System.out.println(receivedData[0] + " " + receivedData[1]);
						int temp1 = (receivedData[0] << 8) + receivedData[1]; // read
						System.out.println(temp1);
																				// serial
																				// port
						temp = 5 * (double) temp1 / 1023; // Converts AD value to voltage
						temp = temp * 100 - 273.0; // Voltage is 100*equal to
													// temp in kelvin, convert
													// to celsius
						System.out.println("Received response: " + temp + " " + receivedData.length);
					} else {
						System.out.println("fail");
					}

				} catch (SerialPortException ex) {
					System.out.println("Error in receiving string from COM-port: " + ex);
				}
			}

		}

	}

}