#include <iostream>
#include <stdio.h>
#include <unistd.h>       //read function
#include <string.h>
#include <wiringSerial.h> //simple serial port library

using namespace std;
/*
 * sudo apt-get install libwiringpi-dev
 * This code is working on a x86_64 machine, not a raspberry pi.
 * 
 * compiled with g++ -Wall -o readSerial  readSerial.cpp -lwiringPi
 *
 */
int main(int argc, char ** argv)
{
	const char *SensorPort = "/dev/ttyACM0"; //Serial Device Address
	 
	int levelSensor = serialOpen(SensorPort, 9600);
	//serialPuts(levelSensor, "1"); //Send command to the serial device

	while (1){
		char buffer[100];
		ssize_t length = read(levelSensor, &buffer, sizeof(buffer));
		if (length == -1){
			cerr << "Error reading from serial port" << endl;
			break;
		}
		else if (length == 0){
			cerr << "No more data" << endl;
			break;
		}else{
			buffer[length] = '\0';
			cout << buffer; //Read serial data
		}
	}

	return 0;
}