I am trying to implement a simple asynchronous communication to a device through a SerialPort.
The communication is through a protocol: I need to send a command then receive the response.
My problem is SerialPort.BaseStream.WriteAsync is just blocking the whole program and I need to reset Unity.
What I am sure about is that the message is getting there (Signal (5 BEEPS) from the device).
I am new to this type of communication and I can’t figure out what I am doing wrong.
Here is my sample code :
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO.Ports;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
public class scr : MonoBehaviour
{
CancellationTokenSource tokenSource = new CancellationTokenSource(1000);
public SerialPort sp;
string command = "BEEP 5\r";
byte[] response;
// Start is called before the first frame update
void Start()
{
response = new byte[200];
Task write = connectAsync();
Debug.Log("readAsync on.");
write.Wait();
var x = write.Status;
Debug.Log("write results:"+x);
}
// Update is called once per frame
void Update()
{
}
public async Task connectAsync()
{
sp = new SerialPort("COM5");
sp.Open();
await sp.BaseStream.WriteAsync(Encoding.ASCII.GetBytes(command), 0, command.Length, tokenSource.Token);
}
}
