Hello everyone,
recently i bought jy-mcu usb to serial adapter for arduino, thinking that i could connect it to my netduino.
but i got some problems. Netduino sends and receives data, but only zeros. When pc sends data to netduino it receives only zeros, it also happend when netduino sends data to the computer.
I think the number of bytes that are send and receives is ok because when i send one letter from pc to netduino, he only receive one byte, when send two letter there are two bytes (two "0"s) and so on....
this is my code for netduino:
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using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;
using System.IO;
using System.IO.Ports;
namespace NetduinoApplication9
{
public class Program
{
static SerialPort port;
public static void Main()
{
// write your code here
port = new SerialPort(SerialPorts.COM1, 9600, Parity.None,8 , StopBits.One);
byte[] txtBuff = System.Text.Encoding.UTF8.GetBytes(t);
port.ReadTimeout = 0;
port.Open();
port.DataReceived += new SerialDataReceivedEventHandler(Data_Received);
OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);
for (int i = 0; i < 3; i++)
{
led.Write(true);
Thread.Sleep(250);
led.Write(false);
Thread.Sleep(250);
}
Thread.Sleep(Timeout.Infinite);
}
static void Data_Received(object sender, SerialDataReceivedEventArgs e)
{
Thread.Sleep(100);
byte[] b = new byte[1];
while (port.BytesToRead > 0)
{
port.Read(b, 0, b.Length);
port.Write(b, 0, b.Length);
}
}
}
}
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and code for pc app:
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
namespace WindowsFormsApplication6
{
public partial class Form1 : Form
{
static SerialPort comport;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
// .Write("LED=1r");
comport.Write("a");
}
private void Form1_Load(object sender, EventArgs e)
{
//com6 = new SerialPort("COM6", 9600, Parity.None, 8, StopBits.One);
comport = new SerialPort("COM6", 9600 , Parity.None, 8, StopBits.One);
comport.Open();
comport.DataReceived += new SerialDataReceivedEventHandler(Data_Received);
}
private void button2_Click(object sender, EventArgs e)
{
comport.Write("LED=0r");
}
private void button3_Click(object sender, EventArgs e)
{
comport.WriteLine("3r");
}
static void Data_Received(object sender, SerialDataReceivedEventArgs e)
{
// wait a little for the buffer to fill
System.Threading.Thread.Sleep(100);
// create an array for the incoming bytes
byte[] bytes = new byte[comport.BytesToRead];
// read the bytes
comport.Read(bytes, 0, bytes.Length);
// convert the bytes into a string
string line = System.Text.Encoding.UTF8.GetString(bytes);
}
}
}
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adapter is connected with netduino like this
adapter netduino
TX RX(D0)
RX TX(D1)
GND GND
there are also 3.3V, VBUS, DTR pins on adapter and i'm not really sure what they mean.
any advice would be appreciated.
Nemanja.
