使用蓝牙将 ASCII 从 C# 发送到 Arduino [英] Sending ASCII from C# to Arduino using Bluetooth

问题描述

我正在尝试将我的 C# Windows Forms 应用程序从我的笔记本电脑连接到 Arduino Duemilanove.蓝牙模块连接到 Arduino 上的 Tx 和 Rx 引脚.我的目标是在我输入字母a"时点亮板载 LED，但到目前为止还没有成功.我确定蓝牙已与我的笔记本电脑连接，但它没有响应我按下的字母.

I am trying to interface my C# Windows Forms application from my laptop to the Arduino Duemilanove. A Bluetooth module is connected to the Tx and Rx pins on the Arduino. My goal is to light up the on-board LED when I type in the letter 'a' and so far it has been unsuccessful. I am sure the Bluetooth is connected with my laptop, but it is not responding to the letter I am pressing.

public partial class Form1 : Form
{
    private Guid service = BluetoothService.SerialPort;
    private BluetoothClient bluetoothClient;

    public Form1()
    {
        InitializeComponent();

        this.KeyPreview = true;
        this.KeyPress += new KeyPressEventHandler(Form1_KeyPress);
    }

    void Form1_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyChar == 'a')
        {
            Stream peerStream = bluetoothClient.GetStream();
            Byte[] buffer = Encoding.ASCII.GetBytes("a");
            peerStream.Write(buffer, 0, buffer.Length);
        }
    }

    private void search_Click(object sender, EventArgs e)
    {
        BluetoothRadio.PrimaryRadio.Mode = RadioMode.Discoverable;
        BluetoothRadio myRadio = BluetoothRadio.PrimaryRadio;
        bluetoothClient = new BluetoothClient();
        Cursor.Current = Cursors.WaitCursor;
        BluetoothDeviceInfo[] bluetoothDeviceInfo = { };
        bluetoothDeviceInfo = bluetoothClient.DiscoverDevices(10);
        comboBox1.DataSource = bluetoothDeviceInfo;
        comboBox1.DisplayMember = "DeviceName";
        comboBox1.ValueMember = "DeviceAddress";
        comboBox1.Focus();
        Cursor.Current = Cursors.Default;
    }

    private void Connect_Click(object sender, EventArgs e)
    {
        if (comboBox1.SelectedValue != null)
        {
            try
            {
                bluetoothClient.Connect(new BluetoothEndPoint((BluetoothAddress)comboBox1.SelectedValue, service));
                MessageBox.Show("Connected");

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}

Arduino 代码

int incomingByte = 0;   // For incoming serial data
void setup()
{
    pinMode(13, OUTPUT); // On-board LED as output
    Serial.begin(9600);     // Opens serial port, sets data rate to 9600 bit/s.
}

void loop()
{
    if (Serial.available() > 0)
    {
        // Read the incoming byte:
        incomingByte = Serial.read();

        if (incomingByte == 'a')
            digitalWrite(13, HIGH);
    }
}

我是否错误地发送了 ASCII 代码或我遗漏了什么?

Am I sending the ASCII code wrongly or what am I missing?

推荐答案

可能和我在这里回答的问题一样.

May be the same issue as I answered here.

我最近涉足了这个.Arduino 会自动重置接收来自除 Arduino 以外的大多数事物的串行通信集成开发环境.这就是为什么您可以从 IDE 发送但不能从 node.js 发送.

I recently dabbled into this. The Arduino automatically resets when it receives serial communication from most things other than the Arduino IDE. This is why you can send from the IDE but not node.js.

我有一个 Uno，并在 Reset 和 Ground 之间放了一个电容.这是一个页面上有一些关于这个主题的好信息.祝你好运.http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection

I have an Uno and put a capacitor between Reset and Ground.Here's a page with some good info on the subject. Good luck. http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection

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