我开发了一个应用程序,它通过套接字将字符串/命令发送到另一个PC应用服务器,并通过串口将字符串发送到Arduino .
The problem is: how can I send bytes to Arduino?
通过串口发送String的应用服务器的C#:
using System;
using System.Windows.Forms;
using System.Threading;
using System.IO;
using System.IO.Ports;
public class senddata
{
private void Form1_Load(object sender, System.EventArgs e)
{
// Define a Porta Serial
serialPort1.PortName = textBox2.Text;
serialPort1.BaudRate = 9600;
serialPort1.Open();
}
private void button1_Click(object sender, System.EventArgs e)
{
serialPort1.Write("1"); // 1 is a String
}
}
在Arduino上运行的C代码:
#include <Servo.h>
Servo servo;
int pos;
void setup()
{
servo.attach(9);
Serial.begin(9600);
pinMode(13, OUTPUT);
}
void loop()
{
if (Serial.available()) {
int msg = Serial.read();
if (msg > 0) {
servo.write(msg); // 10 = pos 1 10-9 = 1
}
}
}
为了更好地理解这个问题,我将代码改为此(但是,因为 Servo 的值从0变为180,这不起作用):
#include <Servo.h>
Servo servo;
int pos;
void setup()
{
servo.attach(9);
Serial.begin(9600);
pinMode(13, OUTPUT);
}
void loop()
{
if (Serial.available()) {
int cmd = Serial.read();
if (cmd > 0) {
// If I send a 1 the LED stays ON...
// but when a send 12 the LED doesn't stay OFF.
if (cmd == '1') {
digitalWrite(13,HIGH);
}
if (cmd == '12') {
digitalWrite(13,LOW);
}
}
}
}
2 回答
您应该能够使用原始的Arduino代码,但将C#代码更改为:
您希望将字符串的值转换为C中的整数 . 因此,请使用atoi函数 .