从Arduino返回PHP串口数据-php问题

PHP serial port data return from Arduino(从Arduino返回PHP串口数据)

本文介绍了从Arduino返回PHP串口数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想知道是否有办法通过 PHP 完成读取我的串行端口 - 可行:-)

I wonder if there is a way to accomplish reading my serial port via PHP - that works :-)

在练习我的 Arduino 技能时，我开发了一个简单的 LED 开/关草图.它通过在串行监视器中输入 on 或 off 来工作.

In practising my Arduino skills, I developed a simple LED ON/OFF sketch. It works by entering on or off in the serial monitor.

下一步，我整理了一个网页作为GUI界面来点击链接并执行上面的开关功能.这个基于 Web 的 GUI 通过 PHP 工作.我正在使用 PHP SERIAL 类与我的 Arduino 使用的串行端口进行交互.

Next step, I put together a webpage to act as an GUI interface to click a link and perform the on and off function above. This webbased GUI works via PHP. I am using the PHP SERIAL class to interact with the serial port my Arduino is using.

问题是我需要找到一种从串口获取反馈的方法.使用 Arduino IDE 串行监视器，我可以看到响应每个串行输入的打印消息，并且我需要在我的 PHP 代码中检索相同的反馈.

PHP Serial 类提供了一个 readPort() 函数，但我没有返回我的数据.

The PHP Serial class offers a readPort() function but I does not return my data.

更新[2]:

阿杜诺:

const int greenPin = 2;
const int bluePin = 3;
const int redPin = 4;

int currentPin = 0; //current pin to be faded
int brightness = 0; //current brightness level

void setup(){
  Serial.begin(9600);

  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(redPin, OUTPUT);
}

void loop(){
  //if there's any serial data in the buffer, read a byte
  if( Serial.available() > 0 ){
    int inByte = Serial.read();

      //respond only to the values 'r', 'g', 'b', or '0' through '9'
      if(inByte == 'r')
        currentPin = redPin;

      if(inByte == 'g')
        currentPin = greenPin;

      if(inByte == 'b')
        currentPin = bluePin;

      if(inByte >= '0' && inByte <= '9'){
        //map the incoming byte value to the range of the analogRead() command
        brightness = map(inByte, '0', '9', 0, 255);
        //set the current pin to the current brightness:
        analogWrite(currentPin, brightness);
      }

      Serial.print("Current Pin : ");
      Serial.println(currentPin);

      Serial.print("Brightness : ");
      Serial.println(brightness);

  }//close serial check

}

PHP/HTML:

<?php
    require("php_serial.class.php");
// include("php_serial.class.php");

    // Let's start the class
    $serial = new phpSerial();

    // First we must specify the device. This works on both Linux and Windows (if
    // your Linux serial device is /dev/ttyS0 for COM1, etc.)
    $serial->deviceSet("/dev/ttyACM0");

    // Set for 9600-8-N-1 (no flow control)
    $serial->confBaudRate(9600); //Baud rate: 9600
    $serial->confParity("none");  //Parity (this is the "N" in "8-N-1")
    $serial->confCharacterLength(8); //Character length     (this is the "8" in "8-N-1")
    $serial->confStopBits(1);  //Stop bits (this is the "1" in "8-N-1")
    $serial->confFlowControl("none");

    // Then we need to open it
    $serial->deviceOpen();

    // Read data
    $read = $serial->readPort();
print "<pre>";
print_r($read);
print "</pre>";

    // Print out the data
    echo $read;
        // print exec("echo 'r9g9b9' > /dev/ttyACM0");
    print "RESPONSE(1): {$read}<br><br>";

    // If you want to change the configuration, the device must be closed.
    $serial->deviceClose();
?>

<?php
    if( isset($_REQUEST['LED']) )
        response();
?>

<form action='index.php' method='POST'>
    <select id='led' name='LED'>
        <option id='nil'>-</option>
        <option id='red'>RED</option>
        <option id='green'>GREEN</option>
        <option id='blue'>BLUE</option>
        <option id='all'>ALL</option>
    </select>
    <input type='submit' value='SET'>
</form>

<?php
    print "Hi, Earthlings!";

    function response(){
        $CMDString = "";
        $execute   = false;

        if( isset($_REQUEST['LED']) ){
                switch ($_REQUEST['LED']) {
                    case 'RED':
                        $CMDString = 'r9';
                        $execute = true;

        exec("echo 'r9g0b0' > /dev/ttyACM0");

                print "<br>FOUND: {$_REQUEST['LED']}";
                        break;
                    case 'GREEN':
                        $CMDString = 'g9';
                        $execute = true;
                print "<br>FOUND: {$_REQUEST['LED']}";
                        break;
                    case 'BLUE':
                        $CMDString = 'b9';
                        $execute = true;
                print "<br>FOUND: {$_REQUEST['LED']}";
                        break;
                    case 'ALL':
                        $CMDString = 'r9g9b9';
                        $execute = true;
                print "<br>FOUND: {$_REQUEST['LED']}";
                        break;
                    default:
                        print exec("echo 'r0g0b0' > /dev/ttyACM0");
                        $execute = false;
                        break;
                }

                if($execute){
                    print exec("echo '{$CMDString}' > /dev/ttyACM0");
                    print "<br><br>executing: {$CMDString}";
                }
        }
    }
?>

推荐答案

我假设你在 linux 上工作.

I assume you work on linux.

首先设置你的串口:

stty -F /dev/ttyACM0 cs8 9600 ignbrk -brkint -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts

那么你就可以使用老式的 fread/fwrite

Then you can use good old fashion fread/fwrite

$fp =fopen("/dev/ttyACM0", "w+");
if( !$fp) {
        echo "Error";die();
}

fwrite($fp, $_SERVER['argv'][1] . 0x00);
echo fread($fp, 10);

fclose($fp);

你只需要记住一件事.Arduino 将在每次连接时重新启动.如果你不知道它会让你感到困惑.例如，如果您连接(fopen)并立即发送数据，Arduino 会因为它正在启动而错过它(这需要一两秒).尝试睡眠，给它一些时间.如果要禁用重启，请在 GRD 到 RST 之间使用 10uF 电容.

There is only one thing you have to remember. Arduino will restart on every connection. If you don't know that It will confuse you. For instance if you connect (fopen) and instantly send data Arduino will miss it because it's booting (which takes a sec or two). Experiment with sleep to give it some time. If you want to disable restarting use 10uF capacitor from GRD to RST.

祝你好运

ps.您可以使用屏幕"进行故障排除

ps. you can troubleshoot with "screen"

screen /dev/ttyACM0 9600

发布关于使用 Arduino 设置 PHP http://systemsarchitect.net/connecting-php-with-arduino-via-serial-port-on-linux/ 和另外一个 http://systemsarchitect.net/arduino-and-php-serial-communication-with-a-protocol/.

Post about setting PHP with Arduino http://systemsarchitect.net/connecting-php-with-arduino-via-serial-port-on-linux/ and one more here http://systemsarchitect.net/arduino-and-php-serial-communication-with-a-protocol/.

这篇关于从Arduino返回PHP串口数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！