我想知道是否有一种方法可以通过PHP读取我的串口 - 而且是行得通的 :-)
在练习我的Arduino技能时，我开发了一个简单的LED开/关程序。 它通过在串行监视器中输入 on 或 off 来工作。
下一步，我创建了一个网页作为GUI界面，通过点击链接执行上述开和关的功能。这个基于Web的GUI通过PHP工作。 我正在使用PHP SERIAL类与我的Arduino所使用的串口进行交互。
问题在于我需要找到一种从串口获得反馈的方法。使用Arduino IDE串行监视器，我可以看到我的打印消息响应每个串行输入，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，但它不返回我的数据。
更新[2]：
ARDUINO：
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/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}";
}
}
}
?>