HTML-> Python CGI->串行端口

Question

I'm attempting to run a python cgi script to send some data to a serial port. 我正在尝试运行python cgi脚本以将一些数据发送到串行端口。 The HTML server crashes when I try open and to set the serial port to a variable. 当我尝试打开并将串行端口设置为变量时，HTML服务器崩溃。 Here is code, it recieves a color from the html page (red,blue,green): 这是代码，它从html页面接收一种颜色（红色，蓝色，绿色）：

    # Import modules for CGI handling 
import cgi, cgitb

# Import Pyserial
import serial

# Set Serial port
ser = serial.Serial('COM3', 9600) #This causes 500 - Internal Server Error

# Create instance of FieldStorage 
form = cgi.FieldStorage() 

# Get data from fields
led = form.getvalue('led_color')

if led == ("red"):
 print "<html>"
 print "<br>"
 print "red/do red script shit"
 print "</html>"

 ser.write('1')

Answer 1

The code does not print HTTP header. 该代码不打印HTTP标头。

Add following lines before write any body. 在写任何正文之前添加以下行。

print 'Content-type: text/html'
print

Simply importing cgitb does not enable the exception handling feature. 简单地导入cgitb不会启用异常处理功能。 Explicitly enable it. 明确启用它。

import cgitb
cgitb.enable()

HTML-> Python CGI->串行端口

问题描述

1 个解决方案

解决方案1
0 2013-12-23 16:17:25

HTML-&gt; Python CGI-&gt;串行端口

问题描述

1 个解决方案

解决方案1 0 2013-12-23 16:17:25

HTML-> Python CGI->串行端口

解决方案1
0 2013-12-23 16:17:25