Re: [Tutor] Python Arduino Web Page
Engineering wrote:
snip
o:idmap v:ext=edit data=1 /
/o:shapelayout/xml![endif]--/headbody lang=EN-IN link=blue
vlink=purplediv class=WordSection1p class=MsoNormalI have written the
following code in Python for my Arduinoo:p/o:p/pp
class=MsoNormalo:pnbsp;/o:p/pp
class=MsoNormal#!c:\Python27\Python.exeo:p/o:p/pp
class=MsoNormalimport cgi, cgitb;o:p/o:p/pp class=MsoNormalimport
sys, serialo:p/o:p/pp class=MsoNormalcgitb.enable()o:p/o:p/pp
class=MsoNormalser = serial.Serial('COM27', 9600)o:p/o:p/pp
class=MsoNormalmyvar = ser.readline()o:p/o:p/pp class=MsoNormalprint
quot;Content-type:text/html\n\nquot;o:p/o:p/pp class=MsoNormalprint
quot;quot;quot;o:p/o:p/pp
class=MsoNormallt;htmlgt;o:p/o:p/pp
class=MsoNormallt;headgt;o:p/o:p/pp
class=MsoNormallt;titlegt;o:p/o:p/pp class=MsoNormalReal Time
Temperatureo:p/o:p/pp class=MsoNormallt;/titlegt;o:p/o:p/pp
class=MsoNormalnbsp; lt;script type=quot
;text/j
It's pretty hard to interpret that html message. Please post using text
messages, as it's both more compact and less likely to be misinterpreted
by the (text) mailing list mechanisms.
You fetch a value from the serial port in Python called myvar. However,
the javascript code cannot see that value unless you stuff it into the
generated script. The easiest place to stuff it would be on the line:
div id=mine/div
by doing something like
div id=mineTemperature=%d/div
and at the end of the code, changing the final triple quote to:
% myvar
That way the generated html has the string already substituted.
If this is just a (somewhat) simplified version of something that
*needs* javascript, then consider stuffing an assignment statement in
the startinterval() function. However, I can't see as you actually
pass it to startTime() anyway, so the javascript ought to be blowing up
with a missing argument.
Clearly I don't know enough javascript to get out of the mud, so if your
real code is more complex, somebody else will have to help you figure
where to change it.
As for seeing the javascript code separately, one approach is to use
your browser to view the source html. Another is to use wget to just
fetch the page.
--
DaveA
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[Tutor] Python Arduino
Dear All
I have designed a small program to control an arduino through python socket
server. The front end is the Javaquery. My HTML code is given below
$(function() {
$( #slider ).slider({
min: 0,
max: 180,
step: 10,
slide: function( event, ui ) {
$( #amount ).val( $ + ui.value );
}
});
$( #amount ).val( $ + $( #slider ).slider( value ) );
});
My python websocket code is given below
from twisted.internet import reactor
print Using Twisted reactor, reactor.__class__
print
from twisted.python import usage, log
from twisted.protocols.basic import LineReceiver
from twisted.internet.serialport import SerialPort
from twisted.web.server import Site
from twisted.web.static import File
from autobahn.websocket import listenWS
from autobahn.wamp import WampServerFactory, WampServerProtocol, exportRpc
class Serial2WsOptions(usage.Options):
optParameters = [
['baudrate', 'b', 9600, 'Serial baudrate'],
['port', 'p', 26, 'Serial port to use'],
['webport', 'w', 8080, 'Web port to use for embedded Web server'],
['wsurl', 's', ws://localhost:9000, 'WebSocket port to use for
embedded WebSocket server']
]
Can you please help me with the python code . I want the server to write
string which will be sent to the arduino digital pin to control the servo.
The arduino can have the following in its code
if(!Serial.available())
{
// convert String to int.
int recievedVal = stringToInt();
//analogWrite(servoPin,recievedVal);
recievedVal = map(recievedVal,0,179,0,179);
webcam.write(recievedVal);
delay(15);
pwmComplete = false;
}
Python side coding help is required
CLEANTECH SOLUTION
www.cleantechsolution.in
SAVE PAPER , SAVE EARTH
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[Tutor] Python Arduino Web Page
I have written the following code in Python for my Arduino
#!c:\Python27\Python.exe
import cgi, cgitb;
import sys, serial
cgitb.enable()
ser = serial.Serial('COM27', 9600)
myvar = ser.readline()
print Content-type:text/html\n\n
print
html
head
title
Real Time Temperature
/title
script type=text/javascript
window.onload = startInterval;
function startInterval()
{
setInterval(startTime();,1000);
}
function startTime(myvar)
{
document.getElementById('mine').innerHTML =Temperature
+parseInt(myvar);
}
/script
/head
body
h1Real Time Temperature:/h1
div id=mine/div
/body/html
I have Apache Web Server
But on running this my localhost , I am getting the following output
TemperatureNaN . Why is NaN being showed. Why cant I get the number as
read by se.readline()?
Is there a way to separate the Python code and the Javascript on different
files. If so can you please give a example.?
I am not really interested to do with bottle or other web framework as I
will be controlling my arduino with python from the web and also do video
image processing with openCV. Open CV have a support for Python and not for
Javascript.
Thanks
Subhendu Sinha Chaudhuri
CLEANTECH SOLUTION
www.cleantechsolution.in
SAVE PAPER , SAVE EARTH
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