Script to demontrate WiFi controlled varaic

variac.py

#!/usr/bin/env python

import pycurl
from StringIO import StringIO
from time import *
import re

def curl(url):
    buffer = StringIO()
    c = pycurl.Curl()
    c.setopt(c.URL, url)
    c.setopt(c.WRITEDATA, buffer)
    c.perform()
    c.close()
    return buffer.getvalue()

regex = re.compile('(.*)V *(.*)A *(.*)W Pos *(.*)')

for v in xrange(10, 251, 10):
    curl('http://variac/readings?deadband=0&set=&voltage=' + str(v))
    while True:
        sleep(0.2)
        readings = curl('http://variac/readings')
        results = regex.match(readings).groups()
        V = float(results[0])
        A = float(results[1])
        W = float(results[2])
        P = int(results[3])
        if abs(v -V) < 0.1:
            break
    print v, V, A, W, P
curl('http://variac/readings?manual=')