# Templogging Script
import os
import time

# Settings
M_TIME = 5     # Measure time interval

counter = 0

def getCPUtemp():
    res = os.popen('vcgencmd measure_temp').readline()
    return (res.replace("temp=", "").replace("'C\n", ""))

print "starting logging ..."
print "press ctrl + c to exit"

# this rewrite the file!
f = open('temp_log.txt', 'w')
# write file header line
f.write('Temp LOG - time interval = {0} s\n'.format(M_TIME))

while True:
    temp_float = float(getCPUtemp())

    try:
        #print temp_float
        # write lines with timestamps in csv format
        f.write('{0},{1}\n'.format(counter,temp_float))
        counter = counter + M_TIME
    except:
        print "FEHLER"
    time.sleep(M_TIME)
f.close()