measuring temperature with the TEMPer USB Thermometer in every 60 seconds

meas.py

#!/usr/bin/python
from temperusb import TemperHandler
import threading, time
import logging

# logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

fh = logging.FileHandler('temp.log')
fh.setLevel(logging.INFO)

fmt = logging.Formatter('%(message)s')
fh.setFormatter(fmt)

logger.addHandler(fh)

# temperusb
th = TemperHandler()
devs = th.get_devices()

def foo(next_call):
  logger.info('%0.2f %s'%(time.time(), devs[0].get_temperature()))
  next_call = next_call+60
  threading.Timer( next_call - time.time(), lambda :foo(next_call) ).start()

next_call = time.time()
foo(next_call)

plt.py

#!/usr/bin/python
import numpy as np
import matplotlib.pyplot as plt
import time, datetime

D = np.loadtxt('temp.log')
x = map(lambda t: datetime.datetime.fromtimestamp(t), D[:,0])
y = D[:,1]

plt.plot(x,y)
plt.gcf().autofmt_xdate()
plt.ylim([10,30])
plt.show()

watch.sh

#!/bin/bash

watch -n 10 'gnuplot << EOF
set term dumb
set timefmt "%s"
set format x "%m/%d/%Y"
set xdata time
set xtics 24*60*60
#set yrange [10:40]
set autoscale fix
plot "< tail -n `expr 3 \* 24 \* 60` temp.log" \\
     usi (\$1+9*60*60):2 w l t "temperature"
EOF'