Thermoco.py

#!/usr/bin/env python
# -*- coding: utf-8 vi:noet
# Thermoco reader

import subprocess

class Thermoco(object):
	def __init__(self, mac):
		self._mac = mac
	
	def get_temp(self):
		cmd = [
		 "gatttool",
		 "--device=%s" % self._mac,
		 "--char-read",
		 "--handle=0x0029",
		]
		proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
		out = proc.stdout.read()
		res = proc.wait()
		if res != 0:
			return -273.15
		vals = out.decode("utf-8").split()[-2:]
		temp_code = int(vals[0], 16)*256 + int(vals[1], 16)
		temp = temp_code / 256.0
		if int(vals[0], 16) >= 128:
			temp -= 256
		return temp

if __name__ == "__main__":
	import sys, io, os, time, datetime, argparse

	parser = argparse.ArgumentParser()

	parser.add_argument("mac",
	 nargs="+",
	)

	args = parser.parse_args()

	thermocos = [ Thermoco(x) for x in args.mac ]

	while True:
		print("%s" % datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S"))
		for thermoco in thermocos:
			sys.stdout.write("- %s" % thermoco._mac)
			print(": %9.4f" % (thermoco.get_temp()))
		time.sleep(1.0)