ec3k_recv

#!/usr/bin/python
import ec3k
import signal
import time
import argparse
import json

want_stop = False

def handler(signum, frame):
	global want_stop
	print "Signal %d caught! Stopping..." % (signum,)
	want_stop = True

def main():
	signal.signal(signal.SIGTERM, handler)
	signal.signal(signal.SIGINT, handler)

	parser = argparse.ArgumentParser()
	parser.add_argument('-f', '--frequency', type = float, default = 868.402e6)
	parser.add_argument('-j', '--json', action = 'store_true', default = False)
	parser.add_argument('-q', '--quiet', action = 'store_true', default = False)
	args = parser.parse_args()

	def callback(state):
		if args.json:
			print(json.dumps(dict(id=state.id,
			                      device_on_flag=state.device_on_flag,
			                      energy=state.energy,
			                      power_current=state.power_current,
			                      power_max=state.power_max,
			                      time_on=state.time_on,
			                      time_total=state.time_total)))
		else:
			print(state)

	my_ec3k = ec3k.EnergyCount3K(callback=callback, freq=args.frequency)
	my_ec3k.start()

	while not want_stop:
		time.sleep(2)
		if not args.quiet:
			print "Noise level: %.1f dB" % (my_ec3k.noise_level,)

	my_ec3k.stop()

if __name__ == '__main__':
	main()