servicenow-chat-alert/yocto-powerrelay.py
9f2fba144c8fmaster

yocto-powerrelay.py
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			#!/usr/bin/python
			# -- coding: utf-8 --
			import os
			import sys

			# add ../../Sources to the PYTHONPATH
			sys.path.append(os.path.join("yoctoLib.python.26380/Sources"))
			from yocto_api import *
			from yocto_relay import *


			def usage():
			scriptname = os.path.basename(sys.argv[0])
			print("Usage:")
			print(scriptname + ' <serial_number> [ A \| B ]')
			print(scriptname + ' <logical_name> [ A \| B ]')
			print(scriptname + ' any [ A \| B ]')
			print('Example:')
			print(scriptname + ' any B')
			sys.exit()


			def die(msg):
			sys.exit(msg + ' (check USB cable)')


			if len(sys.argv) < 2:
			usage()

			target = sys.argv[1].upper()
			state = sys.argv[2].upper()

			# Setup the API to use local USB devices
			errmsg = YRefParam()
			if YAPI.RegisterHub("usb", errmsg) != YAPI.SUCCESS:
			sys.exit("init error" + errmsg.value)

			if target == 'ANY':
			# retreive any Relay
			relay = YRelay.FirstRelay()
			if relay is None:
			die('no device connected')
			else:
			relay = YRelay.FindRelay(target + ".relay1")

			if not (relay.isOnline()):
			die('device not connected')

			if state == 'A':
			relay.set_state(YRelay.STATE_A)
			else:
			relay.set_state(YRelay.STATE_B)
			YAPI.FreeAPI()