servicenow-chat-alert/yocto_powerrelay.py
d56066ff5ad2master

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 *
			from exceptions import YoctoConnectionError


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

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

			if not (relay.isOnline()):
			raise YoctoConnectionError('device offline')

			off(relay)
			return relay


			def on(relay):
			relay.set_state(YRelay.STATE_A)


			def off(relay):
			relay.set_state(YRelay.STATE_B)