sentinelcmd

#!/usr/bin/python

import serial, time, argparse

# Commands supported by usb-sentinel
# Power on: #PWR:ON\n
# Power off: #PWR:OFF\n
# Status request: #PWR:?\n

# Power ON command
def PowerOn():
	ser.write(b"#PWR:ON\n")

# Power OFF command
def PowerOff():
	ser.write(b"#PWR:OFF\n")

# Power cycle commmand
def PowerCycle(seconds):
	PowerOff()
	time.sleep(seconds)
	PowerOn()

# Setup argument parser
parser = argparse.ArgumentParser(
	prog='usb-sentinel',
	description="USB-SENTINEL command tool",
	epilog="This tool controls AERIN's USB-SENTINEL device.")
parser.add_argument("port", help="Serial port assigned to the sentinel device (ie: /dev/ttyACM0)", default="/dev/ttyACM0")
parser.add_argument("-on", "--poweron", help="Set USB power ON", action="store_true")
parser.add_argument("-off", "--poweroff", help="Set USB power OFF", action="store_true")
parser.add_argument("-cycle", "--powercycle", help="Perorm a USB power cycle OFF -> ON", type=int, action="store", default="5")


args = parser.parse_args()

if args.port:
	print "Using port: " + args.port

# Open serial port
try:
	ser = serial.Serial(args.port, 115200, timeout=2)
except serial.SerialException:
	print "Unable to open port: " + args.port
	exit()

# Sanity check
if ser.isOpen() == "False":
	print "Unable to open serial port"

if args.poweron:
	print "Command: Power ON"
	PowerOn()

elif args.poweroff:
	print "Command: Power OFF"
	PowerOff()

elif args.powercycle:
	print "Command: Power cycle, delay = " + str(args.powercycle) + " seconds."
	seconds = args.powercycle
	PowerCycle(seconds)