SANWA SUPPLY TAP-TST10 control tool. Moved to https://github.com/nonakap/taptst10ctl

taptst10ctl.py

#!/usr/bin/env python
# 
# Copyright (C) 2013 NONAKA Kimihiro <nonakap@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

#
# SANWA SUPPLY TAP-TST10 control tool
#
# require: pyusb, libusb
# tested on python-2.7.5, pyusb-1.0.0a3, libusb-win32-bin-1.2.6.0
#
# My analysis result: http://d.hatena.ne.jp/nonakap/20130716#p2
#

import usb.core
import usb.util
import datetime

VENDOR=0x040b
PRODUCT=0x2201

ENDPOINT=0x82

now = datetime.datetime.now()

# find our device
dev = usb.core.find(idVendor=VENDOR, idProduct=PRODUCT)
if dev is None:
    raise ValueError('Device not found')

# set the active configuration. With no arguments, the first
# configuration will be the active one
dev.set_configuration()

# get an endpoint instance
cfg = dev.get_active_configuration()
interface_number = cfg[(0, 0)].bInterfaceNumber
alternate_setting = usb.control.get_interface(dev, interface_number)
intf = usb.util.find_descriptor(
    cfg, bInterfaceNumber = interface_number,
    bAlternateSetting = alternate_setting
)

outep = usb.util.find_descriptor(
    intf,
    # match the first OUT endpoint
    custom_match = \
    lambda e: \
        usb.util.endpoint_direction(e.bEndpointAddress) == \
        usb.util.ENDPOINT_OUT
)

assert outep is not None

# read the data
first = True
count = 0
size = 0
minute = 0
second = 0
watts = []
kWhs = []
outep.write('\x02\x18\x0a')
while True:
    data = dev.read(ENDPOINT, 17, intf, 1000)
    # dump raw data
    #print(" ".join("{:02x}".format(x) for x in data))

    if len(data) != 17:
        raise ValueError('response data length is invalid. (%d)' % (len(data)))
    assert data[0] == 0x01

    if first:
        assert data[16] == 0x0a
        minute = data[1]
        second = data[2]
        size = (data[3] << 8) | data[4]
        first = False
    else:
        for x in range(1, 16, 3):
            if (data[x] & 0x80) == 0x80:
                watt = ((data[x] & ~0x80) << 8) | data[x+1]
            else:
                watt = ((data[x] << 8) | data[x+1]) * 10
            watt = watt / 10.0
            watts.append(watt)
            kWh = data[x+2] / 100.0
            if len(kWhs) > 0:
                kWh = kWh + kWhs[len(kWhs) - 1]
            kWhs.append(kWh)
            count = count + 1
            size = size - 3
            if size <= 0:
                break

    if data[16] == 0xfe or size <= 0:
        break

print "No.,DateTime,Watt,kWh"
if count > 0:
    watt_unit = datetime.timedelta(minutes=10)
    start_time = now - watt_unit * (count - 1)
    for x in range(count):
        t = start_time.timetuple()
        print "%d,%d/%02d/%02d %02d:%02d,%.1f,%.2f" % (x + 1, t[0], t[1], t[2], t[3], (t[4] / 10) * 10, watts[x], kWhs[x])
        start_time = start_time + watt_unit