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@ronivaldo
Forked from dlitvak13/readscale.py
Created November 3, 2017 19:20
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#!/usr/bin/python
#-*- coding: UTF-8 -*-
import os, time
import usb.core
import usb.util
import pygtk
pygtk.require('2.0')
import gtk
from sys import exit
#DYMO M25
VENDOR_ID = 0x0922
PRODUCT_ID = 0x8004
def connect():
# find the USB device
dev = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID)
if dev is None:
print "device not found"
return dev
else:
devmanufacturer = usb.util.get_string(dev, 256, 1)
devname = usb.util.get_string(dev, 256, 2)
print "device found: " + devmanufacturer + " " + devname
interface = 0
if dev.is_kernel_driver_active(interface) is True:
print "but we need to detach kernel driver"
dev.detach_kernel_driver(interface)
# use the first/default configuration
dev.set_configuration()
print "claiming device"
usb.util.claim_interface(dev, interface)
return dev
def disconnect(dev):
interface = 0
print 'release claimed interface'
usb.util.release_interface(dev, interface)
#print 'now attaching the kerneal driver again'
#dev.attach_kernal_driver(interface)
print 'device disconnected'
def analyzeData(data):
DATA_MODE_GRAMS = 2
DATA_MODE_OUNCES = 11
last_raw_weight_stable = 4
weight = 0
if data != None:
raw_weight = data[4] + data[5] * 256
if raw_weight > 0 and data[1] == 4:
if data[2] == DATA_MODE_OUNCES:
ounces = raw_weight * 0.1
weight = "%s oz" % ounces
elif data[2] == DATA_MODE_GRAMS:
grams = raw_weight
#convert to ounces
grams = round(grams / 28.3495, 2)
weight = "%s oz" % grams
print "stable weight: " + weight
clipboard = gtk.clipboard_get()
clipboard.set_text(str(weight))
clipboard.store()
if raw_weight == 0:
print 'All zeros'
def grabData(dev):
try:
# first endpoint
endpoint = dev[0][(0,0)][0]
# read a data packet
attempts = 10
data = None
while data is None and attempts > 0:
try:
data = dev.read(endpoint.bEndpointAddress,
endpoint.wMaxPacketSize)
except usb.core.USBError as e:
data = None
if e.args == ('Operation timed out',):
attempts -= 1
print "timed out... trying again"
continue
return data
except usb.core.USBError as e:
print "USBError: " + str(e.args)
except IndexError as e:
print "IndexError: " + str(e.args)
#############main################
while True:
dev = connect()
if dev is not None:
print 'Connected'
data = grabData(dev)
print 'Got Data: ' + str(data)
analyzeData(data)
print 'Data Analyzed'
print str(grabData(dev))
print 'data cleared'
disconnect(dev)
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