Everything works instead of this inconvenience. I tried to set text, but it doesn't work. Every new scan it should appear new text scanned from tag, but it is the same text from global variables from RFID script.
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onChangeState(self, state):
MIFAREReader = MFRC522.MFRC522()
if state == MainWindow.state1:
self.ui.label_4.setText(MIFAREReader.tagId) ###-->text from RFID script
self.ui.label_2.setText(MIFAREReader.tagName) ###-->text from RFID script
self.ui.label_3.setText(MIFAREReader.tagDetails) ###-->text from RFID script
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
This is the code for text I want to be printed in the GUI from script of the RFID.
class MFRC522():
#Strings for GUI
tagId = "txt"
tagName = "txt"
tagDetails = "txt"
#########
#########
#########
#########
def MFRC522_Read(self, blockAddr):
self.tagId = "Product ID: "
self.tagName = "Product Name: "
self.tagDetails = "Product Details: "
recvData = []
recvData.append(self.PICC_READ)
recvData.append(blockAddr)
pOut = self.CalulateCRC(recvData)
recvData.append(pOut[0])
recvData.append(pOut[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData)
if not(status == self.MI_OK):
message = "Error while reading!"
## print (message)
i = 0
backDataText = ""
if len(backData) == 16:
for x in range(0, len(backData)):
backDataText = backDataText + chr(int(backData[x]))
for iA in range(len(self.indexMark)):
numbersFound = re.search(r'\d+', backDataText)
DataTextNumeric = numbersFound.group()
DataTextNumeric = int(DataTextNumeric)
if DataTextNumeric == self.indexMark[iA]:
message = "Product Code: %s \n Product Name: %s \n Details: %s" % (backDataText, self.productsName[iA], self.productsDetails[iA])
Id = DataTextNumeric
Name = self.productsName[iA]
Details = self.productsDetails[iA]
## print (message)
break
self.tagId += str(Id)
self.tagName += Name
self.tagDetails += Details
print (self.tagId) ###-->"Product ID: ####" this prints in the console
every time I scan a new thing, so the code works
The code is good, but it's something that I cannot understand how it's working. Everytime I read a new tag, the message on GUI is the value of global variables from RFID script not changed. I do not have so much experience, I am sorry for that.
With the following line in onChangeState():
MIFAREReader = MFRC522.MFRC522()
you are creating another object, which is different from the object created in reading(), and consequently that will not have the RFID information, that leads me to think that you have to reinforce your OOP concepts.
As indicated in your previous question, the data should be sent using the signals:
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
infoChanged = QtCore.pyqtSignal(str, str, str)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.infoChanged.connect(self.onInfoChanged)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onInfoChanged(self, text1, text2, text3):
self.ui.label_4.setText(text1) ###-->text from RFID script
self.ui.label_2.setText(text2) ###-->text from RFID script
self.ui.label_3.setText(text3) ###-->text from RFID script
def onChangeState(self, state):
if state == MainWindow.state1:
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
# send data via signal
self.infoChanged.emit(MIFAREReader.tagId, MIFAREReader.tagName, MIFAREReader.tagDetails)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())