cara kerjanya adalah: sistem raspberry menerima data serial dari PC operator
msial operator2 mengirimkand data antrian U77
maka secara background : PC tsb akan mengirimkan data serialnya ke raspberry
dan raspberry akan meresponnya dengan menampilkannya secara Realtime ke display moitornya
Sederhana namun bobot dari koding ini adalah sbb:
+Realtime GUI
+Realtime Serial Event
+Python Berbasis GUI
Harapannya semoga aplikasi ini bisa menambah kecintaan kita pada raspberry PI....CMIIw :-)
from PyQt5 import QtCore, QtGui, QtWidgets
import serial
import time, threading
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5 import QtWidgets
global ser
ser = serial.Serial('/dev/ttyUSB0', baudrate=1200, timeout=10,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS
)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
desktop = QDesktopWidget()
screenwidth = desktop.screen().width()+100
screenheight = desktop.screen().height()+100
top=screenheight/7
bottom=screenheight-top-top-100
MainWindow.setObjectName("MainWindow")
MainWindow.resize(screenwidth, screenheight)
MainWindow.setStyleSheet("background-color: #003366;")
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.lbl = QtWidgets.QLabel(self.centralwidget)
self.lbl.setGeometry(QtCore.QRect(-5, top-100, screenwidth, 80))
self.lbl.setStyleSheet("color: #FFFFFF;font:Bold")
self.lbl.setFont(QFont('Xtreme Chrome',60))
self.lbl.setAlignment(QtCore.Qt.AlignCenter)
self.lbl.setObjectName("lbl")
self.lblCounter = QtWidgets.QLabel(self.centralwidget)
self.lblCounter.setGeometry(QtCore.QRect(-5, top+30, screenwidth, 300))
self.lblCounter.setStyleSheet("background-color: #000000; color: #FFFF00;font:Bold")
self.lblCounter.setFixedHeight(300)
self.lblCounter.setAlignment(QtCore.Qt.AlignCenter)
self.lblCounter.setFont(QFont('Xtreme Chrome',250))
self.lblCounter.setObjectName("lblCounter")
self.lblLoket = QtWidgets.QLabel(self.centralwidget)
self.lblLoket.setGeometry(QtCore.QRect(-5, bottom, screenwidth, 130))
self.lblLoket.setStyleSheet("background-color: #cccccc; color: #ff0000;font:Bold")
self.lblLoket.setFixedHeight(150)
self.lblLoket.setAlignment(QtCore.Qt.AlignCenter)
self.lblLoket.setFont(QFont('Xtreme Chrome',130))
self.lblLoket.setObjectName("lblLoket")
##################
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 259, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", " "))
self.lblCounter.setText(_translate("MainWindow", "A000"))
self.lblLoket.setText(_translate("MainWindow", "Loket X"))
self.lbl.setText(_translate("MainWindow", "NOMOR ANTRIAN"))
# User Code
self.timeout = 0
self.check_serial_event()
def check_serial_event(self):
serial_thread = threading.Timer(1, self.check_serial_event)
if ser.is_open == True:
serial_thread.start()
distance=""
char1='T' #Loket 1
char2='B'
if ser.in_waiting:
while True:
try:
msg = ser.readline().decode('ascii')
distance=distance+msg
if distance.index(char2):
break
except:
pass
print (distance)
ser.flush()
#ser.close()
l1=distance.index(char1)
#l2=distance.index(char2)
l2=distance.find(char2, l1+5)
H1=distance[l1:l2-2] #l1+7
H2=distance[l2:l2+4]
print ('H1='+H1)
print ('H2='+H2)
self.lblLoket.setText(H1)
self.lblCounter.setText(H2)
distance=""
#ser.close()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Implementasinya:
