PyQtgraph x QTimer

DAMSdevnation

Hi all;

Now, another problem..
When i run pyqtgraph...

                 self.frame = PlotWidget(Dialog)
                 ....

                 self.timer1 = QTimer()
                 self.timer1.timeout.connect(self.showtime)
                 self.timer1.start()

                 self.timer2 = QTimer()
                 self.timer2.timeout.connect(self.showspo2)
                 self.timer2.start(250)       

         def showtime(self):
                 time=QDateTime.currentDateTime()
                 timeDisplay=time.toString(....) 
                 self.label.setText(timeDisplay)
     
         def showspo2(self):
                 spo2=sum(....)
                 self.label2.setText(str(spo2))
                 self.frame.plot(str(spo2))

... the window open and the labels works, but the graphic doesn't. The error that appears on the output is:
if y is None or len(y) == 0: # empty data is represented as None
TypeError: len() of unsized object.

Note:
The graphic should be data(y) vs time(x).

JonB

@DAMSdevnation
Since the error shows Python code not in your own, isn't this something elsewhere in PyQtgraph to ask in a PyQtGraph forum? Or is it your own code and you don't show it?

DAMSdevnation

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from pyqtgraph import PlotWidget, plot
import pyqtgraph
import time
import os
import label_teste
import max30100

mx30 = max30100.MAX30100()
mx30.enable_spo2()

class Ui_Dialog(object):

def setupUi(self, Dialog):
    Dialog.setObjectName("Dialog")
    Dialog.resize(1400, 350)
    self.label = QtWidgets.QLabel(Dialog)
    self.label.setGeometry(QtCore.QRect(60, 180, 381, 81))
    font = QtGui.QFont()
    font.setFamily("Arial")
    font.setPointSize(18)
    self.label.setFont(font)
    self.label.setAlignment(QtCore.Qt.AlignCenter)
    self.label.setObjectName("label")
    self.label.setStyleSheet("background-color: rgb(71, 71, 71);")
    self.label.setStyleSheet("color: rgb(55, 55, 127);")

    self.label2 = QtWidgets.QLabel(Dialog)
    self.label2.setGeometry(QtCore.QRect(60, 50, 381, 81))
    font = QtGui.QFont()
    font.setFamily("Arial")
    font.setPointSize(18)
    self.label2.setFont(font)
    self.label2.setAlignment(QtCore.Qt.AlignCenter)
    self.label2.setObjectName("label2")
    
    self.label3 = QtWidgets.QLabel(Dialog)
    self.label3.setGeometry(QtCore.QRect(60, 100, 381, 81))
    font = QtGui.QFont()
    font.setFamily("Arial")
    font.setPointSize(18)
    self.label3.setFont(font)
    self.label3.setAlignment(QtCore.Qt.AlignCenter)
    self.label3.setObjectName("label3")
    
    self.frame_6 = PlotWidget(Dialog)
    self.frame_6.setGeometry(QtCore.QRect(500, 40, 830, 280))
    self.frame_6.setStyleSheet("background-color: rgb(79, 79, 79);")
    self.frame_6.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.frame_6.setFrameShadow(QtWidgets.QFrame.Raised)
    self.frame_6.setObjectName("frame_6")
    self.frame_6.setLabel('left', "<span style=\"color:white;font-size:20px\">SpO2 (%)</span>")
    
    self.timer = QTimer()
    self.timer.setInterval(20)
    self.timer.timeout.connect(self.showbpm)
    self.timer.start(500)
    
    self.timer2 = QTimer()
    self.timer2.setInterval(0)
    self.timer2.timeout.connect(self.showtime)
    self.timer2.start(100)
    
    self.timer3 = QTimer()
    self.timer3.setInterval(20)
    self.timer3.timeout.connect(self.showspo2)
    self.timer3.start(250)

    self.retranslateUi(Dialog)
    QtCore.QMetaObject.connectSlotsByName(Dialog)

def retranslateUi(self, Dialog):
    _translate = QtCore.QCoreApplication.translate
    Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
    self.label.setText(_translate("Dialog", "TextLabel"))
    self.label2.setText(_translate("Dialog", "TextLabel2"))
    self.label3.setText(_translate("Dialog", "TextLabel3"))
    
def showtime(self):
    time=QDateTime.currentDateTime()
    timeDisplay=time.toString('dd/MM/yyyy hh:mm:ss dddd')
    self.label.setText(timeDisplay)
    
def showbpm(self):
    mx30.read_sensor()
    bpm=14000/((1)+sum(mx30.buffer_red)/len(mx30.buffer_red)/100)
    
    if (bpm>220):
            bpm ='NA'
            
    self.label2.setText(str(bpm)[:5])
    
def showspo2(self):
    mx30.read_sensor()
    spo2=sum(mx30.buffer_ir)/len(mx30.buffer_ir)/100
    self.label3.setText(str(spo2)[:4])
    self.frame_6.plot(str(spo2))

from pyqtgraph import PlotWidget

if name == "main":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())

JonB

@JonB said in PyQtgraph x QTimer:

@DAMSdevnation
Since the error shows Python code not in your own, isn't this something elsewhere in PyQtgraph to ask in a PyQtGraph forum? Or is it your own code and you don't show it?

if y is None or len(y) == 0: # empty data is represented as None
TypeError: len() of unsized object.

DAMSdevnation

But how i say, X-axis (time) and Y-axis (data)?