我遇到了这个问题,我无法在标签上显示任何值,只要有新数据从串行端口传入,我就想不断更新它。我是 python 新手,真的需要帮助。
import tkinter
import tkinter.messagebox
import serial
import time
ser = serial.Serial(
port='COM5',\
baudrate=9600,\
parity=serial.PARITY_NONE,\
stopbits=serial.STOPBITS_ONE,\
bytesize=serial.EIGHTBITS,\
timeout=4)
class Menu:
def __init__(self):
self.main_window = tkinter.Tk()
self.main_window.title("Room Light System")
self.main_window.geometry("1200x600")
#Frames
self.frame_2 = tkinter.Frame(self.main_window, bg='Orange') # Receiving DATAs
#ReceiveLabel
self.ReceiveLabel = tkinter.Label(self.frame_2,\
text = 'Received DATAs',\
bg = 'White',\
height = 2, width = 20)
#Temperature
self.GetTempLabel = tkinter.Label(self.frame_2,\
text='Temperature :')
self.TempValue = tkinter.StringVar()
self.GetTempValueLabel = tkinter.Label(self.frame_2,bg = 'Green',\
textvariable = self.TempValue
)
#PACKING!!! F2
self.frame_2.pack()
self.frame_2.place(x=410, y=0, height=300, width=400)
#ReceiveLabel
self.ReceiveLabel.pack()
self.ReceiveLabel.place(x=100, y=10)
#Temperature
self.GetTempLabel.pack()
self.GetTempLabel.place(x=50, y=80, height=20, width=120)
self.GetTempValueLabel.pack()
self.GetTempValueLabel.place(x=200, y=80, height=20, width=50)
#main loop and quit
self.quitButton = tkinter.Button(self.main_window,\
text = 'Quit',
command = self.main_window.destroy,\
height = 2, width = 6)
self.quitButton.pack()
self.quitButton.place(x=200, y=500)
tkinter.mainloop()
def GetTemp(self):
data = bytearray()
while(1):
readline = ser.read(size=10)
if len(readline) > 0 :
data = readline
v = memoryview(data)
P = v.tobytes()
P = P.decode(encoding='UTF-8')
self.TempValue.set(P)
gui = Menu()
ser.close()