Display more than one button in GUI to display MPU6000 Sensor readings

[wuf]

Hi barry76

Please try out the following modified script:

from functools import partial
import json
import serial
import tkinter as tk
from tkinter import messagebox

APP_TITLE = "Read Sensor"

APP_XPOS = 100
APP_YPOS = 100
APP_WIDTH = 150
APP_HEIGHT = 150


class Application(object):
    PORT = "COM4" #For Linux try "/dev/ttyUSB0" 
    BAUDRATES = ['9600','119200','34800']
    
    def __init__(self, main_win):
        self.main_win = main_win
        
        try:
            port = self.PORT
            self.ard = serial.Serial(port, timeout=1); 
        except serial.serialutil.SerialException as err:
            print(err) #"Could not find port!:{}".format(err)) #port))
            messagebox.showinfo('Error Message', err)
            return
            
        self.build()
        
    def build(self):
        self.main_frame = tk.Frame(self.main_win)
        self.main_frame.pack(fill='both', expand=True)

        self.tkvar = tk.StringVar()
        #Set the default option (Baudrate)
        self.tkvar.set(self.BAUDRATES[0])
        self.tkvar.trace('w', self.drop_call)
        
        popup_menu_frame = tk.Frame(self.main_frame)
        popup_menu_frame.pack(expand=True)
        
        #Pop Up desciption
        tk.Label(popup_menu_frame, text="Baudrate", font='bold'
            ).grid(row=0, column=0)
        popupMenu = tk.OptionMenu(popup_menu_frame, self.tkvar, *self.BAUDRATES)
        popupMenu.grid(row=1, column=0)

        self.value_button_var = tk.StringVar(self.main_win, "None")
        tk.Button(self.main_frame, textvariable=self.value_button_var,
            command=self.hello_callback).pack(expand=True)

    def drop_call(self, *args):
        baudrate = self.tkvar.get()
        
        if baudrate == '9600':
            self.set_serial_baudrate(baudrate)
        elif baudrate == '119200':
            self.set_serial_baudrate(baudrate)
        elif baudrate == '38400':
            self.set_serial_baudrate(baudrate)
        else:
            self.set_serial_baudrate(self.BAUDRATES[0])
             
    #Serial Callback Functions
    def hello_callback(self):
        k = self.ard.readline().decode('ascii');
        if(len(k)>0):
            print (k);
            size = len(k);
            #print (k[0:size-2]);
            print (size);
            messagebox.showinfo(
                'Message From Arduino',k[0:size-2]+'\n'+str(size))
            
    def set_serial_baudrate(self, baudrate):
        print("Baudrate: {}".format(baudrate))
        self.value_button_var.set(baudrate)
        baud = int(baudrate)
        self.ard.baudrate = baud
        

def main():
    main_win = tk.Tk()
    main_win.title(APP_TITLE)
    #main_win.geometry("+{}+{}".format(APP_XPOS, APP_YPOS))
    main_win.geometry("{}x{}".format(APP_WIDTH, APP_HEIGHT))
    
    app = Application(main_win)
    
    main_win.mainloop()
 
 
if __name__ == '__main__':
    main()      

Greetings from wuf