pi_arduino_uart_ex01.py のバックアップ(No.2)

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from tkinter import *
import tkinter as tk
from tkinter import scrolledtext
import serial
import threading
class App:
    def __init__(self,master):
        self.root=root
        self.root.title("command panel")
        self.root.configure(background="white")
        self.root.geometry("850x600")
        self.command_field=Entry(self.root, width=80)
        self.command_field.place(x=30,y=10)
        self.message_frame=tk.Frame(self.root,width=100, height=30)
        self.message_frame.place(x=30,y=50)
        self.message_area=scrolledtext.ScrolledText(self.message_frame)
        self.message_area.pack()
        self.message_line=0
        self.send_button=Button(self.root, text="send",bd=2,bg='white',
                                command=self.click_button,width=8, relief=RIDGE)
        self.send_button.place(x=700,y=10)
        
        self.serial=serial.Serial('/dev/ttyACM0',115200)
        self.serial.flush()
        thread=threading.Thread(target=self.read_loop,args=[],name='thread1')
        thread.start()        
        
    def click_button(self):
        inx=self.command_field.get()
        print("inx="+inx)
        self.serial.write(inx.encode('utf-8'))
        self.message_line=self.message_line+1
        self.message_area.insert(tk.END,">"+inx)
        self.message_area.insert(tk.END,'\n')
        self.serial.write('\n'.encode('utf-8'))
        self.command_field.delete(0,END)
 
    def read_loop(self):
        while True:
            c=self.serial.readline().decode('utf-8').rstrip()
            self.message_line=self.message_line+1
            self.message_area.insert(tk.END,c)
            self.message_area.insert(tk.END,'\n')
    
if __name__=="__main__":
    root = Tk()
    root.wm_title('Scrolling')
    app = App(root)
    root.mainloop()