Python Serial.write 在 function 中不起作用

Question

我正在尝试写入Start function 中的串行端口，以便由某些 Arduino 代码接收。 当Calculate function 也包含serial.write命令时，就会出现问题。 function 正在做它应该做的事情，但实际上并没有写入串行端口。 （我在编码方面很新，以供参考）

这是我的 python 代码：

import tkinter as tk
import serial
import time

serialPortController = serial.Serial('COM7',38400)
time.sleep(3)

controllerStatus = 0
netTankFlow = 0
currentTankHeight = 50.0

#Calculation Function__________________________________________________________________________________
def Calculate():
    global currentTankHeight
    
    if currentTankHeight == 0.0:
        serialPortController.write(b'10')
    elif currentTankHeight <= 20:
        serialPortController.write(b'11')
    elif currentTankHeight <= 40:
        serialPortController.write(b'12')
    elif currentTankHeight <= 60:
        serialPortController.write(b'13')
    elif currentTankHeight <= 80:
        serialPortController.write(b'14')
    else:
        serialPortController.write(b'15')
        
    tankControllerWindow.update() 
    tankControllerWindow.after(500, Calculate)

#Start & Quit Functions________________________________________________________________________________
def Start():
    global controllerStatus
    startButton.place_forget()
    controllerStatusLabel["text"] = "Controller Status: Active"
    controllerStatusLabel["bg"] = 'lawngreen'
    controllerStatusLabel["fg"] = 'black'
    controllerStatus = 1
    Calculate()
    serialPortController.write(b'41')
            
def Exit():
    quit()

#GUI Window Parameters & Variables_____________________________________________________________________
tankControllerWindow = tk.Tk()
windowWidth = 405
windowHeight = 255
tankControllerWindow.title('Tank Control Interface')
tankControllerWindow.minsize(windowWidth,windowHeight)
tankControllerWindow.configure(bg='whitesmoke')

guiXposition1 = 15
guiXposition4 = guiXposition1 + 300
guiYposition1 = 15


#Start and Exit Buttons________________________________________________________________________________
startButton = tk.Button(text="Start",command=Start)
startButton.place(x=guiXposition1,y=guiYposition1)

controllerStatusLabel = tk.Label(text="Controller Status: Inactive",
                                 bg='darkred',fg='white',width=20,justify='left')
controllerStatusLabel.place(x=guiXposition1+40,y=guiYposition1+2)

exitButton = tk.Button(text="Exit",command=Exit)
exitButton.place(x=guiXposition4+5,y=guiYposition1)

tankControllerWindow.mainloop()

以及用于测试它的 Arduino 代码

byte input;

void setup() {
  
  Serial.begin(38400);
  
  pinMode(led, OUTPUT);
  digitalWrite(led, HIGH);
}


void loop() {
  
  if (Serial.available() > 0) {
    input = Serial.parseInt();
  }

  if (input == 41) {
    Command();
  } 

}

void Command(){
  digitalWrite(led, LOW);
}

Answer 1

将.write(b'41')更改为.write(b'\n41')解决了这个问题。 归功于杰森哈珀。 谢谢！