Question

我的Python 3代码：

from tkinter import *
import serial
import struct

ser = serial.Serial('COM4',9600)# establish a connection with  port

root = Tk()

root.geometry('500x500+50+50')
root.title('ARDIUNO LED SLIDER')

##################################

def print_value(val):
#struct.pack('>B', 45)# tried this but not working
    ser.write(str(val).encode())
    print(ser.readline())


###############################

#Note that to pass the from option as a keyword argument,
# you need to add a trailing underscore (from is a reserved keyword in    Python).
w = Scale(root, from_=0, to=100,length=400,   orient=HORIZONTAL,command=print_value)
w.pack(side=TOP,anchor=S)

root.mainloop()

我的Arduino代码：
这是在Uno上完成的Arduino代码

void setup() {
   // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led,OUTPUT);// declare pin 9 to be an o/p

}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available() > 0) {  //  looking for availability of data in     serial monitor

    data= Serial.read();// read the data from serial monitor
    //Serial.println(int(data));
    Serial.write(data);


  delay(100);
  }
}

我得到的错误是：

有时会挂起

其他时候移动滑块时出现以下错误消息

raise TypeError('unicode strings are not supported, please encode to bytes: {!r}'.format(seq))
TypeError: unicode strings are not supported, please encode to bytes: '10'

如何从Python 3向Arduino发送整数（从Tkinter使用的比例）并获得返回的正确整数

0 个答案: