python - 让 Arduino 无法与 Flask 框架一起工作，我做错了什么？

Question

这是一个学校俱乐部的项目。我有一个非常基本的 Arduino 程序，它以两种不同的速率闪烁 LED，具体取决于接收到的输入。我对python真的很陌生，所以我真的不知道自己在做什么。到目前为止，我为此编写了一小段代码，仅适用于 python。我只是让它接受用户输入并将其写入 Arduino。它工作得很好。

但我打算有一个基于烧瓶的 GUI 来控制 Arduino。我设置了两个按钮来做到这一点。当我修改代码以使用烧瓶应用程序运行时，Arduino LED 只闪烁一次并且不会运行程序。我不确定出了什么问题。这是我的代码：

阿杜诺：

 int led =13, data;
   void setup() {
    // put your setup code here, to run once:
   Serial.begin(9600); // Set the baud rate
  pinMode(13, OUTPUT); // Set the onboard LED to output
  digitalWrite(13, LOW);
  Serial.println("Ready");
}
void loop()
{
while (Serial.available())
{
  data = Serial.read();
}
if (data =='1')
{
    digitalWrite(led, HIGH); //turn LED on    
    delay(500); //wait for a second
    digitalWrite(led, LOW);//turn LED off
    delay(500); //wait for a second
}
if (data =='0')
{
    digitalWrite(led, HIGH);//turn LED on
    delay(2000); //wait for a second
    digitalWrite(led, LOW);//turn LED off
    delay(2000); //wait for a second
}
}

HTML 表单提交按钮：

<form action ="/gui" method= "POST">
    <input type="submit" name="submit" value="Blink Fast">
    <input type="submit" name="submit" value="Blink Slow">
</form>

蟒蛇烧瓶

import serial
from flask import render_template, request
from flask import Flask

app = Flask(__name__)


@app.route('/')
@app.route('/gui', methods=(['GET', 'POST']))
def hello_world():
    if request.method =='POST':
        request.form['submit']
        arduino_serial = serial.Serial('COM3', 9600)  # Create Serial port object called arduinoSerialData
        if request.form['submit']== 'Blink Fast':  # if the entered data is blink fast
            print(b'1')
            arduino_serial.write(b'1')  # send 1 to arduino
        elif request.form['submit']=='Blink Slow':
            arduino_serial.write(b'0')  # send 0 to arduino
            print(b'1')

    return render_template('gui.html')


if __name__ == '__main__':
    app.run()

最后这是有效的代码：

import serial

Arduino_Serial = serial.Serial('COM3', 9600)  # Create Serial port object called arduinoSerialData
print
Arduino_Serial.readline()  # read the serial data and print it as line
print("Enter 1 to ON LED and 0 to OFF LED")

while 1:  # infinite loop
    input_data = input()  # waits until user enters data
    print
    "you entered", input_data  # prints the data for confirmation

    if (input_data == '1'):  # if the entered data is 1
        Arduino_Serial.write(b'1')  # send 1 to arduino
        print("LED ON")

    if (input_data == '0'):  # if the entered data is 0
        Arduino_Serial.write(b'0')  # send 0 to arduino


print("LED OFF")

标签： pythonflaskarduinopyserial