使用Flask运行多个Python函数

Question

第二次更新

快到了！！但是出现了一个错误：“ValueError: 尝试使用一个未打开的端口”。

File "c:\Python27\lib\site-packages\flask\app.py", line 1701, in __call__
return self.wsgi_app(environ, start_response)

File "c:\Python27\lib\site-packages\flask\app.py", line 1689, in wsgi_app
response = self.make_response(self.handle_exception(e))

File "c:\Python27\lib\site-packages\flask\app.py", line 1687, in wsgi_app
response = self.full_dispatch_request()

File "c:\Python27\lib\site-packages\flask\app.py", line 1360, in full_dispatch_request
rv = self.handle_user_exception(e)

File "c:\Python27\lib\site-packages\flask\app.py", line 1358, in full_dispatch_request
rv = self.dispatch_request()

File "c:\Python27\lib\site-packages\flask\app.py", line 1344, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)

File "G:\OverAir\arduino\server.py", line 19, in light_off
board.output([pin])

File "G:\OverAir\arduino\arduino.py", line 16, in output
self.__sendData(len(pinArray))

File "G:\OverAir\arduino\arduino.py", line 56, in __sendData
while(self.__getData()[0] != "w"):

File "G:\OverAir\arduino\arduino.py", line 61, in __getData
return self.serial.readline().rstrip('\n')

File "c:\Python27\lib\site-packages\serial\serialwin32.py", line 221, in read
if not self.hComPort: raise portNotOpenError

ValueError: Attempting to use a port that is not open

更新

下面@Blender的代码可能是正确的。现在我遇到的问题是，我收到了“SerialException: 无法打开端口 COM5: [错误 5] 访问被拒绝。”

不过，如果我单独运行我的原始脚本 on.py 或 off.py，都是可以正常工作的……我不明白为什么新代码不行……难道它尝试打开 COM5 两次吗？？

更新结束

我正在尝试使用 Flask 运行多个 Python 函数，或者分开的 .py 脚本，以生成不同的 URL。只是想在本地控制 Arduino 的开关。

例如，我有 on.py 和 off.py，想要构建一个 server.py。所以，当我打开 127.0.0.1:5000/on 时，它会运行 on.py，类似地，127.0.0.1:5000/off 会运行 off.py。

经过几个小时的尝试，我决定把这两个 .py 函数都放进 server.py，但当然它并没有工作……我想我只是对参数的使用不太理解。

非常感谢你的帮助！

## Open a serial connection with Arduino.

from time import sleep
from arduino import Arduino

from flask import Flask


b = Arduino("COM5",9600)
pin = 13
num = 5

ON = Flask("Light_ON")
OFF = Flask("Light_OFF")


def LightON():
    #declare output pins as a list/tuple
    b.output([pin])
    b.setHigh(pin)
    b.close()
    return 'Light is ON'

def LightOFF():
    #declare output pins as a list/tuple
    b.output([pin])
    b.setLow(pin)
    return 'Light is OFF'

@ON.route('/ON')
@OFF.route('/OFF')

ON.run()
OFF.run()  //I know this doesn't run, just not sure how to include it.

Answer 1

像这样应该可以工作：

from arduino import Arduino
from flask import Flask

app = Flask('light_control')
board = Arduino('COM5', 9600)
pin = 13

@app.route('/on')
def light_on():
    board.output([pin])
    board.setHigh(pin)
    board.close()

    return 'Light is ON'

@app.route('/off')
def light_off():
    board.output([pin])
    board.setLow(pin)
    # board.close() ???

    return 'Light is OFF'

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