Python + Arduino与Mac OS X.

I'm having trouble communicating between my Arduino and Python. I have a couple of questions that I hope can be answered, but first and most importantly, I need to simply establish a connection.

我在Arduino和Python之间进行通信时遇到问题。我有几个问题希望可以回答,但首先也是最重要的是,我需要简单地建立连接。

For Windows, apparently the solution is rather convenient, but on Mac OS X, I apparently need to access some system files (which I am not familiar with). The Python documentation points me to the specific post Re: Can Python do serial port stuff?, but I don't think it quite serves my purposes.

对于Windows,显然解决方案相当方便,但在Mac OS X上,我显然需要访问一些系统文件(我不熟悉)。 Python文档向我指出了具体的帖子Re:Python可以做串口吗?但我不认为它完全符合我的目的。

At this point, trying to merely see evidence of communication I've tried this.

在这一点上,我试图仅仅看到沟通的证据我已经尝试过了。

Arduino:

void setup(){
    Serial.begin(9600);
}

void loop()
{
    int d = Serial.read();
    Serial.println(d,BYTE);
}

Python: (pretty much from the mentioned link...)

Python :(几乎来自上面提到的链接...)

 #!usr/bin/python
 import os, fcntl, termios, sys

 serialPath = '/dev/tty.usbmodemfa141'

 ser= os.open(serialPath, 0)
 [iflag, oflag, cflag, lflag, ispeed, ospeed, cc] = range(7)
 settings = termios.tcgetattr(ser)
 settings[ospeed] = termios.B9600
 settings[ispeed] = termios.B0
 print 2

As evidenced here, I really don't understand what the modules I am importing are doing exactly. While reading the documentation I see no obvious way to send data over serial. So am I right in guessing that whatever the output of this program is it will be sent over automatically?

正如这里所证明的那样,我真的不明白我导入的模块到底在做什么。在阅读文档时,我看不到通过串行发送数据的明显方法。所以我正确地猜测无论该程序的输出是什么,它都将自动发送?

2 个解决方案

#1

The easiest way to communicate in Python with the Arduino (or any microcontroller with serial) is using pySerial.

用Arduino(或任何带串口的微控制器)在Python中进行通信的最简单方法是使用pySerial。

Here's an example:

这是一个例子:

import serial
s = serial.Serial(port='/dev/tty.usbmodemfa141', baudrate=9600)

s.write('text')
s.read()
s.readline()

PS: If you're using Python 3, you should send bytes instead of strings (that is, b'text').

PS:如果您使用的是Python 3,则应该发送字节而不是字符串(即b'text')。

#2

I have done this using Perl under Linux, but have no experience with Python or Mac. I can give you a few pointers to look for.

我在Linux下使用Perl完成了这项工作,但没有使用Python或Mac的经验。我可以给你一些指点。

First, in your Python program you need to put the proper device address for your USB port in serialPath as otherwise your data will not reach the Arduino. In Linux I did a lsusb after I connected the board and found the device name from that.

首先,在Python程序中,您需要在serialPath中为USB端口设置正确的设备地址,否则您的数据将无法到达Arduino。在Linux中,我在连接电路板后找到了lsusb,并从中找到了设备名称。

In your Arduino code change it to be

在你的Arduino代码中改变它

void loop()
{
   if(Serial.available() > 0)
   {
       d = Serial.read();
       Serial.println(d,BYTE);
   }
}

as otherwise you will be dumping a bunch of -1s if there is no data.

否则,如果没有数据,你将倾倒一堆-1。

#1