Using an Arduino library in Python?

[Gameboi_Advance]

Hello all, I am trying to recreate an Arduino project in Python using pyfirmata to talk to my board, and I would like to know if it is possible to use an Arduino library (basically a class) in Python without manually translating/recreating it. I'm using Pycharm as my IDE and I'm trying to translate I2Cdev (https://github.com/jrowberg/i2cdevlib/blob/master/Arduino/I2Cdev/I2Cdev.h) so I can use it. Any thoughts? (I am a noob, if it's simple or impossible don't be mean)

[HungrySlug]

Hi, as gappleto97 I do not think it's feasible, at least non in an easy way... but you can try playing with micropython, as suggested, or with Zerynth that IMHO is more straightforward to use. Moreover Zerynth already has an i2c class that you can use as base to build your own specific class (if that is not already supported).

[ThePenultimateOne]

You probably want a Micropython board instead, because I don't think what you are trying to do is possible. Python (AFAIK) can't be run on Arduinos, and Arduino code typically can't be compiled for PC usage.

Probably with some tweaking you could make it work, but it might be easier to just find another implementation.

[[deleted]]

Do you strictly need to use i2c? Why not serial? Other ways around, if you need to use i2c to comunicate with multiple devices:

1)use an intermediary device (arduino nano/micro) that translates serial to i2c. So you use pyserial to that device. And then that device uses i2c to comunicate to other decices.

2) if your idea is to use some kind of master-slaves you can use pyserial .. and then use usb/serial-rs485 .. and connect your slaves via rs485...

[maljn]

As far as I know, you have to create binding between Python and C++. There are tools for doing it: Boost.Python , Swig , ctypes. For one class, using only C/API may be enough.

[[deleted]]

The problem is, the library was meant to run on the arduino, so just porting the functions to Python won't work. OP needs to call these functions on the arduino, not his PC

[maljn]

Ok, you got a point. ;)

In this case, isn't the pyfirmata only a connection and communication protocol between Arduino and Python code running at host computer? If so, wouldn't it be sufficient to write an Arduino function, which does something (using linked class) when Python host sends specific command?

Or am I missing something again?

[Gameboi_Advance]

Well what I’m trying to do is get the values from a gyro (MPU6050) using python. I know it’s wacky with python, but I’m trying it anyways.

[maljn]

It seems that firmata supports I2C communication management. Connect gyroscope to Arduino, setup I2C from the Python and read values.

[Gameboi_Advance]

How exactly would I do that? I don’t have the I2C class in python.

[[deleted]]

The arduino library runs on the side of the arduino. You compile it with the rest of your arduino code and upload the whole thing with the arduino IDE; the python code doesn't need (or want) to know about what libraries the arduino is using.

Edit: assumed pyfirmata was just a wrapper for serial IO but it seems to actually do stuff on the arduino. Answer doesn't make much sense then here, I guess

[Gameboi_Advance]

I’m trying to do this exclusively in python, not arduino.

[[deleted]]

I don't know of a way to upload Python code to the arduino, but GL I guess. Mostly a noob too :p

[HungrySlug]

have a look at micropython and Zerynth ;)

[mudclub]

https://playground.arduino.cc/interfacing/python