Pixy2 install with Raspberry pi 4 issue

edge · July 23, 2021, 2:11am

Hello,
Can you copy and paste the error you receive?

Edward

Handler_H · July 23, 2021, 9:05pm

No file or directory when trying to build that line of code.

freed · July 23, 2021, 10:54pm

Hi, it looks like the root cause is the fatal error after the first command. You need to delete the pixy2 directory before running git clone, otherwise it will fail to copy all the files over.

Try running rmdir -r pixy2 and then following the instructions again. If it complains, you may need to run it as root: sudo rmdir -r pixy2

Let us know what happens, thanks!

Handler_H · July 25, 2021, 7:36pm

I tried doing that but it doesn’t work, here is the image:

freed · July 26, 2021, 11:43pm

OK, try it without the -r flag: rmdir pixy2

edge · July 28, 2021, 1:07pm

Hello,
I think you might try

sudo rm -rf pixy2

Edward

Handler_H · July 31, 2021, 12:06am

After I deleted the pixy2 file, I now try to install pixy2 files from the forum provided by pixy2. Once I get to the line for cloning pixy2, I get an error, I am not sure what could be wrong?

edge · July 31, 2021, 12:05pm

Hello,
It appears to be a networking issue on your Pi. This site might help:

This is Pi-related configuration.

Edward

Handler_H · July 31, 2021, 10:38pm

Continuing the discussion from Pixy2 install with Raspberry pi 4 issue:

Okay that worked but now I have a question on how do I run the pixy 2. I looked online and I find a lot of arduino examples, I am looking for raspberry pi with python examples. I am trying to make the robot being able to follow a person wether it’s color or barcode. I just don’t know how to code that in raspberry pi with python. Any help on this would be appreciated and I want to say thanks for all the help I have been getting!

edge · August 3, 2021, 12:57pm

Hello,
You are talking about tracking an object. The pan-tilt demo is a tracking example. It’s in the libpixyusb2 distro that you installed and built.

It’s a good starting point, so get familiar with how to write a control loop and track an object with Pixy.

Hope this helps

Edward

Handler_H · August 4, 2021, 11:22pm

Does pixy2 only run codes with c language? I want to integrate that example into my python code, what can I do?

edge · August 5, 2021, 3:35am

Hello,
Here is the python version.

github.com

charmedlabs/pixy2/blob/master/src/host/libpixyusb2_examples/python_demos/pan_tilt_demo.py

from __future__ import print_function
import pixy
from ctypes import *
from pixy import *

# Pixy2 Python SWIG pan/tilt demo #

# Constants #
PID_MAXIMUM_INTEGRAL      =  2000
PID_MINIMUM_INTEGRAL      = -2000
ZUMO_BASE_DEADBAND        =    20
PIXY_RCS_MAXIMUM_POSITION =  1000
PIXY_RCS_MINIMUM_POSITION =     0
PIXY_RCS_CENTER_POSITION  = ((PIXY_RCS_MAXIMUM_POSITION - PIXY_RCS_MINIMUM_POSITION) / 2)
MINIMUM_BLOCK_AGE_TO_LOCK =    30
PAN_GAIN                  =   400
TILT_GAIN                 =   500

def Reset ():
  global Locked_On_Block

This file has been truncated. show original

It is part of the python distribution:
https://docs.pixycam.com/wiki/doku.php?id=wiki:v2:building_libpixyusb_as_a_python_module_on_linux

Hope this helps

Edward

Handler_H · August 6, 2021, 7:36pm

I been getting errors when trying to run that code. Any idea why?

edge · August 8, 2021, 3:11am

Hello,
You are using an IDE that I’m not familiar with. Try to run it from a bash prompt and let me know what you find.

Edward

Handler_H · August 11, 2021, 1:46pm

How do I run it on bash prompt, I am sorry but I am new to Linux on raspberry pi as well. I do appreciate your kind help.

Handler_H · August 11, 2021, 1:49pm

Never mind I got the python example demos working on geany but it didn’t work on thonny ide. An issue I am having right now is when I run the python demo, I also run pixymon on my raspberry pi, but it can’t do both at the same time. I get segmentation fault. Using the pixy with the raspberry pi, has been very stressful. So many problems, one after another. If I can get direct help, I would appreciate it.

Handler_H · August 13, 2021, 2:09am

Any help regarding this?? Anyone? I can’t run pixymon and compile code together on raspberry pi? Any solutions??

edge · August 13, 2021, 4:01am

Hello,
Unfortunately, you can’t run the demos and Pixymon at the same time since they use the same USB port.

Regarding the bash prompt, this is what is commonly referred to as a command prompt or “shell”. (what you type linux commands into.)

Edward

Handler_H · August 13, 2021, 10:22pm

So how can I then see if the object tracking when code running and detecting correctly if I can’t use pixymon?

edge · August 14, 2021, 3:20am

Hello,
You will normally just run your client code, and run Pixymon to either verify that it is tracking the objects you intended, and/or if you need to change the models, or parameters.

Edward