adafruit / adafruit_python_pca9685

Python code to use the PCA9685 PWM servo/LED controller with a Raspberry Pi or BeagleBone black.

!! DEPRECATED !!

This library is deprecated and has been archived. Please use the new library here: https://github.com/adafruit/Adafruit_CircuitPython_PCA9685

Adafruit Python PCA9685

Python code to use the PCA9685 PWM servo/LED controller with a Raspberry Pi or BeagleBone black.

Installation

To install the library from source (recommended) run the following commands on a Raspberry Pi or other Debian-based OS system:

sudo apt-get install git build-essential python-dev
cd ~
git clone https://github.com/adafruit/Adafruit_Python_PCA9685.git
cd Adafruit_Python_PCA9685
sudo python setup.py install

Alternatively you can install from pip with:

sudo pip install adafruit-pca9685

Note that the pip install method won't install the example code.

adafruit_python_pca9685's Issues

I can't run this with Python 3? (Raspberry Pi)

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  • If you are receiving an ImportError: No module named... error then a
    library the code depends on is not installed. Check the tutorial/guide or
    README to ensure you have installed the necessary libraries. Usually the
    missing library can be installed with the pip tool, but check the tutorial/guide
    for the exact command.

  • Be sure you are supplying adequate power to the board. Check the specs of
    your board and power in an external power supply. In many cases just
    plugging a board into your computer is not enough to power it and other
    peripherals.

  • Double check all soldering joints and connections. Flakey connections
    cause many mysterious problems. See the guide to excellent soldering for examples of good solder joints.

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): INSERT PLATFORM/OPERATING
  SYSTEM HERE

• Python version (run python -version or python3 -version): INSERT PYTHON
  VERSION HERE

• Error message you are receiving, including any Python exception traces: INSERT
  ERROR MESAGE/EXCEPTION TRACES HERE*

• List the steps to reproduce the problem below (if possible attach code or commands
  to run): LIST REPRO STEPS BELOW

setuptools-3.5.1.zip download not working

Install procedure via download of https://pypi.python.org/packages/source/s/setuptools/setuptools-3.5.1.zip does not work anymore. It's not hosted there anymore.

pi@raspberrypi:~/Adafruit_Python_PCA9685 $ sudo python setup.py install
Downloading https://pypi.python.org/packages/source/s/setuptools/setuptools-3.5.1.zip
Extracting in /tmp/tmpYeIU5n
Traceback (most recent call last):
File "setup.py", line 4, in
...
zipfile.BadZipfile: File is not a zip file

How to control the rotation angle

Thank you for opening an issue on an Adafruit Python library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:

• Do not use GitHub issues for troubleshooting projects and issues. Instead use
  the forums at http://forums.adafruit.com to ask questions and troubleshoot why
  something isn't working as expected. In many cases the problem is a common issue
  that you will more quickly receive help from the forum community. GitHub issues
  are meant for known defects in the code. If you don't know if there is a defect
  in the code then start with troubleshooting on the forum first.

• If following a tutorial or guide be sure you didn't miss a step. Carefully
  check all of the steps and commands to run have been followed. Consult the
  forum if you're unsure or have questions about steps in a guide/tutorial.

• For Python/Raspberry Pi projects check these very common issues to ensure they don't apply:

  • If you are receiving an ImportError: No module named... error then a
    library the code depends on is not installed. Check the tutorial/guide or
    README to ensure you have installed the necessary libraries. Usually the
    missing library can be installed with the pip tool, but check the tutorial/guide
    for the exact command.

  • Be sure you are supplying adequate power to the board. Check the specs of
    your board and power in an external power supply. In many cases just
    plugging a board into your computer is not enough to power it and other
    peripherals.

  • Double check all soldering joints and connections. Flakey connections
    cause many mysterious problems. See the guide to excellent soldering for examples of good solder joints.

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): INSERT PLATFORM/OPERATING
  SYSTEM HERE

• Python version (run python -version or python3 -version): INSERT PYTHON
  VERSION HERE

• Error message you are receiving, including any Python exception traces: INSERT
  ERROR MESAGE/EXCEPTION TRACES HERE*

• List the steps to reproduce the problem below (if possible attach code or commands
  to run): LIST REPRO STEPS BELOW

Could not determine default I2C bus for platform

Rappy Pi 3B+
python simpletest.py err

No full on & full off mode?

One of often used features of PCA9685 IC is full on and full off mode of its outputs (bit 4 of LEDn_ON_H and bit 4 of LEDn_OFF_H registers). The library should allow using all features of the IC.

ls

Thank you for opening an issue on an Adafruit Python library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:

• Do not use GitHub issues for troubleshooting projects and issues. Instead use
  the forums at http://forums.adafruit.com to ask questions and troubleshoot why
  something isn't working as expected. In many cases the problem is a common issue
  that you will more quickly receive help from the forum community. GitHub issues
  are meant for known defects in the code. If you don't know if there is a defect
  in the code then start with troubleshooting on the forum first.

• If following a tutorial or guide be sure you didn't miss a step. Carefully
  check all of the steps and commands to run have been followed. Consult the
  forum if you're unsure or have questions about steps in a guide/tutorial.

• For Python/Raspberry Pi projects check these very common issues to ensure they don't apply:

  • If you are receiving an ImportError: No module named... error then a
    library the code depends on is not installed. Check the tutorial/guide or
    README to ensure you have installed the necessary libraries. Usually the
    missing library can be installed with the pip tool, but check the tutorial/guide
    for the exact command.

  • Be sure you are supplying adequate power to the board. Check the specs of
    your board and power in an external power supply. In many cases just
    plugging a board into your computer is not enough to power it and other
    peripherals.

  • Double check all soldering joints and connections. Flakey connections
    cause many mysterious problems. See the guide to excellent soldering for examples of good solder joints.

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): INSERT PLATFORM/OPERATING
  SYSTEM HERE

• Python version (run python -version or python3 -version): INSERT PYTHON
  VERSION HERE

• Error message you are receiving, including any Python exception traces: INSERT
  ERROR MESAGE/EXCEPTION TRACES HERE*

• List the steps to reproduce the problem below (if possible attach code or commands
  to run): LIST REPRO STEPS BELOW

Relies on deprecated Adafruit_GPIO.Platform for RPI4 support

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.):

Hardware : BCM2711
Revision : d03114
Serial : 1000000098966e85
Model : Raspberry Pi 4 Model B Rev 1.4

'Linux-5.10.52-1-ARCH-armv7l-with-glibc2.32'

• Python version (run python -version or python3 -version):

Python 3.9.6

• Error message you are receiving, including any Python exception traces:

pwm = Adafruit_PCA9685.PCA9685()
File "/usr/lib/python3.9/site-packages/Adafruit_PCA9685/PCA9685.py", line 74, in init
self._device = i2c.get_i2c_device(address, **kwargs)
File "/usr/lib/python3.9/site-packages/Adafruit_GPIO/I2C.py", line 63, in get_i2c_device
busnum = get_default_bus()
File "/usr/lib/python3.9/site-packages/Adafruit_GPIO/I2C.py", line 55, in get_default_bus
raise RuntimeError('Could not determine default I2C bus for platform.')

- List the steps to reproduce the problem below (if possible attach code or commands
  to run): 

Create a pwm PCA9685 device on a Raspberry Pi 4.

PCA9685 -> gets the i2c device 
I2C.py -> gets_default_bus device (if not specified) via Platform.py
Platform.py -> case matches /proc/cpuinfo to RPI platforms but does not include BCM2711 as a match case

Adafruit_GPIO is deprecated so I presume you are no longer accepting pull requests to update the platform identification to support the RPI4.  Will the PCA9685 library be rewritten to leverage the replacement of the GPIO library?

Why frequency overshoot is not patched in Python version?

First of all, I don't own a scope to verify this.

But by reading the code between Python version and Arduino version, it seems that frequency overshoot patch has not applied in Python version library.

I can't get the drivers to install on my Raspberry Pi. If I use pip install I get:

Thank you for opening an issue on an Adafruit Python library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:

• Do not use GitHub issues for troubleshooting projects and issues. Instead use
  the forums at http://forums.adafruit.com to ask questions and troubleshoot why
  something isn't working as expected. In many cases the problem is a common issue
  that you will more quickly receive help from the forum community. GitHub issues
  are meant for known defects in the code. If you don't know if there is a defect
  in the code then start with troubleshooting on the forum first.
• If following a tutorial or guide be sure you didn't miss a step. Carefully
  check all of the steps and commands to run have been followed. Consult the
  forum if you're unsure or have questions about steps in a guide/tutorial.
• For Python/Raspberry Pi projects check these very common issues to ensure they don't apply:
  • If you are receiving an ImportError: No module named... error then a
    library the code depends on is not installed. Check the tutorial/guide or
    README to ensure you have installed the necessary libraries. Usually the
    missing library can be installed with the pip tool, but check the tutorial/guide
    for the exact command.
  • Be sure you are supplying adequate power to the board. Check the specs of
    your board and power in an external power supply. In many cases just
    plugging a board into your computer is not enough to power it and other
    peripherals.
  • Double check all soldering joints and connections. Flakey connections
    cause many mysterious problems. See the guide to excellent soldering for examples of good solder joints.

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): INSERT PLATFORM/OPERATING
  SYSTEM HERE
• Python version (run python -version or python3 -version): INSERT PYTHON
  VERSION HERE
• Error message you are receiving, including any Python exception traces: INSERT
  ERROR MESAGE/EXCEPTION TRACES HERE*
• List the steps to reproduce the problem below (if possible attach code or commands
  to run): LIST REPRO STEPS BELOW

How to use it to control the rotation angle and speed of a 180 degree servo?

and can i change the parameters in the function 'set_servo_pulse'?

Issues communicating via I2C: BBB --> PCA9685

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): Linux beaglebone 4.14.71-ti-r80

• Python version (run python -version or python3 -version): Python 2.7.13

• Error message you are receiving, including any Python exception traces:
  Traceback (most recent call last):
  File "/var/lib/cloud9/Adafruit_Python_PCA9685/examples/simpletest.py", line 17, in
  pwm = Adafruit_PCA9685.PCA9685()
  File "/usr/local/lib/python2.7/dist-packages/Adafruit_PCA9685-1.0.1-py2.7.egg/Adafruit_PCA9685/PCA9685.py", line 75, in init
  self.set_all_pwm(0, 0)
  File "/usr/local/lib/python2.7/dist-packages/Adafruit_PCA9685-1.0.1-py2.7.egg/Adafruit_PCA9685/PCA9685.py", line 111, in set_all_pwm
  self._device.write8(ALL_LED_ON_L, on & 0xFF)
  File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 116, in write8
  File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 256, in write_byte_data
  IOError: [Errno 16] Device or resource busy

• List the steps to reproduce the problem below (if possible attach code or commands
  to run):
  Using BBB channel I2C-2 (P9_19 & P9_20), attach I2C connections to PCA9685 development board.
  Using Adafruit_Python_PCA9685 library, run example program: simpletest.py

NVIDIA Jetson TK1 support

Hello,

Can you please add support for the TK1/TX1/TX2 platforms?

Thanks,

importerror no module named 'adafruit pca9685

i am using putty and remote desktop to connect to raspberry pi
when i run program with Adafruit_PCA9685 in putty command line that uses python 2.7 it runs the program but when when i use python 3.5.3 shell it gives import error
i did every thing this conversation says
but
SAME ERROR
"importerror no module named 'adafruit pca9685'"

How to call software_reset() function Adafruit_Python_PCA9685 ?

How to call software_reset() function Adafruit_Python_PCA9685 ?