i set the address Parameter to 96 and it worked. Now i can start the node.
Only thing that still doesn´t work is the “move” command:
rostopic pub /pca9685_node/command std_msgs/Int32MultiArray “ {data: [-1, -1, -1, -1, -1, -1, -1, -1, 32767, 65535, 0, -1, -1, -1, -1, -1]}”
i can run it and then it Displays me : Publishing and latching message
… but still no motor reacts.
The pin layout is exactly the same like in the c programm i used. So i tryed to use the rqt_graph to maybe find the mistake (i litterly just started using ros). It shows me this Picture:
Shouldn`t there only be one node running?
Thank you for your fast help and your Patience with me
Hi,
Can you verify that you actually launched the node in the “/pca9685_node” namespace? Topics don’t get namespaced unless you specify one with e.g. ns=“pca9685_node” in the launch file, and even then I would suggest calling it something more human-readable e.g. ns=“pwm_driver”.
Can you do a “rostopic list” and post the output?
The “rostopic” command creates a temporary node of its own so that is normal.
I appreciate that you two are helping each other out, that’s great, but perhaps it is better done via DM, or on answers.ros.org, or on git issue. When you use discourse everyone to has ever commented on the thread gets and e-mail.
Hello, I am new to ROS and was planning to use this for a project of mine. Do I need python 3 support to use this package? The idea of my project is to control a servo arm using a PCA9685 servo hat connected to a raspberry pi 4 with a 4GB Jetson nano. Also if I do need python 3, how do I install packages using python 3?
