How to call callback function?

[kfbixc]

Hello:
your diff_tf.cpp has ros::spinOnce() so I know how to call Odometry_calc::leftencoderCb() and Odometry_calc::rightcoderCb().

      But I found your diff_tf.py and pid_velocity.py don't rospy.spinOnce().I wonder how to call callback function?

      Looking forward to your reply.Thank you.

[qboticslabs]

Hi KFBIT

Thanks for pointing this, Can you please check this node working without spinOnce()? I got it working and please get back to me if it is not working in your side. I will correct the code then

Regards
Lentin Joseph