how to get the latest sensor reading with a subscriber callback takes 3 to 4 seconds
Hello,
I am using simple package to control nao robot with an EEG sensor
I made two nodes as following
1- Publisher that is reading the sensor values and publish it to a topic called /emoState 2- Subscriber which is reading the values published in the /emoState topic and then move the NAO robot depends on the signal the call back process for a single signal is around 4 seconds
THE PROBLEM IS the subscriber is using the old messages rather than the latest message published by the publisher
how can I make the subscriber to get the latest value published ?
Hello ShehabAldeen, could you please provide the lines in which you define your publisher and subscriber.