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I mean I get two callbacks in my subscribed node (callback1 and callback 2) ... I want to print "Hello" only when both callbacks are triggered.... for example if callback 1 is received data but callback2 dint received any data then "Hello" should not print on terminal log
is it possible?
Have you seen message filters? http://wiki.ros.org/message_filters
You can attach a callback to run when two messages are received.
Alternatively you can store a state variable that is set by one callback and checked and cleared by a second (with an optional timeout).
there are tho only two ways, with the local var you have to proper protet the variable with an mutex, otherwise magic can happen
Asked: 2020-12-30 23:44:09 -0500
Seen: 164 times
Last updated: Dec 31 '20
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