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I tried to putting it in the global scope .But it still does not show the output in the serial monitor. If I remove all the

ros::NodeHandle nh; and nh from the code it shows output in serial monitor but the ros does publich the data.

I tried to putting it in the global scope .But it still does not show the output in the serial monitor. If I remove all the

ros::NodeHandle nh; and nh from the code it shows output in serial monitor but the ros does publich the data.

I also tried removing all serial prints it shows this error: [ERROR] [WallTime: 1450757476.810495] Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino