hydro rosserial python with groovy Arduino error

[inmoovmark]

Hi Python Community helpers,

I'm a newbie to this forum,

I'm running utunbu 16.04 and ROS, and I'm trying to get ROSSERIAL working (ROS communicating with Arduino Mega 2560) but failed in doing so,

it is on port ttyACM0 (Utunbu can see this serial port of Arduino Mega 2560 but I'm just unable to connect to it),

I ran roscore

and then I ran the below command:

rosrun rosserial_python serial_node.py _port:=/dev/ttyACM0 _baud:=9600

and I got the below error: (really not sure what that means and what to do to resolve it, however I can upload a sketch from the Arduino IDE with no issues, is just with the above line, I'm not able to make any connections...)



Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino


Attached screenshot,

Thank you and I look forward to your reply,

Roger