Unable to sync with device
hello, i've tried this tutorial but when i rosrun rosserial_python serial_node.py /dev/ttyACM1
or rosrun rosserial_python serial_node.py _port:=/dev/ttyACM1
(my port is ttyACM1), the result is
[INFO] [WallTime: 1464200241.928070] ROS Serial Python Node
[INFO] [WallTime: 1464200241.933151] Connecting to /dev/ttyACM1 at 9600 baud
[ERROR] [WallTime: 1464200259.039163] Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino
i'm sure that my rosserial is in indigo and i've tried installed again following this tutorial. the result still the same. though, i remember, a few weeks before, i've tried rosserial with HelloWorld and it was successful. so i really wonder why right know i got this kind of error '-' Help Please!!
anyway, i'm using Ubuntu 14.04.1 with ROS Indigo