Daniel_2210's profile - activity

I have fixed it. What you need to do is.

The "Hello World" example seems to be working fine. The only change you must to your Arduino code on Micro or just the normal one, I only have a Micro is to add

#define USE_USBCON

just before

#include <ros.h>

That's it.

I have already reinstalled ROS now and that still didn't fixed it.

Hi all,

I have a problem with rosserial_arduino. The demo hello world program compiles fine in the arduino IDE.

#include <ros.h>
#include <std_msgs/String.h>

ros::NodeHandle  nh;

std_msgs::String str_msg;
ros::Publisher chatter("chatter", &str_msg);

char hello[13] = "hello world!";

void setup()
{
  nh.initNode();
  nh.advertise(chatter);
}

void loop()
{
  str_msg.data = hello;
  chatter.publish( &str_msg );
  nh.spinOnce();
  delay(1000);
}

The problem that I have is that ros can't connect to the arduino.

When I run this "rosrun rosserial_python serial_node.py /dev/ttyACM0" I get the error:

[INFO] [WallTime: 1399983521.604184] ROS Serial Python Node
[INFO] [WallTime: 1399983521.617853] Connecting to /dev/ttyACM0 at 57600 baud
[ERROR] [WallTime: 1399983538.726124] Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino

When I run this "rosrun rosserial_server serial_node /dtyACM0" I get these messsages:

[ INFO] [1399983906.306684433]: Opening serial port.
[ INFO] [1399983906.306988104]: Starting session.
[ WARN] [1399983907.309690537]: Sync with device lost.

I also have added my user to the usergroups dialout and tty. That fixes the problem that I can access the port without admin(sudo) right.

I use this in combination with an Arduino Micro but it's the same as an Arduino Uno but then a bit smaller.

I hope you can help me with my problem.