rosserial_arduino error

asked 2012-02-28 21:35:30 -0500

Kevin
2440 ● 43 ● 70 ● 102
http://www.ros.org/

updated 2012-03-01 21:38:14 -0500

I am using OSX 10.7.3 with Arduino IDE 1.0

When I followed the directions to install rosserial from source, I did: hg clone https://kforge.ros.org/rosserial/hg rosserial. Everything compiled and I copied the ros_lib folder to my Arduino/Library folder. However when I try to compile any of the included example program (e.g., Hello World), it fails with the following error:

  In file included from /Users/kevin/Documents/Arduino/libraries/ros_lib/ros.h:39,
             from HelloWorld.cpp:6:
  /Users/kevin/Documents/Arduino/libraries/ros_lib/ArduinoHardware.h:38:22: error: WProgram.h: No such file or directory
  In file included from /Users/kevin/Documents/Arduino/libraries/ros_lib/ros.h:39,
             from HelloWorld.cpp:6:
  /Users/kevin/Documents/Arduino/libraries/ros_lib/ArduinoHardware.h: In member function 'long unsigned int ArduinoHardware::time()':
  /Users/kevin/Documents/Arduino/libraries/ros_lib/ArduinoHardware.h:73: error: 'millis' was not declared in this scope

A quick look at the release notes for Arduino says:

The WProgram.h file, which provides declarations for the Arduino API, has been renamed to Arduino.h. To create a library that will work in both Arduino 0022 and Arduino 1.0, you can use an #ifdef that checks for the ARDUINO constant, which was 22 and is now 100. For example:

 #if defined(ARDUINO) && ARDUINO >= 100
 #include "Arduino.h"
 #else
 #include "WProgram.h"
 #endif

Am I grabbing out dated code from the wrong CVS??? This change to Arduino was made a while ago, so I don't understand how I am the first to find it. Thanks!

[UPDATE 1]

I loaded the "hello world" sketch onto my Arduino, but now it crashes with :

[kevin@TARDIS ~]$ rosrun rosserial_python serial_node.py /dev/cu.usbserial-A4001lNd
Traceback (most recent call last):
File "/Users/kevin/ros_sandbox/rosserial/rosserial_python/nodes/serial_node.py", line 40, in <module>
from rosserial_python import SerialClient
File "/Users/kevin/ros_sandbox/rosserial/rosserial_python/src/rosserial_python/__init__.py", line 1, in <module>
from SerialClient import *
File "/Users/kevin/ros_sandbox/rosserial/rosserial_python/src/rosserial_python/SerialClient.py", line 42, in <module>
from serial import *
ImportError: No module named serial

Am I missing a dependency?

[UPDATE 2]

I figured out I needed to do:

pip install pyserial

But now it fails with:

[kevin@TARDIS rosserial]$ rosrun rosserial_python serial_node.py  /dev/cu.usbserial-A4001lNd
[INFO] [WallTime: 1330658506.244201] ROS Serial Python Node
[INFO] [WallTime: 1330658506.251605] Connected on /dev/cu.usbserial-A4001lNd at 57600 baud
[INFO] [WallTime: 1330658508.750410] Note: publish buffer size is 280 bytes
[INFO] [WallTime: 1330658508.750905] Setup publisher on chatter [std_msgs/String]
[INFO] [WallTime: 1330658512.739698] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1330658517.747113] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1330658519.745485] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1330658526.749475] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1330658529.758370] Packet Failed :  Failed to read msg data
Traceback (most recent call last):
  File "/Users/kevin/ros_sandbox/rosserial/rosserial_python/nodes/serial_node.py", line 58, in <module>
    client.run()
  File "/Users/kevin/ros_sandbox/rosserial/rosserial_python/src/rosserial_python/SerialClient.py", line 280, in run
    checksum = sum(map(ord,header) ) + sum(map(ord, msg)) + ord(chk)
TypeError: ord() expected a character, but string of length 0 found

So what is this?