Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Rosserial - unpack requires a string argument of length 2

rosserial_arduino

asked 2014-05-05 12:43:52 -0500

pascalmater
1 ●1 ●1 ●1

Hi There, After following the 'Arduino IDE Setup' tutorial (Installing from Source onto the ROS workstation in Groovy) and the 'Hello world' example the following messages were generated:

[INFO] [WallTime: 1399293681.961019] ROS Serial Python Node [INFO] [WallTime: 1399293681.972199] Connecting to /dev/ttyUSB0 at 57600 baud [ERROR] [WallTime: 1399293684.083353] Creation of publisher failed: unpack requires a string argument of length 2 [ERROR] [WallTime: 1399293699.088810] Lost sync with device, restarting...

Is there a mismatch (incompatible) of software versions? I am using Ubuntu 12.04 LTS, rosversion roscpp 1.9.50 and a Arduino Uno

Regards.

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2014-05-07 16:30:19 -0500

pascalmater
1 ●1 ●1 ●1

Found a solution: In the 'Arduino IDE Setup' tutorial were it states 'git clone https://github.com/ros-drivers/rosser... add '-b groovy-devel'. So that line should read: 'git clone https://github.com/ros-drivers/rosserial -b groovy-devel' This will check out the code from the goovy-delep branch. The rest stays the same.

Maybe, this is worthwhile adding to this tutorial for us less experienced.

edit flag offensive delete link

add a comment

Question Tools

Stats

Asked: 2014-05-05 12:43:52 -0500

Seen: 634 times

Last updated: May 07 '14

Rosserial - unpack requires a string argument of length 2 edit

1 Answer

Question Tools

Stats

Related questions

Rosserial - unpack requires a string argument of length 2