Hi, I also got the same error, in my case it was the simple mistake of reading from a wrong serial port. I had two usb serial connections for two sensors and their hardware device formation on ubuntu tty/ACM* got interchanged. Just changing the devices worked for me. --- [Visit Topic](https://discourse.ros.org/t/mismatched-protocol-version-in-packet-lost-sync-or-rosserial-python-is-from-different-ros-release-than-the-rosserial-client/3450/2) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: