Hello Everyone, I am new to ROS, I would like to ask for help with my problem: I am using Teensy 3.6, I always have problem with communication, I fixed some and last week It was working normally. This week I start to receive this error when I run my Teensy as ROS node [INFO] [WallTime: 1513632615.825940] Protocol version of client is unrecognized, expected Rev 1 (rosserial 0.5+) [INFO] [WallTime: 1513632616.391569] wrong checksum for msg length, length -257 [INFO] [WallTime: 1513632616.391837] chk is 4 [INFO] [WallTime: 1513632616.955837] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632616.956110] chk is 255 [INFO] [WallTime: 1513632617.520817] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632617.521132] chk is 255 [INFO] [WallTime: 1513632618.092081] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632618.092400] chk is 255 [INFO] [WallTime: 1513632618.653598] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632618.653886] chk is 255 [INFO] [WallTime: 1513632619.218930] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632619.219191] chk is 4 [INFO] [WallTime: 1513632619.780296] wrong checksum for topic id and msg [INFO] [WallTime: 1513632620.348411] wrong checksum for msg length, length 4 [INFO] [WallTime: 1513632620.348672] chk is 4 [INFO] [WallTime: 1513632620.910055] wrong checksum for topic id and msg [INFO] [WallTime: 1513632621.474895] wrong checksum for msg length, length 0 [INFO] [WallTime: 1513632621.475235] chk is 127 [ERROR] [WallTime: 1513632622.044584] Mismatched protocol version in packet: lost sync or rosserial_python is from different ros release than the rosserial client any help would be appreciated, Thank you so much, Best, Moaed --- [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/3450/1) 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: