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                                            DeepakKumarShah

Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino

https://github.com/ros-drivers/rosserial/issues/354 try this if you are using esp, may be it will solve the problem.

NodeMCU ESP32 : Protocol version of client is unrecognized, expected Rev 1 (rosserial 0.5+)

@sujoy743175 https://github.com/ros-drivers/rosserial/issues/354 here some people seem to have solved this problem. If you understand their there discussion then please explain me too, I am not good at programming.

NodeMCU ESP32 : Protocol version of client is unrecognized, expected Rev 1 (rosserial 0.5+)

It solved my problem. ![temp1](https://user-images.githubusercontent.com/56379415/133751928-efb85ff3-fd51-4a03-bbd2-90011607824c.png)