[ERROR] [1609499721.772979]: Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino

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I am trying to communicate with STM32F030 R8 Nucleo board with PC through rosserial. I followed the following link: [https://github.com/yoneken/rosserial_...] for STM32 rosserial. The provided link is for STM32F3xx, 4xx, and 7xx series, I converted it for my nucleo board (i.e., STM32F030) .

I am using ROS Noetic in Ubuntu 20.04. And used this ROS serial pkg [https://github.com/ros-drivers/rosserial] . The USB port and baud rate are also correct (i.e., /dev/ttyACM0 and 57600 respectively). while running: rosrun rosserial_python serial_node.py I am getting this error.