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b2175f5e31ea

Modbus RTU: initialised default state of baudrate and parity.

rt_task_delete(&UART_task);

rt_task_join(&UART_task);

closeserial(UART_fd);

gpio_close(RS485_GPIO_dev);

rt_mutex_delete(&UART_WriteMutex);

rt_mutex_delete(&UART_ReadMutex);