Stm32 serial port sends 2048 data.

The sending speed is too slow, and there is not enough memory.

1, the sending speed is too slow: when STM32 serial port sends a large amount of data, the sending speed is too slow, which will lead to a long sending time. This is because the rate of sending data by serial port is limited, or the amount of data sent is too large, which exceeds the capacity of serial port.

2. Insufficient memory: When STM32 serial port sends a large amount of data, insufficient memory will lead to transmission failure or data loss. This means that when sending data, you need to occupy a certain amount of memory space, and you can't send data without enough memory.