Fix WinForms Serial Port Garbled Text

If you encounter garbled characters in WinForm serial communication, you can try the following methods to resolve it:

1. Set the correct serial port parameters: make sure that the baud rate, data bits, parity bit, and stop bit settings match the device.
2. Decode the received byte data using the correct encoding method, such as UTF-8 or ASCII, before reading the serial port data.
3. To handle the data sticking problem: if there is data sticking phenomenon in the received data, it can be resolved by setting up data packet headers and data packet endings to split and assemble the data.
4. Increase the delay time: Before reading data, increase an appropriate delay time to ensure that the data is fully received.
5. Read the data byte by byte: You can try reading the data byte by byte to avoid missing or shifting bytes while reading data.
6. Check the wiring and hardware: Ensure the serial port connection and device interface are well-contacted, and verify that the hardware connection is functioning properly.
7. Try using other serial port debugging tools, such as Tera Term or RealTerm, to verify if the serial communication is working properly before proceeding with WinForm development.

If the above methods still do not solve the problem, it may be necessary to check the driver of the serial port device or contact the device manufacturer to confirm whether the serial communication protocol and data format are correct.