What is cts and rts?

CTS (Clear To Send) and RTS (Request To Send) are control signals used in serial communication protocols, particularly in the context of UART (Universal Asynchronous Receiver-Transmitter). RTS is sent by a device to indicate that it is ready to send data, while CTS is sent by the receiving device to confirm that it is ready to receive data. This handshake mechanism helps to prevent data loss by ensuring that devices are synchronized during transmission.