Keyestudio EASY PLUG Ultimate Starter Kit Manual page 42

39
Print the specified number in hexademical format on
5
newline of monitor.
If the serial port is available, it returns true,
6 otherwise returns false.
(generally used in Bluetooth communication)
7 Returns a string in serial port
A string read from serial port to a string variable,
8
pause until read the specified character.
Read the serial data by byte (generally used to read
9
the value sent from Bluetooth) (delete the data has
been read)