device Serial Number
Get the serial number for the Adafruit Circuit Playground Express
control.deviceSerialNumber()The system software in your board creates a unique number to identify the board. You can use this number in your program if you want to know which board is running your program.
Returns
- a number that is created to uniquely identify this board.
Example
Write the board serial number to the serial port.
serial.writeValue("serialnumber", control.deviceSerialNumber());