Turn Raspberry Pi LED On and Off

This example shows how to turn the on-board LED on and off.

Create a connection to the Raspberry Pi™ hardware usingraspi.

mypi = raspi

mypi = raspi with properties: DeviceAddress: 'raspberrypi-computername' Port: 18725 BoardName: 'Raspberry Pi Model B Rev 2' AvailableLEDs: {'led0'} AvailableDigitalPins: [4 14 15 17 18 22 23 24 25 27 30 31] AvailableSPIChannels: {} AvailableI2CBuses: {'i2c-0' 'i2c-1'} I2CBusSpeed: 100000 Supported peripherals

TheAvailableLEDsproperty shows the name of the user-controllable LED.

To show the location of the user-controllable LED on the board, useshowLEDs.

showLEDs(mypi)

Turn the specified LED on by setting its value to1ortrue.

writeLED(mypi,'led0',1)

Turn the LED off by setting its value to0orfalse.

writeLED(mypi,'led0',false)

To restore the LED to its default purpose, which is to indicate SD card activity, restart the Raspberry Pi hardware.