Simple Power Indicator Script?

This should be nice and simple to do :)

First you want to create a script which sets the LedBorg to blue.
This can be based on LedBorg: lesson 1, but you do not need the delay or to turn the LedBorg off at the end.

You should end up with something like this:

#!/usr/bin/env python
 
# Import the library functions we need
import time
import wiringpi2 as wiringpi
wiringpi.wiringPiSetup()
 
# Setup the LedBorg GPIO pins
PIN_RED = 0
PIN_GREEN = 2
PIN_BLUE = 3
wiringpi.pinMode(PIN_RED, wiringpi.GPIO.OUTPUT)
wiringpi.pinMode(PIN_GREEN, wiringpi.GPIO.OUTPUT)
wiringpi.pinMode(PIN_BLUE, wiringpi.GPIO.OUTPUT)
 
# Set the colour channels (1 is on, 0 is off)
red = 0
green = 0
blue = 1
 
# Set the LedBorg colour
wiringpi.digitalWrite(PIN_RED, red)
wiringpi.digitalWrite(PIN_GREEN, green)
wiringpi.digitalWrite(PIN_BLUE, blue)
print 'LedBorg on'

I would recommend making the file in the cd ~/ledborg directory. Save it as something like powerLed.py.

Next edit the startup script for the pi: sudo nano /etc/rc.local. You want to add a new line just above the exit command to run this new script.

The bottom of the file should end up looking something like this:

sudo /home/pi/ledborg/powerLed.py &
exit 0

At this point the blue LED should come on when the Raspberry Pi is started :)

From memory that is all you need to do, I think the GPIO pins are switched off when the Raspberry Pi is shutdown anyway, which will make the LedBorg turn off.