Bifferboard Index
Control the GPIO ports on the Bifferboard
(NB! GPIO 2 is i2c SCL, GPIO 3 is i2c SDA)


Switch the extension board green led (gpio 0)
(led wired to plus)
Switch the extension board red led (gpio 1)
(led wired to plus)
Switch the Bifferboard surface mount red led (gpio 5)
(led wired to earth)

Test the button state -(gpio 4)