0 Replies Latest reply on Feb 19, 2016 7:05 AM by joe-iot

    Blinking an LED with Galileo Gen 2 and Python


      With  embedded widgets blinking an LED is the equivalent of "Hello World".  I could not find an example of using python to blink an LED here so I thought I would share this. Hopefully this will save someone some time when they want to blink an LED using MRAA and Python.  I have only used/tested this with the Galileo Gen 2 built with the EGLIBC image: http://downloadmirror.intel.com/25384/eng/iot-devkit-201510010757-mmcblkp0-galileo.direct.xz.


      0 . First is to install mraa

      opkg update 
      opkg install mraa


      1. Next you open python and import MRAA.

      import mraa


      2. Then initialize the pin, in this example I am using digital pin 12.

      pin = mraa.Gpio(12)


      3. Next set the pin to output mode.



      4. And then set it high or low to turn it on or off.



      All together in one script using digital pin 12 and blinking on/off ever second.

      #!/usr/bin/env python
      import mraa
      import time
      pin = mraa.Gpio(12) 
      while True:


      It is just that easy!


      You can download a script here that does it all for you : GitHub - joemcmanus/led: Intel Galileo LED python script


          root@galileo:~# ./led.py 1
          Blinking LED 1
          Using delay 10 and for 0 attempts
          Turning LED 1 on, for 10 seconds, count 0.
          root@galileo:~ ./led.py --help
          usage: led.py [-h] [--count COUNT] [--delay DELAY] [--version] pinNumber
          Simple LED Blinker for Galileo
          positional arguments:
            pinNumber      Specify the pin number, i.e. 0-13
          optional arguments:
            -h, --help    show this help message and exit
            --count COUNT  Number of times to execute, default infinity
            --delay DELAY  Number of seconds to wait between blinkings, default 10
            --version      show program's version number and exit